US4724186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weatherable three layer films
Assignee: Dow Chemical Co
•
Filing: 1987-02-09
•
Granted: 1988-02-09
•
Expires: 2007-02-09
Abstract
Abstract A flexible weather resistant film particularly adapted for use as a weatherable surface coating by lamination to a substrate comprising a weather resistant layer of a blend of a vinyl chloride polymer, an interpolymer of ethylene and at least one carboxylic acid or ester thereof containing ethylenic unsaturation, and chlorinated polyethylene, an adhesive layer for adhesion of the film to a substrate comprising an interpolymer of ethylene and acrylic or methacrylic acid and interposed between the weatherable layer and the adhesive layer, an interlayer comprising a copolymer of ethylene and vinyl acetate.
Inventors
- 👤 Robert H. Kelch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:13
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B32B15/00; B32B15/04; B32B15/08; B32B15/18; B32B27/06; B32B27/08; B32B27/18; B32B27/20; B32B27/28; B32B27/30; C; C09; C09J; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/35; C08; C08L; C08L2205/00; C08L2205/03; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853; C08L23/26; C08L23/28; C08L91/00; C08L91/06; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2804; Y10T428/2843; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
93 words
A coextruded three ayer flexible film particularly adapted for use as a weatherable surface coating by lamination to a substrate having a weatherable layer comprising a blend of a vinyl chloride polymer, an interpolymer comprising ethylene and at least one carboxylic acid or ester thereof containing ethylenic unsaturation and a chlorinated polyolefin, an adhesive layer for adhesion of the film to a substrate comprising an interpolymer of ethylene and acrylic or methacrylic acid and interposed between the weatherable layer and the adhesive layer an interlayer comprising a copolymer of ethylene and vinyl acetate.
Claim 2
Dependent Claim
93 words
A coextruded three ayer flexible film particularly adapted for use as a weatherable surface coating by lamination to a substrate having a weatherable layer comprising a blend of a vinyl chloride polymer, an interpolymer comprising ethylene and at least one carboxylic acid or ester thereof containing ethylenic unsaturation and a chlorinated polyolefin, an adhesive layer for adhesion of the film to a substrate comprising an interpolymer of ethylene and acrylic or methacrylic acid and interposed between the weatherable layer and the adhesive layer an interlayer comprising a copolymer of ethylene and vinyl acetate.
Claim 3
Dependent Claim
52 words
A film according to claim 1, wherein the vinyl chloride polymer is selected from the group consisting of polyvinyl chloride and polymers of vinyl chloride and at least one comonomer having up to about 10 carbons selected from the group consisting of olefins, vinyl esters and alkyl esters of unsaturated carboxylic acids.
Claim 4
Dependent Claim
22 words
A film according to claim 2, wherein the vinyl chloride polymer has an inherent viscosity of from about 0.6 to about 1.0.
Claim 5
Dependent Claim
13 words
A film according to claim 1, wherein the chlorinated polyolefin is chlorinated polyethylene.
Claim 6
Dependent Claim
22 words
A film according to claim 4, wherein the chlorinated polyethylene resin has a viscosity of from about 6,000 to about 30,000 poise.
Claim 7
Dependent Claim
28 words
A film according to claim 1, wherein the interpolymer of ethylene and at least one carboxylic acid or ester thereof containing ethylenic unsaturation is an ethylene/vinyl acetate copolymer.
Claim 8
Dependent Claim
17 words
A laminated structure comprising a substrate having adhered thereto a coextruded flexible film according to claim 1.
Claim 9
Dependent Claim
13 words
A laminated structure according to claim 7, wherein the substrate comprises galvanized steel.
References Cited (Backward Citations)
US3006889A
Cited
US3165560A
Cited
US3291863A
Cited
US3299182A
Cited
US3705067A
Cited
US3845166A
Cited
US3819554A
Cited
US4029850A
Cited
US3940456A
Cited
US3994995A
Cited
US3904579A
Cited
US4113805A
Cited
US4605592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-08 | 1991-08-10 | 1992-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-08 | 1995-08-10 | 1996-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-08 | 1999-08-10 | 2000-02-09 | $7700.00 | Window Closed / Lapsed |