发明名称 |
Process for the preparation of copolymers |
摘要 |
Process for the preparation of copolymers from acrylamide and acrylic or methacrylic acid, wherein to prepare 100 parts by weight of the copolymer, (A) 10-90 parts by weight of acrylamide, (B) 90-100 parts by weight of acrylic acid and/or methacrylic acid or of a salt thereof, (C) 0-40 parts by weight of another copolymerizable monomer and (D) 0-5 parts by weight of a copolymerizable crosslinking agent which has two or more olefinic double bonds are polymerized in an alcohol having 1-4 carbon atoms by precipitation polymerization such that 10-90% by weight of the alcohol, 10-90% by weight of the total amount of monomers (A), (B) and (C) together with 100% by weight of the crosslinker substance are initially mixed, polymerization is started with 10-100% by weight of the initiator and then the remainder of the solvent, monomers, crosslinking agent and initiator to make up to 100% is metered in, as individual components or as a mixture, after the polymerization has started.
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申请公布号 |
US4722958(A) |
申请公布日期 |
1988.02.02 |
申请号 |
US19870008261 |
申请日期 |
1987.01.29 |
申请人 |
CASSELLA AKTIENGESELLSCHAFT |
发明人 |
SAUER, JOSEF;ENGELHARDT, FRIEDRICH;RABAS, KERSTINE;KARSUNKY, ULRICH;SCHIDLO, WOLFRAM;QUACK, JOCHEN M.;RENG, ALWIN K.;SKRYPZAK, WERNER |
分类号 |
C08F220/00;A61K8/81;A61K9/06;A61K47/32;A61Q5/02;A61Q5/06;A61Q19/00;C08F2/14;C08F26/00;C08F30/00;C08F30/02;C08F220/04;C08F220/06;C08F220/10;C08F220/42;C08F220/56;C08F226/00;C08F226/02;C08F230/02;C09F11/00;C11D3/37;(IPC1-7):C08F2/06;C08F2/10;C08F20/58;C08K5/05 |
主分类号 |
C08F220/00 |
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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