FIREPROOF DECORATIVE-FINISHING MATERIAL AND METHOD OF OBTAINING THEREOF Russian patent published in 2014 - IPC C09K21/14 D06N3/14 B29C67/06 B32B27/40 

FIELD: chemistry.

SUBSTANCE: invention relates to elaboration of a fireproof decorative-finishing material - artificial leather, obtained by coagulation of a solution based on a polyurethane composition. The decorative-finishing material contains a woven layer, preliminarily impregnated with an aqueous silicone emulsion and dried to the weight gain of the latter of 3.0-8.5 wt %, on which, after that, a primer and a front layer are successively applied with intermediate drying. The primer layer is made of a composition, which contains 25% solution of polyurethane "Vitur 0512", dimethyl formamide with a viscosity of 120-170 P and a dry residue 18.0-22.0 wt % for the primer layer. The front layer is made of a composition, containing 15% solution of polyurethane "Vitur 0512", a surface-active substance OP-10, di-(2-ethylhexyl)-phthalate, ammonium polyphosphate, dimethylformamide with a viscosity of 205-210 P and a dry residue 26.0-27.0 wt % for the front layer. Front layers are coagulated in a coagulation bath with a composition of 30.0 wt % of dimethylformamide and 70.0 wt % of water at a temperature of 50°C for 20 min, washed in a bath with flowing water until content of dimethylformamide is less than 3.0%, dried and finished with a polyurethane composition, containing 25% solution of polyurethane "Vitur 0512", the surface-active substance OP-10, di-(2-ethylhexyl)-phthalate, ammonium polyphosphate, dimethylformamide with a viscosity of 84 P and a dry residue 24.5 wt %. After that, the half-finished product is processed in a padding bath with compression rolls at a temperature of 60°C with an aqueous solution of a mixture of polyphosphoric acids and urea with a ratio of nitrogen and phosphorus respectively 1.0:1.56-1.80 and drying for 4 min at a temperature of 120°C until the weight gain is 20.0-25.0 wt %. The obtained finished material has a ratio of layers by weight, equal: woven layer, including 3.0-8.5 wt % of the silicone emulsion: polyurethane layers: the said mixture of polyphosphoric acids and urea respectively 1.0:0.85-0.93:0.37-0.48.

EFFECT: obtained fireproof decorative-finishing material has high hygienic parameters and fire resistance by GOST 25076-81 - 0 mm/s, time of smouldering - 3-4 s.

2 cl, 4 tbl, 7 ex