GB1414924A - Method of preparing thermostable block-copolymers - Google Patents

Method of preparing thermostable block-copolymers

Info

Publication number
GB1414924A
GB1414924A GB2241273A GB2241273A GB1414924A GB 1414924 A GB1414924 A GB 1414924A GB 2241273 A GB2241273 A GB 2241273A GB 2241273 A GB2241273 A GB 2241273A GB 1414924 A GB1414924 A GB 1414924A
Authority
GB
United Kingdom
Prior art keywords
block
effected
styrene
dione
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
GB2241273A
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 SINT CHESKOGO KAUCH
Original Assignee
VORON VNII SINT CHESKOGO KAUCH
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 SINT CHESKOGO KAUCH filed Critical VORON VNII SINT CHESKOGO KAUCH
Priority to GB2241273A priority Critical patent/GB1414924A/en
Publication of GB1414924A publication Critical patent/GB1414924A/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

Abstract

1414924 Alpha methyl styrene block copolymerization VORONEZHSKY FILIAL VSESOJUZNOGO NAUCHNO-ISSLEDOVATELSKOGO INSTITUTA SINTETICHESKOGO KAUCHUKA IMENIAKADEMIKA 10 May 1973 22412/73 Heading C3P Thermostable block copolymers of the formula A, B, C, where A is a polyalphamethylstyrene block, B is a polyconjugated dione block and C is a polystyrene block, are obtained by a threestage sequential process effected in the presence of sec.-butyl lithium initiator, the initial polymerization of alphamethylstyrene being effected in the monomer itself or in a hydrocarbon solvent at 0‹ to 40‹ C., the subsequent stages forming the B and C blocks being effected in a hydrocarbon solvent at 40‹ to 80‹ C. The latter two stages may be carried out by sequential addition of the diene and later the styrene or by addition of a mixture of the monomers, with the diene being polymerized at 40‹ to 60‹ C. and the styrene subsequently at 60‹ to 80‹ C. The dienes are suitably butadiene or isoprene. The microstructure of the dione portions of the products is predominantly 1,4- with, in examples, about 8 to 12% 1,2-units and approximately equal amounts of cis- and trans-1,4-units. The monomers and solvents are desirably purified, e.g. by titration with the butyl lithium or with dilithiopolydienes.
GB2241273A 1973-05-10 1973-05-10 Method of preparing thermostable block-copolymers Expired GB1414924A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2241273A GB1414924A (en) 1973-05-10 1973-05-10 Method of preparing thermostable block-copolymers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2241273A GB1414924A (en) 1973-05-10 1973-05-10 Method of preparing thermostable block-copolymers

Publications (1)

Publication Number Publication Date
GB1414924A true GB1414924A (en) 1975-11-19

Family

ID=10178956

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2241273A Expired GB1414924A (en) 1973-05-10 1973-05-10 Method of preparing thermostable block-copolymers

Country Status (1)

Country Link
GB (1) GB1414924A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0083168A2 (en) * 1981-12-28 1983-07-06 Mobil Oil Corporation P-methylstyrene-conjugated diene-styrene block copolymers and blends thereof with polystyrene, poly(p-methylstyrene) and copolymers thereof
EP0289917A2 (en) * 1987-05-02 1988-11-09 BASF Aktiengesellschaft Butadiene-styrene block copolymers having an asymmetric construction, their preparation and use in moulding masses

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0083168A2 (en) * 1981-12-28 1983-07-06 Mobil Oil Corporation P-methylstyrene-conjugated diene-styrene block copolymers and blends thereof with polystyrene, poly(p-methylstyrene) and copolymers thereof
EP0083168A3 (en) * 1981-12-28 1983-11-02 Mobil Oil Corporation P-methylstyrene-conjugated diene-styrene block copolymers and blends thereof with polystyrene, poly(p-methylstyrene) and copolymers thereof
EP0289917A2 (en) * 1987-05-02 1988-11-09 BASF Aktiengesellschaft Butadiene-styrene block copolymers having an asymmetric construction, their preparation and use in moulding masses
EP0289917A3 (en) * 1987-05-02 1991-01-23 BASF Aktiengesellschaft Butadiene-styrene block copolymers having an asymmetric construction, their preparation and use in moulding masses

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Legal Events

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