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Cluster acrylic silicones having cyclic clusters

  • US 4,760,122 A
  • Filed: 01/06/1986
  • Issued: 07/26/1988
  • Est. Priority Date: 06/22/1984
  • Status: Expired due to Term
First Claim
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1. A polyorganosiloxane polymer having a structure represented by one of the formulas:

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    space="preserve" listing-type="equation">(AB).sub.m C or [(AB).sub.m ].sub.n SiR.sub.(4-n)where A is a cyclic diorganosiloxane moiety comprising between 4 and 8 siloxane repeat units, including a plurality of units of the formula ##STR15## where R1 is H or lower alkyl, X is O, NH or S, and Y is a divalent linking group;

    B is an organosiloxane segment represented by the formula;

    ##STR16## C is A or triorganosilyl group;

    the R groups are the same or different organo groups other than acrylic groups or groups co-curable therewith;

    m is an integer of 1 or more;

    n is 3 or 4; and

    x is an integer of at least 100.

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