GB938071A - Polymerization of isoprene - Google Patents

Polymerization of isoprene

Info

Publication number
GB938071A
GB938071A GB1292062A GB1292062A GB938071A GB 938071 A GB938071 A GB 938071A GB 1292062 A GB1292062 A GB 1292062A GB 1292062 A GB1292062 A GB 1292062A GB 938071 A GB938071 A GB 938071A
Authority
GB
United Kingdom
Prior art keywords
polymer
isoprene
polymerizate
catalyst
reducing
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
GB1292062A
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.)
Phillips Petroleum Co
Original Assignee
Phillips Petroleum 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 Phillips Petroleum Co filed Critical Phillips Petroleum Co
Publication of GB938071A publication Critical patent/GB938071A/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
    • C08F136/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
    • C08F136/02—Homopolymers 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
    • C08F136/04—Homopolymers 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
    • C08F136/08—Isoprene

Landscapes

  • 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)

Abstract

High polymers of cis-polyisoprene are made by polymerizing isoprene in an inert hydrocarbon diluent with an organolithium catalyst and, reducing the induction period by heating the polymerizable mixture for a period of at least 5 minutes and at a temperature, e.g. 60 DEG to 110 DEG C., insufficient to convert more than one weight per cent of isoprene to the polymer, and then reducing the temperature, e.g. below 60 DEG C., and completing the polymerization. The Specification contains a long list of catalysts. The exemplified catalyst is lithium-methylnaphthalene. The organolithium catalyst is generally formed in a polar solvent which is replaced by a hydrocarbon prior to incorporation in the polymerizable mixture. The polymer is recovered from the polymerizate by conventional techniques, e.g. addition of an alcohol, and an antioxidant. The polymerizate prior to treatment for recovery of the polymer may be aftertreated to introduce functional groups such as -COOH, or -SH.
GB1292062A 1961-09-11 1962-04-04 Polymerization of isoprene Expired GB938071A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13701461A 1961-09-11 1961-09-11

Publications (1)

Publication Number Publication Date
GB938071A true GB938071A (en) 1963-09-25

Family

ID=22475431

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1292062A Expired GB938071A (en) 1961-09-11 1962-04-04 Polymerization of isoprene

Country Status (1)

Country Link
GB (1) GB938071A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5958820A (en) * 1995-04-04 1999-09-28 Bayer Ag Gas-phase polymerisation of conjugated dienes in the presence of rare earth allyl compounds

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5958820A (en) * 1995-04-04 1999-09-28 Bayer Ag Gas-phase polymerisation of conjugated dienes in the presence of rare earth allyl compounds

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