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2 556 639

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IPC

C08G77/06(2006-01-01)

(21) (22)

Application

2014124027/04, 2014-06-16

(24)

Start date

2014-06-16

(22)

Actual filing date

2014-06-16

(45)

Published

2015-07-10

(72)

Inventor

Zavin Boris Grigor'EvichTrankina Ekaterina SergeevnaCherkun Natalija VladimirovnaMuzafarov Aziz Mansurovich

(73)

Holder

A.N.Nesmeyanov Institute Of Organoelement Compounds Russian Academy Of Sciences Ras)

METHOD OF OBTAINING OLIGOORGANOSILOXANES Russian patent published in 2015 - IPC C08G77/06

Abstract RU 2556639 C1

FIELD: chemistry.

SUBSTANCE: claimed method of obtaining oligoorganosiloxanes, macromolecules of which contain different structural units, by hydrolytic polycondesation of chlorosilanes in water-free active medium, containing aprotic organic solvent and mixture of carbamide with 1,3-diketine (acetykacetone, acetoacetic ether, malonic ether), with reagent ratio (counted per 1 group≡SiCl) chlorosilane:carbamide:1,3-diketone, equal 1.0:(0.5-1.2):(0.5-1.2) mol. As chlorosilanes used are compounds Y_3-nSiCl_n, (n = 1÷3, Y is monovalent hydrocarbon substituents -CH₃, -C₂H₅, -C₃H₇; -C₄H₉, -CH=CH₂, -C₆H₆, or -H). Copolycondensation is carried out by heating reaction mass with further boiling for 1-5 h; after cooling sediment of formed nitrogenous base salt and target product is separated from solution by known methods. Molecular weight of formed oligosiloxanes reaches <6000 units.

EFFECT: claimed is technological and environmentally friendly method of obtaining oligoorganosiloxanes with mixed composition with different siloxane units directly from available industrially produced organochlorosilanes.

2 cl, 1 dwg, 8 ex

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RU 2 556 639 C1

Authors

Zavin Boris Grigor'Evich

Trankina Ekaterina Sergeevna

Cherkun Natalija Vladimirovna

Muzafarov Aziz Mansurovich

Dates

2015-07-10—Published

2014-06-16—Filed