Process for the production of urethane-modified...

Details Process for the production of urethane-modified... Process for the production of urethane-modified...

C - Chemistry, Metallurgy

08

G

400/111, 402/133

C08G 18/10 (2006.01) C08G 18/48 (2006.01) C08G 18/80 (2006.01)

Patent

CA 1233293

A PROCESS FOR THE PRODUCTION OF URETHANE-MODIFIED POLYISOCYANATE PREPARATIONS ABSTRACT OF THE DISCLOSURE Urethane-modified polyisocyanates having an NCO-content of from 5 to 45 wt. % are made by reacting an organic polyisocyanate or mixture of polyisocyanates having an NCO-content of from 30 to 50 wt. % with an organic polyhydroxyl compound or mixtures of poly- hydroxyl compounds. The organic polyhydroxyl compound must include at least 10 hydroxyl equivalent percent of an alkoxylation product of a bisphenol corresponding to a specified formula containing two alcoholic hydroxyl groups and having an OH number of from 112 to 389. The reactants are employed in quantities such that the NCO:OH equivalent ratio is from 2:1 to 50:1. The urethane-modified polyisocyanates of the present invention are particularly useful in the production of polyurethanes by the isocyanate polyaddition process.

471966

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