Patent US4546150A successfully refreshed from Google Patents.
US4546150A
Expired / Lapsed
US
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Film of polymer mixture containing 4-methyl-1-petene polymer
Assignee: Mitsui Chemicals Inc
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Filing: 1984-07-24
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Granted: 1985-10-08
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Expires: 2004-07-24
Abstract
Abstract A film composed substantially of a polymer mixture containing a 4-methyl-1-pentene polymer, said polymer mixture comprising (A) the 4-methyl-1-pentene polymer and (B) a copolymer of propylene and an alpha-olefin, the propylene/alpha-olefin copolymer (B) containing 40 to 87 mole % of the propylene component and a heat of crystal fusion of not more than 80 joules/g, and the content of the propylene/alpha-olefin copolymer (B) being 5 to 70% by weight based on the total weight of the 4-methyl-1-pentene polymer (A) and the propylene/alpha-olefin copolymer (B).
Inventors
- 👤 Hiromi Shigemoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:37
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/10; C08L23/14; C08L23/16; C08L2203/00; C08L2203/16
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
84 words
A film composed substantially of a polymer mixture containing a 4-methyl-1-pentene polymer, said polymer mixture comprising (A) the 4-methyl-1-pentene polymer and (B) a copolymer of propylene and an alpha-olefin, the propylene/alpha-olefin copolymer (B) containing 40 to 87 mole % of the propylene component and a heat of crystal fusion of not more than 80 joules/g, and the content of the propylene/alpha-olefin copolymer (B) being 5 to 70% by weight based on the total weight of the 4-methyl-1-pentene polymer (A) and the propylene/alpha-olefin copolymer (B).
Claim 2
Dependent Claim
84 words
A film composed substantially of a polymer mixture containing a 4-methyl-1-pentene polymer, said polymer mixture comprising (A) the 4-methyl-1-pentene polymer and (B) a copolymer of propylene and an alpha-olefin, the propylene/alpha-olefin copolymer (B) containing 40 to 87 mole % of the propylene component and a heat of crystal fusion of not more than 80 joules/g, and the content of the propylene/alpha-olefin copolymer (B) being 5 to 70% by weight based on the total weight of the 4-methyl-1-pentene polymer (A) and the propylene/alpha-olefin copolymer (B).
Claim 3
Dependent Claim
15 words
The film of claim 1 wherein the 4-methyl-1-pentene polymer is a crystalline homopolymer of 4-methyl-1-pentene.
Claim 4
Dependent Claim
37 words
The film of claim 1 wherein the 4-methyl-1-pentene polymer is a crystalline copolymer of at least 85 mole % of 4-methyl-1-pentene and not more than 15 mole % of an alpha-olefin having 2 to 20 carbon atoms.
Claim 5
Dependent Claim
20 words
The film of claim 1 wherein the 4-methyl-1-pentene polymer has a melt flow rate of 0.5 to 200 g/10 minutes.
Claim 6
Dependent Claim
17 words
The film of claim 1 wherein the propylene/alpha-olefin copolymer contains 60 to 85 mole % of propylene.
Claim 7
Dependent Claim
21 words
The film of claim 1 wherein the propylene/alpha-olefin copolymer has a heat of crystal fusion of from 1 to 70 joules/g.
Claim 8
Dependent Claim
20 words
The film of claim 1 wherein the propylene/alpha-olefin copolymer has a melt flow rate of 0.5 to 200 g/10 minutes.
Claim 9
Dependent Claim
16 words
The film of claim 1 wherein the propylene/alpha-olefin copolymer has a microisotacticity of at least 0.7.
Claim 10
Dependent Claim
21 words
The film of claim 1 wherein the propylene/alpha-olefin copolymer has a boiling n-heptane-insoluble content of not more than 5% by weight.
Claim 11
Dependent Claim
31 words
The film of claim 1 wherein the content of the propylene/alpha-olefin copolymer is 10 to 40% by weight based on the total weight of the propylene/alpha-olefin copolymer and the 4-methyl-1-pentene polymer.
Claim 12
Dependent Claim
19 words
The film of claim 1 wherein the polymer mixture consists substantially of the 4-methyl-1-pentene polymer and the propylene/alpha-olefin copolymer.
Claim 13
Dependent Claim
8 words
The film of claim 1 which is non-stretched.
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) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |