US4064315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Maleic anhydride-modified polymer lager coated with polymeric composition derived from vinylidene chloride
Assignee: Mobil Oil AS
•
Filing: 1976-08-09
•
Granted: 1977-12-20
•
Expires: 1996-08-09
Abstract
Abstract Polypropylene resins compounded with a maleated polyolefin (e.g., polyethylene or polypropylene) provide film compositions having improved adhesion to polyvinylidene chloride coatings and resistance to the deleterious effect of moisture upon adhesion thereby avoiding need of a primer coat. Specific embodiments include biaxially oriented polypropylene film made from polypropylene compounded with such a maleated polyolefin and directly coated with a polyvinylidene chloride coating.
Inventors
- 👤 David A. Bivans
- 👤 Gary L. Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:33
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02; C08F255/08; C08F255/10; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/052; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/10; C08L23/12; C08L51/00; C08L51/06; C09; C09J; C09J151/00; C09J151/06; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12; C08J2427/00; C08L2666/00; C08L2666/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
A composite consisting of a coated polypropylene film wherein the coating consists of a multipolymer formed from about 80% to about 90% by weight of vinylidene chloride and from about 20% to about 10% by weight of at least one other comonomer; said polypropylene film consisting of a layer formed from a blended mixture of from about 90% to about 99% by weight of isotactic polypropylene and from about 10% to about 1% by weight of a maleic anhydride-modified ethylene, propylene or butene polymer.
Claim 2
Dependent Claim
84 words
A composite consisting of a coated polypropylene film wherein the coating consists of a multipolymer formed from about 80% to about 90% by weight of vinylidene chloride and from about 20% to about 10% by weight of at least one other comonomer; said polypropylene film consisting of a layer formed from a blended mixture of from about 90% to about 99% by weight of isotactic polypropylene and from about 10% to about 1% by weight of a maleic anhydride-modified ethylene, propylene or butene polymer.
Claim 3
Dependent Claim
43 words
A coated polypropylene film in accordance with claim 1 wherein the amount of maleic anhydride-modified ethylene, propylene or butene polymer is from about 2% up to about 5% by weight based upon the weight of the polypropylene resin employed in said polypropylene film.
Claim 4
Dependent Claim
43 words
A coated polypropylene film as defined in claim 1 wherein said comonomer of said coating is selected from the group consisting of vinyl chloride, acrylonitrile methyl acrylate, ethyl acrylate, methyl methacrylate, butylacrylate, 2 ethyl-hexyl acrylate, acrylic acid, methacrylic acid, and Na-2-(methacroyloxy) ethane sulfonate.
References Cited (Backward Citations)
US3497574A
Cited
US3284380A
Cited
US3483276A
Cited
US3475369A
Cited
US3595943A
Cited
US3714106A
Cited
US3671356A
Cited
US3695923A
Cited
US3658948A
Cited
US3707393A
Cited
US3856889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |