发明名称 |
Process for obtaining aminopolyamide-epichlorohydrin resins with a 1,3-dichloro-2-propanol content which is undetectable by ordinary means of vapor-phase chromatography |
摘要 |
A process for obtaining aminopolyamide-epichlorohydrin resins with a 1,3-dichloro-2-propanol content which is undetectable by ordinary means of vapor-phase chromatography. The process consists of passing the products resulting from the successive condensation of aminopolyamides and epichlorohydrin through two columns of activated carbon. In this way, aqueous resins are obtained which are free of toxic products, and which are particularly valuable as wet strength additives in the manufacture of papers for medical, cosmetic or food contact uses.
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申请公布号 |
US6342580(B1) |
申请公布日期 |
2002.01.29 |
申请号 |
US20000495928 |
申请日期 |
2000.02.02 |
申请人 |
ATOFINA |
发明人 |
LAURENT HENRI;DREYFUS THIERRY;POULET CHANTAL;QUILLET SERGE |
分类号 |
C08G69/48;C08G73/02;D21H17/55;D21H21/20;G03C1/79;(IPC1-7):C08F6/00;C08K3/04 |
主分类号 |
C08G69/48 |
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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