发明名称 |
Preparation of stable aqueous polymer dispersions which contain an alkenyl-aromatic compound as copolymerized units |
摘要 |
A process for the preparation of stable aqueous polymer dispersions which contain an alkenyl-aromatic compound as copolymerized units, by polymerizing monomer mixtures which contain (a) not less than 2% by weight of an alkenyl-aromatic compound and (b) from 0.5 to 10% by weight of an ethylenically unsaturated C3-C5-carboxylic acid and/or its amide and/or its nitrile and/or an ethylenically unsaturated monomer containing sulfonic acid groups, with or without (c) acrylic acid esters, methacrylic acid esters and/or butadiene in aqueous emulsion in the presence of a polymerization initiator, with or without an emulsifier and with or without a polymerization regulator, at a pH below 7, in the presence of from 0.2 to 2% by weight of formaldehyde.
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申请公布号 |
US4661557(A) |
申请公布日期 |
1987.04.28 |
申请号 |
US19850749542 |
申请日期 |
1985.06.27 |
申请人 |
BASF AKTIENGESELLSCHAFT |
发明人 |
BUBAM, HANS-GEORG;HEIDER, LOTHAR;BIEDERBECK, UWE;STANGER, BERND |
分类号 |
C08F2/00;C08F2/22;C08F2/24;C08F2/44;C08F212/04;C08F212/06;C08F220/00;C08F220/02;D21H19/58;(IPC1-7):C08K5/07 |
主分类号 |
C08F2/00 |
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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