In 2016, the production of antioxidants reached 375,000 tons, accounting for 34% of the total output of rubber additives, ranking first among all rubber additives. The antioxidants TMQ, 6PPD and IPPD are the largest among all anti-aging agents. Among them, anti-aging agents TMQ, 6PPD and IPPD account for 80% of anti-aging agents, which are the mainstream varieties of anti-aging agents.
1.Antioxidant TMQ (RD)
It is a general-purpose anti-aging agent with excellent anti-aging effect caused by heat and oxygen. It is widely used in various tires, hoses, tapes, rubber shoes, tape products and latex products, especially for the production of all-steel and semi-steel radial tires. It is one of the most widely used varieties of global antioxidants. Antioxidant TMQ is used in combination with p-phenylenediamine anti-aging agent 6PPD and protective wax to form a complementary protection system. It constitutes the typical protection system for rubber products and is the most important antioxidant formula in the processing of radial tires. It can inhibit the harsh conditions of oxidation, heat aging and weathering, but it has a poor effect on flex cracking. The main component of the antioxidant TMQ is a polymer of 2,2,4-trimethyl-1,2-dihydroquinoline, in which the dimer content has the most significant effect on the oxidation resistance.
2.Antioxidant 6PPD (4020)
Natural rubber, butadiene rubber, isoprene rubber, styrene butadiene rubber, nitrile rubber, antiozonants and antioxidants for neoprene, excellent for fatigue and ozone cracking, with effectiveness between 4010 and 4010NA If used together with wax, it increases static protection efficiency and has good protection against heat, oxygen, copper and manganese. When the temperature exceeds 35~40 °C, it will gradually form agglomerates. When the dosage is more than 2.5 parts, the rubber compound has slight softening effect, and the mechanical properties of less than 2.5 parts of the vulcanized rubber have no effect, and the tensile strength and the tensile strength decrease. It is especially suitable for use with anti-aging agent MB and heat-resistant rubber compound.
3.Antioxidant IPPD (4010NA)
A general-purpose anti-aging agent for natural rubber and synthetic rubber latex. It has excellent protection against ozone cracking and flex cracking; it is also an excellent protective agent for heat, oxygen, light and general aging. It also inhibits the aging of variable-valent metal ions, and its protective performance is more comprehensive than 4010 (CPPD). It will change color under sunlight, but it will not affect the performance, the melting point is low, easy to disperse, the solubility in rubber is larger than 4010, and the frosting is smaller, so it can be used up. It is often used under the conditions of high dynamic and static stress. product. This product can be used alone, and the anti-aging agent AW or wax can reduce the dosage and improve the protection efficiency. In particular, it is used in combination with wax to improve the level of anti-static ozone cracking performance.