US3970719A
Expired / Lapsed
US
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Preparation of block copolymers
Assignee: Phillips Petroleum Co
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Filing: 1958-01-16
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Granted: 1976-07-20
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Expires: 1978-01-16
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
2026-11-05 21:46
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06; C08F297/08; C08F10/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
27 words
A block copolymer comprising a first polymer block of a homopolymer of propylene and ajacent thereto a second polymer block of a copolymer of ethylene and propylene.
Claim 2
Dependent Claim
27 words
A block copolymer comprising a first polymer block of a homopolymer of propylene and ajacent thereto a second polymer block of a copolymer of ethylene and propylene.
Claim 3
Dependent Claim
40 words
A process of preparing block copolymers from ethylene and propylene monomers which comprises alternately polymerizing one of said monomers and a mixture of said monomers in the presence of a catalyst comprising a titanium halide and an aluminum alkyl compound.
Claim 4
Dependent Claim
40 words
A process of preparing block copolymers from ethylene and propylene monomers which comprises alternately polymerizing one of said monomers and a mixture of said monomers in the presence of a catalyst comprising a titanium halide and an aluminum alkyl compound.
Claim 5
Dependent Claim
12 words
The process of claim 2 wherein said titanium halide is titanium trichloride.
Claim 6
Dependent Claim
84 words
A process for the preparation of solid, substantially crystalline block copolymers which comprises alternately contacting, under polymerizing conditions, at least two different alpha-olefins having the formula: CH 2 = CHR wherein R is selected from the group consisting of hydrogen and linear alkyl radicals containing 1 to 6 carbon atoms, with a catalytic system comprising a titanium halide and an aluminum alkyl in an inert, liquid reaction medium, each of the contactings with an alpha-olefin being performed in the substantial absence of another alpha-olefin.
Claim 7
Dependent Claim
84 words
A process for the preparation of solid, substantially crystalline block copolymers which comprises alternately contacting, under polymerizing conditions, at least two different alpha-olefins having the formula: CH 2 = CHR wherein R is selected from the group consisting of hydrogen and linear alkyl radicals containing 1 to 6 carbon atoms, with a catalytic system comprising a titanium halide and an aluminum alkyl in an inert, liquid reaction medium, each of the contactings with an alpha-olefin being performed in the substantial absence of another alpha-olefin.
Claim 8
Dependent Claim
12 words
The process of claim 4 wherein said titanium halide is titanium trichloride.
Claim 9
Dependent Claim
14 words
The process of claim 5 wherein said two different alpha-olefins are ethylene and propylene.
Claim 10
Dependent Claim
68 words
A process of preparing block copolymers from at least two different alpha-olefins having the formula: CH 2 = CHR wherein R is selected from the group consisting of hydrogen and linear alkyl radicals containing 1 to 6 carbon atoms which comprises alternately polymerizing one of said alpha-olefins and a mixture of said alpha-olefins in the presence of a catalyst comprising a titanium halide and an aluminum alkyl compound.
Claim 11
Dependent Claim
68 words
A process of preparing block copolymers from at least two different alpha-olefins having the formula: CH 2 = CHR wherein R is selected from the group consisting of hydrogen and linear alkyl radicals containing 1 to 6 carbon atoms which comprises alternately polymerizing one of said alpha-olefins and a mixture of said alpha-olefins in the presence of a catalyst comprising a titanium halide and an aluminum alkyl compound.
Claim 12
Dependent Claim
86 words
A process of preparing block copolymers from at least three different alpha-olefins having the formula: CH 2 = CHR wherein R is selected from the group consisting of hydrogen and linear alkyl radicals containing 1 to 6 carbon atoms which comprises alternately polymerizing first and second mixtures of two of said alpha-olefins, at least one of the alpha-olefins of said first mixture being different from the alpha-olefins of said second mixture, in the presence of a catalyst comprising a titanium halide and an aluminum alkyl compound.
Claim 13
Dependent Claim
86 words
A process of preparing block copolymers from at least three different alpha-olefins having the formula: CH 2 = CHR wherein R is selected from the group consisting of hydrogen and linear alkyl radicals containing 1 to 6 carbon atoms which comprises alternately polymerizing first and second mixtures of two of said alpha-olefins, at least one of the alpha-olefins of said first mixture being different from the alpha-olefins of said second mixture, in the presence of a catalyst comprising a titanium halide and an aluminum alkyl compound.
References Cited (Backward Citations)
US3300459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |