| 摘要 |
Antidegradants for rubber comprising a mixture consisting essentially of 2,2,4-trimethyl-1,2-dihydroquinoline monomer, dimer thereof and more highly polymerized products than the said dimer, the contents of the said quinoline monomer and the said quinoline dimer being less than 5% by weight and 25% by weight or more, respectively. The antidegradants for rubber are very useful for preventing both heat ageing and flex cracking of rubber.
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