METHOD FOR PRODUCING A HYDROSILYLATION CATALYST Russian patent published in 2023 - IPC B01J23/42 B01J21/08 B01J37/04 B01J31/16 

FIELD: chemistry.

SUBSTANCE: invention relates to technology for the production of a hydrosilylation catalyst comprising nanosized particles of platinum (0). The method consists in obtaining a hydrosilylation catalyst, in which nanosized particles of platinum (0) are obtained with a yield of at least 97.9 wt. % by boiling hexahydrate of chloroplatinic acid H₂PtCl₆·6H₂O in excess of one of the alcohols of the general formula C_nH_2n+1OH, where n has values in the range 1-4, for 7 hours, followed by three times distillation of acidic water alcohol azeotrope at a residual pressure of 5 mm Hg and temperature 40-60°C, after which the resulting nanosized particles of platinum (0) are mixed with trialkyl (aryl) silyl silicates of the general formula [R¹R²R³SiO_0,5]_x[SiO₂], where R¹=R²=R³=CH₃; R¹=R²=CH₃; R³=C₆H₅; R¹=CH₃; R²=R³=C₆H₅; x has values in the range of 0.875-4, in mass ratios of platinum (0):[R¹R²R³SiO_0,5]_x[SiO₂], lying in the range of 1:233-1:1852, in the presence of absolute ethanol at room temperature, followed by distillation of ethanol at 60°C under vacuum 5 mm Hg, and the yield of the hydrosilylation catalyst is not less than 97.9 wt.% with the content of nanosized particles of platinum (0) 0.055-0.436 wt.%.

EFFECT: obtaining a hydrosilylation catalyst of increased stability, as well as ensuring a high yield and purity of the catalyst.

2 cl, 1 dwg, 7 ex