发明名称 |
FOERFARANDE FOER FRAMSTAELLNING AV VATTENLOESLIGA SAMPOLYMERER INNEHAOLLANDE VINYLAMINENHETER OCH ANVAENDNING AV DESSA SOM VAOT- OCH TORRSTYRKEMEDEL FOER PAPPER. |
摘要 |
Water-soluble copolymers containing copolymerized vinylamine units are prepared by copolymerizing (a) from 95 to 10 mol % of N-vinylformamide and (b) from 5 to 90 mol % of an ethylenically unsaturated monomer from the group consisting of vinyl acetate, vinyl propionate, C1-C4-alkyl vinyl ethers, the esters, nitriles and amides of acrylic acid and methacrylic acid and N-vinylpyrrolidone, and then eliminating from 30 to 100 mol % of the formyl groups from the copolymer. Preferred copolymers are copolymers of N-vinylformamide and vinyl acetate, in which from 30 to 100 mol % of the monomer units are hydrolyzed. The copolymers are used in papermaking to increase the dry strength and wet strength of the paper. |
申请公布号 |
FI863755(A0) |
申请公布日期 |
1986.09.17 |
申请号 |
FI19860003755 |
申请日期 |
1986.09.17 |
申请人 |
BASF AKTIENGESELLSCHAFT |
发明人 |
PFOHL, SIGBERG;KROENER, MICHAEL;HARTMANN, HEINRICH;DENZINGER, WALTER |
分类号 |
C08F8/12;C08F16/16;C08F18/02;C08F20/52;C08F26/00;C08F26/06;C08F216/16;C08F216/18;C08F218/02;C08F218/04;C08F218/08;C08F218/10;C08F220/00;C08F220/02;C08F220/10;C08F220/18;C08F220/42;C08F220/56;C08F226/02;C08F226/10;D21H17/34;D21H17/36;D21H17/37;D21H17/45;D21H21/18 |
主分类号 |
C08F8/12 |
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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