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Application

97107673/04, 1997-05-06

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Actual filing date

1997-05-06

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Published

1999-04-27

(72)

Inventor

Glukhovskoj V.S.Sitnikova V.V.Alekhin V.D.Fil' V.G.Kudrjavtsev L.D.Molodyka A.V.Privalov V.A.Gusev A.V.Navrotskij Ju.V.Stepanova I.A.Danilova V.I.

(73)

Holder

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

METHOD OF THERMOELASTOPLASTICS Russian patent published in 1999 - IPC

Abstract RU 2129569 C1

FIELD: chemistry of polymers, more particularly preparation of block copolymers based on diene hydrocarbons and α-methylstyrene. SUBSTANCE: invention describes method of preparing thermoelastoplastics by block copolymerization of α-methylstyrene and butadiene in organic solvent. Method is carried out using n-butyl lithium in the presence of methyl-tert butyl ether modifier, and "living" diblock copolymers are subsequently combined with polyfunctional combination agent. On completion of combination reaction, residual α-methylstyrene is copolymerized with styrene in block copolymer solution in 1:1-1.5 moles in the presence of initiating system consisting of n-butyl lithium, alkali metal alkoxide, methyl-tert-butyl ether at 1:1-3: 3-25 ratio. Present invention makes it possible to obtain complete conversion of α-methylstyrene and improve physico-methanical and adhesion characteristics of thermoelastoplastics. EFFECT: more efficient preparation method. 2 cl, 7 ex, 1 tbl

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RU 2 129 569 C1

Authors

Glukhovskoj V.S.

Sitnikova V.V.

Alekhin V.D.

Fil' V.G.

Kudrjavtsev L.D.

Molodyka A.V.

Privalov V.A.

Gusev A.V.

Navrotskij Ju.V.

Stepanova I.A.

Danilova V.I.

Dates

1999-04-27—Published

1997-05-06—Filed