Patent ID: 6156820
Filing Date: 2000-12-05
Classification: C08G,C09J

Abstract:
A solution of a hot melt adhesive comprising(I) an organic solvent; and(II) a fully imidized polyamideimidesiloxane which comprises the reaction product of dianhydride monomer with diamine monomer, where(A) about 0.5 to about 30 mole % of said monomers contain siloxane groups and are siloxane dianhydrides having the general formula ##STR4## or siloxane diamines having the general formula ##STR5## or mixtures thereof, where R, R.sub.1, and R.sub.2 are mono, di, and triradicals, respectively, each independently selected from a substituted or unsubstituted 1 to 12 carbon atom aliphatic group or a substituted or unsubstituted 6 to 10 carbon atom aromatic group, and m is 1 to 200;(B) up to about 50 mole %, based on said diamine monomer, of aliphatic diamine that contains neither siloxane groups nor amide linkages; and(C) about 40 to about 99 mole %, based on said diamine monomer, of aromatic diamine that does not contain siloxane groups, selected from the group consisting of(1) about 50 to about 100 mole %, based on said aromatic diamine, of unsymmetrical aromatic diamine that has at least two aromatic rings, two amine groups on different aromatic rings, and contains at least one amide linkage in its chain; and(2) up to about 50 mole %, based on said aromatic diamine, of aromatic diamine that contains neither siloxane groups nor amide linkages.