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Adhesion promoters

  • US 5,342,867 A
  • Filed: 09/30/1993
  • Issued: 08/30/1994
  • Est. Priority Date: 10/06/1992
  • Status: Expired due to Term
First Claim
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1. An adhesive composition comprising a polyurethane resin and, as adhesion promoter, a compound of formula I:

  • ##STR23## in which Z is an organic radical which is derived from an aliphatic, aromatic or heterocyclic polyisocyanate containing m+n isocyanate groups;

    m is a value greater than or equal to 1;

    n is a value greater than or equal to 0;

    m+n is a value greater than or equal to 2;

    Y is O or S;

    X is O, S or N--C1 -C4 alkyl;

    R1 is C1 -C8 alkylene;

    R2 is C1 -C4 alkyl or two groups R2 together for m a C1 -C4 alkylene residue;

    R3 is C1 -C4 alkyl or phenyl; and

    q is a value from 0 to 2.

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