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Aromatic polycarbodiimide crosslinkers

  • US 5,574,083 A
  • Filed: 04/29/1994
  • Issued: 11/12/1996
  • Est. Priority Date: 06/11/1993
  • Status: Expired due to Term
First Claim
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1. A stabilized composition comprising an aqueous dispersion of an aromatic polycarbodiimide having the formula of either


  • space="preserve" listing-type="equation">E--O--{--Z--O--}.sub.m --C(O)N(A)--[--R--N═

    C═

    O--].sub.n --R'"'"'--N(A)C(O)--{--O--Z'"'"'--}.sub.p --O--E'"'"'
or


space="preserve" listing-type="equation">E--O--{--Z--O--}.sub.m --C(O)N(A)--[(--R--N═

C═

O--).sub.q --R'"'"'--N(A)C(O)--B--C(O)N(A)--].sub.t --R"--N(A)C(O)--{--O--Z'"'"'--}.sub.p --O--E'"'"'wherein m is an integer of from 5 to 10;

n is an integer of from 2 to 7;

p is an integer of from 5 to 10;

q is an integer of from 1 to 5 and t is an integer of from 1 to 5, wherein the product of q and t is from 4 to 10;

A is hydrogen;

B is a group which does not contain carbodiimide groups;

E and E'"'"' are CH3 ;

R, R'"'"', and R" are independently selected from arylene, alkyl-substituted arylene, biarylene alkylene, or alkyl-substituted biarylene alkylene; and

Z and Z'"'"' are C1 -C6 alkyl groups; and

a stabilizer in an amount effective to enhance the stability of said polycarbodiimide, wherein said stabilizer is selected from the group consisting of hindered phenols, hindered nitroxyls, and mixtures thereof.

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