METHOD OF PRODUCING FUNCTIONAL POLYORGANOSILOXANES AND COMPOSITION BASED THEREON Russian patent published in 2011 - IPC C08G77/06 C08G77/04 C08G77/18 C08L83/05 C08L83/07 

Abstract RU 2427592 C2

FIELD: chemistry.

SUBSTANCE: disclosed is a method of producing functional polyorganosiloxanes through polycondensation of organoalkoxysilanes in an active medium which is an anhydrous carboxylic acid or mixture thereof with an organic solvent, where said organoalkoxysilanes are selected from R'CH3Si(OR)2; R"Si(OR)3; R"2Si(OR)2 and R'n(CH3)3-nSiOR, where R denotes CH3 or C2H5; R' - CH2=CH- or H; R" - C6H5 or CH2=CH- or CH3; n equal 0 and/or 1; where the starting organoalkoxysilanes are selected in a way which enables to obtain in one production cycle functional polyorganosiloxanes of given structures from: (A) - containing an average of at least two vinyl groups for each macromolecule; (B) containing an average of at least two hydride silyl groups for each macromolecule. Disclosed also is a curable composition based on functional polyorganosiloxanes obtained using the disclosed method.

EFFECT: method enables to obtain polyorganosiloxanes with reproducible composition and molecular weight and the obtained composition can be used to encapsulate light-emitting devices.

21 cl, 5 dwg, 6 ex

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RU 2 427 592 C2

Authors

Muzafarov Aziz Mansurovich

Tebeneva Nadezhda Andreevna

Mjakushev Viktor Davidovich

Vasilenko Natalija Georgievna

Parshina Ekaterina Viktorovna

Meshkov Ivan Borisovich

Nisiguti Sedzi

Jaginuma Dajsukeh

Kamata Khirotosi

Dates

2011-08-27Published

2007-04-24Filed