Patent ID: 6136944
Filing Date: 2000-10-24
Classification: C08L,C09D,C09J

Abstract:
A flexible industrial adhesive composition which bonds thermoplastic polymer substrates and substrates having low stiffness, to materials selected from the group consisting of metals, fabrics, rubbers, engineered materials and concrete, said flexible industrial adhesive composition comprising:(a) one or more epoxy resin(s) having an average of at least 1.5 epoxy groups per molecule;(b) a liquid amine terminated polyamide prepared by reacting at least one C.sub.18-50 dicarboxylic acid or dicarboxylic acid halide with an aminoalkylpiperazine in a ratio of moles of aminoalkylpiperaze to equivalents of carboxyl group in the acid of greater than 0.75:1; wherein the aminoalkylpiperazine is of the formula: ##STR6## where R.sup.1 is hydrogen and R.sup.2 is --R.sup.3 --NH.sub.2, wherein R.sup.3 is a divalent aliphatic with optional --CHR.sup.4 -- or --CR.sup.4 R.sup.5 -- units, wherein R.sup.4 and R.sup.5 are independently alkyl groups;(c) one or more polyamine(s); and(d) optionally one or more filler(s);wherein the molar ratio of the epoxy resin to said liquid amine terminated polyamide is from about 3:1 to 1:3, the tensile modulus of the final composition is less than 500,000 psi and the tensile elongation of the final composition is greater than 10%.