发明名称 |
POLYMERIC PARTICLES AND THEIR PREPARATION |
摘要 |
CASE 423 POLYMER PARTICLES AND THEIR PREPARATION Polymer particles or beads for use as opacifiers in paints are described in which a core is provided with a hard sheath and the particle has one or more voids produced by reaction with a noncolatile permanent or fixed base. The sheath is a copolymer of an ethylenically unsaturated aliphatic monomer free of acid groups and at least 2 per cent by weight of a soft ester-containing monomer and optionally styrene in an amount of up to 25 mole per cent. The core is formed from an ethylenically unsaturated monomer with acid functionality. The sheath polymer has a glass transition temperature of at least 40.degree.C The particles have a size of up to 40000 nanometers before swelling the core by some 150 to 2000 per cent. |
申请公布号 |
CA1299451(C) |
申请公布日期 |
1992.04.28 |
申请号 |
CA19880584604 |
申请日期 |
1988.11.30 |
申请人 |
TIOXIDE GROUP PLC |
发明人 |
CHIP, GERALD K.;RUDIN, ALFRED |
分类号 |
C08F265/06;C08F265/00;C08F265/02;C08F265/04;C08F267/02;C08F285/00 |
主分类号 |
C08F265/06 |
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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