Patent EP0270515A2 successfully refreshed from Google Patents.
EP0270515A2
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EP
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Process for the production of transparent block copolymers
Assignee: Total Petrochemicals Research Feluy SA
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Filing: 1987-11-30
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Granted: —
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Expires: 2007-11-30
Abstract
Abstract Process for producing new transparent block copolymers containing from 60 to 95 % by weight of vinylaromatic monomer and from 40 to 5 % of a conjugated diene monomer, which consists in forming by sequential anionic polymerisation (1) a vinylaromatic homopolymer S1, (2) a conjugated diene homopolymer B1 bonded to S1, (3) a random copolymer B/S of vinylaromatic and of conjugated diene, bonded to B1, and (4) a vinylaromatic homopolymer S2, bonded to B/S and with a molecular weight at least twice that of S1, and then in recovering the block copolymer S1-B1-B/S-S2 thus formed.
Inventors
- 👤 Emmanuel Lanza
- 👤 Jean M.M.G. Naveau
- 👤 Michel Daumerie
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 15:31
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08F; C08F297/00; C08F297/02; C08F297/04; C08L23/00; C08L23/02; C08L25/08; C08L25/12; C08L53/00; C08L53/02
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