发明名称 |
THERMALLY STABLE POLYMERS |
摘要 |
The thermostable polymers are characterised in that they comprise… a) from 16 to 67 mol% of units of the formula I …<IMAGE>… b) from 5 to 42 mol% of units of the formula II …<IMAGE>… where R<1>, R<2> and R<3> are each, independently of one another, H or CH3, and… c) from 16 to 46 mol% of units of the formula III …<IMAGE>… in which R<4> is H or CH3,… and, due to their high heat resistance, are highly suitable as retention agents for aqueous systems and as fluid-loss additives. |
申请公布号 |
EP0276718(B1) |
申请公布日期 |
1992.09.02 |
申请号 |
EP19880100624 |
申请日期 |
1988.01.18 |
申请人 |
SKW TROSTBERG AKTIENGESELLSCHAFT |
发明人 |
AIGNESBERGER, ALOIS, DR.;WEICHMANN, JOSEF, DR.;PLANK, JOHANN, DR.;BICHLER, MANFRED |
分类号 |
C09K8/02;C08F8/12;C08F26/10;C08F220/00;C08F220/42;C08F220/44;C08F220/48;C08F220/54;C08F220/56;C08F226/10;C09K8/03;C09K8/24;C09K17/00 |
主分类号 |
C09K8/02 |
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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