HOLLOW POLYMER COMPOSITION Russian patent published in 2020 - IPC C09D5/02 C08J3/12 C09D7/20 C09D151/02 C09D201/00 

FIELD: paint industry.

SUBSTANCE: group of inventions relates to a method of producing a coating, such as paint or ink, containing a polymer composition, as well as a polymer composition, suitable for producing a coating and a non-aqueous dispersion for producing a coating containing hollow polymer particles. Method of producing coating includes steps of: (a) providing an aqueous dispersion containing (i) from 1 % to 40 % of hollow polymer particles by weight of the weight of the aqueous dispersion, wherein hollow polymer particles contain from 0.01 % to 20 % of polymerised links of one or more polyvinyl monomers by weight of the mass of hollow polymer particles, (ii) from 40 % to 98.9 % of water by weight of the weight of the aqueous dispersion, and (iii) from 0.1 % to 20 % of cyclodextrin by weight of the weight of the aqueous dispersion, and (b) removing water from the aqueous dispersion to obtain dry composition, containing hollow polymer particles and cyclodextrin, wherein either water is absent in dry composition, or water is present in the dry composition in an amount such that the weight ratio of water to the hollow polymer particles is 0.2:1 or less, and (c) after step (b) preparing the dry composition dispersion in a non-aqueous medium in the form of a non-aqueous dispersion suitable as said coating.

EFFECT: technical result is providing uniform dispersion of hollow polymer particles in paints based on organic solvents with improved properties such as, for example, one or more light scattering and luster.

6 cl, 2 tbl, 2 ex