Low-temperature storage stable liquid diphenylmethane diisocyanates
AssigneeMobay Chemical Corporation
InventorsHelmut F. Reiff, Richard S. Pantone
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Abstract
The instant invention is directed to novel low temperature, storage stable liquid diphenylmethane diisocyanates and to the method of their preparation. The diisocyanates of the instant invention are provided by reacting diphenylmethane diisocyanates having a specified 2,4'-isomer content with polyoxyethylene glycols having molecular weights of from 150 to 1500. It has been surprisingly found that the products of the instant invention are both stable and liquid at -5.degree. C for at least 48 hours. In fact, in many instances, the products of the instant invention show no tendency to crystallize even when stored at -22.degree. C for 100 hours.
Claims18
A diisocyanate compound which is both stable and liquid at -5.degree. C for at least 48 hours, comprising the reaction product of:
- (a) a diphenylmethane diisocyanate containing at least 20 percent by weight of the 2,4'-isomer, and
- (b) a polyoxyethylene glycol having a molecular weight of from 150 to 1500.
A process for the production of diisocyanate compounds which are both stable and liquid at -5.degree. C for at least 48 hours which comprises reacting:
- (a) a diphenylmethane diisocyanate containing at least 20 percent by weight of the 2,4'-isomer, and
- (b) a polyoxyethylene glycol having a molecular weight of from 150 to 1500.
Dependencies are inferred from the claim text.