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Application

98112996/04, 1998-07-14

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Start date

1998-07-14

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Actual filing date

1998-07-14

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Published

1999-11-27

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Inventor

Glukhovskoj V.S.Litvin Ju.A.Sitnikova V.V.Kulakova K.A.Fil' V.G.Kudrjavtsev L.D.Molodyka A.V.Privalov V.A.Gusev A.V.Navrotskij Ju.V.Stepanova I.A.

(73)

Holder

Gosudarstvennoe Predprijatie Institut Sinteticheskogo Kauchuka Im.Akad.S.V.Lebedeva"

METHOD OF MANUFACTURE OF THERMOELASTOPLATICS Russian patent published in 1999 - IPC

Abstract RU 2141976 C1

FIELD: methods of manufacture of block copolymers possessing properties of thermoelastoplastics. SUBSTANCE: method consists in block copolymerization of styrene or α methylstyrene and dien in medium of organic solvent under action of primary organolothium initiator in presence of modifier - methyl tertiary butyl ether; used as primary organolithium initiator is complex soluble in hydrocarbon solvent which is obtained through interaction of ethyl chloride with dispersion of lithium at molar ratio of 1:2.05 - 2.10 and temperature of 50 to 60 C followed by introduction of monomer into reaction mass. Monomer is selected from group of ethylene, butadiene, isoprene, piperylene, styrene or mixture of butadiene with styrene at molar ratio of monomer of ethyl lithium 0.25-1.00: 1 at dosage of initiator of 4,5•10-5 - 1,2•10-4 of moles of active lithium per kg of vinyl aromatic monomer. EFFECT: reduced time of synthesis of first polystyrene or poly-α-methyl styrene block; reduced consumption of initiator. 3 tbl, 16 ex

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RU 2 141 976 C1

Authors

Glukhovskoj V.S.

Litvin Ju.A.

Sitnikova V.V.

Kulakova K.A.

Fil' V.G.

Kudrjavtsev L.D.

Molodyka A.V.

Privalov V.A.

Gusev A.V.

Navrotskij Ju.V.

Stepanova I.A.

Dates

1999-11-27—Published

1998-07-14—Filed

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