US3764591A
Expired / Lapsed
US
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Process for polymerization of {60 olefin
Assignee: Toho Titanium Co Ltd
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Filing: 1971-12-28
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Granted: 1973-10-09
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Expires: 1991-12-28
Abstract
Abstract Alpha -OLEFIN POLYMERIZATION IS EFFECTED IN THE PRESENCE OF A CATALYST COMPRISING: (1) AN ORGANO ALUMINUM COMPOUND, AND (2) A COMPOUND PREPARED BY MILLING A HALOGEN COMPOUND OF TITANIUM, WHEREIN SAID TITANIUM ION HAS A VALANCE OF LESS THAN THE MAXIMUM VALENCE, WITH AN Alpha , Beta -UNSATURATED CARBOXYLIC ESTER AND THEREAFTER TREATING WITH 0.1 - 5 MOLE PERCENT OF OXYGEN, BASED ON SAID TITANIUM COMPOUND.
Inventors
- 👤 Y Hotta
- 👤 M Fujii
- 👤 K Miyoshi
- 👤 Y Iwasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:53
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/906
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
45 words
The process for polymerization according to claim 1, wherein the organo aluminum compound is selected from the group consisting of trialkyl aluminum, dialkyl aluminum halide, alkyl aluminum dihalide, dialkyl aluminum alkoxide, alkyl aluminum alkoxy halide, alkyl aluminum sesquihalide, aryl aluminum compounds and alkylaryl aluminum compounds.
Claim 2
Dependent Claim
46 words
The process of polymerization according to claim 1, wherein said Alpha , Beta -unsaturated carboxylic ester is selected from the group consisting of acrylic esters, substituted acrylic esters and unsaturated polyvalent carboxylic esters, wherein the alcohol component for the ester is a monovalent lower alkanol radical.
Claim 3
Dependent Claim
17 words
The process for polymerization according to claim 1, wherein said oxygen treatment occurs before the milling operation.
Claim 4
Dependent Claim
17 words
The process for polymerization according to claim 1, wherein said oxygen treatment occurs after the milling operation.
Claim 5
Dependent Claim
77 words
A catalyst which is useful for the polymerization of Alpha -olefins which comprises (1) an organo aluminum compound and (2) a compound prepared by milling a halogen compound of titanium, said titanium having a valence of less than its maximum valence, with 0.1 - 50 mole percent, by weight, based on the titanium compound of an Alpha , Beta -unsaturated carboxylic ester, and treating with 0.1 - 5 mole percent of oxygen based on the titanium compound.
Claim 6
Dependent Claim
42 words
The catalyst of claim 6, wherein the organo aluminum compound is selected from the group consisting of trialkyl aluminum, dialkyl aluminum halide, alkyl aluminum dihalide, dialkyl aluminum alkoxide, alkyl aluminum alkoxy halide, alkyl aluminum sesquihalide, aryl aluminum compounds and alkylaryl aluminum compounds.
Claim 7
Dependent Claim
42 words
The catalyst of claim 6, wherein said Alpha , Beta -unsaturated carboxylic ester is selected from the group consisting of acrylic esters, substituted acrylic esters and unsaturated polyvalent carboxylic esters, wherein the alcohol component for the esters is monovalent lower alkanol radical.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |