US4563504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 02:15
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)
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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) | 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 |