GB818919A - Irradiation of polymeric compounds - Google Patents

Irradiation of polymeric compounds

Info

Publication number
GB818919A
GB818919A GB37436/55A GB3743655A GB818919A GB 818919 A GB818919 A GB 818919A GB 37436/55 A GB37436/55 A GB 37436/55A GB 3743655 A GB3743655 A GB 3743655A GB 818919 A GB818919 A GB 818919A
Authority
GB
United Kingdom
Prior art keywords
isobutylene
copolymer
solvent
vinyl
toluene
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
GB37436/55A
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.)
ExxonMobil Technology and Engineering Co
Original Assignee
Exxon Research and Engineering Co
Esso Research and Engineering 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 Exxon Research and Engineering Co, Esso Research and Engineering Co filed Critical Exxon Research and Engineering Co
Publication of GB818919A publication Critical patent/GB818919A/en
Expired legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
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    • C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
    • 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
    • C08F8/00—Chemical modification by after-treatment
    • C08F8/50—Partial depolymerisation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/28—Treatment by wave energy or particle radiation
    • 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
    • C08F2810/00—Chemical modification of a polymer
    • C08F2810/10—Chemical modification of a polymer including a reactive processing step which leads, inter alia, to morphological and/or rheological modifications, e.g. visbreaking
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • C08J2323/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
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    • C10M2201/04—Elements
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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Lubricants (AREA)

Abstract

The molecular weight of a homopolymer or copolymer of isobutylene is reduced by exposing it to high-energy ionizing radiation, preferably gamma rays, in the presence of a solvent for the polymer. The copolymer may be derived from isobutylene and isoprene, styrene, vinyl toluene, a vinyl ether, butadiene, maleic anhydride, vinyl trichlorosilane, or acrylonitrile. The solvent may be a mineral lubricating oil, naphtha, benzene, toluene or heptane. Specification 818,920 is referred to.ALSO:The molecular weight of a homopolymer or copolymer of isobutylene is reduced by exposing it to high-energy ionizing radiation, preferably gamma rays, in the presence of a solvent for the polymer. The copolymer may be derived from isobutylene and isoprene, styrene, vinyl toluene, a vinyl ether, butadiene, maleic anhydride, vinyl trichlorosilane or acrylonitrile. The solvent may be a mineral lubricating oil, naphtha, benzene, toluene or heptane. Specification 818,920, [Group III], is referred to.
GB37436/55A 1955-02-16 1955-12-30 Irradiation of polymeric compounds Expired GB818919A (en)

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GB15803/58A Expired GB818920A (en) 1955-02-16 1955-12-30 Lubricating compositions
GB37436/55A Expired GB818919A (en) 1955-02-16 1955-12-30 Irradiation of polymeric compounds

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GB15803/58A Expired GB818920A (en) 1955-02-16 1955-12-30 Lubricating compositions

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GB (2) GB818920A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3121674A (en) * 1959-10-30 1964-02-18 Exxon Research Engineering Co Irradiation of polymeric compounds

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156240A (en) * 1961-09-08 1964-11-10 Lehn & Fink Products Corp Suppository applicator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3121674A (en) * 1959-10-30 1964-02-18 Exxon Research Engineering Co Irradiation of polymeric compounds

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GB818920A (en) 1959-08-26
DE1081586B (en) 1960-05-12

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