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Patent US4563504A successfully refreshed from Google Patents.
US4563504A
Expired / Lapsed
US
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Propylene and ethylene/α-olefin copolymer combinations applicable to the manufacture of mono-oriented yarns
Assignee: Norsolor SA
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Filing: 1983-06-30
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Granted: 1986-01-07
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Expires: 2003-06-30
Abstract
Abstract A combination of at least one propylene polymer and at least one ethylene/α-olefin copolymer wherein the combination comprises: (a) 10 to 40 weight percent isotactic polypropylene; and (b) 60 to 90 weight percent ethylene/α-olefin copolymer, wherein said α-olefin has at least 4 carbon atoms, and wherein said copolymer has a density between 0.905 and 0.940 g/cm 3 and a melt index between 0.2 and 3 dg/min. Application to the manufacture of mono-oriented yarns.
Inventors
- 👤 Marius Hert
- 👤 Philippe Dufosse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:52
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/44; D01F6/46; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08L23/10; C08L23/14; C08L2314/00; C08L2314/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
143 words
A mono-oriented yarn having improved tenacity produced from combination of at least one propylene polymer and at least one ethylene/α-olefin copolymer wherein said combination comprises: (a) 10 to less than 40 weight percent isotactic polypropylene; and (b) 60 to 90 weight percent ethylene/α-olefin copolymer, wherein said α-olefin has at least 4 carbon atoms, wherein said copolymer has a density between 0.905 and 0.940 g/cm 3 and a melt index between 0.2 and 3 dg/min, wherein said copolymer comprises crystalline and amorphous fractions, wherein the average content of said α-olefin units in said copolymer is between 1 and 8 mole percent, wherein the distribution of said α-olefin units in said copolymer is heterogeneous, and wherein the content of α-olefin units in said copolymer varies between at least 0.2 and at most 5 times the average content of α-olefin units, depending on the fractions considered.
Claim 2
Dependent Claim
143 words
A mono-oriented yarn having improved tenacity produced from combination of at least one propylene polymer and at least one ethylene/α-olefin copolymer wherein said combination comprises: (a) 10 to less than 40 weight percent isotactic polypropylene; and (b) 60 to 90 weight percent ethylene/α-olefin copolymer, wherein said α-olefin has at least 4 carbon atoms, wherein said copolymer has a density between 0.905 and 0.940 g/cm 3 and a melt index between 0.2 and 3 dg/min, wherein said copolymer comprises crystalline and amorphous fractions, wherein the average content of said α-olefin units in said copolymer is between 1 and 8 mole percent, wherein the distribution of said α-olefin units in said copolymer is heterogeneous, and wherein the content of α-olefin units in said copolymer varies between at least 0.2 and at most 5 times the average content of α-olefin units, depending on the fractions considered.
Claim 3
Dependent Claim
19 words
The combination of claim 1, wherein said isotactic polypropylene has a melt index of between 0.5 and 10 dg/min.
Claim 4
Dependent Claim
35 words
The combination of claim 1, wherein said crystalline fractions of said copolymer have a single melting peak between 116° C. and 130° C. and represent from 20 to 50 weight percent of the total copolymer.
Claim 5
Dependent Claim
17 words
The combination of claim 1, wherein said ethylene/α-olefin copolymer has a molecular weight between 15,000 and 60,000.
Claim 6
Dependent Claim
25 words
The combination of claim 1, wherein said copolymer comprises a single α-olefin, and wherein the polydispersity index of said copolymer is between 3 and 9.
Claim 7
Dependent Claim
22 words
The combination of claim 1, wherein said copolymer comprises two α-olefins having a ratio of respective average contents between 0.25 and 4.
Claim 8
Dependent Claim
16 words
The combination of claim 6, wherein said copolymer has a polydispersity index between 4 and 12.
Claim 9
Dependent Claim
22 words
The combination of claim 1, wherein said isotactic polypropylene is a propylene/ethylene copolymer comprising less than 10 mole percent derived ethylene units.
References Cited (Backward Citations)
FR1316312A
Cited
US3254139A
Cited
US3328486A
Cited
US3426105A
Cited
US3358053A
Cited
US3819769A
Cited
US4205021A
Cited
US4277578A
Cited
US4302557A
Cited
US4336350A
Cited
EP0048227A2
Cited
EP0052557A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |