US3687882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silane-titanate dispersions for coating aluminum
Assignee: Nexcel Corp
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Filing: 1971-04-29
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Granted: 1972-08-29
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Expires: 1991-04-29
Abstract
Abstract Composition and method are provided for enhancing adhesive bonding to an aluminum surface and protecting the aluminum surface from corrosive and other chemical degradation. The improved bonding surface comprises a composition derived from cohydrolysis of a diamino-substituted silane and a titanate. The corrosion resistant composition is derived from a cohydrolysed composition of an oxysubstituted silane and a titanate, combined with hexavalent chromium. The compositions may be applied by any convenient means in a liquid media to the aluminum surface, preferably cleaned prior to application of the above compositions.
Inventors
- 👤 Ernest M Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:54
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/68; C09; C09D; C09D4/00; C23C22/06; C23C22/24; C23C2222/00; C23C2222/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
17 words
A composition according to claim 1, wherein R is methyl, T is isopropyl and Y is acetoacetone.
Claim 2
Dependent Claim
163 words
A composition useful in providing corrosion protection for aluminum and aluminum alloys which comprises an aqueous reaction product of a silane, a titanate, and a hexavalent chromium compound, comprising a 5 to 50 weight percent dispersion in a hydroxylic medium having a mole ratio of silane to titanate of 1-6:1, wherein said silane is of the formula: Y''-R'''''' Si-3 wherein R is alkyl of from one to six carbon atoms, R'''''' is alkylene of from two to six carbon atoms, and Y'' is an oxy-substituted hydrocarbon radical free of unsaturation of from two to six carbon atoms wherein at least one oxy group is hydroxyl or a group capable of producing hydroxyl upon hydrolysis; said titanate is of the formula: (TO)4 TI . Y wherein T is alkyl of from 1-6 carbon atoms, and Y is a 1,3-dioxo compound of from 3-8 carbon atoms; the hexavalent chromium being present in from 1 to 4 parts of chromium per part of silane and titanate.
Claim 3
Dependent Claim
40 words
A composition according to claim 3, wherein said silane and titanate are combined in a aqueous medium and heated to remove at least 50 percent of volatile materials at a temperature in the range of about 80* to 125* C.
Claim 4
Dependent Claim
18 words
A composition according to claim 4, wherein at least 75 percent of the theoretical volatile materials are removed.
Claim 5
Dependent Claim
24 words
A composition according to claim 3, having from 20 to 150 weight percent of colloidal alumina based on the weight of said siloxane-titanate combination.
Claim 6
Dependent Claim
18 words
A composition according to claim 3 wherein said siloxane is gamma -glycidoxypropyltrimethoxysilane and said titanate is tetraisopropoxy titanate.
Claim 7
Dependent Claim
45 words
A composition according to claim 7 wherein the chromium compound is used in an amount to provide 1.5 to 3 parts of chromium per part of silane and titanate, and colloidal alumina in from 50 to 75 weight percent based on said silane and titanate.
Claim 8
Independent Claim
123 words
A method of preparing an adhering protective coating composition for aluminum which comprises; combining neat a silane of the formula: H2NR'''' NHR'' -Si(OR)3 wherein R is alkyl of from one to six carbon atoms, R'' is alkylene of from two to six carbon atoms, and R'''' is alkylene of from two to three carbon atoms, there being from two to three carbon atoms between the nitrogen atoms, with a titanate of the formula: (TO)4 Ti . Y wherein T is alkyl of from 1 to 6 carbon atoms, and Y is a 1,3-dioxo compound of from three to eight carbon atoms in a mole ratio of 1-6:1, and adding water at a rate sufficient to prevent gel formation or formation of a precipitate.
Claim 9
Dependent Claim
24 words
A method according to claim 9, wherein said silane is N-Beta -aminoethyl- gamma -aminopropyltrimethoxysilane and said titanate is the acetylacetonate chelate of tetraisopropyl titanate.
References Cited (Backward Citations)
US2512058A
Cited
US2721855A
Cited
US3153000A
Cited
US3312622A
Cited
US3258382A
Cited
US3368928A
Cited
US3395036A
Cited
US3627565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |