FIELD: chemistry.
SUBSTANCE: invention relates to an aqueous polyurethane-polycarbamide dispersion (PUR-dispersion), used for coating substrates, as well as for preparing mixtures and adhesives. The dispersion has two separate maxima in particle size distribution. The maximum ratio of fine fractions lies between 51 and 150 nm and the maximum ratio of coarse fractions lies between 160 and 700 nm. Said PUR-dispersion contains external emulsifying agents, has low viscosity, is stable during storage and transportation and solidifies at relatively low temperatures between 120°C and 150°C in 2-3 minutes.
EFFECT: coatings obtained from such PUR-dispersion have high adhesion strength in wet state, high wear resistance, scratch resistance, flexing resistance and hydrolysis resistance.
10 cl, 5 ex, 1 tbl
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