Liquid diphenylmethane diisocyanate compositions

Abstract From the Canadian patent

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 …