Claims
- 1. A process for producing an olefin copolymer rubber, which comprises:
- copolymerizing ethylene, at least one .alpha.-olefin and at least one non-conjugated diene in a slurried state in a liquid-state .alpha.-olefin with substantially no solvent being present for the resulting copolymer in the presence of a catalyst consisting of an organocaluminum compound selected from the group consisting of a trialkylaluminum and a dialkylaluminum monohalide and a modified vanadium compound obtained by contacting a vanadium compound with at least one modifying salicylate compound of the formula: ##STR4## wherein R is a C.sub.1-20 alkyl group.
- 2. The process according to claim 1, wherein the .alpha.-olefin has 3 to 12 carbon atoms.
- 3. The process according to claim 1, wherein the .alpha.-olefin is selected from the group consisting of propylene, 1-butene, 4-methylpentene-1, hexene-1 and octene-1.
- 4. The process acording to claim 1, wherein the .alpha.-olefin is propylene, 1-butene or a mixture thereof.
- 5. The process according to claim 1, wherein the non-conjugated diene is selected from the group consisting of dicyclopentadiene, tricyclopentadiene, 5-methyl-2,5-nobornadiene, 5-methylene-2-norbornene, 5-ethylidene-2-norbornene, 5-isopropylidene-2-norbornene, 5-isopropenyl-2-norborene, 5-(1-butenyl)-2-norbornene, cyclooctadiene, vinylcyclohexene, 1,5,9-cyclododecatriene, 6-methyl-4,7,8,9-tetrahydroindene, 2,2-dicyclopentenyl, trans-1,2-divinylcyclobutane, 1,4-hexadiene, 2-methyl-1,4-hexadiene and 1,6-octadiene.
- 6. The process according to claim 1, wherein the non-conjugated diene is 5-ethylidene-2-norbornene, dicyclopentadiene or a mixture thereof.
- 7. The process according to claim 1, wherein the trialkylaluminum is triethylaluminum, triisobutylaluminum or trioctylaluminum.
- 8. The process according to claim 1, wherein the dialkylaluminum monohalide is diethylaluminum monochloride, diethylaluminum monobromide or diisobutylaluminum monochloride.
- 9. The process according to claim 1, wherein the alkyl salicylate is methyl salicylate, ethyl salicylate, butyl salicylate, octyl salicylate, 2-ethylhexyl salicylate or dodecyl salicylate.
- 10. The process according to claim 1, wherein the vanadium compound is vanadium tetrachloride, vanadium oxytrichloride, vanadium triacetylacetonate, a reaction product between vanadium oxytrichloride and an alcohol, vanadyl triethoxide, vanadyl tri-n-butoxide, vanadyl di-n-butoxymonochloride, or vanadyl ethoxydichloride.
- 11. The process according to claim 1, wherein the vanadium compound is vanadium oxytrichloride or oxyvanadium diacetylacetonate.
- 12. The process according to claim 1, wherein the modified vandium compound is obtained by adding said modifying salicylate compound to a vanadium compound in a solvent with stirring and then subjecting the resulting mixture to stirring at -60.degree. C. to 100.degree. C. for a given period of time.
- 13. The process according to claim 12, where the amount of said modifying salicylate compound added is 0.05 to 2.0 moles per mole of the vanadium compound.
- 14. The process according to claim 12, wherein the modification of the vanadium compound is conducted in the presence of the monomers to be used in the polymerization reaction.
- 15. The process according to claim 1, wherein the copolymerization is conducted at -50.degree. C. to 100.degree. C.
- 16. The process according to claim 1, wherein the copolymerization is conducted at -20.degree. C. to 60.degree. C.
- 17. The process according to claim 1, wherein the amount of the organoaluminum compound added is 1 to 100 moles per mole of the vanadium compound.
- 18. The process according to claim 1, wherein said dialkylaluminum monohalide is a dialkylaluminum monochloride.
Priority Claims (1)
Number |
Date |
Country |
Kind |
59-38671 |
Mar 1984 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 702,062, filed Feb. 15, 1985, now abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (2)
Number |
Date |
Country |
1445280 |
Oct 1968 |
DEX |
47-15694 |
May 1972 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
702062 |
Feb 1985 |
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