| 摘要 |
<p>The bond strength between a sulphur-vulcanizable rubber and a metal, especially brass, is increased by using as bonding promoter a compound having the formula R-(CH2)a-S2O3-M+ or a hydrate thereof, where a has an integral value of at least 1, and where (i) M+ represents a sodium ion or an equivalent of a divalent nickel or cobalt ion and R represents hydroxy, cyano, chlorophenyl, fluorophenyl, nitrophenyl, alkoxyphenyl, alkylphenyl, dialkylphenyl, arylphenyl, naphthyl, alkylnaphthyl, benzoyl, phenoxy, halophenoxy, phthalimido, a group having the formula R2CONH-, R2NHCO-, where R2 is an alkyl or aryl radical, +MOOC, or 2,4-dihydroxy-6-pyrimidyl (or its keto-form equivalent) or (ii) M + is absent and R represents a grouping +H3N-.</p> |
