发明名称 |
Polyurethanes prepared with tetrahydrofuran-alkylene oxide polymerizates having low oligomeric cyclic ether content |
摘要 |
The resistance to degradation on exposure to high temperatures, water and organic liquids of a polyurethane prepared by reacting a tetrahydrofuran/alkylene oxide polymerizate, an organic polyisocyanate and a chain extender is significantly improved by using a tetrahydrofuran/alkylene oxide polymerizate which contains no more than about 3%, by weight, of oligomeric cyclic ethers.
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申请公布号 |
US4224432(A) |
申请公布日期 |
1980.09.23 |
申请号 |
US19780966602 |
申请日期 |
1978.12.11 |
申请人 |
E. I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
PECHHOLD, ENGELBERT;ROBINSON, IVAN M. |
分类号 |
C08G18/48;(IPC1-7):C08G18/48 |
主分类号 |
C08G18/48 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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