发明名称 |
Substantially flat surfaced vinyl polymer emulsion particles having a concavity and process for preparing them |
摘要 |
Substantially flat surfaced emulsion particles polymerized vinyl monomer, having a concavity in at least one of the flat surfaces, a diameter D of from 0.1 to 5.0 mu m, and a particle diameter thickness d ratio (d/D) of 1.2 to 5.0, prepared by the step of (1) aqueous emulsion polymerizing a first vinyl monomer or mixture of monomers (a) to form vinyl polymer seed particles; and (2) aqueous emulsion polymerizing a second vinyl monomer or mixture of monomers (b) in the presence of the vinyl polymer seed particles and a non-aqueous organic solvent having a surface tention to water at 20 DEG C. of 48 dyne/cm or more, in a weight ratio of monomer (a) to monomer (b) of 0.5/99.5 to 50/50; and are useful in high performance recording material, paint compositions and paper coating compositions.
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申请公布号 |
US4948772(A) |
申请公布日期 |
1990.08.14 |
申请号 |
US19890373427 |
申请日期 |
1989.06.30 |
申请人 |
MITSUI TOATSU CHEMICALS, INCORPORATED |
发明人 |
HOSHINO, FUTOSHI;NAKANO, MAKOTO;YANAGIHARA, TAKESHI |
分类号 |
B41M5/44;C08F2/00;C08F2/22;C08F291/00;D21H19/42;D21H19/56;D21H19/60 |
主分类号 |
B41M5/44 |
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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