GB783487A - Improvements in or relating to the polymerization of ethylene - Google Patents

Improvements in or relating to the polymerization of ethylene

Info

Publication number
GB783487A
GB783487A GB33606/55A GB3360655A GB783487A GB 783487 A GB783487 A GB 783487A GB 33606/55 A GB33606/55 A GB 33606/55A GB 3360655 A GB3360655 A GB 3360655A GB 783487 A GB783487 A GB 783487A
Authority
GB
United Kingdom
Prior art keywords
lithium aluminium
titanium
polymerization
complex
ethylene
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
GB33606/55A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and 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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB783487A publication Critical patent/GB783487A/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
    • C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Abstract

Catalyst complexes for the polymerization of ethylene (see Group IV (a)) are obtained by reducing a titanium compound, in hydrocarbon solution, with an organometallic or metal hydride reducing agent in the ratio of 0.4 to 1.4, the titanium in the complex being reduced to a valency below 3. The titanium compound may be the tetrachloride or trichloride or tetrapropyl titanate, and the reducing agents specified are lithium aluminium tetra-alkyls, Grignard reagents and metal alkyls, e.g. lithium aluminium tetradecyl and hydride, phenyl magnesium bromide, lithium butyl, tin tetrabutyl and sodium borohydride. The hydrocarbon solvent may be cyclohexane, benzene, hexane, butane, pentane or heptane. The catalyst complex may be formed prior to or during the polymerization.ALSO:A process for the production of solid polyethylene of melt index 0.005 to 3 comprises continuously adding ethylene to a liquid hydrocarbon solvent at 150 DEG to 230 DEG C. and under pressure, in the presence of a catalyst complex obtained by reducing a hydrocarbon solution of a titanium compound with an organometallic or metal hydride reducing agent in the ratio of 0.4 to 1.4, whereby the valency of the titanium in the complex is reduced to below 3, the dissolved polymer being continuously separated, e.g. by precipitation, and removed. The titanium compound may be the tetrachloride or trichloride or tetrapropyl titanate. Reducing agents specified are lithium aluminium tetraalkyls, Grignard reagents and metal alkyls, e.g. lithium aluminium tetradecyl, lithium aluminium hydride, phenyl magnesium bromide, lithium butyl, tin tetrabutyl and sodium borohydride. The hydrocarbon solvent may be cyclohexane, benzene, hexane, butane, pentane or heptane. Other ethylenic monomers such as propylene and butadiene may also be included. The catalyst complex may be formed prior to or during the polymerization and the actual melt index may be controlled by the ratio of the catalyst components or by the temperature used. The presence of hydrogen and oxygen in small quantities may also be used to control the melt index. In the example the ethylene and solvent are purified before use. The products are linear and contain titanium, and find application as pipes, wire-insulation, filaments and paper coatings.
GB33606/55A 1954-11-23 1955-11-23 Improvements in or relating to the polymerization of ethylene Expired GB783487A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US783487XA 1954-11-23 1954-11-23

Publications (1)

Publication Number Publication Date
GB783487A true GB783487A (en) 1957-09-25

Family

ID=22143468

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33606/55A Expired GB783487A (en) 1954-11-23 1955-11-23 Improvements in or relating to the polymerization of ethylene

Country Status (2)

Country Link
DE (1) DE1024715B (en)
GB (1) GB783487A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925410A (en) * 1958-04-03 1960-02-16 Eastman Kodak Co Catalyst containing aluminum, titanium tetrahalide, and alkali metal fluoride and olefin polymerization therewith
US2948712A (en) * 1958-04-03 1960-08-09 Eastman Kodak Co Olefin polymerization catalyst containing aluminium, titanium tetrahalide, and titanium alcoholate
US3040014A (en) * 1959-05-27 1962-06-19 Exxon Research Engineering Co Melt index and brittleness of polypropylene
US3066127A (en) * 1959-09-30 1962-11-27 Shell Oil Co Polymerization process

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2608933A1 (en) * 1976-03-04 1977-09-08 Basf Ag Ethylene polymerisation using Ziegler catalyst system - contg. cyclopentadienyl zirconium cpd., aluminium tri-alkyl cpd. and opt. water
DE2608863A1 (en) * 1976-03-04 1977-09-08 Basf Ag Ethylene polymerisation using Ziegler catalyst system - contg. bis-cyclopentadienyl-titanium di-alkyl cpd., aluminium tri-alkyl cpd. and water

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925410A (en) * 1958-04-03 1960-02-16 Eastman Kodak Co Catalyst containing aluminum, titanium tetrahalide, and alkali metal fluoride and olefin polymerization therewith
US2948712A (en) * 1958-04-03 1960-08-09 Eastman Kodak Co Olefin polymerization catalyst containing aluminium, titanium tetrahalide, and titanium alcoholate
US3040014A (en) * 1959-05-27 1962-06-19 Exxon Research Engineering Co Melt index and brittleness of polypropylene
US3066127A (en) * 1959-09-30 1962-11-27 Shell Oil Co Polymerization process

Also Published As

Publication number Publication date
DE1024715B (en) 1958-02-20

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