发明名称 |
Thermoplastic polyurethanes with high glass transition temperatures. |
摘要 |
<p>Disclosed are novel high flexural modulus polyurethane plastics wherein a polyisocyanate and a particular combination of extenders including cycloalkane diol are reacted optionally in the presence of a minor proportion of high molecular weight polyol. The polymers have outstanding resistance to high temperatures thereby expanding their utilities into higher temperature end-use environments than related prior art materials. Certain members of these new polymers are also possessed of outstanding optical clarity which thereby provides a combination of properties heretofore not available in a polyurethane. These polymers are easily melt-fabricated notwithstanding their inherent high temperature properties.</p> |
申请公布号 |
EP0320946(A2) |
申请公布日期 |
1989.06.21 |
申请号 |
EP19880121022 |
申请日期 |
1988.12.15 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
BONK, HENRY W.;CHEN, AUGUSTIN T.;EHRLICH, BENJAMIN S. |
分类号 |
C08G18/32;C08G18/65;C08G18/66;C08L75/04 |
主分类号 |
C08G18/32 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|