| 摘要 |
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 and secondly removing said non-solvent, a continuous non-porous microcellular 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.
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