C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
117/161, 400/502
C09D 5/02 (2006.01) C08J 9/28 (2006.01) C09D 7/00 (2006.01)
Patent
CA 1097832
ABSTRACT Pigmented coating compositions having improved opacity and film strength comprise an aqueous latex of film- forming resin binder, a non-solvent for the resin binder of sufficiently low volatility to produce, upon first removing water from a film of the coating composition end secondly removing said non-solvent, a continuous non-porous micro- cellular film having minute discrete substantially closed voids, non-film-forming granules of a polymer which is not dissolved by the non-solvent, and pigment and/or extender, which may be present in the latex or the non-solvent or the polymer granules. The polymer granules may be spheroidal beads or aggregates. The non-solvent and the polymer granules alleged to act synergistically to improve the opacity of the paint. -1-
277777
Berger Jenson & Nicholson Limited
Ridout & Maybee Llp
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