US4636440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel process for coating substrates with glass-like films and coated substrates
Assignee: Johns Manville
•
Filing: 1985-10-28
•
Granted: 1987-01-13
•
Expires: 2005-10-28
Abstract
Abstract A sol-gel coated substrate is additionally coated with certain disclosed aqueous quaternary ammonium hydroxide and/or alkanol amine compounds. Through this procedure, the drying time achieved to effect a crack-free coated substrate is greatly reduced. Also disclosed are coated substrates prepared by the process of the present invention.
Inventors
- 👤 Sivananda S. Jada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:15
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C03; C03C; C03C17/00; C03C17/02; C03C25/00; C03C25/10; C03C25/42; C04B41/45; C04B41/52; C04B41/80; C04B41/81; C04B41/89; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
151 words
An improved process for coating and drying a substrate with a glass-like film comprising in order the steps of: (a) applying to the substrate an aqueous alcoholic solution containing a polymeric network of partially hydrolyzed silicon alkoxides; (b) applying to the thus coated substrate an additional coating of at least one aqueous compound selected from the group consisting of: (i) a quaternary ammonium hydroxide of the general formula NR 4 OH wherein each R independently represents hydrogen or a C 1 to C 10 alkyl group and (ii) an alkanol amine of the general formula H 2 NR 1 OH wherein R 1 represents a C 1 -C 10 alkylene group, whereby the surface of the coated substrate resulting from 1(a) is uniformly coated with said aqueous compound; and (c) drying the resulting coated substrate of 1(b) at room temperature for a period of time not to exceed about 6 hours.
Claim 2
Dependent Claim
151 words
An improved process for coating and drying a substrate with a glass-like film comprising in order the steps of: (a) applying to the substrate an aqueous alcoholic solution containing a polymeric network of partially hydrolyzed silicon alkoxides; (b) applying to the thus coated substrate an additional coating of at least one aqueous compound selected from the group consisting of: (i) a quaternary ammonium hydroxide of the general formula NR 4 OH wherein each R independently represents hydrogen or a C 1 to C 10 alkyl group and (ii) an alkanol amine of the general formula H 2 NR 1 OH wherein R 1 represents a C 1 -C 10 alkylene group, whereby the surface of the coated substrate resulting from 1(a) is uniformly coated with said aqueous compound; and (c) drying the resulting coated substrate of 1(b) at room temperature for a period of time not to exceed about 6 hours.
Claim 3
Dependent Claim
23 words
A process according to claim 1 wherein said aqueous quaternary ammonium hydroxide compound has a concentration in the range of 1N to 12N.
Claim 4
Dependent Claim
20 words
A process according to claim 2 wherein R in 1(b) represents hydrogen or a C 1 -C 6 alkyl radical.
Claim 5
Dependent Claim
17 words
A process according to claim 3 wherein said quaternary ammonium hydroxide compound is 6N aqueous ammonium hydroxide.
Claim 6
Dependent Claim
17 words
A process according to claim 4 wherein said aqueous ammonium hydroxide compound is at least partially vaporized.
Claim 7
Dependent Claim
19 words
A process according to claim 1 wherein R 1 in 1(b) represents a C 1 -C 6 alkylene radical.
Claim 8
Dependent Claim
17 words
A process according to claim 1 wherein the dried, coated substrate resulting from 1(c) is subsequently cured.
Claim 9
Dependent Claim
12 words
A process according to claim 1 wherein said substrate is glass fibers.
Claim 10
Dependent Claim
23 words
A dried, coated substrate prepared by the process of claim 1 and having a fire resistance meeting the requirements of ASTM E 119-83.
Claim 11
Dependent Claim
23 words
A dried, coated substrate prepared by the process of claim 4 and having a fire resistance meeting the requirements of ASTM E 119-83.
Claim 12
Dependent Claim
12 words
A process according to claim 1 wherein said silicon alkoxide is tetraethyoxysilane.
References Cited (Backward Citations)
US3870545A
Cited
US4045599A
Cited
US4150191A
Cited
US4297246A
Cited
US4288299A
Cited
US4476156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-12 | 1990-07-14 | 1991-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-12 | 1994-07-14 | 1995-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-12 | 1998-07-14 | 1999-01-13 | $7700.00 | Window Closed / Lapsed |