METHOD OF PRODUCING LINEAR THERMOELASTOLAYERS

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 con...

Full description

Saved in:
Bibliographic Details
Main Authors ALEKHIN V.D, SITNIKOVA V.V, PRIVALOV V.A, FIL' V.G, KUDRJAVTSEV L.D, DANILOVA V.I, GLUKHOVSKOJ V.S, KOVTUNENKO L.V, MOISEEV V.V, MOLODYKA A.V
Format Patent
LanguageEnglish
Published 27.06.1998
Edition6
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
Online AccessGet full text

Cover

More Information
Summary: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 tbls
Bibliography:Application Number: RU19950113575