| 摘要 |
NEW MATERIAL:A compound of formula I (R<1> is substituted or unsubstituted monovalent hydrocarbon; R<2>-R<5> is H, substituted or unsubstituted monovalent hydrocarbon; m is 2, 3). EXAMPLE:The compound of formula II. USE:A curing component in a cold-curable organopolysiloxane composition. PREPARATION:The addition reaction between an alpha,beta-unsaturated ester of formula III such as methyl acrylate or methacrylate and an alkenyloxysilane of formula IV containing H bonding to Si (namely, SiH bond) such as a compound of formula IV is carried out in the presence of a rhodium compound such as ClRh(PPh3)3 (Ph is phenyl), preferably at 70-90 deg.C.
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