Abstract: The present invention is directed to a low viscosity, high tensile strength adhesive of the hot melt pressure sensitive type composition comprising:(a) from about 15 to about 30% by weight of an A-B-A block or A-B-A-B-A-B- multi-block copolymer containing from about 35 to about 55 parts styrene per 100 parts polymer where polymer blocks A are styrene blocks and polymer blocks B are butadiene or hydrogenated butadiene;(b) 70 to about 85% by weight to a composition tackifying resin; and(c) 0.1 to about 1.5% by weight of a stabilizer. Because the adhesive of the present invention has low viscosity and high tensile strength at both high and low temperatures, the adhesive formulation of the present invention is particularly well-suited to disposable diaper construction, hinge binding in books, PET bottle labeling, and attaching base cups to PET beverage bottles.

Abstract: The present invention relates to an improvement in the alpha-amylase method of hydrolyzing a heated slurry of raw starch into starch fragments, the improvement comprising adding a hydrolytically effective amount of the enzyme, glucoamylase, to the reaction slurry.The present invention further relates to a method for the production of high solids dextrim adhesives from raw starch. In carrying out the invention, an aqueous slurry containing raw starch is subjected to hydrolysis at an elevated temperature by the action of two thermally stable enzymes, alpha-amylase and glucoamylase. Once the viscosity of the reaction slurry is reduced to 1000-2000 centipoise as determined by a Brookfield viscometer at 20 rpm, 100.degree. F., and at 45-55% solids (approximately 2.5 hrs.), the enzymes are then inactivated and the reaction is complete. The rheological properties of the resulting slurry can be adjusted as needed.