US4659412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for adhering a coating material to densified random-fiber composite sheet
Assignee: Dow Chemical Co
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Filing: 1984-10-22
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Granted: 1987-04-21
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Expires: 2004-10-22
Abstract
Abstract A method for adhering a coating material to at least one surface of a densified random-fiber composite sheet is provided. The method comprises applying sufficient heat to a surface of the composite sheet to form an activated surface whereby the fiber component of the sheet is projected outward from a plane defined by that surface, and contacting the activated surface with the coating material. The coating material is generally of a viscous or liquid nature such that it can physically interact with the projected fibers to adhere thereto. A method for adhering asphalt to a metal substrate employing a densified random-fiber composite sheet is also provided wherein the metal is coated with an adhesive and then adhered to an activated surface of a composite sheet. Asphalt is then coated onto the exposed surface of the composite sheet which has been activated or is activated by coating with hot asphalt.
Inventors
- 👤 Ritchey O. Newman
- 👤 Steven E. Finlayson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:05
CPC Classifications
B; B32; B32B; B32B11/00; B32B11/10; B05; B05D; B05D7/00; B32B11/04; B32B15/00; B32B15/14; B32B15/18; B32B5/00; B32B5/02; B32B7/00; B32B7/04; B32B7/12; C; C08; C08J; C08J5/00; C08J5/12; B05D3/00; B05D3/02; B05D3/0218; B32B2262/00; B32B2262/10; B32B2262/101; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23914
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
117 words
A method for adhering a coating material to at least one surface of a densitifed random-fiber composite sheet, said sheet being prepared from fibrous reinforcement materials, binders and a heat-fusible organic polymer, which comprises applying sufficient heat to said surface to cause the heat-fusible organic polymer to soften and releases at least a portion of the length of fibrous materials present at the surface of said sheet whereby said portion of the fibrous component of said sheet projects outward from a plane defined by said surface, and contacting said surface with a coating material of sufficient viscosity to flow around said projected portion of the fibrous component and physically interact to anchor to the projected fibrous component.
Claim 2
Independent Claim
117 words
A method for adhering a coating material to at least one surface of a densitifed random-fiber composite sheet, said sheet being prepared from fibrous reinforcement materials, binders and a heat-fusible organic polymer, which comprises applying sufficient heat to said surface to cause the heat-fusible organic polymer to soften and releases at least a portion of the length of fibrous materials present at the surface of said sheet whereby said portion of the fibrous component of said sheet projects outward from a plane defined by said surface, and contacting said surface with a coating material of sufficient viscosity to flow around said projected portion of the fibrous component and physically interact to anchor to the projected fibrous component.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein said step of applying sufficient heat is made prior to contacting said coating material.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein said step of applying sufficient heat is made simultaneously with contacting said coating material.
Claim 5
Dependent Claim
39 words
The method of claim 3 wherein said coating material is sufficiently hot to cause the heat-fusible organic polymer to soften and release at least a portion of the length of fibrous materials present at the surface of said sheet.
Claim 6
Dependent Claim
28 words
The method of claim 1 wherein said densified random-fiber composite sheet has reinforcing fiber present from about 10 to about 80 percent by weight of said composite sheet.
Claim 7
Dependent Claim
23 words
The method of claim 5 wherein said reinforcing fibers have an average length of from about 3 to about 25 mm in length.
Claim 8
Dependent Claim
12 words
The method of claim 6 wherein said reinforcing fibers are glass fibers.
Claim 9
Dependent Claim
27 words
The method of claim 1 wherein the coating material is an adhesive and includes the additional step of adhering said densified random-fiber composite sheet to a substrate.
Claim 10
Dependent Claim
12 words
The method of claim 8 where said adhesive is a thermoplastic adhesive.
Claim 11
Dependent Claim
13 words
The method of claim 9 where said thermoplastic adhesive is ethylene acrylic acid.
Claim 12
Dependent Claim
12 words
The method of claim 8 wherein said adhesive is a reactive adhesive.
Claim 13
Dependent Claim
17 words
The method of claim 11 wherein said reactive adhesive is an epoxy, phenolic, urethane or nylon adhesive.
Claim 14
Dependent Claim
15 words
The method of claim 8 where said substrate is a metal, wood or polymeric material.
Claim 15
Independent Claim
183 words
A method for adhering asphalt to a metal substrate comprising the steps of adhering an adhesive to the surface of said metal substrate and either simultaneously or subsequently adhering an activated surfasce of a densified random-fiber composite sheet, the sheet being prepared from fibrous reinforcement materials, binders and a heat-fusible organic polymer, to said adhesive, the activated surface being prepared by applying sufficient heat to a surface of the sheet to cause the heat-fusible organic polymer to soften and release at least a portion of the length of fibrous materials present at the surface of said sheet, said portion projecting outward from a plane defined by said surface, and contacting the exposed surface of said densified random-fiber composite sheet with hot asphalt such that said exposed surface is heated sufficiently to cause the heat-fusible organic polymer to soften and release at least a portion of the length of fibrous materials present at said exposed surface whereby said portion projects outward from a plane defined by the exposed surface and said asphalt flows around, and physically interacts with, said projected portion to adhere thereto.
Claim 16
Independent Claim
183 words
A method for adhering asphalt to a metal substrate comprising the steps of adhering an adhesive to the surface of said metal substrate and either simultaneously or subsequently adhering an activated surfasce of a densified random-fiber composite sheet, the sheet being prepared from fibrous reinforcement materials, binders and a heat-fusible organic polymer, to said adhesive, the activated surface being prepared by applying sufficient heat to a surface of the sheet to cause the heat-fusible organic polymer to soften and release at least a portion of the length of fibrous materials present at the surface of said sheet, said portion projecting outward from a plane defined by said surface, and contacting the exposed surface of said densified random-fiber composite sheet with hot asphalt such that said exposed surface is heated sufficiently to cause the heat-fusible organic polymer to soften and release at least a portion of the length of fibrous materials present at said exposed surface whereby said portion projects outward from a plane defined by the exposed surface and said asphalt flows around, and physically interacts with, said projected portion to adhere thereto.
Claim 17
Dependent Claim
15 words
The method of claim 14 where said metal substrate is a steel culvert or pipe.
Claim 18
Dependent Claim
27 words
The method of claim 15 where said steel culvert is preheated prior to said step of adhering an adhesive to the surface of said culvert or pipe.
Claim 19
Dependent Claim
12 words
The method of claim 16 where said adhesive comprises ethylene acrylic acid.
Claim 20
Dependent Claim
29 words
The method of claim 17 where the step of contacting the exposed surface of said densified random-fiber composite sheet with hot asphalt is conducted by dipping into hot asphalt.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-20 | 1990-10-20 | 1991-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-20 | 1994-10-20 | 1995-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-20 | 1998-10-20 | 1999-04-21 | $7700.00 | Window Closed / Lapsed |