发明名称 |
Polyhydroxyalkane/aromatic diamine chain extenders. |
摘要 |
<p>Blends of 90-99 mol % of a polyhydroxyalkane containing 2-6 carbons and 2-3 hydroxyl groups and 1-10 mol % of an aromatic diamine having a pKb value greater than 11.3 are useful as chain extenders for polyurethanes derived from diphenylmethanediisocyanate (MDI) prepolymers. Their use overcomes the sensitivity to stoichiometry common to MDI prepolymer/polyhydroxyalkane systems and leads to the formation of cast elastomers having better green strength and a shorter demold time. The preferred blends are blends of 1,4-butanediol and di(alkylthio)toluenediamines.</p> |
申请公布号 |
EP0329821(A2) |
申请公布日期 |
1989.08.30 |
申请号 |
EP19880113706 |
申请日期 |
1988.08.23 |
申请人 |
ETHYL CORPORATION |
发明人 |
PRESSWOOD, JOHN KENNETH;SIMON, JAMES H.;NALEPA, CHRISTOPHER JOHN |
分类号 |
C08G18/10;C08G18/32 |
主分类号 |
C08G18/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|