US4424075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnating compositions for cellulose containing materials
Assignee: Dynamit Nobel AG
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Filing: 1982-02-23
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Granted: 1984-01-03
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Expires: 2002-02-23
Abstract
Abstract Agent for impregnating materials that contain cellulose, mainly paper and wood. The active ingredient is a mixture of alkali aluminate and alkyl silanols that exhibits an intense hydrophobing effect at low concentrations. The agent can be employed in aqueous solution, e.g. in an enclosed space without the special exhaust devices required with volatile solvents. The solution is storage-stable. It contains preferably between 0.1 and 2.0% by weight of alkyl silanol and between 0.03 and 0.1% by weight of alkali aluminate.
Inventors
- 👤 Werner Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:26
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0836; D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/13; B; B27; B27K; B27K2240/00; B27K2240/70; B27K3/00; B27K3/52
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
37 words
Composition for impregnating cellulose-containing materials, which composition comprises an aqueous or aqueous alcohol solution of a mixture of an alkali aluminate and at least one alkyl silanol wherein the alkyl is selected from ethyl, propyl and n-butyl.
Claim 2
Dependent Claim
37 words
Composition for impregnating cellulose-containing materials, which composition comprises an aqueous or aqueous alcohol solution of a mixture of an alkali aluminate and at least one alkyl silanol wherein the alkyl is selected from ethyl, propyl and n-butyl.
Claim 3
Dependent Claim
24 words
Composition as claim in claim 1, wherein the ratio of the alkali aluminate to alkyl silanols in said mixture is from 1:10 to 10:1.
Claim 4
Dependent Claim
26 words
Composition as claimed in claim 1 containing from 0.03% to 1.0% by weight of alkali aluminate and from 0.1 to 2.0% by weight of alkyl silanol.
Claim 5
Dependent Claim
13 words
Composition as claimed in claim 1, wherein the alkyl silanol is ethyl silanol.
Claim 6
Dependent Claim
13 words
Composition as claimed in claim 1, wherein the alkyl silanol is propyl silanol.
Claim 7
Dependent Claim
13 words
Composition as claimed in claim 1, wherein the alkyl silanol is n-butyl silanol.
Claim 8
Dependent Claim
20 words
Composition as claimed in claim 1, wherein a mixture of alkyl silanols is used in conjunction with said alkali aluminate.
Claim 9
Dependent Claim
13 words
Composition as claimed in claim 1, wherein the alkali aluminate is sodium aluminate.
Claim 10
Dependent Claim
13 words
Composition as claimed in claim 1, wherein said alkali aluminate is potassium aluminate.
References Cited (Backward Citations)
US2729572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-02 | 1987-07-04 | 1988-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-02 | 1991-07-04 | 1992-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-02 | 1995-07-04 | 1996-01-03 | $7700.00 | Window Closed / Lapsed |