FIELD: chemistry.
SUBSTANCE: invention relates to a coating composition containing an organic medium and a core/shell polymeric particle, said core having, when dry, at least one void and said shell having in form of polymerised links 18-50 wt % monomer, per weight of the shell, selected from a group comprising acrylonitrile, methacrylonitrile, acrylamide, methacrylamide and mixtures thereof, and 0.1-35 wt % polyethylenically unsaturated monomer, per weight of the shell, in form of polymerised links. The shell of the core/shell polymeric particle is characterised by a calculated shell/organic medium interaction parameter XPS>1.15. A method of providing opacity to coatings is also described.
EFFECT: providing effective levels of opacity of coatings.
4 cl, 18 ex, 11 tbl
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