GB951579A - Process for preparing polymers of propylene with regulated molecular weight and isotacticity - Google Patents

Process for preparing polymers of propylene with regulated molecular weight and isotacticity

Info

Publication number
GB951579A
GB951579A GB4429862A GB4429862A GB951579A GB 951579 A GB951579 A GB 951579A GB 4429862 A GB4429862 A GB 4429862A GB 4429862 A GB4429862 A GB 4429862A GB 951579 A GB951579 A GB 951579A
Authority
GB
United Kingdom
Prior art keywords
propylene
catalyst
titanium trichloride
molecular weight
polymerization
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
GB4429862A
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.)
DEPUTY MINISTER OF MINISTE
Original Assignee
DEPUTY MINISTER OF MINISTE
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 DEPUTY MINISTER OF MINISTE filed Critical DEPUTY MINISTER OF MINISTE
Publication of GB951579A publication Critical patent/GB951579A/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
    • C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F110/04—Monomers containing three or four carbon atoms
    • C08F110/06—Propene
    • 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
    • C08F2410/00—Features related to the catalyst preparation, the catalyst use or to the deactivation of the catalyst
    • C08F2410/04—Dual catalyst, i.e. use of two different catalysts, where none of the catalysts is a metallocene

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

Polypropylene having a molecular weight between 50,000 and 1,060,000 and having an isotacity between 50 and 100% is prepared by polymerizing propylene in a pure aliphatic hydrocarbon or in fractions of aliphatic benzines using a catalyst comprising titanium trichloride or titanium trichloride/tetrachloride mixtures and an aluminium alkyl or alkyls, characterized in that (a) a partial pressure of hydrogen varying between 0 and approximately 2 atmospheres is imposed on the system, (b) the polymerization temperature varies between 40 DEG C. and approximately 100 DEG C., (c) titanium tetrachloride is added to titanium trichloride in amount between 0 and 100% and (d) the catalyst components are removed and a partial or complete extraction of the atactic polymer fraction is carried out at the appropriate temperature using the solvent that was used as the polymerization medium. The polymerization pressure is preferably 5 to 15 atmospheres. After the reaction mass has been filtered to remove part of the solid atactic polymer fraction, the reaction mass is placed in an autoclave and is purified by adding a fresh quantity of solvent containing alcohol or acetone. In the examples propylene is polymerized in an n-heptane fraction of extraction benzine using as catalyst TiCl3 or TiCl3/TiCl4 and (C2H5)3Al or (C2H5)2AlCl either in the presence or absence of hydrogen.
GB4429862A 1962-08-08 1962-11-23 Process for preparing polymers of propylene with regulated molecular weight and isotacticity Expired GB951579A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RO4561962 1962-08-08

Publications (1)

Publication Number Publication Date
GB951579A true GB951579A (en) 1964-03-04

Family

ID=20086399

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4429862A Expired GB951579A (en) 1962-08-08 1962-11-23 Process for preparing polymers of propylene with regulated molecular weight and isotacticity

Country Status (1)

Country Link
GB (1) GB951579A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989003847A1 (en) * 1987-10-28 1989-05-05 Eastman Kodak Company Catalysts for the preparation of amorphous copolymers of propylene and olefins

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989003847A1 (en) * 1987-10-28 1989-05-05 Eastman Kodak Company Catalysts for the preparation of amorphous copolymers of propylene and olefins

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