GB1409956A - Method of preparing a thermostable block-copolymer - Google Patents

Method of preparing a thermostable block-copolymer

Info

Publication number
GB1409956A
GB1409956A GB2241173A GB2241173A GB1409956A GB 1409956 A GB1409956 A GB 1409956A GB 2241173 A GB2241173 A GB 2241173A GB 2241173 A GB2241173 A GB 2241173A GB 1409956 A GB1409956 A GB 1409956A
Authority
GB
United Kingdom
Prior art keywords
polymerization
block
styrene
final
diene
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
GB2241173A
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.)
VORON VNII SINTET ICHESKOGO KA
Original Assignee
VORON VNII SINTET ICHESKOGO KA
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 VORON VNII SINTET ICHESKOGO KA filed Critical VORON VNII SINTET ICHESKOGO KA
Priority to GB2241173A priority Critical patent/GB1409956A/en
Publication of GB1409956A publication Critical patent/GB1409956A/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
    • 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
    • C08F297/046—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 polymerising vinyl aromatic monomers and isoprene, optionally with other conjugated dienes
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Graft Or Block Polymers (AREA)

Abstract

1409956 Alphamethyl styrene block copolymerization VORONEZHSKY FILIAL VSESOJUZNOGO NAUCHNO ISSLEDOVATELSKOGO INSTITUTA SINTETICHESKOGO KAUCHUKA IMENI AKADEMIKA SV LEBEDEVA VORONEZH 10 May 1973 22411/73 Heading C3P Thermostable block copolymers of formula ABA, where each A is a poly-alpha-methylstyrene block and B is a polymer of a conjugated diene, are obtained by a three-stage sequential process using sec.-butyl lithium initiator, a hydrocarbon or alpha-methyl styrene solvent, and operating at temperatures within the ranges 0‹ to 40‹ C. for the first alphamethyl styrene polymerization, 40‹ to 80‹ C. for the subsequent diene polymerization and at temperatures up to 40‹ C. for the final alphamethylstyrene polymerization. Specified dienes are butadiene and isoprene. The final stage may be carried out in the presence of (a) 1 to 10 moles per mole of initiator of styrene, when B is polybutadiene and the medium for the final stage polymerization is alphamethyl styrene, or (b) 1 to 10 weight per cent of the reaction mixture of an ether, e.g. tetrahydrofuran or ethylene glycoldimethylether the polymerization being carried out at below 10‹ C., modifications (a) and (b) improving the linkage of the final A block to the live AB intermediate. The microstructure of the central diene block is typically substantially 1,4-linked, in examples the B blocks containing about 10 to 15% 1,2-structure and approximately equal cis- and trans-1,4 units. The monomers, solvents and additives are in mose cases purified before use by titration against sec.-butyl-lithium or a di-lithiopolydiene.
GB2241173A 1973-05-10 1973-05-10 Method of preparing a thermostable block-copolymer Expired GB1409956A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2241173A GB1409956A (en) 1973-05-10 1973-05-10 Method of preparing a thermostable block-copolymer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2241173A GB1409956A (en) 1973-05-10 1973-05-10 Method of preparing a thermostable block-copolymer

Publications (1)

Publication Number Publication Date
GB1409956A true GB1409956A (en) 1975-10-15

Family

ID=10178941

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2241173A Expired GB1409956A (en) 1973-05-10 1973-05-10 Method of preparing a thermostable block-copolymer

Country Status (1)

Country Link
GB (1) GB1409956A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0457647A1 (en) * 1990-05-16 1991-11-21 Elf Atochem S.A. Process for the preparation of transparent and shock resistant styrene resin

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0457647A1 (en) * 1990-05-16 1991-11-21 Elf Atochem S.A. Process for the preparation of transparent and shock resistant styrene resin
FR2662167A1 (en) * 1990-05-16 1991-11-22 Atochem PROCESS FOR MANUFACTURING TRANSPARENT AND IMPACT RESISTANT STYRENIC RESIN.

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee