发明名称 |
Multistage emulsion polymer and improved pigment efficiency |
摘要 |
This invention provides a multistage emulsion polymer including, as copolymerized units: from 0.5% to 5%, by weight P-acid monomer, based on the weight of the emulsion polymer; from 0% to 0.05% by weight multiethylenically unsaturated monomer, based on the weight of the emulsion polymer; and at least one second monoethylenically unsaturated monomer; the emulsion polymer having a calculated Tg of from -20 °C to 50 °C; the emulsion polymer is formed by the "pulsed" addition of 75% to 100% of the P-acid monomer during a stage including from 10% to 50% of the total monomer weight, preferably added during the relatively early stages of the polymerization. A multistage polymer/TiO2 composite particle and an aqueous coating composition including the composite particle are also provided. |
申请公布号 |
EP2426155(B1) |
申请公布日期 |
2013.10.16 |
申请号 |
EP20110177867 |
申请日期 |
2011.08.17 |
申请人 |
ROHM AND HAAS COMPANY |
发明人 |
BOHLING, JAMES CHARLES;HOOK, III, JOHN WILLIAM;BROADWATER, STEVEN JAMES;SMART, REGINALD T.;BROWNELL, ARNOLD STAN |
分类号 |
C08F220/18;C08F2/00;C08F265/06;C08F275/00;C08K3/22;C09C1/00;C09C1/36;C09C3/10;C09D143/02 |
主分类号 |
C08F220/18 |
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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