US3923758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substantially hexane soluble propylene/butene-1 copolymer containing 30 to 75 weight percent butene-1
Assignee: Eastman Kodak Co
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Filing: 1973-07-02
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Granted: 1975-12-02
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Expires: 1993-07-02
Abstract
Abstract An amorphous propylene/butene-1 copolymer containing from about 30 to about 75 weight percent butene-1, and having a melt viscosity of about 100 to 100,000 centipoise at 190*C., a solubility in refluxing hexane of at least 99 weight percent, a solubility in refluxing diethyl ether of at least 60 weight percent, a ring and ball softening point in the range of about 78* to 120*C. and a Differential Scanning Calorimeter melting point not greater than 120*C.
Inventors
- 👤 Jr Edward H Carter
- 👤 Robert E Holliday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:40
CPC Classifications
C; C08; C08F; C08F210/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
72 words
A solution process for preparing an amorphous propylene/butene-1 copolymer which comprises contacting a mixture of propylene and butene-1, said mixture containing about 30 to 75 weight percent butene-1, with a catalyst mixture comprising a trialkyl aluminum or an organopolylithiumaluminum compound and titanium trihalide of the group consisting of HA-TiCl3, A-TiCl3 and AA-TiCl3 at a temperature of 140*0 to 250*C. and a pressure in the range of about atmospheric to about 2,000 psig.
Claim 2
Dependent Claim
72 words
A solution process for preparing an amorphous propylene/butene-1 copolymer which comprises contacting a mixture of propylene and butene-1, said mixture containing about 30 to 75 weight percent butene-1, with a catalyst mixture comprising a trialkyl aluminum or an organopolylithiumaluminum compound and titanium trihalide of the group consisting of HA-TiCl3, A-TiCl3 and AA-TiCl3 at a temperature of 140*0 to 250*C. and a pressure in the range of about atmospheric to about 2,000 psig.
Claim 3
Dependent Claim
14 words
A SOLUTION PROCESS ACCORDING TO CLAIM I WHEREIN SAID TRIALKYL ALUMINUM IS TRIETHYL ALUMINUM.
Claim 4
Dependent Claim
18 words
A solution process according to claim 2 wherein said titanium trihalide is the AA form of titanium trichloride.
Claim 5
Dependent Claim
22 words
A solution process according to claim 3 wherein the ratio of triethyl aluminum to the AA form of titanium trichloride is 0.01-1.0/1.
Claim 6
Dependent Claim
22 words
A solution process according to claim 4 wherein the ratio of triethyl aluminum to the AA form of titanium trichloride is 0.4-0.6/1.
Claim 7
Dependent Claim
21 words
A solution process according to claim 1 wherein said organopolylithiumaluminum compound is the reaction product of lithium butyl and triethyl aluminum.
Claim 8
Dependent Claim
26 words
A solution process according to claim 6 wherein said activated titanium trihalide is the HA form of titanium trichloride or the AA form of titanium trichloride.
Claim 9
Dependent Claim
22 words
A solution process according to claim 7 wherein the mole ratio of lithium butyl to triethyl aluminum to titanium trichloride is 0.01-0.05/0.1-1.0/1.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |