Patent US4039632A successfully refreshed from Google Patents.
US4039632A
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Preparation of block copolymers
Assignee: Phillips Petroleum Co
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Filing: 1976-04-30
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Granted: 1977-08-02
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Expires: 1996-04-30
Abstract
Abstract Block copolymers and the processes of preparing them are disclosed wherein alpha-olefins and/or mixtures of alpha-olefins are alternately polymerized in the presence of a catalyst comprising a titanium halide and an aluminum alkyl compound.
Inventors
- 👤 James T. Edmonds, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:45
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06; C08F297/08; C08F10/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
57 words
A block copolymer comprising first and second adjacent polymer blocks, each of which is formed from one alpha-olefin having the formula: CH.sub.2 = CHR wherein R is selected from the group consisting of hydrogen and linear alkyl radicals containing 1 to 6 carbon atoms, said polymer blocks being non-identical with respect to the alpha-olefins forming said blocks.
Claim 2
Dependent Claim
57 words
A block copolymer comprising first and second adjacent polymer blocks, each of which is formed from one alpha-olefin having the formula: CH.sub.2 = CHR wherein R is selected from the group consisting of hydrogen and linear alkyl radicals containing 1 to 6 carbon atoms, said polymer blocks being non-identical with respect to the alpha-olefins forming said blocks.
Claim 3
Dependent Claim
29 words
A block copolymer according to claim 1 comprising a first polymer block of a homopolymer of ethylene and adjacent thereto a second polymer block of a homopolymer of propylene.
Claim 4
Dependent Claim
59 words
A block copolymer comprising first and second adjacent polymer blocks, each of which is formed from at least two alpha-olefins having the formula: CH.sub.2 = CHR wherein R is selected from the group consisting of hydrogen and linear alkyl radicals containing 1 to 6 carbon atoms, said polymer blocks being non-identical with respect to the alpha-olefins forming said blocks.
Claim 5
Dependent Claim
59 words
A block copolymer comprising first and second adjacent polymer blocks, each of which is formed from at least two alpha-olefins having the formula: CH.sub.2 = CHR wherein R is selected from the group consisting of hydrogen and linear alkyl radicals containing 1 to 6 carbon atoms, said polymer blocks being non-identical with respect to the alpha-olefins forming said blocks.
Claim 6
Dependent Claim
33 words
A block copolymer according to claim 3 comprising a first polymer block of a copolymer of ethylene and propylene and adjacent thereto a second polymer block of a copolymer of ethylene and butene-1.
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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) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |