US3872051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesives containing metal powders
Assignee: Weyerhaeuser Co
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Filing: 1972-05-25
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Granted: 1975-03-18
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Expires: 1992-05-25
Abstract
Abstract Disclosed are liquid, curable adhesives having a pH of less than 3.5 and comprising an aldehyde condensation polymer and a finely divided metal selected from aluminum and iron. Such adhesives are particularly useful for application to cellulosic substrates such as wood. When the cured adhesive is subjected to hydrolytic conditions, the finely divided metal reacts with hydrogen ions leached from the adhesive and thereby prevents or markedly reduces degradation of the cellulosic substrate.
Inventors
- 👤 George T Tiedeman
- 👤 Maurice F Gillern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:54
CPC Classifications
C; C09; C09J; C09J161/00; C08; C08K; C08K3/00; C08K3/02; C08K3/08; C08L; C08L2666/00; C08L2666/54
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
45 words
IN A LIQUID, CURABLE ADHESIVE COMPOSITION COMPRISING AN ALDEHYDE CONDENSATION POLYMER AND HAVING A PH OF LESS THAN 3.5, THE IMPROVEMENT WHEREIN SAID COMPOSITION FURTHER COMPRISES A MINOR AMOUNT OF A METAL SELECTED FROM ALUMINUM AND IRON, SAID METAL BEING IN A FINELY DIVIDED FORM.
Claim 2
Dependent Claim
45 words
IN A LIQUID, CURABLE ADHESIVE COMPOSITION COMPRISING AN ALDEHYDE CONDENSATION POLYMER AND HAVING A PH OF LESS THAN 3.5, THE IMPROVEMENT WHEREIN SAID COMPOSITION FURTHER COMPRISES A MINOR AMOUNT OF A METAL SELECTED FROM ALUMINUM AND IRON, SAID METAL BEING IN A FINELY DIVIDED FORM.
Claim 3
Dependent Claim
30 words
The composition of claim 1 wherein the amount of said metal is such that when cured and exposed to hydrolytic condition, said adhesive exhibits a pH of at least 3.5.
Claim 4
Dependent Claim
42 words
The composition of claim 1 wherein said liquid composition has a pH of less than 2.5 and wherein the amount of said metal is such that when cured and exposed to hydrolytic conditions, said composition exhibits a pH of at least 3.5.
Claim 5
Dependent Claim
10 words
The composition of claim 1 wherein said metal is aluminum.
Claim 6
Dependent Claim
40 words
The composition of claim 1 wherein said aldehyde condensation polymer comprises the reaction product of a phenoplast or ketone-aldehyde condensation polymer with an amine salt selected from the hydrochloric, nitric and sulfuric acid salts of m-hydroxy aniline, 2,6-diaminopyridine and 4,4''-diaminodiphenylmethane.
Claim 7
Dependent Claim
10 words
The composition of claim 5 wherein said metal is aluminum.
Claim 8
Dependent Claim
15 words
The composition of claim 5 wherein said composition further comprises an alkylene donating curing agent.
Claim 9
Dependent Claim
15 words
The composititon of claim 7 wherein said curing agent comprises formaldehyde or a formaldehyde-forming compound.
Claim 10
Dependent Claim
24 words
The composition of claim 1 wherein said aldehyde condensation polymer comprises the reaction product of a ketone-aldehyde condensation polymer with a polyhydroxy aromatic compound.
Claim 11
Dependent Claim
10 words
The composition of claim 9 wherein said metal is aluminum.
Claim 12
Dependent Claim
21 words
The composition of claim 9 wherein said aldehyde condensation polymer comprises the reaction product of an acetone-formaldehyde condensation polymer with resorcinol.
Claim 13
Dependent Claim
10 words
The composition of claim 11 wherein said metal is aluminum.
Claim 14
Dependent Claim
13 words
The composition of claim 1 wherein said aldehyde condensation polymer comprises an aminoplast.
Claim 15
Dependent Claim
10 words
The composition of claim 13 wherein said metal is aluminum.
Claim 16
Dependent Claim
13 words
The composition of claim 1 wherein said aldehyde condensation polymer comprises a phenoplast.
Claim 17
Dependent Claim
10 words
The composition of claim 15 wherein said metal is aluminum.
Claim 18
Dependent Claim
79 words
In a liquid, curable adhesive composition having a pH of less than 3.5 and comprising an aldehyde condensation polymer, said polymer on a weight basis being the principal reactive component in said composition, the improvement comprising a minor amount of a metal selected from aluminum and iron, said metal being in a finely divided form and being present in such an amount that when cured and exposed to hydrolytic conditions, said composition exhibits a pH of at least 3.5.
Claim 19
Dependent Claim
79 words
In a liquid, curable adhesive composition having a pH of less than 3.5 and comprising an aldehyde condensation polymer, said polymer on a weight basis being the principal reactive component in said composition, the improvement comprising a minor amount of a metal selected from aluminum and iron, said metal being in a finely divided form and being present in such an amount that when cured and exposed to hydrolytic conditions, said composition exhibits a pH of at least 3.5.
Claim 20
Dependent Claim
10 words
The composition of claim 17 wherein said metal is aluminum.
Claim 21
Dependent Claim
16 words
The composition of claim 17 wherein said liquid composition has a pH of less than 2.5.
Claim 22
Dependent Claim
67 words
In a liquid, curable adhesive composition having a pH of less than 3.5 and comprising an aldehyde condensation polymer and a curing agent for said polymer, the amounts of said polymer and curing agent being such that reaction therebetween will cause said composition to solidify, the improvement comprising a minor amount of a metal selected from aluminum and iron, said metal being in a finely divided form.
Claim 23
Dependent Claim
67 words
In a liquid, curable adhesive composition having a pH of less than 3.5 and comprising an aldehyde condensation polymer and a curing agent for said polymer, the amounts of said polymer and curing agent being such that reaction therebetween will cause said composition to solidify, the improvement comprising a minor amount of a metal selected from aluminum and iron, said metal being in a finely divided form.
Claim 24
Dependent Claim
30 words
The composition of claim 20 wherein the amount of said metal is such that when cured and exposed to hydrolytic conditions, said composition exhibits a pH of at least 3.5.
Claim 25
Dependent Claim
10 words
The composition of claim 21 wherein said metal is aluminum.
Claim 26
Dependent Claim
42 words
The composition of claim 20 wherein said liquid composition has a pH of less than 2.5 and wherein the amount of said metal is such that when cured and exposed to hydrolytic conditions, said composition exhibits a pH of at least 3.5.
Claim 27
Dependent Claim
10 words
The composition of claim 23 wherein said metal is aluminum.
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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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |