Patent ID: 6433069
Filing Date: 2002-08-13
Classification: C08L,C09J,Y10T

Abstract:
A hot melt pressure sensitive adhesive comprising:a. from about 5% to about 30% by weight of the adhesive of at least one block copolymer having styrene end-blocks and ethylene/butylene or ethylene/propylene mid-blocks and having a diblock content of greater than 35%, a coupling efficiency of less than about 50%, a melt index greater than about 20 grams/10 minutes, and a styrene content of from about 10 wt-% to about 30 wt-%, b. from about 5% to about 50% by weight of the adhesive of at least one block copolymer having styrene end-blocks, a coupling efficiency from about 65% to about 100%; from about 10% to about 40% by weight of the adhesive of a liquid plasticizing oil; and c. from about 20% to about 60% by weight of the adhesive of a tackifying resin, said adhesive has a 180Â° peel to stainless steel of less than about 2.0 pounds per linear inch (about 360 g/cm) and exhibits minimal staining to paper.