Claims
- 1. A process for producing olefinic polymers which comprises polymerizing olefins by contacting the olefin monomer under gas or liquid-phase polymerization conditions with a catalyst system comprising:
- (A) a catalyst component consisting essentially of about 1.5-6.0% by weight of titanium, about 10-20% by weight of magnesium, about 40-70% by weight of a halide selected from the group consisting of chlorine, bromine and iodine; about 5-25% by weight of a polycarboxylic ester selected from the group consisting of the esters of aliphatic, aromatics and alicyclic polycarboxylic acids; and about 0.1-2.5% by weight of an organic phosphorus compound selected from the group consisting of hydrocarbon esters of phosphoric acid and phosphorus acid wherein each hydrocarbon group has 1 to 6 carbon atoms, said catalyst component being prepared by a process having the following steps:
- (a) dissolving in a solvent mixture a magnesium halide compound selected from the group consisting of magnesium halide, complexes of magnesium halide with water or alcohol and derivatives of magnesium halide wherein a halogen atom is replaced by a hydrocarboxyl group or a halohydrocarboxyl group; the solvent mixture consisting of an organic epoxy compound, selected from the group consisting of oxides of aliphatic olefins and diolefins, oxides of halogenated aliphatic olefins and diolefins, and glycidyl ethers all having 2 to 8 carbon atoms, and an organic phosphorus compound selected from the group consisting of alkyl phosphates, aryl phosphates, aralkyl phosphates, alkyl phosphites, aryl phosphites and aralkyl phosphites where alkyl has one to four carbon atoms and aryl has six to ten carbon atoms to form a homogeneous solution;
- (b) mixing the homogeneous solution with a liquid titanium compound having the formula TiX.sub.n (OR).sub.4-n wherein X is halogen, R is an alkyl group being identical or different, and n is an integer of 0 to 4;
- (c) adding at least one auxiliary precipitant selected from the group consisting of carboxylic acid anhydrides, carboxylic acids, ethers and ketones to form a precipitate;
- (d) adding a polycarboxylic acid ester when a precipitate appears;
- (e) separating the precipitate from the mixture and treating the separated precipitation with titanium compound, TiX.sub.n (OR).sub.4-n wherein X is halogen, R is a hydrocarbon group and may be identical or different, and n is an integer of from 0 to 4, or a mixture thereof in an inert diluent; and
- (f) washing the treated precipitate with an organic inert diluent; in combination with
- (B) an organic aluminum compound, having the formula:
- Al R.sub.n' X.sub.3-n'
- wherein R is hydrogen, or a hydrocarbonyl group having 1-20 carbon atoms; X is a halogen selected from the group consisting of chlorine, bromine and iodine; and n' is an integer of from 1 to 3.
- 2. A process for producing olefin polymers according to claim 1 wherein the polymerization process is homopolymerization, copolymerization or block copolymerization.
- 3. A process for producing olefin polymers according to claim 1 wherein the polymerization process includes conditions for liquid-phase polymerization or gas phase polymerization, said liquid-phase polymerization being carried out in the present of an inert diluent.
- 4. A process for producing olefin polymers which comprises polymerizing olefins by contacting the olefin monomer with the catalyst component according to claim 1 wherein the catalyst component further includes an organic silicon compound.
- 5. A process for producing olefin polymers according to claim 4 wherein the polymerization process includes conditions for homopolymerization, copolymerization or block copolymerization.
- 6. A process for producing olefin polymers according to claim 4 wherein the polymerization process includes conditions for liquid-phase polymerization or gas-phase polymerization, said liquid-phase polymerization being carried out in the present of an inert diluent.
- 7. A process according to claim 4 wherein the olefin polymer is polypropylene.
Priority Claims (1)
Number |
Date |
Country |
Kind |
85100997 |
Apr 1985 |
CNX |
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Parent Case Info
This is a divisional of co-pending application Ser. No. 06/907,664 filed Sep. 15, 1986 and now U.S. Pat. No. 4,784,983.
Foreign Referenced Citations (2)
Number |
Date |
Country |
581837 |
Aug 1981 |
JPX |
2111066A |
Jun 1983 |
GBX |
Non-Patent Literature Citations (2)
Entry |
Derwent Abstracts, Week 8402, A17, p. 14 (1984). |
European Search Report. |
Divisions (1)
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Number |
Date |
Country |
Parent |
907667 |
Sep 1986 |
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