Liquid diphenylmethane diisocyanate compositions

Details Liquid diphenylmethane diisocyanate compositions Liquid diphenylmethane diisocyanate compositions

C - Chemistry, Metallurgy

07

C

260/455.4

C07C 271/20 (2006.01) C08G 18/80 (2006.01)

Patent

CA 1315800

ABSTRACT LIQUID DIPHENYLMETHANE DIISOCYANATE COMPOSITIONS The present invention is directed to a process for the production of an isocyanate which is both stable and liquid at 25°C comprising reacting i) diphenylmethane diisocyanate, ii) an organic material containing two or more hydroxy groups, said organic material forming a product solid at 25°C when reacted with diphenylmethane diisocyanate in an amount such that the resultant solid product would have an isocyanate group content of from 10 to 30% by weight, and iii) from 1 to 6% by weight, based on the combined weight of i), ii) and iii), of tripropylene glycol, the amounts of components i), ii) and iii) being such that the resultant product has an isocyanate group content of from about 10 to 30% by weight.

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