IMPROVED COATING COMPOSITION Russian patent published in 2011 - IPC C09D5/02 C09D133/00 C09D133/10 C09D155/02 C09D167/00 C08F2/24 

FIELD: chemistry.

SUBSTANCE: pigmented aqueous coating composition, having gloss of at least 75% after setting, contains i) a non-cross linking aqueous dispersion of an addition oligomer with average molecular weight of 5000-15000 Da and Fox Tc higher than 0°C and lower than 50°C, ii) an aqueous dispersion of an addition polymer with average molecular weight greater than 53000 Da and Fox Tc higher than 10°C and lower than 40°C and average particle diametre smaller than 150 nm, and a pigment. The ratio i):ii) is between 0.25:1 and 2.7:1 in terms of wt % of solid substances. The invention also describes a method of applying a coating onto a base using the pigmented aqueous composition; a method of producing a non-cross linking addition oligomers with average molecular weight of 5000-15000 Da and Fox Tc higher than 0°C and lower than 50°C, use of a combination of a polymer with average molecular weight greater than 53000 Da, Fox Tc higher than 10°C and lower 40°C and average particle diametre smaller than 150 nm and a non-cross linking addition oligomer for obtaining an improved pigmented aqueous coating composition. The coating obtained using the pigmented aqueous composition has setting time of 6-12 minutes and gloss after setting of at least 75%.

EFFECT: improved composition properties.

13 cl, 4 tbl, 23 ex