US4258106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of obtaining interface adhesion and articles produced thereby
Assignee: Owens Corning Fiberglas Technology Inc
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Filing: 1979-03-09
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Granted: 1981-03-24
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Expires: 1999-03-09
Abstract
Abstract The present invention relates to the method of producing an interface that intimately bonds to common molding compounds; even though they contain mold release agents. The method utilizes a material at the surface of the molded part that bonds to the surface of the part but not to the steel mold. This not only permits the molding of an article using common industry techniques but more importantly the subsequent postmolding of a pigmented or protective resinous coating on one surface of a molded article. The method eliminates the need for special surface preparation such as sand blasting, scuff sanding, etc., to facilitate bonding of a secondary coating.
Inventors
- 👤 Walter D. Cottrell, Jr.
- 👤 Ralph B. Jutte, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:27
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/20; B32B27/36; B32B2250/00; B32B2250/40; B32B2305/00; B32B2305/72; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31794; Y10T428/31797
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
62 words
A composite comprising: first and second layers of thermoset materials crosslinked by in situ reacted monomer, with at least said first layer containing a mold release agent, and a sheet of thermoplastic material containing in situ polymerized monomer and mold release agent absorbed from said layers of thermoset materials sandwiched between and bonded to said first and second layers of thermoset material.
Claim 2
Dependent Claim
62 words
A composite comprising: first and second layers of thermoset materials crosslinked by in situ reacted monomer, with at least said first layer containing a mold release agent, and a sheet of thermoplastic material containing in situ polymerized monomer and mold release agent absorbed from said layers of thermoset materials sandwiched between and bonded to said first and second layers of thermoset material.
Claim 3
Dependent Claim
24 words
The composite of claim 1 wherein said thermoplastic material is a polystyrene, substituted polystyrene, polyacrylate, substituted polyacrylate, polyvinylacetate or a substituted polyvinylacetate base material.
Claim 4
Dependent Claim
13 words
The composite of claim 2 wherein said thermoset materials are polyester base materials.
Claim 5
Dependent Claim
17 words
The composite of claim 3 wherein said mold release agent is a salt of a fatty acid.
Claim 6
Dependent Claim
27 words
The composite of claim 4 wherein said first layer of thermoset material is glass fiber reinforced, and wherein said second layer is a highly pigmented surfacing layer.
Claim 7
Dependent Claim
13 words
The composite of claim 5 wherein said second layer is a gel coat.
Claim 8
Dependent Claim
89 words
A composite comprising: a sheet of a thermoplastic polymer that is softenable and permeable by styrene, a first layer of a highly filled and pigmented polyester resin on one surface of said sheet, and a second layer of polyester resin containing glass fiber reinforcement on the other surface of said sheet, said layers being crosslinked and bonded to said sheet by the in situ polymerization of styrene, at least one of said layers containing a mold release agent and said sheet containing mold release agent absorbed from said layers.
Claim 9
Dependent Claim
89 words
A composite comprising: a sheet of a thermoplastic polymer that is softenable and permeable by styrene, a first layer of a highly filled and pigmented polyester resin on one surface of said sheet, and a second layer of polyester resin containing glass fiber reinforcement on the other surface of said sheet, said layers being crosslinked and bonded to said sheet by the in situ polymerization of styrene, at least one of said layers containing a mold release agent and said sheet containing mold release agent absorbed from said layers.
Claim 10
Dependent Claim
92 words
A colored article comprising: a sheet of thermoplastic material that is softenable and permeable by styrene, a first layer of crosslinked polyester that is reinforced by glass fibers on one surface of the sheet, and a second layer of a highly filled, pigmented and crosslinked polyester on the other surface of said sheet, said polyester layers being bonded to said thermoplastic sheet by polystyrene chains which permeate said thermoplastic sheet, at least one of said layers containing a mold release agent and said sheet containing mold release agent absorbed from said layers.
Claim 11
Dependent Claim
92 words
A colored article comprising: a sheet of thermoplastic material that is softenable and permeable by styrene, a first layer of crosslinked polyester that is reinforced by glass fibers on one surface of the sheet, and a second layer of a highly filled, pigmented and crosslinked polyester on the other surface of said sheet, said polyester layers being bonded to said thermoplastic sheet by polystyrene chains which permeate said thermoplastic sheet, at least one of said layers containing a mold release agent and said sheet containing mold release agent absorbed from said layers.
Claim 12
Dependent Claim
16 words
The colored article of claim 8 wherein said filled and pigmented layer is a gel coat.
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) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |