GB869137A - Molecular weight control of olefin polymers - Google Patents

Molecular weight control of olefin polymers

Info

Publication number
GB869137A
GB869137A GB2197957A GB2197957A GB869137A GB 869137 A GB869137 A GB 869137A GB 2197957 A GB2197957 A GB 2197957A GB 2197957 A GB2197957 A GB 2197957A GB 869137 A GB869137 A GB 869137A
Authority
GB
United Kingdom
Prior art keywords
catalyst
oxygen
molecular weight
compound
group
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
GB2197957A
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.)
Ruhrchemie AG
Original Assignee
Ruhrchemie AG
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 Ruhrchemie AG filed Critical Ruhrchemie AG
Publication of GB869137A publication Critical patent/GB869137A/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

Abstract

Ethylene is polymerized at a pressure below 100 kg. per sq. cm and at a temperature below 100 DEG C. in the presence of a liquid hydrocarbon reaction medium and a catalyst comprising an organometallic compound and a compound of a metal of Group IV(a), V(a) or VI(a) in which the mol. ratio of the catalyst components is at least 1,5 mols of the organometallic compound per mol. of sub-group (a) metal compound, the catalyst having been prepared by mixing its components together at room temperature for 1 to 5 hours or for 30 to 60 minutes at a temperature of from 30 DEG to 70 DEG C., before being passed to the polymerization zone, and oxygen is introduced into the polymerization zone in an amount of not more than 90 litres per kilogram of catalyst. The oxygen is preferably used in an amount greater than 20 litres per kilogram of catalyst. Specified catalyst components are diethyl aluminium monochloride and titanium tetrachloride. The polymerization is preferably carried out continuously and the oxygen introduced uniformly e.g. as air. The molecular weight of the polymer may be varied from 50,000 to 750,000 according to the quantity of oxygen present. Reference has been directed by the Comptroller to Specifications 824,198, 828,692 and 830,831.
GB2197957A 1956-08-07 1957-07-11 Molecular weight control of olefin polymers Expired GB869137A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER19409A DE1122704B (en) 1956-08-07 1956-08-07 Process for the production of polyethylene

Publications (1)

Publication Number Publication Date
GB869137A true GB869137A (en) 1961-05-31

Family

ID=7400434

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2197957A Expired GB869137A (en) 1956-08-07 1957-07-11 Molecular weight control of olefin polymers

Country Status (4)

Country Link
BE (1) BE559859A (en)
DE (1) DE1122704B (en)
FR (1) FR1179802A (en)
GB (1) GB869137A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4803251A (en) * 1987-11-04 1989-02-07 Union Carbide Corporation Method for reducing sheeting during polymerization of alpha-olefins

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE973626C (en) * 1953-11-17 1960-04-14 Karl Dr Dr E H Ziegler Process for the production of high molecular weight polyethylenes
IT550875A (en) * 1954-11-27

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4803251A (en) * 1987-11-04 1989-02-07 Union Carbide Corporation Method for reducing sheeting during polymerization of alpha-olefins

Also Published As

Publication number Publication date
BE559859A (en)
DE1122704B (en) 1962-01-25
FR1179802A (en) 1959-05-28

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