Acrylic modified reactive urethane hot melt adhesive...

Details Acrylic modified reactive urethane hot melt adhesive... Acrylic modified reactive urethane hot melt adhesive...

C - Chemistry, Metallurgy

09

J

400/5506

C09J 175/04 (2006.01) C08F 8/30 (2006.01) C08F 283/00 (2006.01) C08G 18/10 (2006.01) C08L 75/04 (2006.01) C09J 5/06 (2006.01) C08G 18/63 (2006.01)

Patent

CA 1337093

The addition to urethane prepolymers of low molecular weight polymers formed from ethylenically unsaturated monomers which do not contain active hydrogen provides a hot melt adhesive which can be readily coated at a viscosity of 3000 to 50,000 cps. at 120°C Thermosel without the need for additional tackifiers or plasticizers and which has improved initial cohesive strength as well as improved strength after aging of the cured bond. In a preferred embodiment of the invention, the ethylenically unsaturated monomers are polymerized in the non-isocyanate containing components of the isocyanate terminated prepolymer.

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