US3779840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamination of olefin polymer to various substrates
Assignee: Dow Chemical Co
•
Filing: 1971-08-11
•
Granted: 1973-12-18
•
Expires: 1991-08-11
Abstract
Abstract Olefin polymers, such as polyethylene, are bonded to various substrates, such as metal, glass, plastic, paper, wood, by surface sulfonating the olefin polymer and adhering the surface sulfonated olefin polymer to the substrate with epoxy resin.
Inventors
- 👤 W Walles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:33
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B27/00; B32B17/00; B32B17/06; B32B17/10; B32B27/06; B32B27/10; B32B27/32; B32B7/00; B32B7/04; B32B7/12; C; C08; C08J; C08J7/00; C08J7/12; C08J7/14; D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/20; D21H19/22; B32B2323/00; B32B2323/04; B32B2323/10; C08J2323/00; C08J2323/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
12 words
The process according to claim 1 wherein the olefin polymer is polyethylene.
Claim 2
Dependent Claim
12 words
The process according to claim 1 wherein the olefin polymer is polypropylene.
Claim 3
Dependent Claim
100 words
A process for bonding an olefin polymer to a metal which comprises (1) surface sulfonating the olefin polymer to a degree of about 0.001 to about 50 milligrams of sulfur trioxide equivalents per square centimeter, (2) applying epoxy resin to the locus of the bond, (3) placing the sulfonated olefin polymer in a contiguous relationship with the metal such that the epoxy resin forms an inter layer between the sulfonated surface of the olefin polymer and the metal and (4) curing the epoxy resin for a time and temperature sufficient to develop the maximum bond strength of the epoxy resin.
Claim 4
Dependent Claim
99 words
A process for bonding an olefin polymer to glass which comprises (1) surface sulfonating the olefin polymer to a degree of about 0.001 to about 50 milligrams of sulfur trioxide equivalents per square centimeter, (2) applying epoxy resin to the locus of the bond, (3) placing the sulfonated olefin polymer in a contiguous relationship with the glass such that the epoxy resin forms an inter layer between the sulfonated surface of the olefin polymer and the glass and (4) curing the epoxy resin for a time and temperature sufficient to develop the maximum bond strength of the epoxy resin.
Claim 5
Dependent Claim
99 words
A process for bonding an olefin polymer to paper which comprises (1) surface sulfonating the olefin polymer to a degreee of about 0.001 to about 50 milligrams of sulfur trioxide equivalents per square centimeter, (2) applying epoxy resin to the locus of the bond, (3) placing the sulfonated olefin polymer in a contiguous relationship with the paper such that the epoxy resin forms an inter layer between the sulfonated surface of the olefin polymer and the paper and (4) curing the epoxy resin for a time and temperature sufficient to develop the maximum bond strength of the epoxy resin.
References Cited (Backward Citations)
US3036930A
Cited
US3142582A
Cited
US3192092A
Cited
US3306791A
Cited
US3607350A
Cited
US3629025A
Cited
US3586569A
Cited
US3684554A
Cited
US3625414A
Cited
US3686016A
Cited
US3689303A
Cited
US3725109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |