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US4307206A
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Urea-formaldehyde resin adhesive
Assignee: Oshika Shinko Co Ltd
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Filing: 1980-07-07
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Granted: 1981-12-22
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Expires: 2000-07-07
Abstract
Abstract A urea-formaldehyde resin adhesive comprising a powder of a substance having the property of gradually reacting with an acid and thus consuming the acid.
Inventors
- 👤 Mitsuo Higuchi
- 👤 Isao Sakata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:23
CPC Classifications
C; C09; C09J; C09J161/00; C09J161/20; C09J161/22; C09J161/24; Y; Y10; Y10S; Y10S525/00; Y10S525/936; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31957; Y10T428/3196
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
118 words
A urea-formaldehyde resin adhesive containing a sufficient amount of a powder of an acid reacting substance to react with substantially all acid in said resin adhesive as it forms during curing of said adhesive, said powder being selected from the group consisting of (i) a powder of an alkali glass having a composition of the formula (X.sub.2 O).sub.x (YO).sub.y (SiO.sub.2)(B.sub.2 O.sub.3).sub.z (Al.sub.2 O.sub.3).sub.n wherein X represents an alkali metal, Y represents an alkaline earth metal, x and y each independently represent a a number of from 0.05 to 0.5, z represents a number of from 0 to 0.5, and n represents a number of from 0 to 0.2, and (ii) microcapsules containing a powder of an alkaline substance.
Claim 2
Dependent Claim
118 words
A urea-formaldehyde resin adhesive containing a sufficient amount of a powder of an acid reacting substance to react with substantially all acid in said resin adhesive as it forms during curing of said adhesive, said powder being selected from the group consisting of (i) a powder of an alkali glass having a composition of the formula (X.sub.2 O).sub.x (YO).sub.y (SiO.sub.2)(B.sub.2 O.sub.3).sub.z (Al.sub.2 O.sub.3).sub.n wherein X represents an alkali metal, Y represents an alkaline earth metal, x and y each independently represent a a number of from 0.05 to 0.5, z represents a number of from 0 to 0.5, and n represents a number of from 0 to 0.2, and (ii) microcapsules containing a powder of an alkaline substance.
Claim 3
Dependent Claim
30 words
The adhesive of claim 1 wherein the amount of the powder of said substance is 5 to 50 parts by weight per 100 parts by weight of a urea-formaldehyde resin.
Claim 4
Dependent Claim
21 words
The adhesive of claim 1 wherein the powder of said substance has an average particle size of 0.1 to 80 microns.
Claim 5
Dependent Claim
54 words
The adhesive of claim 1 wherein said alkaline substance is calcium silicate, calcium carbonate, sodium carbonate, glass having stronger alkalinity than the alkali glass of the above formula, a basic natural mineral, a cured product of an alkaline phenol resin, a cured product of a melamine resin, or a mixture of any of these.
Claim 6
Dependent Claim
61 words
The adhesive of claim 1 wherein said alkali glass has the composition of the general formula in which X represents sodium, Y represents calcium, x represents a number of from 0.05 to 0.5, y represents a number of from 0.05 to 0.5, z represents a number of from 0 to 0.3, and n represents a number of from 0 to 0.2.
Claim 7
Dependent Claim
61 words
The adhesive of claim 1 wherein said alkali glass has the composition of the general formula in which X represents sodium, Y represents calcium, x represents a number of from 0.15 to 0.4, y represents a number of from 0.15 to 0.4, z represents a number of from 0 to 0.2, and n represents a number of from 0 to 0.1.
References Cited (Backward Citations)
US3701743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |