US5540948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating a substrate with ceramic coating
Assignee: Dow Silicones Corp
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Filing: 1995-03-28
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Granted: 1996-07-30
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Expires: 2015-03-28
Abstract
Abstract Disclosed is a method of forming a coating on a substrate. The method involves coating the substrate with a resinous co-hydrolysate having units of the formula HSi(OH) x (OR) y O z/2 and Si(OH) a (OR) b O c/2 in a ratio of 1:3 or less followed by heating the coated substrate to a temperature of between about 50° and about 1000° C.
Inventors
- 👤 Loren A. Haluska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:26
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B35/00; C04B35/622; C04B35/62222; C04B41/45; C04B41/50; C04B41/5025; C04B41/5035; C04B41/80; C04B41/81; C04B41/85; C04B41/87; C07; C07F; C07F7/00; C07F7/02; C07F7/04; C08; C08G; C08G77/00; C08G77/04; C08G77/12; C09; C09D; C09D183/00; C09D183/04; H; H10; H10W; H10W74/00; H10W74/40; H10W74/47; H10W74/476; C04B2111/00; C04B2111/00474; C04B2111/00844
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
116 words
A method of forming a coating on a substrate comprising: coating the substrate with a composition comprising a resinous co-hydrolysate having units of the formula HSi(OH) x (OR) y O z/2 and Si(OH) a (OR) b O c/2 and a solvent, wherein each R is independently an organic group which, when bonded to silicon through the oxygen atom, forms a hydrolyzable substituent, x=0-2, y=0-2, z=1-3, x+y+z=3, a=0-3, b=0-3, c=1-4, a+b+c=4 and there are less than 3 units of HSi(OH) x (OR) y O z/2 per unit of Si(OH) a (OR) b O c/2 ; and heating the coated substrate to a temperature of between about 50° and about 1000° C. to convert the coating to silica.
Claim 2
Independent Claim
116 words
A method of forming a coating on a substrate comprising: coating the substrate with a composition comprising a resinous co-hydrolysate having units of the formula HSi(OH) x (OR) y O z/2 and Si(OH) a (OR) b O c/2 and a solvent, wherein each R is independently an organic group which, when bonded to silicon through the oxygen atom, forms a hydrolyzable substituent, x=0-2, y=0-2, z=1-3, x+y+z=3, a=0-3, b=0-3, c=1-4, a+b+c=4 and there are less than 3 units of HSi(OH) x (OR) y O z/2 per unit of Si(OH) a (OR) b O c/2 ; and heating the coated substrate to a temperature of between about 50° and about 1000° C. to convert the coating to silica.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the substrate is an electronic device.
Claim 4
Dependent Claim
19 words
The method of claim 1 wherein the resinous co-hydrolysate is dissolved in an acidified oxygen containing polar organic solvent.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein R is an alkyl of 1-6 carbon atoms.
Claim 6
Dependent Claim
30 words
The method of claim 3 wherein the solvent is present in an amount such that the resinous co-hydrolysate is diluted to between about 1 and about 50 weight percent solids.
Claim 7
Dependent Claim
19 words
The method of claim 1 wherein the composition comprising the resinous co-hydrolysate also contains a platinum or rhodium catalyst.
Claim 8
Independent Claim
154 words
A method of forming a coating on a substrate comprising: coating the substrate with a composition comprising a resinous co-hydrolysate having units of the formula HSi(OH) x (OR) y O z/2 , Si(OH) a (OR) b O c/2 , ceramic oxide precursor units comprising an element selected from the group consisting of titanium, zirconium, aluminum, tantalum, vanadium, niobium, boron and phosphorous with at least one hydrolyzable substituent selected from the group consisting of alkoxy and acyloxy and a solvent, wherein each R is independently an organic group which, when bonded to silicon through the oxygen atom, forms a hydrolyzable substituent, x=0-2, y=0-2, z=1-3, x+y+z=3, a=0-3, b=0-3, c=1-4, a+b+c=4 and there are less than 3 units of HSi(OH) x (OR) y O z/2 per unit of Si(OH) a (OR) b O c/2 ; and heating the coated substrate to a temperature of between about 50° and about 1000° C. to form a ceramic oxide coating.
Claim 9
Independent Claim
154 words
A method of forming a coating on a substrate comprising: coating the substrate with a composition comprising a resinous co-hydrolysate having units of the formula HSi(OH) x (OR) y O z/2 , Si(OH) a (OR) b O c/2 , ceramic oxide precursor units comprising an element selected from the group consisting of titanium, zirconium, aluminum, tantalum, vanadium, niobium, boron and phosphorous with at least one hydrolyzable substituent selected from the group consisting of alkoxy and acyloxy and a solvent, wherein each R is independently an organic group which, when bonded to silicon through the oxygen atom, forms a hydrolyzable substituent, x=0-2, y=0-2, z=1-3, x+y+z=3, a=0-3, b=0-3, c=1-4, a+b+c=4 and there are less than 3 units of HSi(OH) x (OR) y O z/2 per unit of Si(OH) a (OR) b O c/2 ; and heating the coated substrate to a temperature of between about 50° and about 1000° C. to form a ceramic oxide coating.
Claim 10
Dependent Claim
12 words
The method of claim 7 wherein the substrate is an electronic device.
Claim 11
Dependent Claim
19 words
The method of claim 7 wherein the resinous co-hydrolysate is dissolved in an acidified oxygen containing polar organic solvent.
Claim 12
Dependent Claim
14 words
The method of claim 7 wherein R is an alkyl of 1-6 carbon atoms.
Claim 13
Dependent Claim
30 words
The method of claim 9 wherein the solvent is present in an amount such that the resinous co-hydrolysate is diluted to between about 1 and about 50 weight percent solids.
Claim 14
Dependent Claim
19 words
The method of claim 7 wherein the composition comprising the resinous co-hydrolysate also contains a platinum or rhodium catalyst.
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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) | 1999-07-30 | 2000-01-29 | 2000-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-30 | 2004-01-29 | 2004-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-30 | 2008-01-29 | 2008-07-30 | $7700.00 | Window Closed / Lapsed |