Acrylate- or methacrylate-functional organopolysiloxanes

  • US 5,091,440 A
  • Filed: 12/08/1989
  • Issued: 02/25/1992
  • Est. Priority Date: 12/08/1989
  • Status: Expired due to Term
First Claim
Patent Images

1. Acrylate- or methacrylate-functional organopolysiloxane compositions containing an organopolysiloxane of the formula ##STR13## wherein R is a radical selected from the group consisting of monovalent hydrocarbon radicals having from 1 to 20 carbon atoms, substituted monovalent hydrocarbon radicals having from 1 to 20 carbon atoms, monovalent hydrocarbonoxy radicals having from 1 to 20 carbon atoms and a radical of the formula ##STR14## wherein at least one R is a radical of formula (I), R1 is selected from the group consisting of hydrogen and a methyl radical, R2 is selected from the group consisting of a multivalent hydrocarbonoxy radical and a multivalent hydrocarbonoxy radical containing non-terminal atoms selected from the group consisting of oxygen, and nitrogen atoms, R3 is selected from the group consisting of a divalent hydrocarbon radical and a divalent hydrocarbonoxy radical, a is a number having an average value of from 0.7 to 2.6, b is a number of from 1 to 5, and x is a number of from 2 to 200;

  • said acrylate- or methacrylate-functional organopolysiloxane compositions are obtained by reacting a mercapto-functional compound selected from the group consisting of mercaptofunctional monohydric alcohols, mercapto-functional polyhydric alcohols, mercapto-functional monohydric alcohols containing non-terminal atoms selected from the group consisting of oxygen and nitrogen atoms and mercapto-functional polyhydric alcohols containing non-terminal atoms selected from the group consisting of oxygen and nitrogen atoms with organopolysiloxanes containing vinyl or allyl groups and thereafter the result product is reacted with an acid or ester thereof selected from the group consisting of an acrylic and methacrylic acid in the presence of a free radical initiator.

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