Use of polyisocyanates containing ester groups as hot melt...

Details Use of polyisocyanates containing ester groups as hot melt... Use of polyisocyanates containing ester groups as hot melt...

B - Operations, Transporting

32

B

B32B 7/12 (2006.01) C08G 18/30 (2006.01) C08G 18/77 (2006.01) C09J 179/00 (2006.01)

Patent

CA 2048989

Mo-3627 LeA 27,855 THE USE OF POLYISOCYANATES CONTAINING ESTER GROUPS AS HOT MELT ADHESIVE OR FOR THE PREPARATION OF A HOT MELT ADHESIVE ABSTRACT OF THE INVENTION Disclosed herein is a process for bonding substrates comprising applying a hot-melt adhesive to the surface of at least one of the substrates and contacting the surface of said substrate with the surface of the other substrate, said adhesive containing an ester group-containing polyisocyanate which is a solid below 30°C and liquid above 100°C, corresponding to formula (I) A(OCO-B-NCO)n (I) in which n stands for a whole number or a fraction (statistical average) of from 2 to 6, A stands for an n-valent organic group such as is obtained by removal of hydroxyl groups from an n-valent polyhydroxyl compound in the molecular weight (Mn) range of from 800 to 6000 containing ester and/or carbonate groups and B stands for an aliphatic, cycloaliphatic or aromatic hydrocarbon group having up to 18 carbon atoms. Mo3627

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