US4046952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of overlayed product with phenol-formaldehyde barrier for polyisocyanate binder
Assignee: Ellingson Timber Co
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Filing: 1975-10-08
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Granted: 1977-09-06
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Expires: 1995-10-08
Abstract
Abstract Production of consolidated overlayed product comprising a core of particulate cellulosic material bound with a polyisocyanate binder and an overlay bound to the core through a phenolformaldehyde resin which forms a barrier inhibiting penetration of the polyisocyanate into the overlay.
Inventors
- 👤 Philip D. Shoemaker
- 👤 Hobert O. McQueary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:55
CPC Classifications
C; C08; C08L; C08L97/00; C08L97/02; B; B27; B27N; B27N3/00; B27N3/06; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6484; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/253; Y10T428/31504; Y10T428/31551; Y10T428/31591; Y10T428/31594; Y10T428/31942; Y10T428/31949; Y10T428/31964
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
118 words
A method of making an overlayed product with comminuted cellulosic material as the core thereof, comprising producing a furnish of the comminuted cellulosic material by mixing therewith an organic polyisocyanate which operates upon the application of heat and pressure to bond the material, preparing as assembly comprising a mat formed of such furnish and against a side of said mat a sheet overlay, with phenol-formaldehyde resin distributed in said overlay and presented by said overlay toward said mat, and consolidating the furnish in said mat and said overlay to form an integral product by the application of heat and pressure, the phenol-formaldehyde resin during such consolidation forming a resinous barrier inhibiting penetration of the polyisocyanate through the overlay.
Claim 2
Independent Claim
118 words
A method of making an overlayed product with comminuted cellulosic material as the core thereof, comprising producing a furnish of the comminuted cellulosic material by mixing therewith an organic polyisocyanate which operates upon the application of heat and pressure to bond the material, preparing as assembly comprising a mat formed of such furnish and against a side of said mat a sheet overlay, with phenol-formaldehyde resin distributed in said overlay and presented by said overlay toward said mat, and consolidating the furnish in said mat and said overlay to form an integral product by the application of heat and pressure, the phenol-formaldehyde resin during such consolidation forming a resinous barrier inhibiting penetration of the polyisocyanate through the overlay.
Claim 3
Dependent Claim
9 words
A product prepared by the method of claim 1.
Claim 4
Dependent Claim
41 words
The method of claim 1, wherein the overlay comprises a water permeable sheet such as a paper sheet and the like, and at the initiation of the consolidation by the application of heat and pressure, said sheet is impregnated with water.
Claim 5
Dependent Claim
34 words
The method of claim 3, wherein said sheet is impregnated with water by distributing water over the side of the sheet facing away from said mat after preparing the assembly comprising mat and overlay.
Claim 6
Dependent Claim
45 words
The method of claim 1, wherein said assembly is prepared with an overlay formed of an outer sheet layer and an inner sheet layer disposed toward said mat from the outer sheet layer, said inner sheet layer comprising phenol-formaldehyde resin supported in a cellulosic carrier.
Claim 7
Dependent Claim
48 words
The method of claim 1, wherein said assembly is prepared with said mat against an overlay comprising a sheet of wood veneer and a paper glueline disposed between said sheet of wood veneer and said mat, the paper glueline comprising a pheno-formaldehyde resin supported in a cellulosic carrier.
Claim 8
Dependent Claim
119 words
In the manufacture of an overlayed product, the method comprising producing a furnish of comminuted cellulosic material by mixing it with an organic polyisocyanate which operates upon the application of heat and pressure to bond the material, preparing an assembly comprising a mat of such furnish with such mat disposed between overlays disposed on opposite sides of the mat, each of such overlays comprising a sheet and having phenol-formaldehyde distributed in the overlay presented by the overlay toward said mat, and consolidating the furnish in said mat and said overlays to form the product by the application of heat and pressure, the phenol-formaldehyde resin during such consolidation forming a resinous barrier inhibiting penetration of the overlays by said polyisocyanate.
Claim 9
Dependent Claim
119 words
In the manufacture of an overlayed product, the method comprising producing a furnish of comminuted cellulosic material by mixing it with an organic polyisocyanate which operates upon the application of heat and pressure to bond the material, preparing an assembly comprising a mat of such furnish with such mat disposed between overlays disposed on opposite sides of the mat, each of such overlays comprising a sheet and having phenol-formaldehyde distributed in the overlay presented by the overlay toward said mat, and consolidating the furnish in said mat and said overlays to form the product by the application of heat and pressure, the phenol-formaldehyde resin during such consolidation forming a resinous barrier inhibiting penetration of the overlays by said polyisocyanate.
Claim 10
Dependent Claim
9 words
A product prepared by the method of claim 7.
Claim 11
Dependent Claim
44 words
The method of claim 7, wherein each overlay comprises a water permeable sheet such as a paper sheet and the like, and at the initiation of consolidation by the application of heat and pressure the sheet in the overlays are essentially saturated with water.
Claim 12
Dependent Claim
28 words
The method of claim 7, wherein each overlay comprises a veneer sheet layer and phenol-formaldehyde resin on the side of said veneer sheet layer which faces the mat.
Claim 13
Dependent Claim
15 words
The method of claim 10, wherein the phenol-formaldehyde resin is supported in a cellulosic carrier.
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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |