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Application

98109011/04, 1998-05-12

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Start date

1998-05-12

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Actual filing date

1998-05-12

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Published

1999-12-10

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Inventor

Lobkov V.D.Kolokol'Tseva I.G.Aleskovskaja E.V.Kormer V.A.Dolgoplosk S.B.

(73)

Holder

Gosudarstvennoe Unitarnoe Predprijatie Nauchno-Issledovatel'Skij Institut Sinteticheskogo Kauchuka Im. Akad. S.V.Lebedeva

METHOD OF PREPARING POLYPHENYLSEQUIOXANE POLYDIORGANOSILOXANE BLOCK COPOLYMERS Russian patent published in 1999 - IPC

Abstract RU 2142478 C1

FIELD: chemical industry. SUBSTANCE: method comprises cohydrolyzing phenyl trichlorosilane and α,ω--bis- chlorosililoligodimethylsiloxane in organic solvent and subsequently treating neutral cohydrolysate in two stages with organic amines in amount of 0.5-5 wt % per polymer. After primary treatment, reaction mixture is concentrated to 30-50 wt % of solution. Concentrated solutions of such block copolymers are useful for forming high- strength film coatings. EFFECT: high physico-mechanical and adhesion properties of the polyphenylsesquioxane polydiorganosiloxane block copolymers. 5 ex, 1 tbl

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RU 2 142 478 C1

Authors

Lobkov V.D.

Kolokol'Tseva I.G.

Aleskovskaja E.V.

Kormer V.A.

Dolgoplosk S.B.

Dates

1999-12-10—Published

1998-05-12—Filed

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