METHOD OF POWDERED LACQUER COMPOSITION PREPARING Russian patent published in 2003 - IPC

FIELD: chemical technology. SUBSTANCE: invention relates to synthesis of color powdered lacquers, in part, for utilization in powdered compositions for covers. Method of synthesis of powdered lacquer based on polyester involves the following stages: (a) combined or separated heating component (A) up to temperature 120-200 C of 99-40 wt.% of polyester precondensate and/or monomers used for their synthesis; component (B) 1-60 wt.% of pigments and component (C) 0-10 wt.% of wetting additions and/or other additions used usually for lacquers being mas.% and sum is 100%; (b) mixing components (A), (B) and (C) to homogeneous state using shift strength and temperature heating maintaining; (c) dispersing obtained mixture in dispersion medium at temperature that is equal or exceeding melting point of parent components (A), (B) and (C) followed by polycondensation of precondensate of polyester (A) and/or its monomers; (d) cooling dispersed system and addition of usual cross-linking agent for polyester and, optionally, usual additions at temperature range from 60 to 140 C and to composition of powdered lacquer prepared on the basis of method proposed. Prepared powdered lacquers exhibit cross-linking points and solidification time equal to values known for powdered lacquers prepared by the known methods. EFFECT: improved method of preparing. 5 cl, 1 tbl, 2 dwg, 3 ex