Random copolyester adhesive resins

Claim 1

As a composition of matter a linear random copolyester having an intrinsic viscosity ranging from 0.5 to 1.0 deciliters per gram as determined in a 60/40 by volume mixed solvent system of phenol and tetrachloroethane at 30° C. and suitable for use as a solution adhesive, said copolyester being the polymeric reaction product of a mixture of reactants consisting of (a) ethylene glycol (b) terephthalic acid or a lower C 1 -C 4 dialkyl ester thereof (c) phthalic acid or phthalic anhydride (d) an aliphatic dicarboxylic acid selected from the group consisting of unsubstituted and lower alkyl substituted aliphatic dicarboxylic acids containing from 5 to 12 carbon atoms in the linear chain or lower C 1 -C 4 dialkyl ester thereof in which mixture the amount of terephthalic acid or lower C 1 -C 4 dialkyl ester thereof ranges from 5 to 55 mol percent, the amount of phthalic acid or phthalic anhydride ranges from 5 to 40 mol percent and the amount of aliphatic dicarboxylic acid or lower C 1 -C 4 dialkyl ester thereof ranges from 5 to 65 mol percent, all percentages being based on the total mols of the acid constituents or reactive equivalents thereof in said mixture.