Adhesive and polymer for adhesives

Abstract

It has been discovered that block copolymers comprising at least two polymer blocks containing a vinyl aromatic hydrocarbon monomer contributed units and at least one polymer block conjugated diene monomer contributed units exhibit desirable adhesive properties. The vinyl aromatic hydrocarbon content [S] of the instant block copolymers is 25% to 60% by weight and the vinyl content of the conjugated diene portion [V] is 30% to 70%. The relationship between the vinyl aromatic hydrocarbon content [S] and the vinyl content of the conjugated diene portion [V] satisfies the formula: 75≦[S]+[V]≦100. According to the instant invention, adhesive compositions may be prepared which contain about 10% to about 50% of the block copolymers, about 20% to about 80% of a compatible tackifying resin; about 10% to about 40% of a platicizing oil; about 0.2% to about 2.5% of various stabilizers and 0% to about 10% of a compatible wax.

Dependencies are inferred from the claim text.