Antioxidant KY-405: a high-quality anti-aging protective additive for polymer materials

In the production and use of polymer materials, rubber, plastics, and polyurethane products, external factors such as heat, oxygen, ultraviolet radiation, and ozone can easily cause oxidative aging of materials, leading to cracking, discoloration, decreased mechanical properties, and shortened service life of the products. Antioxidant KY-405, as a high-performance, low-pollution, non-toxic, and odorless aromatic amine antioxidant, has become a core protective additive in the fields of high-end elastomers, plastics, adhesives, and lubricants, widely adapting to the anti-aging needs of various high-end polymer materials, thanks to its excellent heat resistance, light resistance, and ozone agig resistance.

1. Basic physical and chemical parameters of the product

The chemical name of antioxidant KY-405 is 4,4'-bis(α,α-dimethylbenzyl)diphenylamine, also known as p,p'-diisopropylbenzenediphenylamine. Its CAS number is 10081-67-1, molecular formula is C₃₀H₃₁N, and molecular weight is 405.58. The product model "405" is derived from its molecular weight value, making it a highly recognizable and specialized antioxidant additive in the industry.The product appears as white crystalline powder or granules, with stable physicochemical properties. The melting point of the pure product can reach 100-101℃, and its thermal decomposition temperature is as high as 280℃, indicating excellent high-temperature stability. Its density is 1.061±0.06g/cm³, boiling point is 535.2℃ (760mmHg), and flash point is 292℃. In terms of solubility, it is easily soluble in organic solvents such as acetone, ethyl acetate, and toluene, slightly soluble in gasoline, alcohol, and methanol, and completely insoluble in water. It is compatible with various polymer material processing systems and is not prone to precipitation and loss. The heating loss of industrial-grade qualified products is ≤0.2%, with extremely low impurity content. Its purity and stability meet the standards for high-end industrial production.

II. Core product features and advantages

Compared to traditional common antioxidants, KY-405 exhibits outstanding comprehensive performance, circumventing the shortcomings of traditional additives such as susceptibility to contamination, volatility, poor heat resistance, and impact on product color. Its core advantages are quite significant.

1. Low volatility and high-lasting protection: KY-405 is a high molecular weight antioxidant with a stable molecular structure and extremely low volatility. It is not prone to migration, volatilization, or loss during high-temperature processing and long-term use, providing long-lasting antiaging protection for products and effectively extending the service life of materials. It is suitable for industrial products that undergo high-temperature molding and long-term service.

2. Nontoxic, odorless, low pollution, and nondiscoloring: As a lightcolored, environmentally friendly antioxidant, this product is odorless and has extremely low toxicity, meeting the safety standards for use in food packaging and civilian products. Unlike ordinary amine antioxidants, it has minimal pollution and will not cause yellowing or staining of products after addition. It can be used in highend lightcolored products such as colored rubber and transparent plastics, without affecting the appearance and color stability of the product.

3. Multiantiaging performance: It can simultaneously resist thermaloxidative aging, ultraviolet aging, and ozone aging, comprehensively addressing the aging and failure issues of polymer materials during processing, storage, and use. Especially, its protective effect against material aging in hightemperature and lightexposed environments is particularly prominent.

4. Strong processing adaptability: The product exhibits excellent dispersibility and can be directly added to solid rubber and plastic melts without affecting the vulcanization characteristics of rubber or the molding performance of plastic. It is compatible with mainstream polymer material processing techniques, requiring no adjustment to existing production parameters, and demonstrating extremely strong adaptability.

5. Excellent synergistic effect: When used in combination with sulfurcontaining antioxidants and auxiliary antioxidants, it can produce a significant synergistic effect, greatly improving the overall antiaging effect, reducing the amount of single auxiliary agent added, lowering production costs, and enhancing the comprehensive quality of the product.

In addition, KY405's antioxidant performance is comparable to that of imported highend products such as Naugard 445 from the United States and Nocrac CD from Japan. It offers comparable performance at a higher costeffectiveness ratio, making it an excellent domestic alternative to imported additives.

III. Wide range of application areas

With its characteristics of safety and environmental friendliness, comprehensive performance, and wide adaptability, KY405 is widely used in various industries such as rubber, plastics, polyurethane, and fine chemicals, making it a highly versatile and high-end antioxidant additive.

1. Rubber products field: compatible with natural rubber, styrenebutadiene rubber, butadiene rubber, isoprene rubber, chloroprene rubber, hydrogenated nitrile rubber, ethylene acrylate rubber, and other types of synthetic rubber. Primarily used in products such as tires, hoses, belts, rubber shoes, cable sheaths, rubber seals, and shock absorbers, it can effectively prevent rubber cracking, hardening, and aging, enhancing the weather resistance and service life of the products. It is especially suitable for highend lightcolored rubber products such as chloroprene rubber colored cable sheaths.

2. Plastics and color masterbatch fields: It can be used for the antioxidant protection of generalpurpose plastics such as polyethylene, polypropylene, and polyvinyl chloride, as well as various types of plastic color masterbatch. It inhibits hightemperature oxidation during plastic processing, light aging for outdoor use, and prevents plastic brittleness, fading, and mechanical degradation.

3. Polyurethane material field: specifically used for polyether polyol, polyurethane foam, and polyurethane elastomer, addressing the issues of yellowing, aging, and pulverization of polyurethane materials under longterm exposure to light and high temperature environments. It is a specialized antiaging additive for polyurethane products.

4. Other fine chemical fields: It can be used as an environmentally friendly antioxidant for food packaging materials, highend adhesives, and coatings, which is safe, nontoxic, and does not pollute the substrate. It can also be used for the antioxidant modification of industrial lubricants and hydraulic oils, delaying the oxidative deterioration of the oils and extending their service life.

IV. Usage and storage specifications

In terms of usage, KY405 can be directly mixed and added according to product requirements. The conventional addition amount is 0.1%-1.0%, which can be appropriately adjusted according to the type of material, usage scenario, and aging requirements. It is more effective when used in combination with auxiliary antioxidants such as thioesters and phosphites.

In terms of storage, the product is packaged in standard 25kg/barrel and should be stored in a dry, cool, and ventilated warehouse, away from sources of fire and heat. It should be protected from direct sunlight and humid environments to prevent moisture absorption and agglomeration. Under normal sealed storage conditions, the product exhibits excellent stability and has a long shelf life. It should be used as soon as possible after opening to avoid longterm exposure that may affect its performance. During transportation, it is classified as an ordinary chemical product with no special transportation restrictions, making it safe and convenient to transport.

V. Product Summary

Antioxidant KY405 breaks through the pain points of traditional antioxidants, such as single performance, strong pollution, and poor hightemperature resistance. It combines multiple advantages such as environmental safety, low volatility, longterm protection, high and low temperature resistance, excellent weatherability, and wide adaptability. It can not only meet the stability requirements of hightemperature processing for industrial products but also ensure the antiaging performance of end products under longterm outdoor and complex working conditions. As a highquality domestically produced alternative to imported highend antioxidants, KY405 has become an indispensable core antiaging additive in the rubber, plastic, polyurethane, and fine chemical industries due to its high costeffectiveness and stable performance. In the development trend of lightweight, longlasting, and environmentally friendly highend materials, it has broad application prospects and market value.