US4186240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic olefin resin composition and laminated film or sheet thereof
Assignee: Mitsui Chemicals Inc
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Filing: 1978-03-07
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Granted: 1980-01-29
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Expires: 1998-03-07
Abstract
Abstract A thermoplastic olefin resin composition composed of a blend of (i) 5 to 95% by weight, based on the weight of the blend, of a random copolymer consisting essentially of 55 to 85 mole% of propylene and 45 to 15 mole% of 1-butene and having a heat of fusion of 10 to 80 joules/g determined by differential thermal analysis using a differential scanning calorimeter, and (ii) 5 to 95% by weight, based on the weight of the blend, of an isotactic propylene resin containing 0 to 10 mole% of another alpha -olefin and having a melting point of 135 DEG to 165 DEG C. and a melt index, measured at 230 DEG C., of 0.1 to 20; and a laminated olefin resin film or sheet thereof.
Inventors
- 👤 Akira Matsuda
- 👤 Tetsuo Tojo
- 👤 Kazuo Iwata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:55
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B7/00; B32B7/04; B32B7/12; C08L23/14; C08L23/142; B32B2250/00; B32B2250/02; B32B2250/24; B32B2250/242; B32B2270/00; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/518; B32B2323/00; B32B2323/10; C08L23/04; C08L23/12; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T428/31924; Y10T428/31931; Y10T428/31938
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
148 words
A laminated olefin resin film or sheet comprising a substrate of an isotactic propylene resin and formed on at least one surface thereof, a laminated layer of a thermoplastic olefin resin composition, said composition being composed of a blend of (i) 50 to 95% by weight, based on the total weight of the blend, of a random copolymer consisting essentially of 55 to 85 mole % of propylene and 45 to 15 mole % of 1-butene and having a heat of fusion of 10 to 80 joules/g determined by differential thermal analysis using a differential scanning calorimeter, and (ii) 5 to 50% by weight, based on the total weight of the blend, of an isotactic propylene resin containing 0 to 10 mole % of another α-olefin and having a melting point of 135° to 165° C. and a melt index, measured at 230° C., of 0.1 to 20.
Claim 2
Dependent Claim
148 words
A laminated olefin resin film or sheet comprising a substrate of an isotactic propylene resin and formed on at least one surface thereof, a laminated layer of a thermoplastic olefin resin composition, said composition being composed of a blend of (i) 50 to 95% by weight, based on the total weight of the blend, of a random copolymer consisting essentially of 55 to 85 mole % of propylene and 45 to 15 mole % of 1-butene and having a heat of fusion of 10 to 80 joules/g determined by differential thermal analysis using a differential scanning calorimeter, and (ii) 5 to 50% by weight, based on the total weight of the blend, of an isotactic propylene resin containing 0 to 10 mole % of another α-olefin and having a melting point of 135° to 165° C. and a melt index, measured at 230° C., of 0.1 to 20.
Claim 3
Dependent Claim
15 words
The film or sheet of claim 1 wherein the substrate is a biaxially stretched substrate.
Claim 4
Dependent Claim
20 words
The laminated olefin resin composition of claim 1, wherein the random copolymer has a melt index of 0.1 to 40.
Claim 5
Dependent Claim
22 words
The laminated olefin resin composition of claim 1, wherein the random copolymer has a propylene content of 60 to 82 mole %.
Claim 6
Dependent Claim
22 words
The laminated olefin resin composition of claim 1, wherein the random copolymer has a heat of fusion of 20 to 70 joules/g.
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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) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |