GB1258893A - - Google Patents

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Publication number
GB1258893A
GB1258893A GB1258893DA GB1258893A GB 1258893 A GB1258893 A GB 1258893A GB 1258893D A GB1258893D A GB 1258893DA GB 1258893 A GB1258893 A GB 1258893A
Authority
GB
United Kingdom
Prior art keywords
catalyst
butyl lithium
trichloropyrimidine
reacted
lithium
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
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 filed Critical
Publication of GB1258893A publication Critical patent/GB1258893A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
    • C08C19/00—Chemical modification of rubber
    • C08C19/30—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule
    • C08C19/42—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups
    • C08C19/44—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups of polymers containing metal atoms exclusively at one or both ends of the skeleton

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Abstract

1,258,893. Increasing the molecular weight of diene polymers. INTERNATIONAL SYNTHETIC RUBBER CO. Ltd. 15 Jan., 1969 [15 Jan., 1968], No. 2054/68. Heading C3P. [Also in'Division C2] A method for increasing the molecular weight of conjugated diene homopolymers or copolymers prepared from monomers containing not more than 0À2% by weight of acetylenic or allenic impurities by means of an organometallic catalyst containing a metal of Group I A or II A of the Periodic Table comprises adding to the live polymerization system one or more heteroaromatic compounds each containing at least one labile atom or group,-the molar ratio of the heteroaromatic compound to the organometallic catalyst lying in the range 0À01 to 10. Specified catalysts are n-butyl lithium, phenyl lithium, benzyl lithium, dilithium naphthyl, isopropyl potassium, phenyl sodium, diethyl magnesium and diethyl beryllium. The labile atom or group in the heteroaromatic compound is, e.g., halogen, alkoxy, aryloxy, tert.-amine and cyanide, suitable compounds including 2,4,6-trichloro, tribromo, triiodo, or triethoxypyridine, 1,3,6 - tribromoisoquinoline, 2,4,5- tribromoquinoline, 3,4,5 - trichloropyridazine, 2,4,6 - trichloropyrimidine, 2,3,6 - triethoxypyrazine, 2,5,6 - tribromopyrazine, 2,3,6 - trichloroquinoxaline, 2,4,6 - trichlorotriazine, 1,3,5- or 2,4,5 - trichloroimidazole, 2,4 - dichlorothiazole, 2,5 - diiodofuran, 2 - chlorothiazole and 2 - bromopyrazine. In examples, (a) butadiene is polymerized using n-butyl lithium as catalyst, the resulting polymer being reacted with cyanuryl chloride, 2,4,6-trichloropyrimidine, 2,4,6 - trichloropyridine, 2,3,6 - triethoxypyrazine, diiodofuran, 2-chloropyrimidine or 2-bromoquinoline, (b) butadiene and styrene are copolymerized using a n-butyl lithium/diethyleneglycol dimethyl ether catalyst, the resulting copolymer being reacted with cyanuryl chloride or 2,4,6-trichloropyrimidine and (c) isoprene is polymerized using n-butyl lithium as catalyst, the resulting polymer being reacted with cyanuryl chloride or 2,4-dichlorothiazole.
GB1258893D 1968-01-15 1968-01-15 Expired GB1258893A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB205468 1968-01-15

Publications (1)

Publication Number Publication Date
GB1258893A true GB1258893A (en) 1971-12-30

Family

ID=9732795

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1258893D Expired GB1258893A (en) 1968-01-15 1968-01-15

Country Status (2)

Country Link
DE (1) DE1901900A1 (en)
GB (1) GB1258893A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7723440B2 (en) 2002-08-30 2010-05-25 Bridgestone Corporation Functionalized polymers and improved vulcanizates therefrom
CN113831512A (en) * 2021-09-22 2021-12-24 中山大学 Polynitrogen conjugated microporous polymer and preparation method and application thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4935471A (en) * 1987-10-15 1990-06-19 The Goodyear Tire & Rubber Company Capped polydienes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7723440B2 (en) 2002-08-30 2010-05-25 Bridgestone Corporation Functionalized polymers and improved vulcanizates therefrom
US8207275B2 (en) 2002-08-30 2012-06-26 Bridgestone Corporation Functionalized polymers and improved vulcanizates therefrom
CN113831512A (en) * 2021-09-22 2021-12-24 中山大学 Polynitrogen conjugated microporous polymer and preparation method and application thereof

Also Published As

Publication number Publication date
DE1901900A1 (en) 1969-09-11

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees