FR2090626A5 - Styrene-butadiene block copolymers - obtained with aid of a lithium - initiator and having good optical clarity and phys props - Google Patents

Styrene-butadiene block copolymers - obtained with aid of a lithium - initiator and having good optical clarity and phys props

Info

Publication number
FR2090626A5
FR2090626A5 FR7114525A FR7114525A FR2090626A5 FR 2090626 A5 FR2090626 A5 FR 2090626A5 FR 7114525 A FR7114525 A FR 7114525A FR 7114525 A FR7114525 A FR 7114525A FR 2090626 A5 FR2090626 A5 FR 2090626A5
Authority
FR
France
Prior art keywords
aid
aromatic hydrocarbon
props
phys
initiator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
FR7114525A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denka Co Ltd
Original Assignee
Denki Kagaku Kogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denki Kagaku Kogyo KK filed Critical Denki Kagaku Kogyo KK
Application granted granted Critical
Publication of FR2090626A5 publication Critical patent/FR2090626A5/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
    • C08F212/02—Monomers containing only one unsaturated aliphatic radical
    • C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
    • C08F212/06—Hydrocarbons
    • C08F212/08—Styrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
    • C08F297/02—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type
    • C08F297/04—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type polymerising vinyl aromatic monomers and conjugated dienes
    • C08F297/042—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type polymerising vinyl aromatic monomers and conjugated dienes using a polyfunctional initiator

Abstract

Block copolymer of a vinyl-substd. aromatic hydrocarbon and a conjugated diene is characterised by a three-block structure with an elastomeric copolymeric central block of the conjugated diene and a minor amount of the vinyl-substd. aromatic hydrocarbon, the frequency of the structural units formed by the conjugated diene decreasing from the middle of the central block towards the ends thereof, and further characterised by two terminal homopolymeric blocks of the vinyl-substd., aromatic hydrocarbon. Preparation is by one-step "living" polymerisation with the aid of a reaction product of Li with a non-condensed polycyclic aromatic hydrocarbon, reaction being effected in a polar medium.
FR7114525A 1970-04-24 1971-04-23 Styrene-butadiene block copolymers - obtained with aid of a lithium - initiator and having good optical clarity and phys props Expired FR2090626A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3473770A JPS501915B1 (en) 1970-04-24 1970-04-24

Publications (1)

Publication Number Publication Date
FR2090626A5 true FR2090626A5 (en) 1972-01-14

Family

ID=12422616

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7114525A Expired FR2090626A5 (en) 1970-04-24 1971-04-23 Styrene-butadiene block copolymers - obtained with aid of a lithium - initiator and having good optical clarity and phys props

Country Status (3)

Country Link
JP (1) JPS501915B1 (en)
DE (1) DE2120232C3 (en)
FR (1) FR2090626A5 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3953543A (en) * 1973-12-26 1976-04-27 The Firestone Tire & Rubber Company Polymerization process and polymer produced thereby

Also Published As

Publication number Publication date
DE2120232A1 (en) 1971-12-02
DE2120232C3 (en) 1979-05-03
DE2120232B2 (en) 1978-09-07
JPS501915B1 (en) 1975-01-22

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Legal Events

Date Code Title Description
ST Notification of lapse