Rohm and Haas patents

August 11, 2005

Rohm and Haas patents
Hot melt adhesive
Patent No. U.S. 6,579,406 B2
Rohm and Haas Company has received a patent for a moisture reactive hot melt adhesive composition formed by admixing components comprising a polyisocyanate, an amorphous polyol and 0.1 to 10%, by weight based on the weight of the adhesive composition, styrene/allyl alcohol copolymer having a hydroxyl number of 100-300 and Mn of 1,000-4,000, wherein the ratio of NCO/OH groups of the components on an equivalents basis is from 1.05 to 2.5. The components are free from crystalline polyesters and polyethers and the components containing less than one percent, by weight based on the total weight of the components, water.