US3957703A
Expired / Lapsed
US
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Plywood adhesive and use thereof
Assignee: Georgia-Pacific LLC
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Filing: 1974-02-25
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Granted: 1976-05-18
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Expires: 1994-02-25
Abstract
Abstract A phenolic-aldehyde plywood adhesive containing as an extender a water-insoluble, acid-polymerized lignosulfonate.
Inventors
- 👤 Charles H. Ludwig
- 👤 Albert W. Stout, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:15
CPC Classifications
C; C08; C08H; C08H6/00; C09; C09J; C09J161/00; C09J161/04; C09J161/06; C08L; C08L2666/00; C08L2666/02; C08L2666/26; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24066; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31957; Y10T428/3196
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
17 words
In a phenol-aldehyde plywood adhesive, the improvement of using as an extender, a water-insoluble, acid polymerized lignosulfonate.
Claim 2
Dependent Claim
17 words
In a phenol-aldehyde plywood adhesive, the improvement of using as an extender, a water-insoluble, acid polymerized lignosulfonate.
Claim 3
Dependent Claim
42 words
A composition according to claim 1 wherein the water-insoluble, acid polymerized lignosulfonate is polymerized from a spent sulfite liquor to the extent such that the dry polymerized lignosulfonate will increase less than seven times its dry bulk volume upon exposure to water.
Claim 4
Dependent Claim
20 words
An adhesive according to claim 2 wherein the phenolaldehyde resin in the adhesive is a resin of phenol and formaldehyde.
Claim 5
Dependent Claim
35 words
An adhesive according to claim 2 wherein the lignosulfonate is polymerized such that the dry polymerized lignosulfonate will increase in volume from about two to four times its dry bulk volume upon exposure to water.
Claim 6
Dependent Claim
20 words
An adhesive according to claim 4 wherein the phenolaldehyde resin in the adhesive is a resin of phenol and formaldehyde.
Claim 7
Dependent Claim
57 words
In a process for the manufacture of plywood wherein a phenol-aldehyde plywood adhesive is used, the improvement of using as an extender in the phenol-aldehyde adhesive, a water-insoluble, acid polymerized lignosulfonate, said lignosulfonate being polymerized to the extent that the lignosulfonate will increase in volume less than seven times its dry bulk volume upon exposure to water.
Claim 8
Dependent Claim
57 words
In a process for the manufacture of plywood wherein a phenol-aldehyde plywood adhesive is used, the improvement of using as an extender in the phenol-aldehyde adhesive, a water-insoluble, acid polymerized lignosulfonate, said lignosulfonate being polymerized to the extent that the lignosulfonate will increase in volume less than seven times its dry bulk volume upon exposure to water.
Claim 9
Dependent Claim
46 words
A process according to claim 6 wherein the phenol-aldehyde plywood adhesive is a phenol-formaldehyde adhesive and said polymerized lignosulfonate is polymerized to the extent that the polymerized lignosulfonate will increase in volume from about two to four times its dry bulk volume upon exposure to water.
Claim 10
Dependent Claim
17 words
A wood laminate consisting essentially of wood plys bonded together by a phenol-aldehyde adhesive of claim 1.
Claim 11
Dependent Claim
17 words
A wood laminate consisting essentially of wood plys bonded together by a phenol-aldehyde adhesive of claim 2.
Claim 12
Dependent Claim
17 words
A wood laminate consisting essentially of wood plys bonded together by a phenol-aldehyde adhesive of claim 5.
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) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |