COMPOSITION FOR PRIMER OR TYPE COATING, AND PROCESS FOR PREPARING THEREOF Russian patent published in 1994 - IPC

FIELD: primer and putty coatings for wood-fiber and wood particle boards, concrete, and metal. SUBSTANCE: the composition comprises (%): 3.0-9.0 30-50% latex having a pH of 2.5-6.0 of a butadiene-acrylonitrile-methacrylic acid copolymer at a monomer ratio of 20-60: 10-40: 30-40 ration with a molecular weight of 10⁴-10⁵ (on conversion to dry substance); 31.0-70.0 a filler 1.0-19.0 pigment; 0.01-1.0 a mineral oil based emulsion; 0.1-5.0 10-25% aqueous ammonia and/or 10-50% aqueous sodium or potassium hydroxide; and water, the balance. The latex having a pH of 2.5-6.0 is first diluted with water to a 10-19% concentration. Aqueous ammonia and/or aqueous sodium or potassium hydroxide is added to attain a pH of 6.9-8.0. The neutralized latex is combined with a self-emulsifying oil, a pigment and a filler. The characteristics of the composition: the drying time at 100 C is 20-90 s; this adhesion is 1 point; the elasticity is 1 mm; the hardness is 0.7. EFFECT: improved properties of the composition. 3 cl, 1 tbl