US4404342A
Expired / Lapsed
US
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Process for preparing a copolymer
Assignee: Eneos Corp
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Filing: 1981-08-31
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Granted: 1983-09-13
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Expires: 2001-08-31
Abstract
Abstract According to this invention, there is provided a process for preparing a low-crystalline soft or semi-hard copolymer, characterized in that 90 to 98 mole % of propylene, 0.2 to 9 mole % of ethylene and 0.2 to 9 mole % of a straight-chained ( alpha -olefin having not less than four carbon atoms are copolymerized using a catalyst, said catalyst comprising (1) a solid substance containing magnesium and titanium, (2) an organometallic compound and (3) an electron donor.
Inventors
- 👤 Mituji Miyoshi
- 👤 Kazuo Matsuura
- 👤 Yoshio Tajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:16
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/04; C08F210/06; Y; Y10; Y10S; Y10S526/00; Y10S526/906
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
138 words
A process for preparing a low crystalline soft or semi-hard copolymer having a haze value of up to 30%, characterized in that 90 to 98 mole% of propylene, 0.2 to 5 mole% of ethylene and 0.2 to 5 mole% of a straight-chained α-olefin having from four to eighteen carbon atoms are copolymerized using a catalyst at a temperature in the range of from 20° to 300° C. and at a pressure in the range of from atmospheric pressure to 70 Kg/Cm 2 .G, said catalyst comprising (1) a solid substance containing magnesium and titanium (2) an organometallic compound of Group I-IV of the Periodic Table and (3) at least 0.05 mole based on the amount of magnesium (gram atom) of an electron donor selected from the group consisting of ethers, ketones, organic acid esters, acid halides, and nitriles.
Claim 2
Dependent Claim
138 words
A process for preparing a low crystalline soft or semi-hard copolymer having a haze value of up to 30%, characterized in that 90 to 98 mole% of propylene, 0.2 to 5 mole% of ethylene and 0.2 to 5 mole% of a straight-chained α-olefin having from four to eighteen carbon atoms are copolymerized using a catalyst at a temperature in the range of from 20° to 300° C. and at a pressure in the range of from atmospheric pressure to 70 Kg/Cm 2 .G, said catalyst comprising (1) a solid substance containing magnesium and titanium (2) an organometallic compound of Group I-IV of the Periodic Table and (3) at least 0.05 mole based on the amount of magnesium (gram atom) of an electron donor selected from the group consisting of ethers, ketones, organic acid esters, acid halides, and nitriles.
Claim 3
Dependent Claim
59 words
A process according to claim 1, in which said solid substance consists of a titanium compound attached to an inorganic solid carrier, said inorganic solid carrier being metallic magnesium, magnesium hydroxide, magnesium carbonate, magnesium oxide, magnesium chloride, or a double salt, double oxide, carbonate, chloride or hydroxide containing a metal selected from silicon, aluminum and calcium, and magnesium atom.
Claim 4
Dependent Claim
35 words
A process according to claim 2, in which said inorganic solid carrier is treated or reacted with an oxygen-containing compound, a sulfur-containing compound, a hydrocarbon or a halogen-containing substance before attachment thereto the titanium compound.
Claim 5
Dependent Claim
43 words
A process according to claim 3, in which said oxygen-containing compound is alcohol, aldehyde, ketone, ether, carboxylic acid, or a derivative thereof, said sulfur-containing compound is thiophene or thiol, said hydrocarbon is an aromatic hydrocarbon and said halogen-containing substance is a halogenated hydrocarbon.
Claim 6
Dependent Claim
23 words
A process according to claim 1, in which said solid substance is the reaction product of an organomagnesium compound and a titanium compound.
Claim 7
Dependent Claim
19 words
A process according to claim 1, in which said organometallic compound is an organoaluminum compound or an organozinc compound.
Claim 8
Dependent Claim
27 words
A process according to claim 1, in which said organometallic compound is used in an amount of 0.1 to 1000 moles per mole of the titanium compound.
Claim 9
Dependent Claim
24 words
A process according to claim 1, in which the whole or a part of said electron donor is fixed to said solid substance (1).
Claim 10
Dependent Claim
26 words
A process according to claim 1, in which the whole or a part of said electron donor forms an addition product with said organometallic compound (2).
Claim 11
Dependent Claim
50 words
A process according to claim 1, in which the remainder of the electron donor except the portion fixed to the solid substance (1) and/or the remainder of the electron donor except the portion used as the addition product with the organometallic compound (2) are (is) added into the polymerization system.
Claim 12
Dependent Claim
33 words
A process according to claim 1, in which the total amount of the electron donor present in the catalyst system is from 0.05 to 10 moles based on the amount of magnesium (gram-atom).
Claim 13
Dependent Claim
20 words
A process according to claim 1, in which said straight-chained α-olefin is butene-1, pentene-1, hexene-1, heptene-1, octene-1, -nonene-1 or dodecene-1.
Claim 14
Dependent Claim
18 words
A process according to claim 1, in which the copolymerization is carried out in the presence of hydrogen.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |