Reactive hot melt systems containing isocyanate groups

Details Reactive hot melt systems containing isocyanate groups Reactive hot melt systems containing isocyanate groups

C - Chemistry, Metallurgy

08

G

C08G 18/30 (2006.01) C08G 18/10 (2006.01) C08G 18/18 (2006.01) C08G 18/42 (2006.01) C08G 18/76 (2006.01) C09J 175/06 (2006.01)

Patent

CA 2154243

Reactive hot melt systems containing isocyanate groups, based on hydroxypolyols containing ester and/or ether groupings with a hydroxyl number of 15 to 150 and an average functionality of 1.95 to 2.2, and diphenylmethane diisocyanates, with a ratio of isocyanate groups in the diphenylmethane diisocyanates to hydroxyl group in the polyols of 1.4:1 to 2.5:1, which have a content of at least 70 weight % of 2,4'-diphenylmethane diisocyanate, are characterized by a low initial viscosity and enhanced temperature stability and are suitable as solid adhesives for very different areas of use.

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