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Terminal cluster vinyl silicones and acrylate cluster silicones therefrom

  • US 4,728,709 A
  • Filed: 03/10/1986
  • Issued: 03/01/1988
  • Est. Priority Date: 06/30/1983
  • Status: Expired due to Term
First Claim
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1. A polyorganosiloxane polymer having terminal vinyl clusters represented by the formula


  • space="preserve" listing-type="equation">(DB).sub.m C.sup.1 or [(DB).sub.m ].sub.n SiR.sub.(4-n)/2
where the R groups are the same or different organic groups other than acrylic groups or groups co-curable therewith;

B is a polyorganosiloxane segment represented by the formula ##STR12## where x is an integer of at least 100;

C1 is D or a triorganosilyl group;

m is an integer of 1 or more;

n is 3 or 4; and

D is a linear polyorganosiloxane segment containing between 3 and about 50 siloxane repeat units at least 3 of which contain pendant alkenyl or alkynyl groups.

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