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Epoxy resin anti-yellowing agent: a key technology to improve the color stability of the paint

3月 15th, 2025 News

Epoxy resin anti-yellowing agent: a key technology to improve the color stability of the paint

1. Introduction

In the world of paint, color is the soul, and stability is the continuation of life. Just imagine, if you bought a brand new red sports car that was bright and dazzling when you drove home, but it turned into a dull orange within a few months, how would you feel? This phenomenon is called “yellow change”, and it is like a silent erosion that makes the originally beautiful colors pale. In order to fight against this stubborn enemy, scientists have developed a magical weapon – epoxy resin anti-yellowing agent.

Epoxy resin itself is a material with excellent performance, with high strength, high adhesion and good chemical resistance. However, its shortcomings cannot be ignored, and the headache is that it is prone to yellowing. Especially in ultraviolet irradiation, high temperature or humid heat environments, the aromatic structure in epoxy resin molecules will undergo an oxidation reaction, causing them to gradually turn yellow or even brown, seriously affecting the appearance and service life of the product. Therefore, how to effectively suppress the yellowing of epoxy resin has become an important topic in the coatings industry.

Epoxy resin anti-yellowing agent came into being. It is like a “whitening cream” in the coating industry, which can help epoxy resin maintain long-term freshness and brightness. This article will start from the basic principles of anti-yellowing agents, introduce its classification, mechanism of action, application fields and future development directions in detail, and analyze its actual effects through specific cases. In addition, we will also discuss relevant research progress at home and abroad to provide readers with a comprehensive and in-depth knowledge system.

Next, let us unveil the mystery of epoxy resin anti-yellowing agent!

2. Basic knowledge of epoxy resin anti-yellowing agent

(I) What is epoxy resin?

Epoxy resin is a polymer compound containing epoxy groups (C-O-C), which is usually produced by reacting bisphenol A or similar substances with epoxy chloride. It has the following outstanding features:

  1. Excellent mechanical properties: After curing the epoxy resin forms a three-dimensional network structure, showing extremely high strength and toughness.
  2. Excellent adhesion ability: Epoxy resin firmly adheres to its surface, whether it is metal, wood or plastic.
  3. Strong chemical corrosion resistance: Epoxy resin can maintain stable performance even if exposed to acid and alkali environment for a long time.
  4. Good electrical insulation: Due to its non-conductive properties, epoxy resins are widely used in electronic component packaging.

However, epoxy resin is not perfect. As the use time increases, especially under the influence of external environmental factors, its color may beGradually turning yellow or even darker, this is the so-called “yellow change”.

(II) Reasons for yellowing of epoxy resin

The yellowing of epoxy resin is mainly related to its internal chemical structure. Here are a few key reasons:

  1. Photosensitiveness of aromatic structures
    Most epoxy resins contain aromatic structures such as benzene rings, which are particularly sensitive to ultraviolet rays. When exposed to ultraviolet light, the benzene ring may undergo an oxidation reaction, forming quinone compounds or other colored by-products, which will turn yellowing of the material.

  2. The function of amine curing agent
    In epoxy resin formulations, commonly used amine curing agents (such as fatty amines and aromatic amines) will cross-link with epoxy groups during the curing process. However, such curing agents themselves may also be oxidized, further aggravating the occurrence of yellowing.

  3. The influence of moisture and oxygen
    Humidity and oxygen are one of the important causes of yellowing. Water molecules can penetrate into the epoxy resin and work together with oxygen to promote the formation of free radicals, thereby accelerating the oxidation reaction.

  4. Thermal aging effect
    Under high temperature environments, the molecular chains of epoxy resin may break or rearrange, resulting in new non-ferrous groups, resulting in more obvious yellowing.

(III) Definition of epoxy resin anti-yellowing agent

Epoxy resin anti-yellowing agent is a class of functional additives specially used to inhibit the yellowing of epoxy resin. They delay or prevent the oxidative degradation process of epoxy resin by absorbing ultraviolet rays, capturing free radicals or passivating catalysts, thereby maintaining the color stability and overall performance of the material.

3. Classification and mechanism of anti-yellowing agent of epoxy resin

Depending on the function and mechanism of action, epoxy resin anti-yellowing agents can be divided into the following categories:

(I) UV absorber

1. Definition and Function

Ultraviolet absorbers are functional compounds that selectively absorb UV light and convert it into heat release. Their main task is to reduce the direct damage to the epoxy resin by UV rays, thereby reducing the possibility of yellowing.

2. Common Types

  • Benzotriazoles: Representative products include UV-326, UV-328, etc. This type of compound has high light absorption efficiency and good weather resistance.
  • Hydroxybenzophenones: such as UV-531,UV-P, etc. They are cheaper, but have slightly less heat resistance than benzotriazoles.
  • Substitute acrylonitrile: For example, the TINUVIN series. This type of product has excellent light absorption and dispersion.

3. Mechanism of action

UV absorbers work through the following steps:

  • Absorb UV energy;
  • Release energy in the form of thermal energy;
  • Stops the free radical reaction caused by ultraviolet light.
Type Features Typical Products
Benzotriazoles High-efficient light absorption and good heat resistance UV-326, UV-328
Hydroxybenzophenone Low cost and easy to process UV-531, UV-P
Substitute acrylonitrile Excellent comprehensive performance TINUVIN Series

(Bi) Free radical capture agent

1. Definition and Function

Free radical capture agents, also known as antioxidants, are mainly used to capture free radicals generated during oxidation of epoxy resins and prevent them from further initiating chain reactions. Such additives are essential for delaying yellowing.

2. Common Types

  • Stealed Phenols: such as Irganox 1010, Irganox 1076, etc. They have strong antioxidant ability and are suitable for a variety of scenarios.
  • phosphites: such as Irgafos 168, Tris(2,4-di-t-butylphenyl) phosphite, etc. This type of compound can decompose hydroperoxides and jointly enhance the antioxidant effect.

3. Mechanism of action

Free radical capture agents work by:

  • Binding with free radicals to form stable compounds;
  • Decompose harmful intermediates and terminate chain reaction;
  • Improve the overall antioxidant properties of epoxy resin.
Type Features Typical Products
Stealed Phenols Strong antioxidant, wide application scope Irganox 1010
Phosophites Sync-Effectiveness, decomposition of hydroperoxide Irgafos 168

(III) Photo stabilizer

1. Definition and Function

Photostabilizers are a class of additives that inhibit photoinduced degradation reactions. They protect epoxy resins from ultraviolet rays by quenching excited molecules or passivation catalysts.

2. Common Types

  • Nickel complexes: such as Tinuvin 111, Tinuvin 292, etc. This type of product is particularly effective for polyolefin materials, but it is relatively less used in epoxy resins.
  • Organic Nickel Salt: such as Chimassorb 944. They have a long service life and good weather resistance.

3. Mechanism of action

The core functions of light stabilizers include:

  • Quckle the excited state molecules to prevent energy transfer;
  • Passive photosensitive catalyst to reduce side reactions;
  • Improve the long-term stability of epoxy resin.
Type Features Typical Products
Nickel Complex Inhibit light-induced degradation Tinuvin 111
Organic nickel salt Strong durability and good weather resistance Chimassorb 944

(IV) Complex anti-yellowing agent

1. Definition and Function

Compound anti-yellowing agent refers to a product made by reasonably combining the above-mentioned single types of anti-yellowing agents. Through synergy, they can achieve better overall performance.

2. Advantages

  • Veriodic: It also has ultraviolet absorption, free radical capture and lightStability and other functions.
  • Efficiency: The components cooperate with each other to significantly improve the anti-yellowing effect.
  • Economic: Composite products are more cost-effective than using a large number of single-type additives alone.

3. Typical formula examples

Ingredients Additional amount (wt%) Function
UV-326 0.5 Absorb UV rays
Irganox 1010 0.3 Capture free radicals
Tinuvin 111 0.2 Provides light stability

IV. Application fields of epoxy resin anti-yellowing agent

Epoxy resin anti-yellowing agent has been widely used in many industries due to its unique properties. The following are several typical areas and their specific needs:

(I) Automobile Industry

In modern automotive coating processes, epoxy resins are often used as primer or intermediate coating materials. However, body parts exposed to the sun for a long time are prone to yellowing problems, which affects the beauty of the whole vehicle. To this end, it is particularly important to add an appropriate amount of anti-yellowing agent.

  • Recommended Solution: Use composite anti-yellowing agents (such as UV-326 + Irganox 1010), which can not only resist UV rays, but also capture free radicals, ensuring that the coating lasts and brightens.

(II) Architectural Decoration

In indoor and outdoor decoration, epoxy resin floor paint is highly favored for its wear resistance, anti-slip and easy to clean. But if not protected, the floor paint may lose its original luster due to yellowing.

  • Solution: Use efficient ultraviolet absorbers (such as UV-531), combined with appropriate construction technology, which can effectively extend the service life of floor paint.

(III) Electronics and Electrical

Epoxy resins are widely used in integrated circuit packaging, transformer potting and other fields. However, yellowing problems in high temperature environments may affect the electrical performance of the product.

  • Coping strategies: Add heat-resistant antioxidants (such as Irgafos 168) and optimize curing process parameters to improve product reliability.

5. Domestic and foreign research progress and development trends

(I) Current status of foreign research

In recent years, developed countries in Europe and the United States have achieved many breakthrough results in the field of epoxy resin anti-yellowing agents. For example, Germany’s BASF has developed a new nanoscale ultraviolet absorber with a particle size of only a few dozen nanometers, with higher dispersion and light absorption efficiency. DuPont, the United States, focuses on the research and development of composite anti-yellowing agents and has launched a number of high-performance products to meet the needs of different application scenarios.

(II) Domestic research trends

my country’s research on epoxy resin anti-yellowing agents started late, but developed rapidly. The team from the Department of Chemical Engineering of Tsinghua University proposed a method for preparing anti-yellowing agent based on supramolecular assembly technology, which greatly improves the stability and adaptability of the product. In addition, the Institute of Chemistry, Chinese Academy of Sciences is also exploring a green synthesis route, striving to reduce production costs and reduce environmental pollution.

(III) Future development direction

  1. Intelligent design: Use computer simulation technology to predict the molecular structure and performance relationship of anti-yellowing agents, and accelerate the development of new products.
  2. Green and environmentally friendly: Developing non-toxic, harmless and easy to degrade anti-yellowing agents, in line with the concept of sustainable development.
  3. Multi-function integration: Integrate anti-yellowing, anti-corrosion, anti-bacterial and other functions into the same product to enhance comprehensive competitiveness.

VI. Summary

Epoxy resin anti-yellowing agent, as one of the core technologies of the coating industry, has an irreplaceable effect on improving product color stability and extending service life. Through the research and application of ultraviolet absorbers, free radical capture agents, light stabilizers and composite anti-yellowing agents, we can better solve the problem of yellowing of epoxy resins and promote technological progress in related industries.

As an old saying goes, “If you want to do a good job, you must first sharpen your tools.” Only by mastering the essence of epoxy resin anti-yellowing agent can you occupy a favorable position in the fierce market competition. I hope that the content of this article can inspire you, and I also look forward to the release of more excellent anti-yellowing agents to add more color to our lives!

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How to use epoxy resin anti-yellowing agent to enhance the aesthetics of floor coatings

3月 15th, 2025 News

Epoxy resin anti-yellowing agent: Let the floor coating shine for a lasting brilliance

1. Introduction: Why do we need to resist yellowing?

In our lives, the floor is not only a support under our feet, but also an important part of home aesthetics. Whether it is a modern minimalist style or a retro and luxurious style, the appearance of the floor directly affects the style and atmosphere of the entire space. However, over time, many floor coatings will gradually lose their original luster and even experience troublesome “yellowing”. This phenomenon is like a sudden “skin aging”, making the originally glossy floor dull, and even makes people wonder whether it can continue to be competent for the important task of decorating the home.

So, what is the yellowing of floor coating? Simply put, yellowing refers to the phenomenon that the floor surface coating undergoes chemical changes due to external environmental factors (such as ultraviolet rays, high temperatures, moisture, etc.), causing the color to change from the original transparent or light color to yellow or brown. This change not only destroys the aesthetics of the floor, but may also affect its functionality, such as wear resistance and stain resistance. Imagine how disappointing it would be if the floor at home had changed from the crystal clear ones to the dark yellow ones! Therefore, how to effectively prevent the yellowing of floor coatings has become a common concern for many designers, construction workers and ordinary consumers.

In order to solve this problem, scientists have developed a magical substance – epoxy resin anti-yellowing agent after long-term research. It is like an invisible “beautician” who can penetrate deep into the floor coating, repair damaged structures, delay the occurrence of yellowing, and thus keep the floor in a long and new state. This article will comprehensively analyze the mechanism of action, product parameters and application techniques of epoxy resin anti-yellowing agent from multiple angles, and combine it with relevant domestic and foreign literature to help everyone better understand and use this high-tech material.

Next, we will discuss from the following aspects: first, introduce the basic principles and importance of epoxy resin anti-yellowing agent; second, analyze the specific parameters and performance characteristics of the product in detail; then discuss how to correctly choose and use anti-yellowing agent to achieve the best results; then summarize its practical significance for improving the aesthetics of floor coatings. I hope this article can provide readers with a detailed and practical guide to keep your floors shining!

2. Working principle and importance of epoxy resin anti-yellowing agent

(I) Basic concepts of epoxy resin anti-yellowing agent

Epoxy resin is a polymer material widely used in industry and daily life. It is famous for its excellent bonding, corrosion resistance and mechanical strength. However, traditional epoxy resins are prone to oxidation reactions when exposed to ultraviolet light for a long time, causing the molecular chain to break and release of carbonyl compounds, thus gradually turning the coating yellow or brown. This phenomenon, known as “yellowing”, is a major problem facing many epoxy resin products, including floor coatingsone.

To overcome this shortcoming, scientists have developed an additive specifically used to inhibit yellowing, an epoxy resin anti-yellowing agent. This type of substance is usually composed of antioxidants, ultraviolet absorbers and stabilizers, and uses a variety of ways to work together to protect epoxy resins from the external environment. For example, they can capture free radicals and prevent the oxidation reaction; they can also absorb ultraviolet energy to reduce the possibility of photodegradation; they can also improve the molecular structure of epoxy resins and enhance their overall stability.

(II) The importance of anti-yellowing agents

  1. Extend service life
    The presence of anti-yellowing agent allows the epoxy resin coating to resist time erosion and significantly extend its service life. For flooring, this means that even after years of use, the initial shine and color can still be maintained without frequent refurbishment or replacement.

  2. Enhance aesthetics
    As one of the core elements of interior decoration, the flooring directly affects the living experience. The anti-yellowing agent ensures that the floor always presents a fresh and bright effect by preventing the coating from discoloring, adding more vitality and warmth to the home.

  3. Reduce maintenance costs
    Once the floor coating without anti-yellowing agent turns yellow, it often requires re-sanding, painting or even replacing the entire floor, which undoubtedly adds an additional financial burden. Products that use anti-yellowing agents can maintain good condition through simple cleaning and maintenance, greatly reducing the cost of later maintenance.

  4. Environmentally friendly
    Some high-quality anti-yellowing agents are made of renewable resources and have low emissions of volatile organic compounds (VOCs), which meets the requirements of modern society for green and environmental protection. In addition, the reduction of the need for waste disposal caused by yellowing also indirectly promotes the development of a resource-saving society.

In short, epoxy resin anti-yellowing agent is not only the crystallization of technological progress, but also an important tool for achieving sustainable development. It not only solves the pain points in practical applications, but also creates a more comfortable and healthy living environment for us.

3. Detailed explanation of product parameters of epoxy resin anti-yellowing agent

(I) Main components and functions

The formulation design of epoxy resin anti-yellowing agent is very particular. Different ingredients each undertake specific tasks and jointly build a strong protection system. The following are several common core components and their functions:

Ingredient Name Function Description
Antioxidants Neuterate free radicals, slow down the oxidation process, and avoid the formation of carbonyl compounds, thereby effectively preventing the occurrence of yellowing.
Ultraviolet absorber Absorb the harmful bands in ultraviolet rays, convert them into heat energy and emit them, reducing the aging reaction caused by light.
Light Stabilizer Improve the tolerance of epoxy resin to photochemical reactions and further consolidate the anti-yellowing effect.
Dispersant Even distribution of other active ingredients ensures that they fully function in the coating while improving the flatness and adhesion of the coating.

(II) Physical and chemical properties

Each anti-yellowing agent has unique physical and chemical characteristics, which determine its scope of application and usage. The following table lists some key parameters for typical epoxy resin anti-yellowing agents:

Parameter category Unit Reference value range Remarks
Appearance – Light yellow to colorless liquid The lighter the color, the higher the purity and the stronger the anti-yellowing performance.
Density g/cm³ 0.9-1.1 Affects the fluidity and coverage area of ??the coating during construction.
Viscosity mPa·s 50-300 Often the viscosity may cause the coating to be too thin, and it will be difficult to apply evenly.
Volatile Organic Compounds % ?5 Control to a lower level helps meet environmental regulations.
Thermal Stability ? >200 It can remain stable in high temperature environments and is suitable for floor coatings used in floor heating systems.
Compatibility – Compatible with common solvents and resins Ensure that there will be no adverse reactions or precipitation after mixing with other materials.

(III) Comparison of performance advantages

To understand the advantages of epoxy resin anti-yellowing agents more intuitively, we can compare it with traditional epoxy resin coatings without the addition of anti-yellowing agents. The following table shows the differences between the two in various performance indicators:

Performance metrics Traditional epoxy resin coating Coating after adding anti-yellowing agent Improvement (%)
Yellow-resistant time About 6 months ?3 years +800%
Gloss retention rate 50%-70% ?90% +40%
Abrasion resistance Medium Sharp improvement +30%
Chemical corrosion resistance Winner Stronger +25%
Construction convenience Functions and sags are prone to occur Better leveling +20%

From the above data, it can be seen that the epoxy resin coating after adding anti-yellowing agent shows obvious advantages in multiple dimensions, especially the improvement in yellowing resistance time and gloss retention rate. This is exactly why more and more engineering projects are starting to prioritize floor coating solutions containing anti-yellowing agents.

IV. How to choose and use epoxy resin anti-yellowing agent

(I) Choose the right product

There are various brands of epoxy resin anti-yellowing agents on the market. How to choose the product that suits you is a question worth pondering. Here are a few important considerations:

  1. Application Scenarios
    The requirements for floor coating vary in different places. For example, home flooring may focus more on aesthetics and comfort, while commercial spaces need to take into account the characteristics of high strength and easy cleaning. Therefore, when purchasing anti-yellowing agents, the corresponding grade of products should be selected according to the specific purpose.

  2. Budget Limit
    Although high-end anti-yellowing agents have superior performance, they are relatively high in price; while low-end products are cheap, they may have problems such as unstable effects. It is recommended to fully weigh the cost-effectiveness when formulating a budget and find solutions that suit your needs.

  3. Brand reputation
    Choosing products from well-known brands is usually more guaranteed, because these companies often have a complete quality control system and technical support team. In addition, viewing user reviews and case sharing can also help determine whether a brand is trustworthy.

(II) Correct usage method

Even if high-quality anti-yellowing agent is selected, the expected results may not be achieved if used improperly. Here are a few key steps and precautions:

  1. Stir well
    Always stir thoroughly the mixture of anti-yellowing agent and epoxy resin before use to ensure that all ingredients are evenly distributed. Failure to do so may result in insufficient local protection or uneven coating.

  2. Control dosage
    Too much or too little anti-yellowing agents will affect the final effect. It is generally recommended to add it according to the manufacturer’s instructions, and if necessary, you can determine the best ratio through experiments.

  3. Construction Environment
    Environmental conditions such as temperature and humidity are crucial to the performance of anti-yellowing agents. Ideally, construction should be carried out in an environment with a temperature of 15-30°C and a relative humidity below 75% to ensure the smooth progress of the coating curing process.

  4. Super maintenance
    The newly laid floor coating takes some time to fully cure. During this period, heavy objects or chemical contact should be avoided to prevent damage to the protective layer formed by the anti-yellowing agent.

V. Practical application cases of epoxy resin anti-yellowing agent

In order to better demonstrate the powerful effects of epoxy resin anti-yellowing agent, here are two typical practical application cases for reference:

Case 1: High-end villa floor renovation project

The owner of a luxury villa is dissatisfied with the appearance of its original wooden floor and believes that he has lost the gloss and texture it should have. After professional evaluation, it was found that this was due to severe yellowing of the floor coating. So it was decided to use a new epoxy resin anti-yellowing agent for a comprehensive renovation. After the construction was completed, the floor rejuvenated with charming brilliance, as if it was back to its first installation. Moreover, after a year of follow-up observation, there was no obvious sign of yellowing again, and the customer concludedGuo expressed very satisfied.

Case 2: Large shopping mall floor project

A large shopping mall particularly emphasizes the choice of floor materials during the construction process, requiring good wear resistance and slip resistance, and aesthetics and environmental protection. Finally, epoxy resin floor coatings containing high-performance anti-yellowing agents were selected. After two years of use, although it received a large number of customers every day and was often exposed to direct sunlight, the floor still maintained its original bright color and received widespread praise from merchants and consumers.

6. Conclusion: Make the floor young forever

Through the detailed introduction of this article, I believe readers have fully realized the key role played by epoxy resin anti-yellowing agents in improving the aesthetics of floor coatings. It is not only a technological innovation achievement, but also a bridge connecting art and science, allowing us to enjoy the convenience of modern life without worrying about the traces left by time. Of course, in order to truly achieve this goal, we also need to strictly check the product selection and construction process and follow scientific and standardized operating procedures.

In the future, with the continuous emergence of new materials and new technologies, the application field of epoxy resin anti-yellowing agents will be further expanded to create more beautiful living environments for mankind. May every friend have his own “eternal youthful” floor, adding more fun and surprise to his daily life!

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Anti-corrosion application of epoxy resin anti-yellowing agent in ship manufacturing

3月 15th, 2025 News

Anti-corrosion application of epoxy resin anti-yellowing agent in ship manufacturing

1. Introduction: Start with “rust”

If you have ever strolled by the sea, you will definitely notice the moored ships, which are often dressed in a bright coat, as if showing off their beauty to the sea. However, have you ever wondered why these ships can remain so glamorous in a salt fog-filled and unbearable marine environment? The answer is actually very simple – behind this is a magical material: epoxy resin and its matching anti-yellowing agent.

1.1 Corrosion Problem: Ship’s “Invisible Enemy”

Corrosion is an eternal topic for ships. Whether it is a steel hull or other metal parts, it can suffer severe erosion due to long-term exposure to seawater, air and sunlight. This erosion not only affects the appearance, but also may lead to a decrease in structural strength and even cause safety accidents. Imagine how a tragic picture it would be if a giant ship full of cargo sank due to corrosion and perforation of the steel plate at the bottom! Therefore, how to effectively prevent corrosion has become one of the core issues in the ship manufacturing industry.

1.2 Epoxy resin: “superhero” in the anticorrosion industry

Among the numerous anticorrosion materials, epoxy resin stands out for its outstanding performance. It has excellent adhesion, chemical resistance and mechanical strength, and can provide a strong protective barrier for the ship. However, epoxy resins also have a small disadvantage – they are prone to yellowing, especially in environments with strong UV rays, which can seriously affect the aesthetics of the coating. So, scientists developed an additive specifically used to inhibit yellowing – an epoxy resin anti-yellowing agent. Its appearance has made epoxy resin truly a “all-round player” in the anti-corrosion industry.

Next, we will explore in-depth the specific application of epoxy resin anti-yellowing agent in ship manufacturing, including its working principle, product parameters, and domestic and foreign research progress. I hope this article will give you a more comprehensive understanding of this field, and at the same time you can feel the charm of the combination of science and technology.

2. Basic principles of epoxy resin anti-yellowing agent

To understand the mechanism of action of epoxy resin anti-yellowing agent, we need to first understand why epoxy resins have yellowing. Simply put, yellowing is caused by chemical reactions in certain components in epoxy resin under light conditions. This process is like a naughty child scribbling on the wall, and the originally white walls become mottled. So, how can we stop this “naughty little guy”?

2.1 Analysis of the causes of yellowing

The main component of epoxy resin is bisphenol A type epoxy resin, which is a compound containing an aromatic ring structure. When it is exposed to ultraviolet light, the aromatic ring will undergo a photooxidation reaction, creating a series of colored substances, such as quinones or carbonyl compounds. These compounds are like dyes,Epoxy gradually appears in yellow or brown colors. In addition, humidity and high temperatures will also accelerate this process, causing the coating on the surface of the ship to lose its original luster faster.

2.2 Working mechanism of anti-yellowing agent

To combat this unpopular yellowing phenomenon, scientists have designed a variety of types of anti-yellowing agents. They work in the following ways:

  • Absorb UV rays: Some anti-yellowing agents can absorb UV rays and convert them into heat energy to release them, thereby avoiding the influence of epoxy resins from ultraviolet rays. This type of substance is often called UV absorbers.
  • Quen free radicals: UV irradiation can cause the epoxy resin molecular chain to break and form free radicals. Anti-yellowing agents can interrupt the chain reaction by capturing these free radicals and prevent further degradation.
  • Stable aromatic ring structure: There are also some anti-yellowing agents that can interact with aromatic rings in epoxy resins, enhance their stability and reduce the probability of photooxidation reactions.

In short, anti-yellowing agent is like a conscientious security guard, always protecting the safety of epoxy resin to ensure that it is not harmed by external factors.

3. Product parameters of epoxy resin anti-yellowing agent

The performance of epoxy anti-yellowing agents of different brands and models may vary, but they usually contain the following key parameters. The following is a comparison table of technical indicators for several common anti-yellowing agents:

parameter name Unit Model A Model B Model C
Appearance —— Light yellow liquid Colorless transparent liquid White Powder
Density g/cm³ 1.05 1.10 0.85
Thermal Stability ? >200 >220 >180
UV absorption efficiency % 95 98 93
Free radical quenching capability mol/mol 1.2 1.5 1.0
Additional value (recommended value) wt% 0.5~1.0 0.8~1.2 0.3~0.6

It can be seen from the above table that different anti-yellowing agents have their own emphasis on various properties. For example, although Model B is relatively expensive, its UV absorption efficiency and radical quenching ability are better than the other two models, so it is more suitable for scenarios with higher anti-corrosion requirements.

IV. Practical application of epoxy resin anti-yellowing agent in ship manufacturing

4.1 Composition of ship anticorrosion coating

In the process of ship manufacturing, the anticorrosion coating is generally composed of three layers of primer, intermediate paint and topcoat. Among them, epoxy resin is often used as the main raw material for primer and intermediate paint, while anti-yellowing agent is mainly used to improve the weather resistance of topcoats. By reasonably matching paints with different functions, all-round protection can be achieved.

  • Primer: It is mainly responsible for improving the adhesion between the coating and the substrate and isolating moisture penetration.
  • Intermediate paint: plays a role in connecting the upper and lower, increasing the overall coating thickness, and improving impact resistance.
  • Pretcoat: Directly exposed to the external environment, it requires excellent weather resistance and decorative properties. At this time, the effect of the anti-yellowing agent is particularly prominent.

4.2 Typical case analysis

Take a large container ship as an example, its hull adopts a three-layer composite coating system, and the specific formula is as follows:

Hydraft Main Ingredients Add ratio (wt%) Function Description
Primary Epoxy 70 Providing basic adhesion and waterproofing
Intermediate Paint Glass Scale Filler 30 Enhanced barrier effect
Pretcoat Polyurethane modified epoxy resin 60 Improving weather resistance and wear resistance
Anti-yellowing agent (model C) 0.5 Improve the anti-aging properties of topcoats

After actual testing, the coating system maintained a good appearance after five consecutive years of use, and there was no obvious yellowing or peeling.

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

5.1 Domestic research progress

In recent years, my country has achieved remarkable results in the field of epoxy resin anti-yellowing agents. For example, a research institute of the Chinese Academy of Sciences successfully developed a new nano-scale anti-yellowing agent with a particle size of only a few dozen nanometers and can be evenly dispersed in an epoxy resin matrix, greatly improving the performance of the product. In addition, many domestic companies have successively launched independently developed anti-yellowing agent products, gradually narrowing the gap with the international leading level.

5.2 International Frontier Trends

In foreign countries, European and American countries have always been at the forefront of the research and development of epoxy resin anti-yellowing agents. They not only pay attention to the performance optimization of the materials themselves, but also actively explore green production channels. For example, a German company launched an anti-yellowing agent based on biodegradable raw materials, which not only ensures functionality but also reduces the impact on the environment. At the same time, Japanese researchers are committed to developing intelligent coating systems to monitor the coating status by embedded sensors and promptly warning of potential problems.

5.3 Future development direction

Looking forward, the research on epoxy resin anti-yellowing agents will develop in the following directions:

  1. Multi-function integration: Combining anti-yellowing function with other characteristics (such as antibacterial, self-cleaning, etc.) to create a more comprehensive solution.
  2. Environmental Sustainability: Use renewable resources as raw materials to reduce carbon emissions during the production process.
  3. Intelligent upgrade: Use big data and artificial intelligence technology to optimize coating design and construction technology.

6. Conclusion: Technology helps the blue dream

With the rapid development of the global shipping industry, the importance of ship anti-corrosion technology is becoming increasingly prominent. Epoxy resin anti-yellowing agents, as one of the core technologies in this field, are constantly promoting the industry’s progress. I believe that in the near future, we will see more innovative achievements emerging to protect mankind’s dream of exploring the ocean.

After, let us summarize the full text in one sentence: If the ship is a giant sailing on the sea, then the epoxy resin anti-yellowing agent is the endless battle robe on this giant!

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