GB1090207A - Elastomeric block copolymers - Google Patents

Elastomeric block copolymers

Info

Publication number
GB1090207A
GB1090207A GB47887/65A GB4788765A GB1090207A GB 1090207 A GB1090207 A GB 1090207A GB 47887/65 A GB47887/65 A GB 47887/65A GB 4788765 A GB4788765 A GB 4788765A GB 1090207 A GB1090207 A GB 1090207A
Authority
GB
United Kingdom
Prior art keywords
diene
block
block copolymers
elastomeric
molecular weight
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
GB47887/65A
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of GB1090207A publication Critical patent/GB1090207A/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
    • 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
    • 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
    • C08F8/00—Chemical modification by after-treatment
    • C08F8/04—Reduction, e.g. hydrogenation

Abstract

Elastomeric block copolymers are made having the formula A-B-A in which each A is a polymer block of a conjugated diene having from 4-10 carbon atoms and an average molecular weight of 40,000 to 250,000 and B is a polymer block of a conjugated diene having from 4-10 carbon atoms and different from that of block A and having an average molecular weight of 100,000 to 1,000,000. The block copolymers are made by (a) polymerizing a C4-C10 diene in an inert hydrocarbon solvent using the required amount of secondary alkyl lithium initiator, calculated on the basis of one alkyl lithium radical per growing polymer chain, so as to obtain a molecular weight of the final polymer chain of 40,000 to 250,000, (b) adding to the same reaction mixture a different C4-C10 diene, (c) continuing polymerizatio until substantially no unpolymerized diene remains, (d) adding to the same reaction mixture a C4-C10 diene different from the diene used in step (b), and (e) continuing polymerization to form an A-B-A block copolymer. Dienes specified are butadiene, isoprene, piperylene, dimethylbutadiene, 1,3-hexadiene and chloroprene. The block copolymer may be after-treated by hydrogenation or may be blended with block copolymers of the formula E-D-E in which E is a non-elastomeric polymer block of a vinyl arene or vinyl pyridine and D is an elastomeric conjugated diene polymer block. The example describes the preparation of polybutadiene-polyisoprene-polybutadiene block copolymers using secondary butyl lithium as a catalyst.
GB47887/65A 1964-11-13 1965-11-11 Elastomeric block copolymers Expired GB1090207A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US41095764A 1964-11-13 1964-11-13

Publications (1)

Publication Number Publication Date
GB1090207A true GB1090207A (en) 1967-11-08

Family

ID=23626959

Family Applications (1)

Application Number Title Priority Date Filing Date
GB47887/65A Expired GB1090207A (en) 1964-11-13 1965-11-11 Elastomeric block copolymers

Country Status (6)

Country Link
BE (1) BE672289A (en)
DE (1) DE1570168A1 (en)
FR (1) FR1453625A (en)
GB (1) GB1090207A (en)
NL (1) NL6514631A (en)
SE (1) SE331905B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409056A (en) * 1978-09-12 1983-10-11 Kuraray Co., Ltd. Curable sealing composition
WO2004013197A1 (en) * 2002-08-01 2004-02-12 Societe De Technologie Michelin Rubber composition for use as a bonding rubber in a tyre
CN112779630A (en) * 2021-01-09 2021-05-11 刘宝银 Fiber with high tensile rate and preparation method thereof
CN114555665A (en) * 2019-08-07 2022-05-27 米其林集团总公司 Ethylene-rich diene block polymers having statistical blocks and polyethylene blocks

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4073737A (en) * 1976-04-19 1978-02-14 Exxon Research & Engineering Co. Hydrogenated copolymers of conjugated dienes and when desired a vinyl aromatic monomer are useful as oil additives

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409056A (en) * 1978-09-12 1983-10-11 Kuraray Co., Ltd. Curable sealing composition
WO2004013197A1 (en) * 2002-08-01 2004-02-12 Societe De Technologie Michelin Rubber composition for use as a bonding rubber in a tyre
CN114555665A (en) * 2019-08-07 2022-05-27 米其林集团总公司 Ethylene-rich diene block polymers having statistical blocks and polyethylene blocks
CN114555665B (en) * 2019-08-07 2024-01-12 米其林集团总公司 Ethylene-rich diene block polymers with statistical blocks and polyethylene blocks
CN112779630A (en) * 2021-01-09 2021-05-11 刘宝银 Fiber with high tensile rate and preparation method thereof

Also Published As

Publication number Publication date
BE672289A (en) 1966-05-12
NL6514631A (en) 1966-05-16
DE1570168A1 (en) 1969-08-28
SE331905B (en) 1971-01-18
FR1453625A (en) 1966-06-03

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