US4778724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for enhancing bonding to polyolefin surfaces
Assignee: Worthen Industries Inc
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Filing: 1987-01-23
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Granted: 1988-10-18
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Expires: 2007-01-23
Abstract
Abstract A polyolefin primer is coated on and bonded to a polyolefin surface. The primer is irradiated and an adhesive is bonded to the primer. The irradiated surface significantly enhances the final bonding between the polyolefin and the adhesive.
Inventors
- 👤 Robert A. Bragole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:20
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; C08J7/00; C08J7/04; C08J7/042; C08J7/043; C08J2323/00; C08J2323/02; C08J2423/00; C08J2423/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31551; Y10T428/31573; Y10T428/31587
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
74 words
A method for the bonding of an adhesive to a polyolefin surface which includes: coating the surface with a halogenated polyolefin primer, the primer being bonded to said surface; irradiating the primer a plurality of times to maximize the formation of free radical species to increase the adhesion of the primer to an adhesive; and applying an adhesive to the primer to effect a chemical bonding between the free radical species and the adhesive.
Claim 2
Independent Claim
74 words
A method for the bonding of an adhesive to a polyolefin surface which includes: coating the surface with a halogenated polyolefin primer, the primer being bonded to said surface; irradiating the primer a plurality of times to maximize the formation of free radical species to increase the adhesion of the primer to an adhesive; and applying an adhesive to the primer to effect a chemical bonding between the free radical species and the adhesive.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein the polyolefin is selected from the group consisting of polyethylene, polypropylene, polybutylene, polyisoprenes and their copolymers and combinations thereof.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein the polyolefin primer consists of halogenated polyethylene, polybutylene, polypropylene, polyisoprenes and their copolymers and combinations thereof.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein the primer is a chlorinated polypropylene and where the polyolefin is polypropylene.
Claim 6
Dependent Claim
22 words
The method of claim 1 wherein the irradiating of the primer includes: subjecting the primer to light energy in the ultraviolet range.
Claim 7
Dependent Claim
24 words
The method of claim 5 wherein the adhesive is selected from the group consisting essentially of polyurethane, epoxy and acrylic adhesives or combinations thereof.
Claim 8
Dependent Claim
14 words
The method of claim 1 wherein the free radical species comprise peroxides and hydroperoxides.
Claim 9
Dependent Claim
66 words
A polyolefin laminate which comprises a substrate of polyolefin, a halogenated polyolefin primer bonded to the polyolefin substrate, the primer characterized by free radical species which are formed by a plurality of successive doses of radiation which maximized the formation of the species, which species are adapted to chemically react with an adhesive applied thereto to form an adhesive bond between the adhesive and the primer.
Claim 10
Dependent Claim
66 words
A polyolefin laminate which comprises a substrate of polyolefin, a halogenated polyolefin primer bonded to the polyolefin substrate, the primer characterized by free radical species which are formed by a plurality of successive doses of radiation which maximized the formation of the species, which species are adapted to chemically react with an adhesive applied thereto to form an adhesive bond between the adhesive and the primer.
Claim 11
Dependent Claim
25 words
The laminate of claim 8 wherein the polyolefins is selected from the group consisting of polyethylene, polypropylene, polybutylene, polyisoprenes and their copolymers and combinations thereof.
Claim 12
Dependent Claim
22 words
The laminate of claim 8 wherein the polyolefin primer consists of halogenated polyethylene, polybutylene, polypropylene, polyisoprenes and their copolymers and combinations thereof.
Claim 13
Dependent Claim
18 words
The laminate of claim 8 wherein the primer is a chlorinated polypropylene and where the polyolefin is polypropylene.
Claim 14
Dependent Claim
15 words
The laminate of claim 8 wherein the free radical species comprise peroxides and hydrogen peroxides.
Claim 15
Dependent Claim
24 words
The laminate of claim 8 wherein the adhesive is selected from the group consisting essentially of polyurethane, epoxy and acrylic adhesives or combinations thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |