Claims
- 1. A process for the production of a polymer or copolymer of an unsaturated monomer wherein at least one ethylenically unsaturated hydrocarbon monomer is contacted, under polymerisation conditions, with a polymerisation catalyst which is the product obtained by mixing together
- (1) A transition metal composition; and
- (2) an organic compound of aluminium or of a metal of Group IIA of the Periodic Table or a complex of an organic compound of a metal of Group IA or Group IIA of the Periodic Table together with an organic aluminium compound,
- wherein the transition metal composition which is component, (1) of the polymerisation catalyst is the product obtained by a process in which a solid support material which is a metal halide is suspended in a liquid medium which is a liquid hydrocarbon or a liquid halohydrocarbon, the suspension is spray-dried, the spray-dried support material is collected and the collected spray-dried support material is contacted with at least one compound of a transition metal of Group IVA, VA, or VIA of the Periodic Table.
- 2. The process of claim 1 wherein the polymerisation catalyst also inclues a Lewis Base compound.
- 3. The process of claim 1 wherein propylene is polymerised in the gas phase.
- 4. The process of claim 1 wherein component (1) of the polymerisation catalyst is the product obtained by a process in which the metal halide which is the solid support material is a magnesium halide.
- 5. The process of claim 4 wherein component (1) of the polymerisation catalyst is the product obtained by a process in which the metal halide which is the solid support material is a magnesium chloride which has been contacted with an ester of a carboxylic acid containing an aromatic group.
- 6. The process of claim 1 wherein component (1) of the polymerisation catalyst is the product obtained by a process in which the suspension is spray-dried by passing the suspension through an atomizer to form a spray of droplets, contacting the droplets with a stream of a gas which is essentially oxygen- and water vapour-free and is at a temperature of at least 80.degree. C., evaporating liquid medium from the droplets and collecting a separated solid product.
- 7. The process of claim 1 where component (1) of the polymerisation catalyst is the product obtained by a process in which the suspension which is spray-dried also contains an attrition inhibitor to which renders the spray-dried solid more resistant to attrition.
- 8. The process of claim 7 wherein component (1) of the polymerisation catalyst is the product obtained by a process in which the suspension contains the attrition inhibitor in an amount of from 0.5% up to 10% by weight of the attrition inhibitor relative to the solid support material present in the suspension.
- 9. The process of claim 1 wherein component (1) of the polymerisation catalyst is the product obtained by a process in which, after spray-drying, the collected spray-dried solid support material is subject to at least one contacting step with titanium tetrachloride.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8124150 |
Aug 1981 |
GBX |
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Parent Case Info
This is a division of application Ser. No. 405,984 filed Aug. 6, 1982 now U.S. Pat. No. 4,465,782.
US Referenced Citations (9)
Foreign Referenced Citations (4)
Number |
Date |
Country |
1527736 |
Oct 1978 |
GBX |
2006227 |
May 1979 |
GBX |
1559194 |
Jan 1980 |
GBX |
15048 |
Jan 1980 |
GBX |
Divisions (1)
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Number |
Date |
Country |
Parent |
405984 |
Aug 1982 |
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