发明名称 |
FIBRAS DE POLIESTERES MODIFICADAS CON CARBO DIIMIDAS Y PROCEDIMIENTO PARA SU FABRICACION |
摘要 |
Polyester fibres and filaments which have carboxyl end groups protected by reaction with carbodiimides are described, in which - the protection of the carboxyl end groups has mainly been carried out by reaction with mono- and/or biscarbodiimides which are contained in the fibres and filaments in free form only in an amount from 30 to 200 ppm, relative to the weight of the polyester, - the content of free carboxyl end groups is less than 3 meq/kg of polyester and - at least a further 0.02% by weight of at least one free polycarbodiimide or a reaction product with still reactive carbodiimide groups are contained in the fibres and filaments, and a process for their preparation. The filaments described are particularly suitable for the preparation of paper machine screens. |
申请公布号 |
MX9201124(A) |
申请公布日期 |
1992.10.30 |
申请号 |
MX19920001124 |
申请日期 |
1992.03.13 |
申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
DR. GOTTFRIED WICK;DR. ERHARD KRUEGER;HERBERT ZEITLER |
分类号 |
C08G63/685;C08G63/46;C08G63/91;D01F1/10;D01F6/62;D01F6/92;D21F1/10;(IPC1-7):C08L79/08 |
主分类号 |
C08G63/685 |
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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