发明名称 |
Liquid polyisocyanate compositions |
摘要 |
A method for the preparation of a liquid diphenylmethane diisocyanate composition which comprises reacting one molar proportion of substantially pure 4,4'-diphenylmethane diisocyanate, as hereinbefore defined, with from 0.01 to 0.8 molar proportions of a monoalkoxy polyalkylene glycol of the formula: <IMAGE> wherein R represents an alkyl group containing from 1 to 12 carbon atoms, R1 represents hydrogen or an alkyl group containing from 1 to 3 carbon atoms and n is an integer of from 2 to 58, the reaction being performed at a temperature of from 100 DEG to 250 DEG C. and in the presence of a catalyst for the NCO/OH reaction. The liquid diisocyanate compositions are useful in the manufacture of polyurethanes, especially elastomers and flexible foams.
|
申请公布号 |
US4386032(A) |
申请公布日期 |
1983.05.31 |
申请号 |
US19810253261 |
申请日期 |
1981.04.13 |
申请人 |
IMPERIAL CHEMICAL INDUSTRIES LIMITED |
发明人 |
HUGHES, JEFFREY;KEANE, KEVIN E. |
分类号 |
C07C265/12;C08G18/28;C08G18/80;(IPC1-7):C07C119/04 |
主分类号 |
C07C265/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|