GB828803A - Process for polymerizing conjugated 1.3-dienes - Google Patents

Process for polymerizing conjugated 1.3-dienes

Info

Publication number
GB828803A
GB828803A GB19732/56A GB1973256A GB828803A GB 828803 A GB828803 A GB 828803A GB 19732/56 A GB19732/56 A GB 19732/56A GB 1973256 A GB1973256 A GB 1973256A GB 828803 A GB828803 A GB 828803A
Authority
GB
United Kingdom
Prior art keywords
butadiene
mercaptan
methyl
polymerization
styrene
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
GB19732/56A
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.)
Monsanto Chemicals Ltd
Monsanto Chemical Co
Original Assignee
Monsanto Chemicals Ltd
Monsanto Chemical Co
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 Monsanto Chemicals Ltd, Monsanto Chemical Co filed Critical Monsanto Chemicals Ltd
Publication of GB828803A publication Critical patent/GB828803A/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
    • C08F36/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
    • C08F36/02—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
    • C08F36/04—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated

Abstract

A process for the emulsion polymerization of a conjugated diene having the general formula CH2=CR1-CR2=CHR3 in which R1 and R2 are hydrogen atoms or methyl or ethyl groups and R3 is a hydrogen atom or a methyl group, in the presence of a free radical-generating catalyst, comprises adding to the polymerization mixture after at least 70% conversion to polymers has taken place, an aliphatic mercaptan having at least 8 carbon atoms in the molecule in an amount of at least 0.02 part by weight for each 100 parts of monomer or monomers originally charged. Specified polymers are those of 1,3-butadiene, 1,3-pentadiene, 2-methyl 1,3-butadiene, 2-ethyl-1,3-butadiene and 2,3-dimethyl-1,3-butadiene: and these monomers may be copolymerized with styrene para-chloro-styrene, acrylic acid, methacrylic acid and esters and nitriles of acrylic and methacrylic acids. The mercaptan preferably has 8-16 carbon atoms and has the mercapto group attached to a tertiary carbon atom. In examples 0.1 to 0.2 part of tretiary-dodecyl-mercaptan is added in addition to any that may already be present when the polymerization had essentially stopped. Stearic acid-potassium hydroxide, potassium chloride and potassium persulphate may also be present in the emulsion mix. Reference has been directed by the Comptroller to Specification 625,647.
GB19732/56A 1955-06-27 1956-06-26 Process for polymerizing conjugated 1.3-dienes Expired GB828803A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US828803XA 1955-06-27 1955-06-27

Publications (1)

Publication Number Publication Date
GB828803A true GB828803A (en) 1960-02-24

Family

ID=22174041

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19732/56A Expired GB828803A (en) 1955-06-27 1956-06-26 Process for polymerizing conjugated 1.3-dienes

Country Status (1)

Country Link
GB (1) GB828803A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2849414A1 (en) * 1978-05-10 1979-11-15 Gen Tire & Rubber Co METHOD FOR Aqueous RADICAL EMULSION POLYMERIZATION
US4369299A (en) 1977-11-11 1983-01-18 Asahi Kasei Kogyo Kabushiki Kaisha Acrylic resin having excellent solvent resistance and moldability
US5807941A (en) * 1994-08-29 1998-09-15 Nippon Zeon Co., Ltd. Unsaturated nitrile-conjugated diene copolymer process for producing same and vulcanizable rubber composition

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4369299A (en) 1977-11-11 1983-01-18 Asahi Kasei Kogyo Kabushiki Kaisha Acrylic resin having excellent solvent resistance and moldability
DE2849414A1 (en) * 1978-05-10 1979-11-15 Gen Tire & Rubber Co METHOD FOR Aqueous RADICAL EMULSION POLYMERIZATION
US5807941A (en) * 1994-08-29 1998-09-15 Nippon Zeon Co., Ltd. Unsaturated nitrile-conjugated diene copolymer process for producing same and vulcanizable rubber composition

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