发明名称 |
PREPOLYMER CATALYSTS SUITABLE FOR PREPARING SPANDEX FIBERS |
摘要 |
Segmented polyurethane/ureas useful for the production of spandex, particularly spandex fibers, are made from isocyanate- terminated prepolymers formed by reacting excess isocyanate with an isocyanate-reactive component satisfying specified compositional requirements in the presence of a catalyst which promotes linear polymerization but does not cause degradation of the polymer. Suitable catalysts include metal salts of organic fatty acids and/or of naphthenic acid. The isocyanate-reactive component includes at least 10 equivalent percent of a polyoxypropylene diol having a number average molecular weight of at least about 1500 Da and an average unsaturation level less than or equal to 0.03 meq/g and up to 90 equivalent percent of a polytetramethylene glycol having a number average molecular weight of at least 200 Da.
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申请公布号 |
CA2430043(A1) |
申请公布日期 |
2003.11.30 |
申请号 |
CA20032430043 |
申请日期 |
2003.05.26 |
申请人 |
BAYER CORPORATION;BAYER AKTIENGESELLSCHAFT |
发明人 |
LAWREY, BRUCE D.;GROSS, THOMAS A.J.;MEYER, ROLF-VOLKER |
分类号 |
C08G18/65;C08G18/08;C08G18/12;C08G18/22;C08G18/48;D01F6/70;(IPC1-7):C08G18/76;D01F8/00;C08F2/06;C08G18/10;C08G18/16;C08G18/32 |
主分类号 |
C08G18/65 |
代理机构 |
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代理人 |
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地址 |
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