US4461872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of a propylene/α-olefin copolymer with isotactic prolypropylene
Assignee: EIDP Inc
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Filing: 1983-02-22
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Granted: 1984-07-24
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Expires: 2003-02-22
Abstract
Abstract Blends of an isotactic propylene polymer with a copolymer of propylene with a C6-C12 alpha -olefin, wherein the mole proportion of the alpha -olefin in the copolymer is 10-55%; the crystallinity number of the copolymer is 10 to 37; and the sum of the mole proportion of alpha -olefin in the copolymer and the copolymer's crystallinity number is 20-65 are useful in a variety of applications requiring a broad range of properties from soft elastomers to rigid plastics, including spunbonded fiber materials, film, and adhesives.
Inventors
- 👤 Aaron C. L. Su
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:14
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/14; C08L2205/00; C08L2205/02; C08L23/12; C08L23/142
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
84 words
A composition consisting essentially of a blend of an elastomeric copolymer of 45-90 mole percent of propylene and 10-55 mole percent of a C 6 -C 12 α-olefin with isotactic polypropylene, the weight ratio of copolymer to isotactic propylene polymer being comprised within the range of about 5:95 to 95:5, wherein following relationships exist: x+y=a, where x=mole % of α-olefin in the copolymer, and x=10 to 55; y=crystallinity number of the copolymer determined by infrared spectroscopy, and y=10 to 37; and a=20 to 65.
Claim 2
Dependent Claim
84 words
A composition consisting essentially of a blend of an elastomeric copolymer of 45-90 mole percent of propylene and 10-55 mole percent of a C 6 -C 12 α-olefin with isotactic polypropylene, the weight ratio of copolymer to isotactic propylene polymer being comprised within the range of about 5:95 to 95:5, wherein following relationships exist: x+y=a, where x=mole % of α-olefin in the copolymer, and x=10 to 55; y=crystallinity number of the copolymer determined by infrared spectroscopy, and y=10 to 37; and a=20 to 65.
Claim 3
Dependent Claim
16 words
A composition of claim 1 wherein x=10 to 40; y=15 to 35; and a=45 to 57.5.
Claim 4
Dependent Claim
19 words
A composition of claim 1 wherein the amount of the copolymer in the blend is about 5-15 weight percent.
Claim 5
Dependent Claim
19 words
A composition of claim 1 wherein the amount of the copolymer in the blend is about 60-80 weight percent.
Claim 6
Dependent Claim
12 words
A composition of claim 1 wherein the α-olefin is hexene-1 or decene-1.
Claim 7
Dependent Claim
12 words
A composition of claim 1 wherein the isotactic propylene polymer is homopolypropylene.
Claim 8
Dependent Claim
35 words
A composition of claim 1 wherein the isotactic propylene polymer is a copolymer of propylene with a minor amount of another ethylenically unsaturated monomer, such copolymer having a sharp melting point above about 150° C.
Claim 9
Dependent Claim
12 words
A composition of claim 7 wherein the unsaturated comonomer is an α-olefin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |