| 摘要 |
The compounds are of the class of thiobis(beta-aryl-alkylene)diphenols and chain-extended polythiopoly-phenols derived therefrom. They are useful as anti-oxidants in compositions containing unsaturated rubbers - that is, so-called diene rubbers. A typical compound of the class is 4,4'-thiobis(beta-phenyl-ehtylene)diphenol, made by condensing bis(beta-chloro-phenethyl)sulfide (1 mole) with phenol (2 moles). Chain extension is apt to occur by reaction of the first-formed mono-thio diphenol with additional amounts of the dichloro coupling agent and the starting phenol, forming polythio polyphenolic compounds having repeated alternating units of the coupler and the the phenol moieties. |
