发明名称 |
Cycloaliphatic thermoplastic polyurethane elastomers |
摘要 |
A process for the preparation of a polyurethane-urea elastomer having a mole ratio of NCO groups to all active hydrogen atoms in the range of 0.9 to 1.2 is disclosed. The process comprise reacting (A), (B) and (C.2) for form an NCO-containing prepolymer and then reacting said prepolymer with (C.1) and (D). Accordingly (A) is 5-isocyanato-1-(isocyanatomethyl)-1,1,3-trimethylcyclohexane or bis-(4-isocyanatocyclohexyl)-methane,(B) is polytetrahydrofuran or hexanediol polycarbonate and (C.2) is a chain extender. (C.1) is 5-amino-3-amino-methyl-1,3,3-trimethylcyclohexane or bis-(4-aminocyclohexyl)-methane and (D) is a molecular weight regulator. The elastomer thus produced is particularly suitable for the preparation of moldings, films, flexible tubing (for medical purposes) and catheters.
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申请公布号 |
US5942593(A) |
申请公布日期 |
1999.08.24 |
申请号 |
US19970805840 |
申请日期 |
1997.03.03 |
申请人 |
BAYER AKTIENGESELLSCHAFT |
发明人 |
PUDLEINER, HEINZ;DHEIN, ROLF;HUGL, HERBERT;MUELLER, HANNS-PETER;HEIDINGSFELD, HERBERT;HOPPE, HANS-GEORG |
分类号 |
B29D99/00;A61L29/06;B29K75/00;C08G18/10;C08G18/12;C08G18/42;C08G18/44;C08G18/48;C08G18/65;C08G18/66;C08G18/73;C08G18/75;(IPC1-7):C08G18/44 |
主分类号 |
B29D99/00 |
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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