Liquid diphenylmethane diisocyanate compositions

Details Liquid diphenylmethane diisocyanate compositions Liquid diphenylmethane diisocyanate compositions

C - Chemistry, Metallurgy

08

G

260/455.4

C08G 18/80 (2006.01)

Patent

CA 1216855

LIQUID DIPHENYLMETHANE DIISOCYANATE COMPOSITIONS ABSTRACT OF THE DISCLOSURE The present invention is directed to a liquid, diphenylmethane diisocyanate composition having an isocyanate functionality of greater than 2.0 and having an isocyanate group content of from about 20 to about 30 percent by weight prepared by reacting: (a) diphenylmethane diisocyanate with (b) a mixture of (i) from about 5 to about 20 equivalent percent of a monohydroxy alcohol, (ii) from about 25 to about 35 equivalent percent of a poly-1,2- molecular weight of from 134 to 700, and (iii) from about 45 to about 65 equivalent percent of a trihydroxy alcohol selected from the group consisting of trimethylolpropane, triethylolpropane, glycerin and 1,3,6-hexane triol, the total equivalent percent of (i), (ii) and (iii) being 100, the weight ratio of (a) to (b) being from 5:1 to 15:1.

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