Diphenylmethane diisocyanate-based liquid polyisocyanate...

Details Diphenylmethane diisocyanate-based liquid polyisocyanate... Diphenylmethane diisocyanate-based liquid polyisocyanate...

C - Chemistry, Metallurgy

08

G

403/41, 260/455.

C08G 18/79 (2006.01) C08G 18/10 (2006.01) C08G 18/48 (2006.01) C08G 18/76 (2006.01)

Patent

CA 1204121

DIPHENYLMETHANE DIISOCYANATE-BASED LIQUID POLYISOCYANATE MIXTURES CONTAINING URETHANE GROUPS, PROCESS FOR THEIR PREPARATION AND THEIR USE FOR THE PREPRATION OF FLEXIBLE POLYURETHANE FOAMS Abstract of the Disclosure Diphenylmethane diisocyanate-based liquid polyisocya- nate mixtures containing urethane groups and having an isocya- nate content of from 12 to 30 percent by weight are obtained by reaction of a polyoxypropylene polyoxyethylene polyol con- taining 5 to 30 percent by weight of oxyethylene with diphenyl- methane diisocyanate-based isocyanates. These polyisocyanate mixtures are storage stable at low temperature and yield flexible polyurethane foams having improved mechanical prop- erties.

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