发明名称 |
Process for preparing polymer powders which are redispersible in aqueous media |
摘要 |
The production of polymer powder comprises drying an aqueous dispersion of a polymer (A) in which the dispersed particles have a positive or negative electric charge on the surface. The process comprises adding, as auxiliary drying agent, a polyelectrolyte (B) which, in its dissociated form as poly-ion and counter-ion is soluble in the aqueous dispersion medium and in which the charge on the poly-ion is opposite to the surface charge on the dispersed polymer. Also claimed are: (i) the polymer powder obtained by this process; and (ii) the polymer powder containing charged spherical particles of (A) and a polyelectrolyte (B).
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申请公布号 |
EP0770640(A2) |
申请公布日期 |
1997.05.02 |
申请号 |
EP19960116679 |
申请日期 |
1996.10.17 |
申请人 |
BASF AKTIENGESELLSCHAFT |
发明人 |
PAKUSCH, JOACHIM, DR.;DIEING, REINHOLD, DR.;TROPSCH, JUERGEN, DR. |
分类号 |
C08L33/14;C08F6/00;C08F6/14;C08J3/16;C08L33/04;C08L33/24;C09D5/00;C09D5/02;C09J11/08;C09J201/00;(IPC1-7):C08J3/16 |
主分类号 |
C08L33/14 |
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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