METHOD OF PRODUCING ORGANOSILICON RESINS Russian patent published in 2010 - IPC C08G77/06 

FIELD: chemistry.

SUBSTANCE: method is proposed for producing organosilicon resins containing silicon dioxide structural fragments, in which the initial components used are hexaorganodisiloxane of general formula [R'R₂Si]₂O, where R=-CH₃; R'=-CH₃; -C₆H₅; -CH=CH₂ or its mixture with organoalkoxysilanes of general formula R_nSi(OR')_4-n, where R'=-CH₃; -C₂H₅; n=1, 2, 3 and a product of partial hydrolysis of tetraethoxysilane, acidolysis is carried out in the presence of catalytic amounts of trimethylchlorosilane with subsequent heating of the reaction mass until boiling and holding for 1-6 hours until formation of the end product. Proposed method excludes and considerably reduces use of aliphatic alcohol, reduces consumption of acetic acid and reduces formation of byproducts. Obtained resins can be used as modifiers of organosilicon and organic rubber and liquids, as well as binder components for making new generation polymer composite materials.

EFFECT: design of a cost-effective process which also reduces formation of acidic production wastes.

1 cl, 2 tbl, 3 ex