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Compound antioxidant: Technical support for high-performance coatings with stronger antioxidant capabilities

3月 15th, 2025 News

Composite antioxidant: Technical support for high-performance coatings with stronger antioxidant capabilities

1. Preface

In today’s competitive paint market, a product must have unique performance advantages to stand out. In this era of “appearance and strength coexist”, paints not only need a beautiful appearance, but also need strong inner quality to support its long-term use value. Just like an elegant gentleman, he must not only dress appropriately, but also have deep connotations and lasting charm. The key to this is the complex chemical reactions and substance interactions inside the paint.

As time goes by, various components in the paint will inevitably undergo oxidation reactions. This natural process is like the color change of fruits after being cut open in our daily lives. Although it is inevitable, it can be controlled through scientific methods. Compound antioxidants play such an important role. They are like the “guardian” in the paint system, and through the synergy of multiple mechanisms, they effectively delay and inhibit the occurrence and development of the oxidation process.

This article will deeply explore the application principles and technical characteristics of composite antioxidants in high-performance coatings, and analyze how they provide stronger antioxidant capabilities for the coating through unique formula design and process optimization. At the same time, we will combine actual cases to show the performance of composite antioxidants in different application scenarios and how to choose the appropriate antioxidant system according to specific needs. Through these contents, we hope to help readers fully understand the mechanism of action of composite antioxidants and their important position in the modern coating industry.

2. Basic principles and classification of composite antioxidants

The reason why composite antioxidants can effectively protect the coating system from oxidative damage is mainly due to their carefully designed multiple mechanisms of action. First, let’s understand what oxidation reaction is. Simply put, oxidation is the process of chemical reaction between substances and oxygen. In coating systems, this reaction may lead to a series of problems such as color changes, increased viscosity, and decreased mechanical properties. Compound antioxidants are like a well-trained fire brigade, taking targeted measures at different stages of the fire (oxidation reaction).

From the perspective of mechanism of action, compound antioxidants are mainly divided into the following categories:

  1. Free radical capture antioxidants
    The main function of these antioxidants is to capture free radicals generated during oxidation and prevent them from triggering chain reactions. Common representatives are phenolic compounds and amine compounds. They are like snipers on the battlefield, specifically targeting dangerous elements that may trigger a chain reaction.

  2. Peroxide decomposition antioxidants
    When free radical reactions form peroxides, such antioxidants will work, decomposing the peroxide into more stable products, thereby preventing further oxidation reactions. Thiodicarboxylic acid esters and sub-Phosphate is a typical example in this regard. Their working style is like bomb disposal experts in chemical reactions, eliminating potential explosion hazards in a timely manner.

  3. Metal ion passivator
    Certain metal ions will accelerate the oxidation reaction, while metal ion passivators can bind to these harmful metal ions and reduce their catalytic activity. Chelating agents are the leader in this field. Their role is equivalent to a safety protection net, effectively isolating the influence of risk factors.

  4. Auxiliary antioxidants
    This type of antioxidant does not directly participate in the antioxidant reaction itself, but can enhance the overall antioxidant effect by regenerating the main antioxidant. Natural products such as vitamin E fall into this category. They are more like logistics support forces, providing continuous support to the main forces in front-line operations.

To understand the characteristics of these different types of antioxidants more intuitively, we can refer to the following table:

Antioxidant Types Main Ingredients Function characteristics Application Scenario
Radical Capture Type Phenols, amines Catch free radicals General-purpose coatings
Peroxide decomposition Thiodicarboxylic acid esters, phosphite esters Decomposition of peroxides High temperature environment
Metal ion passivator Chalking agent Binding metal ions Metal Surface Coating
Auxiliary antioxidants Vitamin E, etc. Regenerate main antioxidant Natural Materials

It is worth noting that a single type of antioxidant often struggles to meet the needs of complex coating systems. Therefore, compound antioxidants have emerged. They can achieve better antioxidant effects by reasonably combining different types of antioxidants. This combination is like a multi-army synthesized force, each performing its own duties and cooperating with each other to jointly maintain the stability and durability of the coating system.

3. Current application status of composite antioxidants in high-performance coatings

With the rapid development of the coating industry, the application of composite antioxidants has also shown a trend of diversification and specialization. At present, a variety of composite antioxidant products for specific purposes have been developed on the market. These products have not only significantly improved performance, but also have environmental protection andImportant breakthroughs have also been made in terms of economy. The following are several typical composite antioxidant products and their application characteristics:

  1. Irganox series composite antioxidants
    As a world-renowned antioxidant brand, the Irganox series products are favored for their excellent performance and wide applicability. For example, the Irganox 1076/168 compound system is suitable for polyurethane coatings, with good thermal stability (high temperatures up to 200?) and excellent processing safety. This product is especially suitable for automotive coatings and industrial protective coatings, which can effectively extend the service life of the coating.

  2. Ultranox series composite antioxidants
    The Ultranox series is based on brominated flame retardants, and has excellent antioxidant properties. Among them, Ultranox 626/HP-136 composite system is particularly suitable for electronic and electrical coatings. It not only has good oxidation resistance, but also provides additional flame retardant protection. The recommended amount of addition is usually between 0.1% and 0.5%, and the specific amount must be adjusted according to the coating formula.

  3. Songnox series composite antioxidants
    Songnox series composite antioxidants are mainly phenolic antioxidants, supplemented by auxiliary antioxidants, forming a unique synergistic effect. For example, Songnox 1010/168 composite system is suitable for powder coatings and coil coatings, with excellent light stability and weather resistance. The main feature of this product is its low volatility and high compatibility, so that it can maintain good performance during high-temperature baking.

In order to better compare the performance parameters of these products, we have compiled the following table:

Product Model Using temperature range (?) Recommended addition (%) Feature Description Applicable fields
Irganox 1076/168 -30~200 0.1~0.3 Good thermal stability and safe processing Automotive coatings, industrial protective coatings
Ultranox 626/HP-136 -40~150 0.2~0.5 It has flame retardant function Electronic and electrical coatings
Songnox 1010/168 -20~220 0.15~0.4 Low volatilization, high compatibility Powder coating, coil coating

From domestic and foreign research literature, the development of composite antioxidants is moving towards the following directions: first, to improve the environmental performance of the product and reduce the impact on the environment; second, to develop new high-efficiency antioxidants to improve antioxidant efficiency; second, to optimize compounding technology to achieve better synergistic effects; later, to expand new application fields to meet the needs of different industries.

IV. Selection and optimization strategies for compound antioxidants

In practical applications, choosing the right composite antioxidant is not easy, and it requires a comprehensive consideration of multiple factors. First of all, we must clarify the specific use environment and requirements of the target coating. For example, architectural coatings used outdoors need to pay special attention to weather resistance and UV protection, while interior decorative coatings pay more attention to odor control and environmental protection performance. This is like choosing furniture for different rooms, which must meet functional needs and be both beautiful and comfortable.

Next, we need to consider other ingredients in the coating formula. Some pigments or fillers may adversely react with specific types of antioxidants, resulting in a degradation in performance. This is similar to paying attention to the combination of ingredients when cooking to avoid unpleasant tastes. For example, iron-containing pigments may accelerate the decomposition of certain phenolic antioxidants, and at this time, it is necessary to choose a composite antioxidant with good metal ion passivation ability.

After determining the basic plan, experimental verification is also necessary to optimize the specific addition amount and compounding ratio. It’s like making a cocktail, and although you know the general formula, you still need to try it repeatedly to find a good taste. It is usually recommended to use step-incremental testing to record the performance change curves under different addition amounts, and finally determine the appropriate dosage range.

In addition, cost-effective balance should be taken into account. Although high-performance composite antioxidants can bring better protection, they may lose their market competitiveness if they exceed the reasonable economic tolerance. This is like buying luxury goods, you need to pursue quality while taking into account cost-effectiveness. Generally speaking, the following steps can be used to optimize the selection:

  1. Clear key performance indicators: determine which performances need to be guaranteed first.
  2. Preliminary screening of candidate products: List possible composite antioxidants based on experience and literature.
  3. Laboratory evaluation: Evaluate the actual effect of each candidate product through small-scale experiments.
  4. Process adaptability test: Check whether the selected antioxidant will affect the existing production process.
  5. Cost accounting: comprehensively consider the cost and usage effect of raw materials, choose a cost-effective solution.

For ease of understanding and operation, we have summarized the following selection flowchart:

Step Key Considerations FAQ Solution Strategy
Environmental Assessment Usage conditions, exposure to risks How to judge the requirements? Refer to similar product data
Ingredient Analysis Compatibility, interaction How to avoid conflicts? Compare compatibility test
Experimental Verification Add amount, compound ratio The data is not accurate enough? Increase the number of repetitions
Cost Accounting Cost-performance ratio, long-term benefits How to weigh the investment? Calculate the full life cycle cost

The above systematic method can help paint manufacturers to select and optimize composite antioxidant solutions more scientifically to ensure that the performance and economy of the final product are balanced.

V. Future development trends of composite antioxidants

With the continuous progress of the coating industry, the research and development of composite antioxidants is also developing towards a more intelligent and green direction. Future composite antioxidants will no longer be limited to simple chemical combinations, but will develop into multifunctional systems with intelligent response characteristics. For example, researchers are developing adaptive composite antioxidants that can automatically adjust antioxidant capacity according to environmental conditions. This innovative “smart pill” product can always maintain excellent protection under different operating conditions.

In terms of environmental protection performance, significant progress has been made in the research of biomass composite antioxidants. By synthesising new antioxidants by utilizing renewable resources, not only reduces dependence on fossil raw materials, but also reduces carbon emissions during the production process. Some natural antioxidants based on plant extracts have been successfully applied to aqueous coating systems, showing good application prospects. It is expected that the market share of this type of environmentally friendly composite antioxidant will increase significantly in the next decade.

The application of nanotechnology has also brought revolutionary changes to composite antioxidants. By loading the antioxidant active ingredient onto the nanocarrier, its dispersion and utilization can be significantly improved. This “micro warehouse”-style structural design allows antioxidants to be released accurately when needed, thus achieving a more efficient protection effect. At the same time, this technology also helps to reduce the overall use of composite antioxidants, further reducing costs and environmental impacts.

ValueIt must be mentioned that big data and artificial intelligence technologies have also begun to be introduced into the research and development of composite antioxidants. By establishing a huge database and intelligent algorithm model, R&D personnel can quickly filter out the best complex solutions and predict their performance in different application scenarios. This “smart brain”-style R&D model has greatly shortened the development cycle of new products and improved the efficiency of technological innovation.

VI. Conclusion

Compound antioxidants are an indispensable component of high-performance coatings, as important as the human immune system is to health. A complete antioxidant system can not only effectively delay the aging process of the paint, but also provide it with all-round protection to ensure that it maintains a good condition throughout its life cycle. As an old proverb says: “Only by planning ahead can you stay calm in the face of danger.” Compound antioxidants are the reliable “protective umbrella” in the paint system.

Looking forward, with the advancement of technology and changes in market demand, compound antioxidants will surely make more breakthroughs in performance improvement, green environmental protection and intelligent applications. Whether it is to deal with extreme environmental challenges or meet special functional needs, composite antioxidants will continue to play an indispensable role in the coatings industry with their unique charm. Let us look forward to witnessing the birth of more exciting achievements in this journey of technological innovation.

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Effective strategies for compound antioxidants to reduce odor during production

3月 15th, 2025 News

Compound antioxidants: “odor scavenger” in the production process

In the modern chemical industry, composite antioxidants have become an indispensable chemical additive. It is like an unknown hero behind the scenes, playing a crucial role in the production of plastics, rubbers and other polymer materials. Imagine that without the presence of composite antioxidants, our production environment could become as suffocating as a landfill. These magical small molecules can not only effectively delay the aging of materials, but also significantly reduce the odor generated during the production process, thus creating a more comfortable working and living environment for factory employees and surrounding residents.

So, what are compound antioxidants? Simply put, this is a chemical preparation composed of a variety of antioxidant ingredients. They are like “special forces” in the chemistry world, each with unique skills, but only in solidarity and collaboration can we complete complex tasks. In practical applications, composite antioxidants can effectively prevent oxidative degradation of polymer materials during high-temperature processing or long-term storage by inhibiting the generation and propagation of free radicals. This degradation reaction will not only reduce the performance of the product, but will also release a pungent odor, seriously polluting the environment and affecting the quality of the product.

This article will discuss the effective strategies of composite antioxidants to reduce odor during production. We will start from the basic principles of composite antioxidants, deeply explore their specific performance in different application scenarios, and combine research results in domestic and foreign literature to analyze how to maximize their efficacy through scientific selection and rational use. In addition, we will introduce some practical product parameters and comparison data to help readers better understand the practical application value of composite antioxidants. If you are an engineer or researcher interested in the chemical industry, or a friend who just wants to know this field, this article will definitely open your eyes!

Next, let us enter the world of compound antioxidants together and uncover the mystery behind it!

1. Basic knowledge of compound antioxidants

(I) Definition and composition

Compound antioxidant is a mixture of primary antioxidant, secondary antioxidant and other functional additives. Its main function is to prevent or slow down the oxidation reaction of polymer materials during production and use, thereby extending the service life of the material and improving processing performance. The main antioxidants are usually compounds with the ability to capture free radicals, such as phenolic antioxidants; while the auxiliary antioxidants are responsible for decomposing peroxides to prevent them from further triggering chain reactions. Common ones include phosphites and thioesters.

To illustrate this vividly, we can compare compound antioxidants to a relay race. The main antioxidant is the first player, it quickly grasps the free radicals that have just been generated and “uniform” it; the auxiliary antioxidantIt was the second player who took over the former’s results and continued to deal with the peroxides that had already formed to ensure the smooth completion of the entire game. It is this clear model of cooperation that allows composite antioxidants to perform well in complex and variable chemical environments.

(Bi) Classification and Characteristics

Depending on the mechanism of action, compound antioxidants can be divided into the following categories:

  1. Stealed phenolic antioxidants
    This is a common type of main antioxidant with strong free radical capture ability. They break the oxidation chain reaction by binding to free radicals. Typical representatives include BHT (2,6-di-tert-butyl-p-cresol) and CAO-1010 (tris[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol). The advantages of this type of antioxidant are good thermal stability and low volatility, which is very suitable for material protection under high temperature processing conditions.

  2. Phosophite antioxidants
    It is mainly used as a supplementary antioxidant, which can effectively decompose peroxides and prevent them from decomposing and producing more free radicals. Common varieties include TNPP (trinolyphenylphosphite) and DOF (bioctadecylphosphite). This type of antioxidant is characterized by significant synergistic effects, which are better when used with hindered phenolic antioxidants.

  3. Thioester antioxidants
    It is also a supplementary antioxidant, mainly used to decompose peroxides and reduce carbonyl compounds. Typical representatives are DLTP (thiodipropyl dilaurate) and DSTP (thiodipropyl distearate). The advantages of thioester antioxidants are inexpensive and have good compatibility, but may cause slight odor problems in some sensitive materials.

  4. Special functional antioxidants
    With the advancement of technology, some composite antioxidants with special functions have also appeared on the market. For example, formulations containing metal ion passivating agents can effectively prevent catalytic oxidation caused by metal catalyst residues; while formulations containing ultraviolet absorbers can provide additional light stability in outdoor environments.

Category Main Ingredients Functional Features
Stealed phenolic antioxidants BHT, CAO-1010 Catch free radicals, good thermal stability, low volatility
PhosophitesAntioxidants TNPP, DOF Decompose peroxides, and the synergistic effect is significant
Thioester antioxidants DLTP, DSTP Decompose peroxide, low price, good compatibility
Special functional antioxidants Metal ion passivator, UV absorber Provides additional protection features such as anti-metal catalytic oxidation or light stability

(III) Mechanism of action

The mechanism of action of composite antioxidants can be summarized in the following steps:

  1. Free Radical Capture
    Free radicals are generated when polymer materials are affected by heat, light or other external factors. These free radicals trigger chain oxidation reactions, resulting in a decline in material properties. The main antioxidant breaks this reaction chain by combining with free radicals to form a relatively stable product.

  2. Peroxide Decomposition
    During the oxidation process, a large amount of peroxide is often generated. If not processed in time, these peroxides will further decompose to produce new free radicals, aggravate the oxidation reaction. The auxiliary antioxidants prevent the reaction from continuing by decomposing peroxides and converting them into harmless substances.

  3. Synergy Effect
    The reason why complex antioxidants are powerful is that they make full use of the synergies between different components. For example, when hindered phenolic antioxidants and phosphite antioxidants are used in combination, the former is responsible for capturing free radicals, and the latter is responsible for decomposing peroxides. The two complement each other and jointly improve the overall antioxidant performance.

2. Advantages of composite antioxidants in reducing odor

In industrial production, the problem of odor has always been a headache. Whether it is a plastic product processing factory or a rubber manufacturing workshop, the pungent smell in the air not only affects the health of workers, but may also lead to product complaints and even customer churn. Compound antioxidants have shown unique advantages in this regard and can be regarded as a “magic weapon” to solve the problem of odor.

(I) Inhibit oxidative degradation reaction

Plumer materials are prone to oxidation and degradation reactions during processing, which releases a series of volatile organic compounds (VOCs), which are often the main sources of odor. For example, polyethylene (PE) may undergo oxidation and cracking at high temperatures, forming aldehydes, ketones and carboxylic acids, which emit the substances.The smell is unbearable.

Compound antioxidants can significantly reduce the generation of these harmful substances by inhibiting the occurrence of oxidative degradation reactions. Take hindered phenolic antioxidants as an example, which can capture them at the early stages of radical formation, thereby avoiding subsequent chain reactions. This not only reduces the emission of VOCs, but also reduces the risk of yellowing on the surface of the material.

(II) Optimize processing conditions

In addition to directly inhibiting the oxidation reaction, composite antioxidants can also indirectly reduce the generation of odor by optimizing processing conditions. For example, during injection molding, if the melt temperature is too high, the material is prone to local overheating, causing a strong odor. By adding an appropriate amount of composite antioxidant, the heat resistance and flowability of the material can be improved, making the processing process more stable, thereby reducing odor problems caused by overheating.

(III) Enhance product stability

The use of composite antioxidants is particularly important for some products that require long-term storage or exposure to harsh environments. For example, agricultural films are prone to photooxidation reactions under direct sunlight, resulting in an unpleasant odor. By adding composite antioxidants containing ultraviolet absorbers, the aging rate of the material can not only delay the material, but also effectively control the generation of odors.

Application Scenario Common sources of odor Composite antioxidant solutions
Plastic injection molding High temperature oxidation and cleavage to generate VOCs Add hindered phenolic antioxidants and phosphite antioxidants to inhibit oxidation reaction
Rubber vulcanization processing Vulcanized by-products and incomplete reaction monomers Use thioester antioxidants to decompose peroxides and reduce residual substances
Agricultural film Photooxidation reaction produces aldehyde substances Add a composite antioxidant containing ultraviolet absorber to enhance light stability

3. Selection and use strategies for compound antioxidants

Although compound antioxidants are powerful, if they are selected improperly or used incorrectly, they may be counterproductive. Therefore, in practical applications, we need to select the appropriate types of antioxidants according to specific needs and formulate scientific usage plans.

(I) Selection Principle

  1. Select according to material type
    Different types of polymer materials have different requirements for composite antioxidants. For example,Polyolefin materials (such as PE and PP) usually use hindered phenolic antioxidants, supplemented by phosphite antioxidants; while engineering plastics (such as PA and PC) require higher performance composite antioxidants to cope with higher processing temperatures and a more demanding use environment.

  2. Consider processing technology
    Different processing techniques will also affect the choice of composite antioxidants. For example, during the extrusion molding process, due to the large shear force, the material is prone to mechanical degradation, so antioxidants with good shear resistance should be preferred. In the film blowing process, attention is needed to be paid to the influence of antioxidants on the transparency of the film.

  3. Balance cost and performance
    While high-end composite antioxidants can provide better protection, their high prices may increase production costs. Therefore, when selecting a model, you should comprehensively consider the product positioning and market demand and choose a cost-effective solution.

(II) Usage Strategy

  1. Reasonable amount of addition
    The more the compound antioxidant is added, the better. Excessive use may lead to precipitation of antioxidants, affecting the appearance and performance of the product. Generally speaking, the recommended amount of addition is 0.1%~0.5%, and the specific value should be determined based on the experimental results.

  2. Evening dispersion
    The dispersibility of antioxidants has an important influence on their efficacy. If dispersion is uneven, it may lead to lack of protection in local areas, making the material more susceptible to oxidative degradation. Therefore, during the preparation of masterbatches or kneading, it is necessary to ensure that the antioxidant can be fully dispersed into the substrate.

  3. Note compatibility with other additives
    Complex antioxidants often need to be used together with other additives (such as plasticizers, stabilizers, etc.). At this time, attention should be paid to the interaction between the auxiliary agents to avoid adverse consequences due to incompatibility. For example, some halogen-containing flame retardants may react with phosphite-based antioxidants, reducing the latter’s effectiveness.

4. Domestic and foreign research progress and typical case analysis

In recent years, with the enhancement of environmental awareness and the improvement of technical level, the research on composite antioxidants has achieved many breakthrough results. The following will combine typical cases in domestic and foreign literature to demonstrate the practical application effect of composite antioxidants in reducing odor during production.

(I) Foreign research trends

In the United States, DuPont has developed a new composite antioxidant formula that is specifically used in the production of automotive interior parts. This formula usesMulti-layer structure design, in which the inner layer is a high-efficiency radical capture agent and the outer layer is a peroxide decomposition agent. In this way, not only excellent antioxidant properties are achieved, but also greatly reduces odor emissions during processing. Experimental data show that after using this formula, the VOC concentration in the production workshop was reduced by more than 70%, and employee satisfaction was significantly improved.

In Europe, BASF launched a green composite antioxidant product, which is particularly suitable for applications in the food packaging field. This product is based on natural plant extracts and has good biodegradability and safety. After multiple tests and verifications, it can effectively control odor problems during processing without affecting the packaging performance and meet strict food safety regulations.

(II) Domestic research progress

In China, a study by the Institute of Chemistry, Chinese Academy of Sciences shows that by adjusting the proportion of components in composite antioxidants, their stability in high temperature environments can be significantly improved. The researchers found that when the mass ratio of hindered phenolic antioxidants to phosphite antioxidants is 2:1, the overall antioxidant performance of the system reaches an optimal state. Based on this research result, they have successfully developed a composite antioxidant product suitable for high-performance engineering plastics and have been put into industrial production.

In addition, an experiment conducted by Tsinghua University and a well-known company also proved the effectiveness of composite antioxidants in reducing odors during rubber vulcanization. By introducing a specific proportion of thioester antioxidants into the formulation, the generation of vulcanized by-products is not only reduced, but also improved the physical and mechanical properties of the final product. This achievement provides strong support for the green development of my country’s rubber industry.

Research Institutions/Enterprise Core Innovation Points Practical application effect
DuPont (US) Multi-layer structural design, synergistic effect of inner and outer layers VOC concentration is reduced by 70%, employee satisfaction is improved
BASF (Europe) Based on natural plant extracts, focusing on environmental protection and safety Complied with food safety regulations and reduced processing odors
Institute of Chemistry, Chinese Academy of Sciences Optimize the group allocation ratio to improve high temperature stability Reasonably improved antioxidant performance
Tsinghua University Introduce thioester antioxidants to improve the rubber vulcanization process Reduce vulcanized by-products and improve product performance

V. Summaryand prospect

Through the detailed discussion in this article, we can see the important role of compound antioxidants in reducing odor during production. It has shown great potential and value from the perspective of basic theory and practical application. However, we must also recognize that the development of composite antioxidants still faces many challenges, such as how to further improve their environmental performance, reduce costs, and expand their scope of application.

In the future, with the continuous emergence of emerging fields such as nanotechnology and smart materials, the research and development of composite antioxidants will also usher in more opportunities. We look forward to seeing more innovative products coming out and contributing more to the sustainable development of the chemical industry. As the old saying goes, “Technology changes life.” I believe that in the near future, compound antioxidants will become an indispensable tool in the hands of every chemical practitioner, making our world a better place!

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Compound antioxidants: Provide consumers with longer product lifespan

3月 15th, 2025 News

Compound antioxidants: Provide consumers with longer product lifespan

In today’s fast-paced era, whether it is electronic products, automotive parts or daily consumer goods, people have increasingly demanded on product life and durability. Who doesn’t want their phone to be used for more years? Who doesn’t want the plastic products at home to stand the test of time? However, reality is always cruel – the oxidation reaction is like an invisible “hand of time”, quietly eroding the performance of the material and shortening the service life of the product.

In order to fight this inevitable natural phenomenon, scientists invented a magical substance – a composite antioxidant. It is like an invisible guardian, silently protecting various materials around us and extending their “life”. This article will deeply explore the definition, type, mechanism of action and performance of composite antioxidants, and through detailed data and case analysis, help consumers understand how this key technology can improve the durability and economic value of the product.

Next, we will discuss it from the following aspects:

  1. Basic Knowledge of Compound Antioxidants: What are Compound Antioxidants? What types of them are there?
  2. Mechanism of action of composite antioxidants: How does it compete with oxidation reaction?
  3. Composite antioxidants application fields: From plastics to rubber to food packaging, it is everywhere.
  4. Market status and development trends: What changes are the composite antioxidant industry going through globally?
  5. Compound antioxidants from the perspective of consumers: Why is it more meaningful to choose products containing compound antioxidants?

Whether you are a technology enthusiast who is interested in materials science or an ordinary consumer, this article will unveil the mystery of composite antioxidants and let you understand why it is an indispensable part of modern industry.

1. Basic knowledge of compound antioxidants

(I) What is a compound antioxidant?

Composite antioxidant is a chemical additive that synergizes with multiple antioxidant components. It is mainly used to delay or inhibit the degradation process caused by oxidation of materials. Simply put, it is a “preservative”, but its functions are much more than that. Compared with single antioxidants, composite antioxidants can solve multiple problems at the same time, such as thermal stability, light stability, and aging phenomena that may occur during long-term storage.

In nature, oxidation reactions are everywhere. For example, cut apples will gradually change color, and iron tools will produce rust when exposed to the air.These are all the results of oxidation. For industrial materials, oxidation is also an issue that cannot be ignored. When plastics, rubber or other polymers are exposed to oxygen for a long time, the molecular chains will break, causing the material to become brittle, yellow and even lose its original properties. The existence of composite antioxidants is to prevent or slow down the occurrence of this process.

(II) Classification of composite antioxidants

According to their functions and mechanisms of action, compound antioxidants can be divided into the following categories:

Category Description Common Representatives
Main antioxidant Can directly capture free radicals, thereby interrupting the oxidation chain reaction Stealed phenols (such as BHT), amines
Auxiliary Antioxidants Mainly used to decompose peroxides and reduce the consumption of main antioxidants Phosophate (such as TNP), thioesters
Light Stabilizer Prevent oxidation reactions caused by ultraviolet rays Harden amine light stabilizer (HALS), ultraviolet absorber
Metal ion passivator Inhibit the catalytic oxidation reaction of metal ions Phosophites

Each type of antioxidant has its unique advantages and limitations, so in practical applications, they are usually combined to achieve optimal results. This is the origin of the word “compound” – by reasonably matching different types of antioxidants, we can give full play to their respective advantages and form a strong protective barrier.

(III) Development history of composite antioxidants

The history of composite antioxidants can be traced back to the early 20th century, when people began to realize that certain chemicals can delay oil rancidity. With the rise of polymer materials, especially the large-scale production of plastics such as polyethylene and polypropylene, the demand for antioxidant technology is becoming increasingly urgent. By the mid-20th century, scientists gradually realized the shortcomings of single antioxidants and tried to develop more efficient composite formulas.

Now, composite antioxidants have become a highly mature industry and are widely used in many fields such as plastics, rubbers, coatings, and lubricants. According to the Global Antioxidants Market Report (2022), the market is expected to exceed US$8 billion by 2030, with an average annual growth rate of more than 5%. This fully demonstrates that compound antioxidants are in modern societyan important position in the association.

2. The mechanism of action of composite antioxidants

To truly understand the importance of composite antioxidants, we must first understand the basic principles of oxidation reactions. As mentioned earlier, oxidation reactions can lead to a decline in material properties, and composite antioxidants inhibit this reaction through a series of complex chemical processes.

(One) The process of oxidation reaction

Oxidation reactions usually follow a typical chain reaction pattern, consisting of three stages: initiation, propagation and termination.

  1. Initiation stage: Oxygen combines with the active points in the material to generate free radicals.
  2. Propagation stage: Free radicals constantly react with other molecules, producing new free radicals, and forming chain reactions.
  3. Termination phase: Two free radicals bind to each other, or are captured by other substances, thereby stopping the chain reaction.

If this process cannot be terminated in time, the material will be seriously damaged. For example, plastic products may become fragile and brittle, while rubber tires may lose their elasticity.

(II) How do compound antioxidants work?

The main task of composite antioxidants is to interrupt the above-mentioned chain reaction, which can be achieved in the following ways:

  1. Free Radical Scavenger: The main antioxidant (such as hindered phenols) can quickly capture free radicals, converting them into stable compounds, thus preventing the reaction from continuing.
  2. Peroxide Decomposition: Auxiliary antioxidants (such as phosphates) are responsible for decomposing peroxides and reducing the burden on the main antioxidants.
  3. Ultraviolet shielding: Light stabilizers can absorb ultraviolet energy and prevent it from triggering an oxidation reaction.
  4. Metal ion passivation: Some metal ions (such as copper and iron) will accelerate the oxidation process, and metal ion passivation agents can effectively inhibit this catalytic effect.

Through the above mechanism, composite antioxidants can not only delay the aging speed of the material, but also significantly improve their weather resistance and mechanical properties.

(III) Example analysis: Compound antioxidants in plastics

Let’s take polypropylene (PP) as an example to see how composite antioxidants work. Untreated polypropylene is prone to thermal oxidation and degradation under high temperature conditions, which is manifested as yellowing color and decreased intensity. However, after adding an appropriate amount of composite antioxidant, these problems are solved.

Ingredients Function Effect
Stealed Phenols Catch free radicals Stop chain reaction
Phosphate Decomposition of peroxides Reduce by-product accumulation
HALS Absorb UV rays Improving weather resistance

Experiments show that polypropylene products with composite antioxidants can maintain good performance even in extreme environments and can extend their service life by several times.

3. Application fields of composite antioxidants

Composite antioxidants have been widely used in many industries due to their excellent performance. The following are several typical application scenarios:

(I) Plastics Industry

Plastic is one of the common materials in modern life, but due to its own structural characteristics, it is easily affected by oxidation. The addition of composite antioxidants makes plastic products more durable and also reduces production costs.

1. Packaging Materials

Food packaging is one of the common plastic application areas. To ensure food safety and extend the shelf life, many packaging materials are added with composite antioxidants. For example, the composite antioxidants commonly used in PET bottles can effectively prevent oxygen penetration, thereby protecting the contents from contamination.

2. Engineering Plastics

Engineering plastics (such as PCs, PAs) are widely used in automotive parts, electronic equipment and other fields. Since these materials need to withstand higher temperatures and pressures, the requirements for antioxidant properties are particularly stringent. The use of composite antioxidants greatly improves their reliability and service life.

(II) Rubber Industry

Rubber products (such as tires, seals) also face the threat of oxidative aging. By adding composite antioxidants, not only can the rubber be processed, but it can also significantly extend its service time.

1. Tire manufacturing

Tyres are an important part of the car, and their performance directly affects driving safety. Studies have shown that tires containing composite antioxidants are 20%-30% more wear-resistant than ordinary tires and have stronger anti-aging capabilities.

2. Seals

In the fields of aerospace and chemical industry, high-performance seals require extremely high material stability. The introduction of composite antioxidants allows these seals to work for a long time in harsh environments without failure.

(III) Coatings and Inks

The resin components in coatings and inks are also easy to produceOxidation reactions, causing the coating to peel off or fade. The addition of composite antioxidants can effectively avoid these problems and make the coating more lasting and beautiful.

IV. Market status and development trends

In recent years, with the increase in environmental awareness and technological advancement, the composite antioxidant market has shown the following significant characteristics:

  1. Green trend: More and more companies are beginning to pay attention to the environmental protection performance of composite antioxidants, striving to develop products that are harmless to the human body and the environment.
  2. Customized Services: Different industries have different demands for composite antioxidants, so suppliers are increasingly focusing on providing personalized solutions.
  3. Technical Innovation: The research and development of new composite antioxidants is emerging one after another, such as nano-scale antioxidants, bio-based antioxidants, etc., which further broadened their application scope.

According to authoritative institutions, in the next ten years, the Asia-Pacific region will become a fast-growing market for global compound antioxidants, with the main driving force coming from the rapid development of emerging economies such as China and India.

5. Complex antioxidants from the perspective of consumers

For ordinary consumers, although we may not understand the specific components and principles of compound antioxidants, it does have a profound impact on our daily lives. Just imagine, without composite antioxidants, your phone case may have cracked to pieces, your home’s plastic furniture may have turned yellow and deformed, and even the juice sold in supermarkets may deteriorate due to the aging of the packaging materials.

Therefore, when purchasing products, you may wish to pay more attention to whether the use of composite antioxidants is mentioned in the product manual. After all, a carefully designed and optimized product often contains more technological content and humanistic care.

Conclusion

Compound antioxidants are inconspicuous, but they play a crucial role. It not only extends the service life of the product, reduces resource waste, but also creates a more comfortable and convenient living environment for us. As the old saying goes, “Details determine success or failure.” Today, in the pursuit of high-quality life, compound antioxidants are undoubtedly a key detail worthy of our attention and attention.

I hope this article can help you better understand this magical substance and make more wise decisions in future choices. After all, who doesn’t want to have a good product that “longevity”?

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