Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1994-02-01
1995-04-25
Jagannathan, Vasu S.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
525301, 525309, 525274, 525286, 525293, 525296, 525303, 525305, 525310, 525317, B32B 2730, C08F26502, C08F26504, C08F25702
Patent
active
054097762
ABSTRACT:
A multi-shell emulsion particle of dry state structure having one or more of penetrating pore(s) connecting the surface layer of the particle with the interior of the particle and having a particle diameter of from 0.1 to 5.0.mu. preferably from 0.1 to 1.2.mu.. The particles can be prepared by emulsion polymerization of a vinyl monomer (a) containing from 5 to 80% by weight of an unsaturated carboxylic acid to obtain a polymer (A), forming a polymer (B) in the presence of a particle consisting of the resultant polymer (A) while adding a vinyl monomer (b) in an amount of 10 times by weight or less and at a rate of 3 times by weight per hour or more for the weight of the polymer (A), and treating the resultant multi-shell emulsion polymer with an alkaline material to neutralize and swell the polymer (A); or, after the neutralization treatment, further forming a polymer (C) by adding and emulsion-polymerizing a vinyl monomer (c) in an amount of 20 times by weight or less for the total weight of the polymer (A) and polymer (B). The emulsion particle is useful as a component of resin compositions for paints, paper-coating and heat-sensitive recording materials.
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English Abstract of JP 59-59741 (Apr. 1984).
English Abstract of JP 63-281886 (Nov. 1988).
Hoshino Futoshi
Someya Kousuke
Yamazaki Akihiro
Yanagihara Takeshi
Jagannathan Vasu S.
Mitsui Tomatsu Chemicals, Incorporated
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