CAS NO.-96-1
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Performance:
TMQ is a general quinoline antioxidant with excellent heat and oxidative aging resistance performance in the rubber industry. It has strong heat, oxidation and aging resistance performance. TMQ has low volatility and low pollution in vulcanized rubber products.
Application:
TMQ is widely used in all kinds of tires, rubber tubes, rubber belts, rubber shoes, rubber cloth products and other general industrial rubber products, and can also be used for latex products.
CAS NO.101-72-4
Performance:
IPPD is an outstanding antioxidant and antiozonant, which exhibits strong anti-ozone, anti-fatigue and anti-bending performance. It's oxidation resistance performance is better than that of quinolone and amine antioxidants. IPPD has a certain protective effect on the catalytic oxidation of copper, manganese and other variable-valent metals.
Application:
IPPD is suitable for the formulations of natural rubber and synthetic rubber, as well as for conveyor belts, rubber tubes, cables, etc., rubber products that need dynamic and static oxidation and ozone resistance protection. IPPD can be applied to rubber products with lower requirements for discoloration.
CAS NO.793-24-8
Performance:
6PPD is an outstanding antioxidant and antiozonant, which exhibits strong anti-ozone, anti-fatigue and anti-bending performance. Its's comprehensive aging resistance performance is better than that of quinolone and amine antioxidants. 6PPD has a certain protective effect on the catalytic oxidation of copper, manganese and other variable-valent metals. 6PPD is well compatible with rubber with lower pollution and volatility.
Application:
6PPD is a general antioxidant and antiozonant, which is suitable for the formulations of natural rubber and synthetic rubber. It can be applied to tires, conveyor belts, rubber pipes, cables, etc., and rubber products that need dynamic and static oxidation and ozone resistance protection. 6PPD has a stabhization effect on many solution and emulsion polymers. In the production of styrene monomer, p-methylstyrene, divinylbenzene and acrylate, 6PPD can be used as a polymerization inhibitor.
During long-term storage and use, rubber and its products will gradually become sticky, hard, brittle, or cracked due to the effects of heat, oxygen, ozone, variable valence metal ions, mechanical stress, light, high-energy radiation, as well as other chemical substances and mold erosion. This phenomenon where physical and mechanical properties decrease over time and elasticity decreases is called aging.
As the aging process progresses and develops, the performance of rubber and its products will gradually decrease, leading to complete loss of useful value. To this end, certain chemical substances need to be added to rubber and its products to enhance their resistance to various destructive effects mentioned above, delay or inhibit the aging process, and thus extend the storage and service life of rubber and its products. These substances are called antioxidants.
1. The three products with the highest production of antioxidant
In , the production of antioxidant products reached tons, accounting for 34% of the total production of rubber additives, ranking high among all rubber additive categories. Among all antioxidant products, the production of TMQ, 6PPD, and IPPD is the largest, with TMQ, 6PPD, and IPPD accounting for 80% of antioxidant products, making them the mainstream varieties of antioxidants.
◆ Anti aging agent TMQ (RD)
It is a type of universal antioxidant with good protection against aging caused by heat and oxygen. It is applied to various tires, rubber hoses, tape, rubber shoes, rubber fabric products, and latex products. It is suitable for producing all steel and semi steel radial tires and is one of the largest production and consumption varieties of antioxidants in the world. The use of antioxidant TMQ in combination with phenylenediamine antioxidant 6PPD and protective wax forms complementary advantages, forming a typical protective system for rubber products. It is the main antioxidant formula in the processing of radial tires. It can inhibit oxidation, thermal aging, and weather aging under harsh conditions, but has poor protection against bending and cracking. The main component of antioxidant TMQ is a polymer of 2,2,4-trimethyl-1,2-dihydroquinoline, and the content of the dimer has a significant impact on its antioxidant properties.
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◆ Antioxidant 6PPD ()
Natural rubber, cis-1,4-polybutadiene rubber, isoprene rubber, styrene butadiene rubber, nitrile rubber, and chloroprene rubber are used as ozone resistant and antioxidant agents. They have excellent resistance to fatigue and ozone cracking, with efficacy ranging from to NA. When used in combination with wax, they increase static protection efficiency and also have good protection against heat, oxygen, copper, and manganese. If the temperature exceeds 35-40 ℃, it will slowly clump. When the dosage exceeds 2.5 parts, it has a slight softening effect on the rubber material, and there is no effect on the mechanical properties of vulcanized rubber below 2.5 parts. When the dosage exceeds 2.5 parts, the tensile strength and elongation decrease. Especially suitable for use with heat-resistant adhesives when combined with antioxidant MB.
◆ Anti aging agent
A universal antioxidant for natural rubber and synthetic rubber latex. Excellent protection against ozone cracking and bending cracking; It is also an excellent protective agent for heat, oxygen, light, and general aging. It can also inhibit the aging effect of variable valence metal ions and has a comprehensive protective performance compared to (CPPD). Under sunlight, it will change color, but it does not affect efficiency. It has a low melting point and is easily dispersed. Its solubility in rubber is higher than 40 10, and its frost resistance is smaller. Therefore, it can increase the dosage and is commonly used in products under high dynamic and static stress conditions. This product can be used alone, and when used in conjunction with antioxidant AW or wax production, it can reduce usage and improve protective effectiveness. It has improved static ozone cracking resistance when used in combination with wax.
2. Antioxidants are divided into 5 categories based on their chemical structure
Amine antioxidants (aldehyde amine antioxidants, ketamine antioxidants, diaryl secondary amines, para phenylenediamines), phenolic antioxidants (divided into mono phenols, bisphenols, and polyphenols), heterocyclic antioxidants, phosphite ester antioxidants, and other types of antioxidants (long-term antioxidants, nickel salts, and waxes).
◆ Aldehyde amine antioxidant. It is a reaction product of fatty aldehydes and primary aromatic amines, and is the oldest category of antioxidants. Aldehydes and amines are effective in aging caused by heat, oxygen, and light. They have good dispersibility in rubber compounds, but are contaminated and are not suitable for light colored products. There are: antioxidant AH and AP.
Ketamine type antioxidants. Has good antioxidant effects. There are: antioxidant RD, antioxidant AW, antioxidant BLE.
Diaryl secondary amine antioxidant. This is one of the ancient varieties that still rank among all antioxidants, including antioxidant D (D), antioxidant A (A), and antioxidant DNP.
◆ Phenylenediamine antioxidant. It includes the most important type of antioxidant and is also a very promising type of antioxidant. There are: antioxidant NA/IPPD, antioxidant /6PPD, antioxidant /CPPD, antioxidant ODA, antioxidant DPPD, antioxidant 7PPD, antioxidant 8PPD, antioxidant /DTPD, antioxidant 445.
The protective effect of phenolic antioxidants and other antioxidants is not as good as that of amine antioxidants, but they have outstanding non polluting properties, such as antioxidant , antioxidant BHT (264), antioxidant SP, and antioxidant BHA.
◆ Heterocyclic antioxidants (sulfur containing types), including antioxidant MB, antioxidant MMB, antioxidant MBZ, and antioxidant MMBZ. Antioxidant MB is an important type of non polluting antioxidant.
◆ Phosphite antioxidant, including TNP antioxidant. Phosphite esters are hydrogen peroxide decomposers and free radical scavengers that act as auxiliary antioxidants in polymer systems. They are often used in combination with hindered phenols and are rarely used alone.
◆ Long acting antioxidant. When rubber products are used in high temperature and vacuum environments, the antioxidant in rubber will decrease or lose its protective effect due to volatilization. For example, if rubber products are used in contact with liquid media for a long time, they may decrease or lose their protective effectiveness due to rapid extraction. Non volatile or low volatile, non extractable or low extractable antioxidants developed for this purpose, according to currently publicly available products include nitroso diphenylamine (NDPA), allyl substituted phenols (TAP), etc.
◆ Nickel salt antioxidant (sulfur containing type), including: antioxidant NDBC, antioxidant NDIBC, and antioxidant NDMC. All are green powders, which have the best ozone protection performance and also have protective effects on thermal oxygen aging and fatigue aging.
◆ Wax type antioxidant, when its dosage in rubber exceeds its solubility in rubber, migrates to the surface after vulcanization, forming a protective film that can effectively prevent static ozone cracking of products, including paraffin and microcrystalline wax.
Newly developed antioxidant. Tributylurea derivatives, lactam derivatives, non flexing (anti flexing) LAS (LAS-P) for styrene substituted diphenylamine or 4,4 '- stilbene substituted diphenylamine, diisopropylphenyl substituted DPPD (DP), sulfide triazine derivatives, 6-QDI, Durazone37, and other types.
Henan Rongxinxin Technology Co. , Ltd. is an experienced manufacturer of rubber auxiliaries.
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