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2 114 129

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Application

95113575/04, 1995-08-10

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Actual filing date

1995-08-10

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Published

1998-06-27

(72)

Inventor

Glukhovskoj V.S.Alekhin V.D.Sitnikova V.V.Fil' V.G.Moiseev V.V.Kovtunenko L.V.Kudrjavtsev L.D.Molodyka A.V.Privalov V.A.Danilova V.I.

(73)

Holder

Voronezhskij Filial Gosudarstvennogo Predprijatija Institut Sinteticheskogo Kauchuka Im.Akad.S.V.Lebedeva"

METHOD OF PRODUCING LINEAR THERMOELASTOLAYERS Russian patent published in 1998 - IPC

Abstract RU 2114129 C1

FIELD: polymer production. SUBSTANCE: invention relates to thermoelastolayers useful in fabrication of rubber products and sole materials as well as for modifying plastics and bitumens. These materials, constituting block copolymers of A-B-A type where a is monovinylaromatic compound block and B conjugated diene block, are produced by block-copolymerization of vinylaromatic compounds with diene hydrocarbons in organic solvent medium in presence of organolithium compound and a polar additive followed by conjugating living di-block copolymers by a carboxylic acid ester. In particular, as conjugating agent, ethyl acetate may be used being added in two steps: in the beginning of conjugation process, 80-90% of total ethyl acetate amount is added and the rest is added 30 min later. As polar additive, methyl-tert-butyl ether is used. Organolithium compound/ethyl acetate/methyl-tert-butyl ether molar ratio is 1:0.5:(2-0.5). EFFECT: optimized process parameters. 1 tbl

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RU 2 114 129 C1

Authors

Glukhovskoj V.S.

Alekhin V.D.

Sitnikova V.V.

Fil' V.G.

Moiseev V.V.

Kovtunenko L.V.

Kudrjavtsev L.D.

Molodyka A.V.

Privalov V.A.

Danilova V.I.

Dates

1998-06-27—Published

1995-08-10—Filed

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