| 摘要 |
A metal-coupling composition composed of silane cross-linking and coupli ng agents wherein the coupling agent includes a vinyl moiety. The coupling composition is a replacement for iron-phosphatizing / chromate primering and chromate primering in zinc phosphatizing processes. In a preferred embodimen t, the silane cross-linking agent has the following formula: <IMG> and X is a trivalent group, each Y is independently a divalent group or seri es of divalent groups, each Q is independently -R or -OR and each R is independent ly a C1-10 alkyl group or aryl group, and -OR group(s) are hydrolysable; and the silane coupling agent has the following formula: <IMG> each Q is independently -R or -OR and each R is independently a C1-10 alkyl group or aryl group, and -OR group(s) are hydrolysable;
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