US4121006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated polyolefin film
Assignee: Daicel Corp
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Filing: 1976-08-18
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Granted: 1978-10-17
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Expires: 1996-08-18
Abstract
Abstract A polyolefin film is coated with an undercoat consisting essentially of a mixture of (a) polyvinylidene chloride or a copolymer thereof containing at least 88 percent by weight of vinylidene chloride monomer units and (b) a chlorinated polypropylene or a graft polymer thereof; at the weight ratio of a/b in the range between 99/1 and 90/10, and a topcoat consisting essentially of a vinylidene chloride copolymer containing not more than 88 percent by weight of vinylidene chloride monomer units.
Inventors
- 👤 Yuichi Harada
- 👤 Tetsuo Ishihara
- 👤 Shigeyuki Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:46
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/043; C08J7/048; C08J7/052; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12; C08J2427/00; C08J2427/02; C08J2427/04; C08J2427/08; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24612; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
154 words
A polyolefin film coated with I. an undercoat consisting essentially of a mixture of (a) polyvinylidene chloride or vinylidene chloride copolymer containing at least 88 weight percent of vinylidene chloride monomer units, and (b) a chlorinated polypropylene having a chlorine content of from 15 to 55 percent by weight and an intrinsic viscosity of from 0.3 to 3.0 dl/g, wherein intrinsic viscosity is determined by measuring the viscosity of a solution of 0.2 to 0.5 percent by weight of said chlorinated polypropylene in decalin at 135° C., or a graft polymer of said chlorinated polypropylene having grafted thereto from 2 to 30 percent by weight, based on the weight of the graft polymer, of an ethylenically unsaturated vinyl monomer, wherein the weight ratio of a/b is from 99/1 to 90/10, and Ii. a top coat consisting essentially of a vinylidene chloride copolymer containing from 35 to 88 weight percent of vinylidene chloride monomer units.
Claim 2
Dependent Claim
154 words
A polyolefin film coated with I. an undercoat consisting essentially of a mixture of (a) polyvinylidene chloride or vinylidene chloride copolymer containing at least 88 weight percent of vinylidene chloride monomer units, and (b) a chlorinated polypropylene having a chlorine content of from 15 to 55 percent by weight and an intrinsic viscosity of from 0.3 to 3.0 dl/g, wherein intrinsic viscosity is determined by measuring the viscosity of a solution of 0.2 to 0.5 percent by weight of said chlorinated polypropylene in decalin at 135° C., or a graft polymer of said chlorinated polypropylene having grafted thereto from 2 to 30 percent by weight, based on the weight of the graft polymer, of an ethylenically unsaturated vinyl monomer, wherein the weight ratio of a/b is from 99/1 to 90/10, and Ii. a top coat consisting essentially of a vinylidene chloride copolymer containing from 35 to 88 weight percent of vinylidene chloride monomer units.
Claim 3
Dependent Claim
22 words
A coated film as claimed in claim 1, wherein the substrate film is selected from the group consisting of polypropylene and poly-4-methylpentene-1.
Claim 4
Dependent Claim
22 words
A coated film as claimed in claim 1 wherein the intrinsic viscosity of said chlorinated polypropylene is from 0.5 to 1.5 dl/g.
Claim 5
Dependent Claim
18 words
A coated film as claimed in claim 1 wherein the substrate film is a biaxially stretched polypropylene film.
Claim 6
Dependent Claim
24 words
A coated film as claimed in claim 1 wherein the combined thickness of the undercoat and the topcoat is from 1 to 10 microns.
Claim 7
Dependent Claim
19 words
A coated film as claimed in claim 1 wherein the weight ratio of a/b is from 99/1 to 95/5.
Claim 8
Dependent Claim
31 words
A coated film as claimed in claim 6 wherein said top coat consists essentially of a vinylidene chloride copolymer containing from 50 to 85 weight percent of vinylidene chloride monomer units.
Claim 9
Dependent Claim
33 words
A coated film as claimed in claim 7 wherein the vinylidene chloride copolymer in component (a) consists essentially of vinylidene chloride copolymer containing at least 90 weight percent of vinylidene chloride monomer units.
Claim 10
Dependent Claim
48 words
A coated film as claimed in claim 6 wherein said top coat consists essentially of a vinylidene chloride copolymer containing about 85 weight percent of vinylidene chloride monomer units and the vinylidene chloride copolymer in component (a) contains at least 90 weight percent of vinylidene chloride monomer 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) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |