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Process and composition for promoting hydrosilylation reactions using sterically hindered nitrogen-containing and phosphorus-containing compounds

  • US 5,191,103 A
  • Filed: 12/30/1991
  • Issued: 03/02/1993
  • Est. Priority Date: 12/30/1991
  • Status: Expired due to Term
First Claim
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1. A process for carrying out a platinum catalyzed hydrosilylation reaction between an SiH-containing material and a terminal olefin, comprising:

  • heating said SiH-containing material and said olefin in the presence of a platinum catalyst and a promoter, said promoter comprising;

    a hindered amine or phosphine, or acid salt thereof, containing at least 6 carbon atoms and having the formula ##STR6## Q is N or P;

    when Q is N, R is H, alkyl of 1-18 carbon atoms, nonterminal alkenyl of 4-18 carbon atoms, arylalkyl of 7-25 carbon atoms, or a derivative thereof;

    when Q is P, R is alkyl of 1-18 carbon atoms, non-terminal alkenyl of 4-18 carbon atoms, arylalkyl of 7-25 carbon atoms, or a derivative thereof;

    x is 0 or 1;

    R'"'"' is alkyl of 1-18 carbon atoms, nonterminal alkenyl of 4-18 carbon atoms, arylalkyl of 7-25 carbon atoms, or a derivative thereof;

    y is 0, 1, or 2;

    R" is a branched group having a 2°

    or 3°

    carbon atom bonded directly to Q, and is alkyl of 3-18 carbon atoms, nonterminal alkenyl of 4-18 carbon atoms, arylalkyl of 7-25 carbon atoms, or a derivative thereof;

    z is 1, 2, or 3 and z=3-x-y; and

    two R'"'"' groups, two R" groups, or one R'"'"' and one R" may be taken together to constitute a divalent moiety forming a 5-7 membered ring containing a Q atom.

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