NITROCELLULOSE-POLYURETHANE PAINT COMPOSITION Russian patent published in 1998 - IPC

FIELD: paint industry; more particularly painting of painted and non-painted wood surfaces. SUBSTANCE: claimed composition comprises (wt %): 3.2-5.0 varnish colloxylin; 7.6-12.9 rosin glycerol ether; 3.0-4.0 product of polyaddition of polyoxytetramethylene glycol with toluylene diisocyanate of general formula: HO[(CH₂)₄₀]_n-{CONH-C₆H₃(CH₃)-(CH₃)-NHCOO[(CH₂)₄]_n}_mH wherein m is 6-10, n is 12-15; 3.0-4.0 flotation agent plasticizer such as oxale or dibutylphthalate and chloroparaffin (in 1:4-5.5 ratio); 1.0-3.0 wt % dry rolled paste; 17.6-19.0 wt % mixture of organic solvent and organic diluent in 3.34:1 ratio the balance. Composition is prepared by technology accepted for nitrocellulose enamels in mixer equipped with rotor-jet or blade stirrer. Properties of composition: covering power as calculated for dry film is 47 g/sq.m gloss is 83% and weight fraction of nonvolatiles is 44%. EFFECT: improved properties of the composition. 2 tbl