High temperature polyurethane-urea structural adhesives

Details High temperature polyurethane-urea structural adhesives High temperature polyurethane-urea structural adhesives

C - Chemistry, Metallurgy

08

G

C08G 18/65 (2006.01) C08G 18/79 (2006.01) C09J 5/06 (2006.01) C09J 175/04 (2006.01)

Patent

CA 2163401

The present invention encompasses a polyurethane-urea composition comprising: A) a polyphenyl polymethylene polyisocyanate (polymeric MDI) component having an isocyanate content of greater than 30 to less than 33.6%; B) an isocyanate reactive component containing: (1) a primary amine, or a mixture of primary amines, and (2) at least two different polyols (i) and (ii) wherein: (i) is a polyol having a molecular weight of 400 to 8000, and (ii) is a lower molecular weight diol; of a molecular weight of 62 to 399.

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