US3909470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting adhesive compositions extended with cellulosic paper mill sludges
Assignee: Officemax Inc
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Filing: 1974-09-23
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Granted: 1975-09-30
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Expires: 1994-09-23
Abstract
Abstract Thermosetting resinous adhesives, useful particularly as plywood or lumber laminating adhesives, comprise a phenol-, resorcinol-, urea-, or melamine-formaldehyde resin and an extender therefor. The extender comprises an aqueous cellulosic pulp used in relative proportions of from about 1-50 parts by weight extender for each 100 parts by weight resin, dry solids basis. Water is included in amount sufficient to impart to the compositions a viscosity of 1,000-12,000 centipoises The cellulosic pulp extender preferably comprises the pulp mill paper making waste sludges containing the discarded cellulosic fines separated from the pulp products of the mill. Its inclusion has the effect of holding the water at the glue line and accordingly of improving significantly the assembly time characteristics of the adhesive.
Inventors
- 👤 Alan L Lambuth
- 👤 William Montgomery Hearon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:27
CPC Classifications
C; C09; C09J; C09J161/00; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/26; Y; Y10; Y10S; Y10S162/00; Y10S162/09
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
123 words
A THERMOSETTING RESINOUS ADHESIVE COMPOSITION COMPRISING: A. AT LEAST ONE THERMOSETTING RESIN OF THE CLASS CONSISTING OF THE THERMOSETTING UREAFORMALDEHYDE RESINS, AND MELAMINE-FORMALDEHYDE RESINS, B. AN EXTENDER FOR THE RESIN COMPRISING AN AQUEOUS CELLULOSIC PULP HYDRATED TO A FREENESS OF NOT OVER 400 CC. CANADIAN STANDARD FREENESS AND HAVING A CONTENT OF CELLULOSIC FIBERS A PREPONDERANT PROPOTION OF WHICH HAVING MAXIMUM LENGTH OF NOT OVER ABOUT 1/8 INCHE, THE RESIN AND EXTENDER BEING USED IN RELATIVE PROPORTIONS OF FROM ABOUT ONE FIFTY PARTS EXTENDER FOR EACH ONE HUNDRED RESINS, PARTS BEING EXPRESSED AS PARTS BY WEIGHT ON A DRY SOLIDS BASIS, AND D. WATER USED IN AMOUNT SUFFICIENT TO IMPART TO THE COMPOSITION A VICOSITY OF FROM ABOUT 1,000 TO ABOUT 12,000 CENTIPOISES.
Claim 2
Dependent Claim
123 words
A THERMOSETTING RESINOUS ADHESIVE COMPOSITION COMPRISING: A. AT LEAST ONE THERMOSETTING RESIN OF THE CLASS CONSISTING OF THE THERMOSETTING UREAFORMALDEHYDE RESINS, AND MELAMINE-FORMALDEHYDE RESINS, B. AN EXTENDER FOR THE RESIN COMPRISING AN AQUEOUS CELLULOSIC PULP HYDRATED TO A FREENESS OF NOT OVER 400 CC. CANADIAN STANDARD FREENESS AND HAVING A CONTENT OF CELLULOSIC FIBERS A PREPONDERANT PROPOTION OF WHICH HAVING MAXIMUM LENGTH OF NOT OVER ABOUT 1/8 INCHE, THE RESIN AND EXTENDER BEING USED IN RELATIVE PROPORTIONS OF FROM ABOUT ONE FIFTY PARTS EXTENDER FOR EACH ONE HUNDRED RESINS, PARTS BEING EXPRESSED AS PARTS BY WEIGHT ON A DRY SOLIDS BASIS, AND D. WATER USED IN AMOUNT SUFFICIENT TO IMPART TO THE COMPOSITION A VICOSITY OF FROM ABOUT 1,000 TO ABOUT 12,000 CENTIPOISES.
Claim 3
Dependent Claim
17 words
The adhesive composition of claim 1 wherein the thermosetting resin consists essentially of a urea formaldehyde resin.
Claim 4
Dependent Claim
16 words
The adhesive composition of claim 1 wherein the thermosetting resin consists essentially of a melamine-formaldehyde resin.
Claim 5
Dependent Claim
14 words
The adhesive composition of claim 1 wherein the cellulosic pulp comprises a chemical pulp.
Claim 6
Dependent Claim
14 words
The adhesive composition of claim 1 wherein the cellulosic pulp comprises a sulfite pulp.
Claim 7
Dependent Claim
14 words
The adhesive composition of claim 1 wherein the cellulosic pulp comprises a kraft pulp.
Claim 8
Dependent Claim
14 words
The adhesive composition of claim 1 wherein the cellulosic pulp comprises a soda pulp.
Claim 9
Dependent Claim
14 words
The adhesive composition of claim 1 wherein the cellulosic pulp comprises a mechanical pulp.
Claim 10
Dependent Claim
13 words
The adhesive composition of claim 1 wherein the cellulosic pulp comprises groundwood pulp.
Claim 11
Dependent Claim
29 words
The adhesive composition of claim 1 wherein the pulp comprises pulp mill papermaking waste sludge containing the discarded cellulosic fines separated from the papermaking pulp products of the mill.
Claim 12
Dependent Claim
19 words
The adhesive composition of claim 1 wherein the cellulosic fibers have maximum lengths of not over about 1/16 inch.
Claim 13
Dependent Claim
30 words
The adhesive composition of claim 1 wherein the resin and extender are used in relative proportions of from about 3 to about 30 parts extender for each 100 parts resin.
Claim 14
Dependent Claim
84 words
The adhesive composition of claim 1 wherein the resin consists essentially of a thermosetting urea-formaldehyde resin having a pH of 5-8, the pulp comprises pulp mill papermaking waste sludge containing the discarded cellulosic fines separated from papermaking pulp products of the mill, wherein at least 90% by weight of the fibers have maximum lengths of not over about 1/16 inch, and wherein the resin and extender are used in relative proportions of from about 3 to about 30 parts by weight, dry solids basis.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |