Polymer aggregates

Details Polymer aggregates Polymer aggregates

1977-10-21

1980-03-04

Marquis, Melvyn I.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 4243, 260 4244, 260 318HR, 260 318PQ, 260 318L, 428402, 526319, 526320, 526303, 526317, 526328, 526330, 526341, 526342, 526346, 526909, C08L 2900

Patent

active

041916727

ABSTRACT:
Polymer aggregates in the form of discrete particles of controlled particle size below 150 microns maximum dimension which are themselves aggregates of primary particles of a polymer or polymers derived from at least one ethylenically unsaturated monomer together with from 0 to about 400%, by weight on the weight of the monomer, of an organic thickener compatible with the monomer, said aggregate particle containing from 0 to about 95% by weight of pigment and/or extender are made by providing an aqueous dispersion of the monomer and thickener, a hydrophilic colloid being present in the aqueous phase of the dispersion and pigment and/or extender optionally being present in either the aqueous phase or the disperse phase, introducing a polymerization initiator into the aqueous phase of the dispersion, and maintaining the dispersion under conditions of high shear and continuing polymerization to substantial completion thereof. The aggregates are useful in coating comositions, e.g. to provide a matt finish.

REFERENCES:
patent: 3725367 (1973-04-01), Kemp
patent: 3780007 (1973-12-01), Stallings
patent: 3814740 (1974-06-01), Miller
patent: 3880771 (1975-04-01), Klein
patent: 3976629 (1976-08-01), Hayward et al.
patent: 4071653 (1978-01-01), Boessler et al.
Jirgensons et al., A Short Textbook of Colloid Chemistry, Wiley & Sons, Inc., N. Y., 1954, pp. 15, 322, 333-336.

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