Patent US5363416A successfully refreshed from Google Patents.
US4950720A
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Modified polypropylene, process for making and article made from the same
Assignee: ExxonMobil Chemical Patents Inc
•
Filing: 1988-04-29
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Granted: 1990-08-21
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Expires: 2008-04-29
Abstract
Abstract A modified polypropylene having a substantially isotactic homopolypropylene and a propylene/olefin random copolymer, the modified polypropylene including up to about 50 chain disruptors per 1000 propylene repeat units. The chain disruptors are racemic polypropylene diads and olefin, the olefin being incorporated into the high end of the molecular weight distribution of the modified polypropylene.
Inventors
- 👤 James C. Randall, Jr.
- 👤 Ferdinand C. Stehling
- 👤 Michael C. Chen
- 👤 Larry W. Colwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:59
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08F; C08F210/00; C08F210/04; C08F210/06; C08F297/00; C08F297/06; C08F297/08; C08L23/16
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
151 words
A modified polypropylene comprising a reactor blend of higher molecular weight propylene/olefin random copolymer and a lower molecular weight substantially isotactic homopolypropylene, wherein said homopolypropylene comprises an isotactic content of at least about 97% meso diad units, said modified polypropylene further comprising: a copolymer:homopolypropylene weight ratio of from about 1:20 to about 20:1; a copolymer:homopolypropylene melt flow ratio of from about 1:1 to about 1:100; an olefin content up to about 5.0 mol%, said olefin being selected from one or more of ethylene and alpha-olefins of the formula (CH 2 )═(CH)--R, wherein R is a hydrocarbon group having at least two carbon atoms; and an average of up to about 50 chain disruptors per 1000 propylene repeat units, said chain disruptors comprising racemic polypropylene diads and said olefin incorporated into a polypropylene chain wherein said olefin is incorporated into the upper end of the molecular weight distribution of said modified polypropylene.
Claim 2
Dependent Claim
151 words
A modified polypropylene comprising a reactor blend of higher molecular weight propylene/olefin random copolymer and a lower molecular weight substantially isotactic homopolypropylene, wherein said homopolypropylene comprises an isotactic content of at least about 97% meso diad units, said modified polypropylene further comprising: a copolymer:homopolypropylene weight ratio of from about 1:20 to about 20:1; a copolymer:homopolypropylene melt flow ratio of from about 1:1 to about 1:100; an olefin content up to about 5.0 mol%, said olefin being selected from one or more of ethylene and alpha-olefins of the formula (CH 2 )═(CH)--R, wherein R is a hydrocarbon group having at least two carbon atoms; and an average of up to about 50 chain disruptors per 1000 propylene repeat units, said chain disruptors comprising racemic polypropylene diads and said olefin incorporated into a polypropylene chain wherein said olefin is incorporated into the upper end of the molecular weight distribution of said modified polypropylene.
Claim 3
Dependent Claim
24 words
The modified polypropylene of claim 1, wherein said modified polypropylene further comprises an olefin content of from about 0.1 mol% to about 5.0 mol%.
Claim 4
Dependent Claim
24 words
The modified polypropylene of claim 2, wherein said modified polypropylene further comprises an olefin content of from about 0.1 mol% to about 3.0 mol%.
Claim 5
Dependent Claim
24 words
The modified polypropylene of claim 3, wherein said modified polypropylene further comprises an olefin content of from about 0.1 mol% to about 1.5 mol%.
Claim 6
Dependent Claim
24 words
The modified polypropylene of claim 1, wherein said olefin is selected from one or more of ethylene and C 4 to C 10 alpha-olefins.
Claim 7
Dependent Claim
20 words
The modified polypropylene of claim 5, wherein said olefin is selected from one or more of ethylene, 1-butene and 1-hexene.
Claim 8
Dependent Claim
11 words
The modified polypropylene of claim 6, wherein said olefin comprises ethylene.
Claim 9
Dependent Claim
23 words
The modified polypropylene of claim 1, wherein said reactor blend further comprises a copolymer:homopolypropylene weight ratio of from about 1:10 to about 10:1.
Claim 10
Dependent Claim
23 words
The modified polypropylene of claim 8, wherein said modified polypropylene further comprises a copolymer:homopolypropylene weight ratio of from about 1:5 to about 5:1.
Claim 11
Dependent Claim
23 words
The modified polypropylene of claim 9, wherein said modified polypropylene further comprises a copolymer:homopolypropylene weight ratio of from about 1:4 to about 4:1.
Claim 12
Dependent Claim
21 words
The modified polypropylene of claim 1, wherein said homopolypropylene comprises an isotactic content of at least about 98% meso diad units.
Claim 13
Dependent Claim
21 words
The modified polypropylene of claim 11, wherein said homopolypropylene comprises an isotactic content of at least about 99% meso diad units.
Claim 14
Dependent Claim
23 words
The modified polypropylene of claim 1, wherein said modified polypropylene further comprises up to about 30 chain disruptors per 1000 propylene repeat units.
Claim 15
Dependent Claim
23 words
The modified polypropylene of claim 13, wherein said modified polypropylene further comprises up to about 20 chain disruptors per 1000 propylene repeat units.
Claim 16
Dependent Claim
23 words
The modified polypropylene of claim 14, wherein said modified polypropylene further comprises up to about 10 chain disruptors per 1000 propylene repeat units.
Claim 17
Dependent Claim
21 words
The modified polypropylene of claim 1, wherein said modified polypropylene further comprises an MWD of between about 3 to about 20.
Claim 18
Dependent Claim
24 words
The modified polypropylene of claim 1, wherein said modified polypropylene comprises a reactor blend of said substantially isotactic homopolypropylene and said propylene/olefin random copolymer.
Claim 19
Dependent Claim
192 words
A process for producing a modified polypropylene, comprising the steps of: randomly copolymerizing propylene and an olefin in a first reactor in the presence of a high activity catalyst, thereby generating an outlet stream comprising a propylene/olefin random copolymer and a living high activity catalyst; and feeding said outlet stream, additional propylene and a chain transfer agent into a second reactor to produce a reactor blend of a substantially isotactic homopolypropylene and said random propylene/olefin copolymer, wherein said homopolypropylene comprises an isotactic content of at least about 97% mesodiad units, said reactor blend comprising: a copolymer:homopolypropylene melt flow ratio of from about 1:1 to about 1:100, an olefin content up to about 5.0 mol%, said olefin being selected from one or more of ethylene and alpha-olefins of the formula (CH 2 )═(CH)--R, wherein R is a hydrocarbon group having at least two carbon atoms, and an average of up to about 50 chain disruptors per 1000 propylene repeat units, said chain disruptors comprising racemic polypropylene diads and said olefin incorporated into a polypropylene chain wherein said olefin is incorporated into the upper end of the molecular weight distribution of said reactor blend.
Claim 20
Dependent Claim
192 words
A process for producing a modified polypropylene, comprising the steps of: randomly copolymerizing propylene and an olefin in a first reactor in the presence of a high activity catalyst, thereby generating an outlet stream comprising a propylene/olefin random copolymer and a living high activity catalyst; and feeding said outlet stream, additional propylene and a chain transfer agent into a second reactor to produce a reactor blend of a substantially isotactic homopolypropylene and said random propylene/olefin copolymer, wherein said homopolypropylene comprises an isotactic content of at least about 97% mesodiad units, said reactor blend comprising: a copolymer:homopolypropylene melt flow ratio of from about 1:1 to about 1:100, an olefin content up to about 5.0 mol%, said olefin being selected from one or more of ethylene and alpha-olefins of the formula (CH 2 )═(CH)--R, wherein R is a hydrocarbon group having at least two carbon atoms, and an average of up to about 50 chain disruptors per 1000 propylene repeat units, said chain disruptors comprising racemic polypropylene diads and said olefin incorporated into a polypropylene chain wherein said olefin is incorporated into the upper end of the molecular weight distribution of said reactor blend.
Claim 21
Dependent Claim
23 words
The process of claim 18, wherein said reactor blend further comprises an olefin content of from about 0.1 mol% to about 5.0 mol%.
Claim 22
Dependent Claim
23 words
The process of claim 19, wherein said reactor blend further comprises an olefin content of from about 0.1 mol% to about 3.0 mol%.
Claim 23
Dependent Claim
23 words
The process of claim 18, wherein said olefin is selected from one or more of ethylene and C 4 to C 10 alpha-olefins.
Claim 24
Dependent Claim
19 words
The process of claim 21, wherein said olefin is selected from one or more of ethylene, 1-butene and 1-hexene.
Claim 25
Dependent Claim
10 words
The process of claim 22, wherein said olefin comprises ethylene.
Claim 26
Dependent Claim
22 words
The process of claim 18, wherein said reactor blend further comprises a copolymer:homopolypropylene weight ratio of from about 1:20 to about 20:1.
Claim 27
Dependent Claim
22 words
The process of claim 24, wherein said reactor blend further comprises a copolymer:homopolypropylene weight ratio of from about 1:10 to about 10:1.
Claim 28
Dependent Claim
22 words
The process of claim 18, wherein said reactor blend further comprises up to about 30 chain disruptors per 1000 propylene repeat units.
Claim 29
Dependent Claim
193 words
A process for producing a modified polypropylene, comprising the steps of: polymerizing propylene in a first reactor in the presence of a high activity catalyst and a chain transfer agent, thereby generating an outlet stream comprising a substantially isotactic homopolypropylene and a living said high activity catalyst; and feeding said outlet stream, additional propylene and an olefin into a second reactor to produce a reactor blend of a propylene/olefin random copolymer with said substantially isotactic polypropylene, wherein said homopolypropylene comprises an isotactic content of at least about 97% mesodiad units, said reactor blend further comprising: a copolymer:homopolypropylene melt flow ratio of from about 1:1 to about 1:100, an olefin content up to about 5.0 mol%, said olefin being selected from one or more of ethylene and alpha-olefins of the formula (CH 2 )═(CH)--R, wherein R is a hydrocarbon group having at least two carbon atoms, and an average of up to about 50 chain disruptors per 1000 propylene repeat units, said chain disruptors comprising racemic polypropylene diads and said olefin incorporated into a polypropylene chain wherein said olefin is incorporated into the upper end of the molecular weight distribution of said reactor blend.
Claim 30
Dependent Claim
193 words
A process for producing a modified polypropylene, comprising the steps of: polymerizing propylene in a first reactor in the presence of a high activity catalyst and a chain transfer agent, thereby generating an outlet stream comprising a substantially isotactic homopolypropylene and a living said high activity catalyst; and feeding said outlet stream, additional propylene and an olefin into a second reactor to produce a reactor blend of a propylene/olefin random copolymer with said substantially isotactic polypropylene, wherein said homopolypropylene comprises an isotactic content of at least about 97% mesodiad units, said reactor blend further comprising: a copolymer:homopolypropylene melt flow ratio of from about 1:1 to about 1:100, an olefin content up to about 5.0 mol%, said olefin being selected from one or more of ethylene and alpha-olefins of the formula (CH 2 )═(CH)--R, wherein R is a hydrocarbon group having at least two carbon atoms, and an average of up to about 50 chain disruptors per 1000 propylene repeat units, said chain disruptors comprising racemic polypropylene diads and said olefin incorporated into a polypropylene chain wherein said olefin is incorporated into the upper end of the molecular weight distribution of said reactor blend.
Claim 31
Dependent Claim
23 words
The process of claim 27, wherein said reactor blend further comprises an olefin content of from about 0.1 mol% to about 5.0 mol%.
Claim 32
Dependent Claim
23 words
The process of claim 28, wherein said reactor blend further comprises an olefin content of from about 0.1 mol% to about 3.0 mol%.
Claim 33
Dependent Claim
23 words
The process of claim 27, wherein said olefin is selected from one or more of ethylene and C 4 to C 10 alpha-olefins.
Claim 34
Dependent Claim
19 words
The process of claim 30, wherein said olefin is selected from one or more of ethylene, 1-butene and 1-hexene.
Claim 35
Dependent Claim
10 words
The process of claim 31, wherein said olefin comprises ethylene.
Claim 36
Dependent Claim
22 words
The process of claim 27, wherein said reactor blend further comprises a copolymer:homopolypropylene weight ratio of from about 1:20 to about 20:1.
Claim 37
Dependent Claim
22 words
The process of claim 33, wherein said reactor blend further comprises a copolymer:homopolypropylene weight ratio of from about 1:10 to about 10:1.
Claim 38
Dependent Claim
22 words
The process of claim 27, wherein said reactor blend further comprises up to about 30 chain disruptors per 1000 propylene repeat units.
Claim 39
Dependent Claim
142 words
A film produced from a modified polypropylene, wherein said modified polypropylene comprises a reactor blend of a propylene/olefin random copolymer with a substantially isotactic homopolypropylene, wherein said homopolypropylene comprises an isotactic content of at least about 97% mesodiad units, said reactor blend further comprising: a copolymer:homopolypropylene melt flow ratio of from about 1:1 to about 1:100; an olefin content up to about 5.0 mol%, said olefin being selected from one or more of ethylene and alpha-olefins of the formula (CH 2 )═(CH)--R, wherein R is a hydrocarbon group having at least two carbon atoms; and an average of up to about 50 chain disruptors per 1000 propylene repeat units, said chain disruptors comprising racemic polypropylene diads and said olefin incorporated into a polypropylene chain wherein said olefin is incorporated into the upper end of the molecular weight distribution of said reactor blend.
Claim 40
Dependent Claim
142 words
A film produced from a modified polypropylene, wherein said modified polypropylene comprises a reactor blend of a propylene/olefin random copolymer with a substantially isotactic homopolypropylene, wherein said homopolypropylene comprises an isotactic content of at least about 97% mesodiad units, said reactor blend further comprising: a copolymer:homopolypropylene melt flow ratio of from about 1:1 to about 1:100; an olefin content up to about 5.0 mol%, said olefin being selected from one or more of ethylene and alpha-olefins of the formula (CH 2 )═(CH)--R, wherein R is a hydrocarbon group having at least two carbon atoms; and an average of up to about 50 chain disruptors per 1000 propylene repeat units, said chain disruptors comprising racemic polypropylene diads and said olefin incorporated into a polypropylene chain wherein said olefin is incorporated into the upper end of the molecular weight distribution of said reactor blend.
Claim 41
Dependent Claim
23 words
The film of claim 36, wherein said reactor blend further comprises an olefin content of from about 0.1 mol% to about 5.0 mol%.
Claim 42
Dependent Claim
23 words
The film of claim 37, wherein said reactor blend further comprises an olefin content of from about 0.1 mol% to about 3.0 mol%.
Claim 43
Dependent Claim
23 words
The film of claim 36, wherein said olefin is selected from one or more of ethylene and C 4 to C 10 alpha-olefins.
Claim 44
Dependent Claim
19 words
The film of claim 39, wherein said olefin is selected from one or more of ethylene, 1-butene and 1-hexene.
Claim 45
Dependent Claim
10 words
The film of claim 40, wherein said olefin comprises ethylene.
Claim 46
Dependent Claim
22 words
The film of claim 36, wherein said reactor blend further comprises a copolymer:homopolypropylene weight ratio of from about 1:20 to about 20:1.
Claim 47
Dependent Claim
22 words
The film of claim 42, wherein said reactor blend further comprises a copolymer:homopolypropylene weight ratio of from about 1:10 to about 10:1.
Claim 48
Dependent Claim
22 words
The film of claim 36, wherein said reactor blend further comprises up to about 30 chain disruptors per 1000 propylene repeat units.
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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) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |