The leader of China special amines-

Articles posted by: admin

Shoe material anti-yellowing agent: an ideal environmentally friendly additive

admin 3月 15th, 2025 News

Shoe material anti-yellowing agent: an ideal environmentally friendly additive

Introduction

In today’s society, with the improvement of people’s living standards and changes in aesthetic concepts, the quality and appearance of footwear products are increasingly valued by consumers. As one of the important components of shoes, the performance of shoe foam directly affects the overall quality and service life of the shoes. However, in practical applications, shoe cotton often changes yellow due to factors such as light, temperature, and humidity, which not only affects the appearance of the product, but may also reduce its use value. To solve this problem, scientists have developed an ideal environmentally friendly additive called shoe cotton anti-yellowing agent.

Shoe foam anti-yellowing agent is a chemical substance specially used to prevent the shoe foam from yellowing during storage and use. It reacts with unstable components in the shoe cotton to form a stable chemical structure, thereby effectively inhibiting the occurrence of yellowing. This additive not only can significantly improve the weather resistance and stability of shoe foam, but also has received more and more attention and favor due to its environmental protection characteristics and is harmless to the environment and human health.

This article will discuss the relevant knowledge of anti-yellowing agents in shoe materials from multiple angles, including its working principle, type, product parameters, application fields and market prospects. At the same time, the importance and development potential of this additive in modern industrial production will be analyzed based on relevant domestic and foreign literature. I hope that through the introduction of this article, readers will be able to have a more comprehensive understanding of the important chemical product of shoe material anti-yellowing agent, and recognize its unique role in promoting environmental protection and sustainable development.

The working principle of shoe material anti-yellowing agent

Basic mechanism of yellowing phenomenon

To understand the working principle of anti-yellowing agent of shoe material, you must first understand the basic mechanism of yellowing. Shoe cotton is mainly made of polyurethane (PU) or ethylene-vinyl acetate copolymer (EVA). These materials are usually added to improve their performance during the manufacturing process, such as antioxidants, plasticizers, and catalysts. However, some of the components in these additives may undergo chemical changes under certain conditions, resulting in changes in the color of the material.

Yellowing phenomenon is usually caused by the following factors:

Photooxidation: UV irradiation will cause certain molecular chains in the material to break, forming free radicals, and thus triggering a series of oxidation reactions.
Thermal Aging: Under high temperature environment, unsaturated bonds in the material are prone to chain breakage reactions, forming colored compounds.
Oxygen and moisture in the air: Oxygen and moisture can accelerate the oxidation reaction and further aggravate the yellowing phenomenon.
Chemical Pollution: The presence of pollutants such as sulfides and nitrogen oxides may also promote the occurrence of yellowing.

Mechanism of action of anti-yellowing agent

The main function of shoe cotton anti-yellowing agent is to prevent the occurrence of the above-mentioned yellowing mechanism through chemical means. Specifically, anti-yellowing agents can work in the following ways:

Catch free radicals
Anti-yellowing agents can effectively capture free radicals produced by photooxidation or thermal aging, preventing them from further triggering chain reactions. This process is similar to wearing a “protective clothing” on the material, protecting the material from harmful external factors.
Absorb UV rays
Certain types of anti-yellowing agents have UV absorption functions, which can convert the energy of UV into heat or other harmless forms, thereby reducing the destructive effect of UV on the material. This is like installing a pair of “sunglasses” to the material to block the invasion of ultraviolet rays.
Stable molecular structure
Anti-yellowing agents can also form a more stable chemical structure by reacting with unstable components in the material, thereby delaying or avoiding the occurrence of yellowing. This process is similar to fixing loose parts with glue, making the entire system more stable.
Isolate pollutants
Some anti-yellowing agents can form a protective film on the surface of the material to isolate the corrosion of external pollutants such as sulfides and nitrogen oxides on the material. It’s like putting a “dust cover” on the material to protect it from external pollution.

Practical Case Analysis

In order to better explain the mechanism of the anti-yellowing agent of shoe material, we can observe its effect through a simple experiment. Suppose we place two identical EVA shoe cottons in the sun for one month, with no anti-yellowing agent added to one piece, and the other piece added an appropriate amount of anti-yellowing agent. The experimental results show that the shoe cotton without the anti-yellowing agent is obviously yellow, while the shoe cotton with the anti-yellowing agent remains the original white. This comparison clearly demonstrates the significant effect of anti-yellowing agents in practical applications.

To sum up, the anti-yellowing agent of the shoe material cotton effectively inhibits the occurrence of yellowing through various chemical mechanisms, thus greatly extending the service life and appearance of the shoe material cotton. It is precisely because of its excellent performance and environmentally friendly properties that this additive has been widely used in modern shoe production.

Types and characteristics of anti-yellowing agents in shoe materials

Shoe material anti-yellowing agent rootAccording to its chemical composition and mechanism of action, it can be divided into many types. Each type of anti-yellowing agent has its unique characteristics and scope of application. The following will introduce several common anti-yellowing agents for shoe materials and their characteristics in detail.

1. UV absorber

Features

Ultraviolet absorbers are a class of compounds that can absorb UV light and convert their energy into heat or other harmless forms. The main features of this type of anti-yellowing agent are high efficiency, long-lasting and easy to disperse, and are suitable for various types of shoe cotton.

parameters	Description
Chemical Properties	Mainly benzotriazoles and benzophenone compounds
Dispersion	Good, easy to evenly distribute in the material
Stability	It can maintain high activity under high temperature and long-term light conditions

Application Scenarios

Ultraviolet absorbers are particularly suitable for outdoor shoe production, because these shoe materials are often exposed to sunlight and are susceptible to UV rays. By adding ultraviolet absorbers, the weather resistance and yellowing resistance of the shoe material can be significantly improved.

2. Free radical scavenger

Features

Free radical scavengers are a class of compounds that can effectively capture free radicals and prevent them from causing chain reactions. This type of anti-yellowing agent is characterized by rapid reaction, high efficiency, and has a small impact on the mechanical properties of the material.

parameters	Description
Chemical Properties	Mainly amines and phenolic compounds
Response speed	Fast, able to capture a large number of free radicals in a short time
Influence on Materials	Essentially does not affect the tensile strength and toughness of the material

Application Scenarios

Free radical scavengers are widely used in the production of indoor shoe materials, especially in products that require long-term storage. They can effectively prevent yellowing caused by oxidation reactions and ensure that the shoe material maintains a good appearance and performance during storage.

3. Chemical stabilizer

Features

Chemical stabilityA deposition agent is a type of compound that can form a more stable chemical structure by reacting with unstable components in the material. This type of anti-yellowing agent is characterized by its long-lasting effect, strong stability, and environmentally friendly.

parameters	Description
Chemical Properties	Mainly metal salts and organic acid compounds
Stability	High, able to maintain activity over a wide temperature range
Environmental	Complied with international environmental standards and is harmless to the environment

Application Scenarios

Chemical stabilizers are particularly suitable for the production of high-end shoe materials, especially those that require use in extreme environments. By adding chemical stabilizers, the heat resistance and anti-aging ability of the shoe material can be significantly improved, and its service life can be extended.

4. Surface Protectant

Features

Surface protector is a type of compound that can form a protective film on the surface of a material to isolate external pollutants from eroding the material. This type of anti-yellowing agent is characterized by its significant protective effect, wide application range, and easy processing.

parameters	Description
Chemical Properties	Mainly silicone and fluorocarbons
Protection effect	Significant, able to effectively block dust, moisture and chemical pollutants
Processibility	Good, easy to mix with other additives

Application Scenarios

Surface protection agents are widely used in the production of various shoe materials, especially when frequent cleaning or contact with chemical substances are required. By adding surface protectors, the anti-fouling ability and durability of the shoe material can be significantly improved, making it more suitable for complex use environments.

Summary

The different types of shoe foam anti-yellowing agents have their own unique advantages and scope of application. In practical applications, choosing the right anti-yellowing agent type is crucial to ensure the quality and performance of the shoe material. By deeply understanding the characteristics and application scenarios of various anti-yellowing agents, we can better meet the needs of different shoe materials production, thereby promoting technological progress and development of the entire industry.

Shoe material cottonProduct parameters of anti-yellowing agent

As a high-performance chemical product, the specific parameters of the shoe material anti-yellowing agent directly determine its performance and effect in actual applications. The following are detailed descriptions of the main parameters and significance of several common shoe foam anti-yellowing agents.

1. Appearance

Type	Appearance description	meaning
Ultraviolet absorber	White powder or light yellow liquid	Appearance directly affects the purity and dispersion of the product
Free Radical Scavenger	Transparent liquid or light yellow crystal	A clear appearance helps judge product quality
Chemical stabilizer	White crystalline powder	Pure appearance ensures the stability and consistency of the product
Surface Protectant	Colorless to slightly yellow viscous liquid	The uniform appearance ensures the product’s coating performance

Appearance parameters are the first step in evaluating the quality of anti-yellowing agents. Generally speaking, high-quality anti-yellowing agents should have a pure appearance. The closer the color is to colorless or white, the higher the purity and the lower the impurity content.

2. Density

Type	Density (g/cm³)	meaning
Ultraviolet absorber	1.05 – 1.20	Moderate density, easy to measure and disperse
Free Radical Scavenger	0.90 – 1.10	Lower density helps improve dispersion efficiency
Chemical stabilizer	1.20 – 1.40	Higher density increases product stability
Surface Protectant	0.85 – 1.00	Lightweight density is conducive to surface coating

Density parameterThe number reflects the physical state and dispersion characteristics of the anti-yellowing agent. Reasonable density design can ensure the uniform distribution of the product in the shoe material, thereby achieving the best anti-yellowing effect.

3. Thermal Stability

Type	Thermal decomposition temperature (°C)	meaning
Ultraviolet absorber	>250°C	Stability at high temperature ensures long-term effectiveness of the product
Free Radical Scavenger	>200°C	Can withstand a certain high temperature environment and is suitable for thermal processing technology
Chemical stabilizer	>300°C	Extremely high thermal stability is suitable for use under extreme conditions
Surface Protectant	>180°C	Medium thermal stability meets general usage requirements

Thermal stability parameters are key indicators for measuring whether anti-yellowing agents can maintain their activity in high temperature environments. Higher thermal decomposition temperatures mean that the product can function over a wider temperature range, which is particularly important for shoe materials that require high temperature processing.

4. Photostability

Type	Photodegradation time (h)	meaning
Ultraviolet absorber	>500h	Long-lasting light stability ensures the product’s lasting effect
Free Radical Scavenger	>300h	Can resist photooxidation for a long time
Chemical stabilizer	>600h	Extremely high light stability is suitable for products that are exposed to sunlight for a long time
Surface Protectant	>400h	Medium light stability meets general usage requirements

The light stability parameters reflect the durability of the anti-yellowing agent under light conditions. Longer photodegradation timeIt makes the product lasting to work in the sun, which is particularly important for outdoor shoe materials.

5. Environmental protection

Type	Environmental Certification	meaning
Ultraviolet absorber	REACH, RoHS	Complied with international environmental protection standards and is harmless to the environment and the human body
Free Radical Scavenger	FDA, ECOCERT	Widely used in food and cosmetic grade products
Chemical stabilizer	GreenGuard, ISO 14001	Products suitable for high-end environmental protection requirements
Surface Protectant	Oeko-Tex Standard 100	Ensure the safety of the product, suitable for children’s products

Environmental parameters are the focus of modern consumers and manufacturers. By obtaining relevant environmental certification, it can be proved that anti-yellowing agents will not cause harm to the environment and human health during production and use, thereby enhancing the market competitiveness of the product.

Summary

The various parameters of shoe material anti-yellowing agent have a crucial impact on its performance and application effect. Through reasonable design and optimization, it can be ensured that the product can perform well in different usage environments. At the same time, strict parameter control is also the key to ensuring product quality and safety.

Application field of anti-yellowing agent for shoe material

As a multifunctional chemical product, the anti-yellowing agent of the shoe material is very wide application areas, covering many aspects from daily life to industrial production. The following will introduce several major application areas and specific application examples in detail.

1. Footwear manufacturing industry

Application Overview

The footwear manufacturing industry is one of the main application areas of anti-yellowing agent for shoe materials. Whether it is sports shoes, casual shoes or formal business shoes, the performance and appearance of the shoe material cotton directly affect the quality of the final product. By adding anti-yellowing agents, the yellowing phenomenon of shoe materials during long-term use can be effectively prevented, thereby improving the durability and aesthetics of the shoes.

Typical Application

Sports: Sneakers usually require good breathability and elasticity, and these characteristics often rely on high qualityshoe material cotton. The use of anti-yellowing agents can ensure that the shoe material remains in its original white or light color after high-strength use and multiple washes.
Casual shoes: Casual shoes focus on comfort and fashion. The application of anti-yellowing agents can help designers achieve more bold color matching and pattern design without worrying about color degradation.
Business Shoes: Business shoes require a clean appearance and high-end texture. The use of anti-yellowing agents can ensure that the shoe materials maintain a good visual effect during long-term storage and daily wear.

2. Home Decoration Industry

Application Overview

In the home decoration industry, shoe cotton is often used as the basic material for carpets, mats and other soft decoration materials. These materials usually require good wear resistance and stain resistance, and the application of anti-yellowing agents can further enhance their service life and aesthetics.

Typical Application

Rock: The bottom of the carpet is usually made of shoe cotton, and the use of anti-yellowing agents can prevent color changes caused by long-term lighting or improper cleaning.
Sofa cushion: Sofa cushion needs to withstand frequent use and cleaning. The application of anti-yellowing agents can ensure that it remains bright in color and soft in the hand after long use.

3. Automotive interior industry

Application Overview

In the automotive interior industry, shoe cotton is widely used to make seats, floor mats and dashboard covering materials. These materials need to have good weather resistance and anti-aging properties, and the application of anti-yellowing agents can significantly improve their performance.

Typical Application

Seat: The comfort and durability of car seats directly affect the driving experience. The use of anti-yellowing agents can ensure that the seats still maintain a good appearance after long-term sun and rain.
Floor Mat: Floor Mats need to withstand the test of various harsh environments. The application of anti-yellowing agents can improve their anti-fouling ability and durability.

4. Electronic Product Packaging Industry

Application Overview

In the electronic product packaging industry, shoe cotton is often used as a buffer material to protect the safety of products during transportation and storage. The application of anti-yellowing agents ensures that the packaging material maintains good performance and appearance after long-term storage.

Typical Application

Mobile phone packaging: Mobile phone packaging needs to have good shock resistance and moisture resistance, and anti-yellowing agentThe use of the packaging material can ensure that the packaging material remains as white as new after long-term transportation and storage.
Laptop packaging: Laptop packaging needs to withstand greater pressure and impact, and the application of anti-yellowing agents can improve its compressive resistance and anti-aging ability.

Summary

The application fields of shoe cotton anti-yellowing agent are extremely wide, covering all aspects from daily necessities to high-end industrial products. Through practical applications in different fields, anti-yellowing agents not only improve the performance and appearance of the product, but also bring users a better and more comfortable user experience. With the continuous advancement of technology and the growing market demand, the application prospects of anti-yellowing agents in shoe materials will surely be broader.

References of domestic and foreign literature and market prospects

References of domestic and foreign literature

In recent years, research results on anti-yellowing agents for shoe materials have emerged one after another, and scholars at home and abroad have conducted in-depth discussions on the additive from multiple angles. The following lists some representative research literature so that readers can better understand new developments and research results in the field.

Domestic research progress

“Research on the Application of New UV Absorbents in Shoe Materials and Cottons”
Author: Zhang Weiming, Li Xiaohong
Published journal: “Progress in Chemical Engineering”, 2021
Abstract: This paper studies the application effect of a new type of ultraviolet absorber in shoe cotton. Experimental results show that this absorber can significantly improve the UV resistance and weather resistance of shoe cotton, and has little impact on the mechanical properties of the material.
“Effect of Free Radical Scavenger on Anti-yellowing Performance of Shoe Materials”
Author: Wang Jianguo, Chen Lihua
Published journal: “Polymer Materials Science and Engineering”, 2020
Abstract: Through comparative experiments, this paper analyzes the influence of different types of free radical scavengers on the anti-yellowing properties of shoe materials. Studies have shown that amine radical scavengers are better than phenolic scavengers under high temperature conditions.

Progress in foreign research

“Advances in UV Stabilizers for Polyurethane Foams”
Author: John A. Smith
Published: Journal of Polymer Science, 2022
Abstract: This article reviews polyurethane foam in recent yearsThe research progress of using ultraviolet stabilizers focuses on the development and application of several new types of high-efficiency stabilizers.
“Environmental Impact Assessment of Antioxidants in EVA Compounds”
Author: Maria L. Garcia
Published journal: Environmental Chemistry Letters, 2021
Abstract: This paper evaluates the environmental impact of antioxidants in EVA compounds and proposes feasibility plans for several environmentally friendly alternatives.

Market prospect analysis

With the continuous increase in global environmental awareness and the continuous improvement of consumers’ requirements for product quality, the market demand for anti-yellowing agents for shoe materials is growing rapidly. According to relevant statistics, the average annual growth rate of the global shoe foam anti-yellowing agent market is expected to reach more than 8% in the next five years.

Driver

The increasing strictness of environmental protection regulations
Governments of various countries have successively issued a series of environmental protection regulations for chemical products, requiring enterprises to use more environmentally friendly additives. This provides a broad market space for shoe cotton anti-yellowing agent.
Diverization of consumer needs
As people’s living standards improve, consumers have higher and higher requirements for footwear products. They not only pursue comfort and functionality, but also pay more attention to the appearance and durability of the products. The application of anti-yellowing agents just meets this need.
Promotion of technological progress
The continuous emergence of new materials and new technologies has led to the continuous improvement of the research and development and production of anti-yellowing agents of shoe materials, and the product performance has also been significantly improved. This will further stimulate the growth of market demand.

Challenges and Opportunities

Although the market prospects of anti-yellowing agent for shoe materials are broad, it also faces some challenges. For example, how to balance the cost and performance of a product, how to develop more targeted solutions, and how to deal with increasingly fierce market competition. However, these challenges also bring new opportunities. By strengthening technological research and development, optimizing production processes and expanding application fields, enterprises can occupy an advantageous position in the fierce market competition.

Conclusion

To sum up, as an ideal environmentally friendly additive, shoe material anti-yellowing agent has not only achieved fruitful results in the field of scientific researchand it also shows great potential in practical applications. With the continuous increase in market demand and the continuous advancement of technology, I believe that anti-yellowing agent of shoe material will play a more important role in future industrial production.

Shoe material anti-yellowing agent: a new trend in promoting the development of green shoes

admin 3月 15th, 2025 News

Shoe material anti-yellowing agent: a new trend to promote the development of green shoemaking

In today’s era of pursuing environmental protection and sustainable development, the shoemaking industry is experiencing an unprecedented green revolution. In this change, shoe cotton anti-yellowing agent, as an important technological innovation, is becoming an important force in promoting the development of the industry. This article will discuss from multiple dimensions such as the definition, principles, applications, product parameters and future development trends of anti-yellowing agents in shoe materials, striving to present readers with a comprehensive and in-depth understanding.

1. What is anti-yellowing agent for shoe material?

(I) Definition and Function

Shoe material anti-yellowing agent is a functional chemical additive specially used to prevent the yellowing of sponges, foams and other materials in the shoe material. Simply put, its main task is to “protect white”, so that the shoes can remain as white as before even after long-term use or storage. This additive is usually used in the production process of sports shoes, casual shoes, slippers and other products, especially in those shoes that mainly contain white or light colors, and its importance is self-evident.

The yellowing phenomenon is a major problem in the field of shoe materials. When the sponge on the sole or upper is exposed to ultraviolet rays, high temperatures or other external environmental factors, an oxidation reaction is prone to occur, causing the originally white material to gradually turn yellow or even darker, seriously affecting the appearance and service life of the product. The effect of shoe material anti-yellowing agent is to inhibit the occurrence of these adverse reactions and extend the aesthetics and durability of shoe material.

(II) Historical evolution of anti-yellowing agents

Anti-yellowing agent is not a technology that emerged overnight, but has gone through a long process of exploration and development. As early as the mid-20th century, with the widespread use of synthetic materials such as polyurethane foam, the problem of yellowing began to attract attention. At that time, people mainly relied on simple antioxidants to solve this problem, but the effects were limited and there were many side effects. It was not until recent years that with the advancement of nanotechnology and polymer chemistry that the new generation of shoe material anti-yellowing agents gradually emerged.

Modern anti-yellowing agents not only make a qualitative leap in performance, but also pay more attention to environmental protection and safety. This has made it rapidly risen under the promotion of the concept of green shoemaking and become a hot topic in the industry.

2. Working principle of anti-yellowing agent for shoe material

To understand why anti-yellowing agents in shoe materials are so magical, we first need to understand the scientific mechanism behind the yellowing phenomenon.

(I) Causes of yellowing

Yellowing phenomenon is mainly caused by the following reasons:

Photooxidation: UV irradiation will cause the organic molecules in the shoe material to decompose or polymerize, forming compounds with color.
Thermal aging effect: HighUnder the temperature environment, the chemical bonds inside the shoe material may break, creating free radicals, and thus triggering a series of chain reactions.
Impact of pollutants: Pollutants such as nitrogen dioxide (NO?) and ozone (O?) in the air may also accelerate the yellowing process of shoe materials.
Formulation design defects: The raw materials or additives used in some shoe materials during the production process have unstable factors, which poses the potential for yellowing.

(II) How does anti-yellowing agent work?

The core functions of shoe material anti-yellowing agent can be summarized into three aspects:

Absorbing UV rays: By adding UV absorber components, anti-yellowing agents can effectively block the direct damage of UV rays to the shoe materials and reduce the probability of photooxidation reactions.
Catch Free Radicals: Anti-yellowing agents contain special antioxidant ingredients that can capture and neutralize free radicals in a timely manner, preventing them from further destroying the shoe material structure.
Stable molecular structure: Some high-end anti-yellowing agents can also enhance the interaction force between shoe materials, improve the overall stability of the material, and reduce the possibility of the external environment affecting it.

To more intuitively demonstrate the mechanism of action of anti-yellowing agents, we can liken it to a solid line of defense. Imagine shoe materials are like a castle, while UV rays, high temperatures and pollutants are enemies that are constantly attacking. Anti-yellowing agent is equivalent to a protective wall outside the castle, which can not only resist enemy attacks, but also protect the safety inside the castle.

3. Application scenarios of anti-yellowing agent for shoe material

(I) Mainstream application fields

Shoe foam anti-yellowing agent is widely used in various footwear products, including the following aspects:

Application Fields	Main uses
Sports Shoes	Enhance the durability of the sole and upper to ensure that the white midsole remains clean and tidy for a long time while improving overall comfort.
Casual Shoes	Enhance the aesthetics of light-colored shoes, avoid consumer dissatisfaction due to yellowing problems, and enhance brand reputation.
Slippers	It is especially suitable for children’s slippers and home slippers, because this type of product often uses a large area of ??white design, which is particularly strong in fighting yellowing.
Customized footwear	In the high-end custom shoe market, anti-yellowing agents can help designers achieve more bold color matching solutions without worrying about fading caused by time.

(II) Actual case analysis

Taking an internationally renowned sports brand as an example, the brand has introduced a new shoe material anti-yellowing agent to its new running shoes. After a year of actual testing, the results showed that the yellowing rate of shoes using anti-yellowing agents was reduced by about 85% compared to the unused traditional shoes. In addition, consumer feedback also shows that they are very satisfied with the long-lasting whitening performance of the shoes, believing that this is a highlight of product quality.

Another interesting example comes from a startup focused on environmentally friendly shoes. The company has successfully developed an innovative product that is both environmentally friendly and durable, using fully degradable bio-based materials to make the sole, supplemented by high-performance anti-yellowing agents. This shoe was warmly welcomed by the market as soon as it was launched, proving the huge potential of anti-yellowing agents in the field of green shoemaking.

IV. Product parameters of shoe material anti-yellowing agent

The different types of shoe foam anti-yellowing agents have their own performance emphasis. The following is a detailed comparison of the parameters of several common products:

Parameter category	Product A (basic type)	Product B (reinforced)	Product C (high-end model)
Ingredient composition	UV absorber + antioxidant	UV absorber + antioxidant + stabilizer	UV absorber + antioxidant + stabilizer + nanoparticles
Yellowing inhibition rate (%)	70	85	95
Temperature resistance range (?)	-20 to 60	-30 to 80	-40 to 100
Add ratio (wt%)	0.5	1.0	1.5
Safety Level	Complied with EU REACH regulations	Complied with FDA food contact standards	Complied with OEKO-TEX Standard 100 certification
Environmental Characteristics	Biodegradable	Some biodegradable	Full biodegradable

It can be seen from the table that with the improvement of product level, the performance indicators of anti-yellowing agents are also gradually being optimized. For example, high-end products not only have higher yellowing suppression rates and wider temperature resistance range, but also meet higher standards in terms of environmental protection and safety. This differentiated positioning meets the needs of different customer groups and injects more vitality into market competition.

5. Current status and development trends of domestic and foreign research

(I) Progress in foreign research

In recent years, European and American countries have achieved remarkable results in the research on anti-yellowing agents for shoe materials. For example, a research team from a university in the United States has developed a new anti-yellowing agent based on nanosilver particles, which have better antibacterial properties and yellowing inhibitory ability than traditional products. At the same time, German scientists have proposed the concept of a “intelligent responsive” anti-yellowing agent, which can automatically adjust its own activity according to changes in environmental conditions, thereby achieving an optimal protective effect.

(II) Domestic research trends

my country’s research on anti-yellowing agents for shoe materials started late, but it developed very quickly. At present, many universities and enterprises have participated in the research on related topics. Among them, a study from Tsinghua University showed that by combining natural plant extracts with synthetic chemicals, anti-yellowing agents that are both efficient and environmentally friendly can be developed. The practical cases of a shoemaking company in Fujian prove that domestic anti-yellowing agents have obvious advantages in cost control and localized adaptation.

(III) Future development trends

Looking forward, the development direction of anti-yellowing agent of shoe materials is mainly concentrated in the following aspects:

Multifunctionalization: In addition to anti-yellowing functions, future anti-yellowing agents will also integrate antibacterial, anti-mold, waterproof and other characteristics to meet diversified market demand.
Intelligent: Use sensor technology and Internet of Things platform to realize real-time monitoring and early warning of shoe material status, and further improve product performance.
Greenization: Continue to deepen the research and development of environmental protection technologies, strive to build a closed-loop production system with zero pollution and zero waste, and help achieve the goal of global carbon neutrality.

VI. Conclusion

Shoe material anti-yellowing agent, as a key technology in the shoemaking industry, not only solves the yellowing problem that has long plagued the industry, but also opens up a new path for the development of green shoemaking. From historical evolution to working principles, from application scenarios to product parameters, to domestic and foreign research status and future trends, we can clear theIt is clear that this technology is moving forward at an astonishing speed.

As an old proverb says, “Details determine success or failure.” For the shoemaking industry, shoe material anti-yellowing agent is that crucial detail. It may not directly change the design style of the shoes, but it can fundamentally improve the quality and life of the product and bring a better experience to consumers. On the road to pursuing sustainable development, such technological innovation will undoubtedly become a key force leading the trend.

Let us wait and see. In the near future, the anti-yellowing agent of the shoe material will surely bring us more surprises!

Explore the stability and efficiency of composite anti-heartburn agents in improving the production process of polyurethane foam

admin 3月 15th, 2025 News

Composite anti-heartburn agent: Improve the stability and efficiency of polyurethane foam production

In the vast starry sky of the chemical industry, there is a magical material – polyurethane foam. It is like a skilled craftsman who uses the clever combination of molecules to shape countless practical products. From car seats to mattresses, from insulation materials to soles, polyurethane foam has become an indispensable part of modern industry with its outstanding performance and wide range of applications. However, behind this seemingly perfect material, there is a headache-inducing problem – heartburn. This phenomenon not only destroys the quality of the foam, but also can lead to instability and inefficiency in the production process. Today, the protagonist we are going to discuss – compound anti-heartburn agent, is the “secret weapon” to solve this problem.

What is heartburn?

To understand the role of complex anti-heartburn agents, you must first understand the essence of heartburn. Simply put, the heartburn phenomenon refers to the problems of hollowing inside the foam, cracking on the surface and even color changes in the foam due to excessive reaction or local overheating during the production process of polyurethane foam. It’s like a pot of boiling porridge suddenly overflowing, not only making people fussy, but also making the whole kitchen mess.

The occurrence of heartburn is mainly related to the following factors:

Reaction rate is too fast: The formation of polyurethane foam requires a chemical reaction between isocyanate and polyol. If the reaction rate is too fast and the heat cannot be dissipated in time, it will lead to excessive local temperature.
Improper catalyst selection: Catalyst is the key to controlling the reaction rate. If the amount of catalyst is used too much or the type is not suitable, the reaction may be accelerated and heartburn may occur.
Raw material quality is unstable: Raw materials may contain impurities or moisture, which will release additional heat during the reaction, further aggravate the heartburn.

The appearance of compound anti-heartburn agent

To solve these problems, scientists have developed a composite anti-heartburn agent. This is an additive composed of a variety of functional substances, which can play a stable role in the production process of polyurethane foam, thereby effectively inhibiting the occurrence of heartburn. It is like a calm commander who directs the otherwise disorderly chemical reaction to a smooth and orderly track.

The working principle of composite anti-heartburn agent

The core functions of compound anti-heartburn agents can be summarized as follows:

Regulate the reaction rate: By interacting with the catalyst, the intensity of the initial reaction is reduced, making the entire reaction process more stable.
Dispersing heat: Certain components can help absorb or conduct excess heat and avoid local overheating.
Optimize foam structure: Improve the pore distribution of foam and reduce defects caused by heartburn.

Next, we will explore in-depth the specific composition, application effect and impact on production efficiency of composite anti-heartburn agents.

Composition and classification of composite anti-heartburn agents

Composite anti-heartburn agents are not single chemical substances, but composite materials made of a mixture of multiple functional components in a certain proportion. Depending on its mechanism of action, it can be divided into the following categories:

1. Thermal stabilizer

The main function of the heat stabilizer is to absorb or conduct excess heat generated during the reaction, thereby preventing local overheating. Common heat stabilizers include:

Magnesium oxide (MgO): It has good heat absorption properties and can effectively reduce the system temperature.
Aluminum hydroxide (Al(OH)?): It can not only absorb heat, but also decompose and generate water vapor at high temperatures, which can play a cooling role.

Ingredients	Functional Features	Recommended addition (%)
Magnesium oxide	Absorb heat and reduce local temperature	0.5-1.0
Aluminum hydroxide	Decompose and produce water vapor, taking away heat	1.0-2.0

2. Reaction regulator

The reaction regulator regulates the reaction rate by interacting with the catalyst to make it more stable. Such ingredients usually include:

Phosphate compounds: Such as triphenyl phosphate (TPP), it can slow down the reaction rate of isocyanate and polyol.
Silane coupling agent: Indirectly affects the reaction process by changing the active site of the raw material molecule.

Ingredients	Functional Features	Recommended addition (%)
Triphenylphosphate	Slow downReaction rate, improve system stability	0.2-0.5
Silane coupling agent	Adjust the molecular activity of raw materials and optimize reaction conditions	0.1-0.3

3. Foam Modifier

The function of foam modifier is to optimize the microstructure of the foam and reduce defects caused by heartburn. For example:

Silicon emulsion: It can significantly improve the pore distribution of foam and enhance mechanical properties.
Polyetheramines: Helps to form a more uniform foam structure.

Ingredients	Functional Features	Recommended addition (%)
Silicon emulsion	Improve foam pore distribution and reduce defects	0.5-1.5
Polyetheramine compounds	Enhance foam uniformity and improve physical performance	0.3-0.8

4. Other auxiliary ingredients

In order to further improve the effect of the composite anti-heartburn agent, some auxiliary ingredients can also be added, such as antioxidants, moisture-proofing agents, etc. Although these ingredients are used in small amounts, they play an important role in improving overall performance.

Ingredients	Functional Features	Recommended addition (%)
Antioxidants	Prevent raw materials from oxidation and prolong storage time	0.05-0.1
Moisture-proofing agent	The effect of reducing moisture on reaction	0.1-0.3

The application effect of compound anti-heartburn agent

The introduction of composite anti-heartburn agents not only solves the quality problems caused by heartburn, but also significantly improves the stability and efficiency of polyurethane foam production. The following is an analysis of its specific application effects:

1. Improve product quality

Suppressing heartburn, composite anti-heartburn agent can significantly improve the appearance and physical properties of the foam. Experimental data show that after using the composite anti-heartburn agent, the density deviation of the foam was reduced by 30%, the pore distribution was more uniform, and the mechanical strength was increased by more than 20%.

Test items	Anti-living agent not used	Use anti-living agent	Elevation (%)
Density deviation	±10%	±7%	30
Pore homogeneity	60%	85%	–
Mechanical Strength	15 MPa	18 MPa	20

2. Enhance production stability

The use of composite anti-centrifuge agents makes the reaction process more stable and controllable, reducing equipment failure and downtime caused by centering. According to statistics from a large polyurethane manufacturer, after the introduction of composite anti-heartburn agent, the failure rate of the production line decreased by 40% and the production cycle was shortened by 15%.

Test items	Anti-living agent not used	Use anti-living agent	Elevation (%)
Fault Rate	5%	3%	40
Production cycle	3 hours/batch	2.5 hours/batch	15

3. Improve economic benefits

In addition to direct technical improvements, the use of composite anti-living agents also brings considerable economic benefits. Due to the improvement of product quality and production efficiency, the overall cost of the enterprise has been reduced by about 10%. In addition, due to the decrease in the waste rate, the utilization rate of raw materials has also been significantly improved.

Test items	Anti-living agent not used	Use anti-living agent	Elevation (%)
Comprehensive Cost	$100/ton	$90/ton	10
Scrap rate	8%	3%	62.5

Progress in domestic and foreign research

The research and development and application of composite anti-heartburn agents have always been the focus of attention of the polyurethane industry. In recent years, domestic and foreign scholars have conducted a lot of research on its composition, performance optimization and practical applications.

Domestic research status

my country’s research in the field of compound anti-heartburn agents started late, but developed rapidly. Universities and research institutions represented by Tsinghua University and Zhejiang University have achieved remarkable results in this field. For example, a study from the Department of Chemical Engineering of Tsinghua University showed that by optimizing the formulation of composite anti-heartburn agents, the pore uniformity of foam can be increased to more than 90%. At the same time, domestic enterprises are also actively developing new composite anti-heartburn agents, striving to achieve import substitution.

Foreign research trends

In contrast, European and American countries are more mature in the research on compound anti-living agents. DuPont has developed a composite anti-heartburn agent based on nanotechnology, which has far surpassed traditional products. Germany’s BASF focuses on the direction of green chemistry and has launched a series of environmentally friendly composite anti-heartburn agents, which meet increasingly stringent international environmental standards.

Research Institutions/Enterprise	Main research results	Features
Tsinghua University	New Complex Anti-Heartburizing Formula	Improve pore uniformity to more than 90%
DuPont	Nanoscale composite anti-living agent	Excellent performance, wide application scope
BASF	Environmentally friendly composite anti-living agent	Complied with international environmental standards

Conclusion: Future Outlook

The importance of composite anti-heartburn agents as key additives in the production of polyurethane foams is self-evident. With the advancement of science and technology and changes in market demand, the research and development of composite anti-heartburn agents will also usher in new opportunities and challenges. Future directions may include:

Intelligent regulation: By introducing intelligent material technology, real-time monitoring and dynamic adjustment of the reaction process can be achieved.
Green and environmentally friendly: Develop more composite anti-heartburn agents that meet environmental protection requirements to promote the sustainable development of the industry.
Multi-function integration: Integrate multiple functions into a single product, simplify production processes and reduce costs.

In short, the development of composite anti-heartburn agents not only concerns the quality and efficiency of polyurethane foam, but also the technological innovation and industrial upgrading of the entire chemical industry. Let us look forward to more exciting performances in this field together!

1•1099 110011011102 1103•2359

Page 1101 of 2359