GB1422030A - Preparation of block copolymers for sheets of films - Google Patents

Preparation of block copolymers for sheets of films

Info

Publication number
GB1422030A
GB1422030A GB5664473A GB5664473A GB1422030A GB 1422030 A GB1422030 A GB 1422030A GB 5664473 A GB5664473 A GB 5664473A GB 5664473 A GB5664473 A GB 5664473A GB 1422030 A GB1422030 A GB 1422030A
Authority
GB
United Kingdom
Prior art keywords
styrene
butadiene
films
sheets
polymerization
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
GB5664473A
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
Priority to GB5664473A priority Critical patent/GB1422030A/en
Publication of GB1422030A publication Critical patent/GB1422030A/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
    • C08F297/042—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

1422030 Block copolymerization DENKI KAGAKU KOGYO KK 6 Dec 1973 56644/73 Heading C3P Block copolymers are obtained by (a) polymerizing a mixture of a conjugated diene and 30 to 70% of styrene or an alkyl-substituted styrene in a non-polar solvent in the presence of a polyfunctional organolithium initiator to at least 40% diene conversion and (b) adding further styrene monomer, or a mixture thereof with up to 5% of a conjugated diene as a polymerization retardent, in sufficient amounts to ensure a final copolymer containing 70 to 85% styrene monomer, and completing the polymerization. In examples butadiene-styrene mixtures are polymerized using butadiene oligomer dilithium in benzene, followed by styrene or mixtures thereof with butadiene or isoprene, including comparative procedures just outside the above limits. Sheets and films with good low temperature impact strength may be formed from the polymers and may be used for packing refrigerated foodstuffs.
GB5664473A 1973-12-06 1973-12-06 Preparation of block copolymers for sheets of films Expired GB1422030A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5664473A GB1422030A (en) 1973-12-06 1973-12-06 Preparation of block copolymers for sheets of films

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5664473A GB1422030A (en) 1973-12-06 1973-12-06 Preparation of block copolymers for sheets of films

Publications (1)

Publication Number Publication Date
GB1422030A true GB1422030A (en) 1976-01-21

Family

ID=10477163

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5664473A Expired GB1422030A (en) 1973-12-06 1973-12-06 Preparation of block copolymers for sheets of films

Country Status (1)

Country Link
GB (1) GB1422030A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1333043A1 (en) * 2000-11-10 2003-08-06 Denki Kagaku Kogyo Kabushiki Kaisha Block copolymer, composition thereof, and film made thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1333043A1 (en) * 2000-11-10 2003-08-06 Denki Kagaku Kogyo Kabushiki Kaisha Block copolymer, composition thereof, and film made thereof
EP1333043A4 (en) * 2000-11-10 2004-08-04 Denki Kagaku Kogyo Kk Block copolymer, composition thereof, and film made thereof
US6841261B2 (en) 2000-11-10 2005-01-11 Denki Kagaku Kogyo Kabushiki Kaisha Block copolymer, composition thereof, and film made thereof
US7189462B2 (en) 2000-11-10 2007-03-13 Denki Kagaku Kogyo Kabushiki Kaisha Block copolymer, its composition and film made of it

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19931205