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US5021091A
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Hard coating compositions
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1990-01-16
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Granted: 1991-06-04
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Expires: 2010-01-16
Abstract
Abstract A hard coating composition comprising an organic silicon compound and inorganic submicron particles such as silica sol and antimony oxide sol is improved in curing properties and shelf stability by blending aluminum perchlorate as the curing catalyst.
Inventors
- 👤 Mitsuhiko Takarada
- 👤 Kazuharu Sato
- 👤 Kenji Yamamoto
- 👤 Shigeru Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:09
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/043; C08J7/0427; C08J7/046; C09; C09D; C09D183/00; C09D183/04; G02B1/105; G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/111; G02B1/14; C08J2483/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
122 words
A hard coating composition comprising in admixture, (A) an organic silicon compound of the formula: R.sup.1.sub.a Si(OR.sup.2).sub.4-a wherein R 1 is selected from the class consisting of epoxy containing organic groups having 2 to 8 carbon atoms, alkyl groups having 1 to 6 carbon atoms, alkenyl groups having 2 to 6 carbon atoms, halo-alkyl groups having 1 to 6 carbon atoms, and aryl groups having 6 to 10 carbon atoms, R 2 is selected from the class consisting of hydrogen, alkyl groups having 1 to 4 carbon atoms, alkoxyalkyl groups having 2 to 8 carbon atoms, and acyl groups, and letter a is equal to 1, 2 or 3, or a partial hydrolysate thereof, (B) inorganic submicron particles, and (C) aluminum perchlorate.
Claim 2
Dependent Claim
122 words
A hard coating composition comprising in admixture, (A) an organic silicon compound of the formula: R.sup.1.sub.a Si(OR.sup.2).sub.4-a wherein R 1 is selected from the class consisting of epoxy containing organic groups having 2 to 8 carbon atoms, alkyl groups having 1 to 6 carbon atoms, alkenyl groups having 2 to 6 carbon atoms, halo-alkyl groups having 1 to 6 carbon atoms, and aryl groups having 6 to 10 carbon atoms, R 2 is selected from the class consisting of hydrogen, alkyl groups having 1 to 4 carbon atoms, alkoxyalkyl groups having 2 to 8 carbon atoms, and acyl groups, and letter a is equal to 1, 2 or 3, or a partial hydrolysate thereof, (B) inorganic submicron particles, and (C) aluminum perchlorate.
Claim 3
Dependent Claim
22 words
The composition of claim 1 wherein said inorganic submicron particles are of antimony oxide sol, silica sol, titania sol or alumina sol.
Claim 4
Dependent Claim
35 words
The composition of claim 1 wherein said inorganic submicron particles are of antimony oxide sol, silica sol, titania sol or alumina sol which has been treated with a basic material or stabilized under basic conditions.
Claim 5
Dependent Claim
20 words
The composition of claim 3 wherein the pH of said sol is in the range of from 6 to 9.
Claim 6
Dependent Claim
17 words
The composition of claim 1 wherein aluminum perchlorate (C) is Al(ClO 4 ) 3 .6H 2 O.
Claim 7
Dependent Claim
24 words
The composition of claim 1 wherein aluminum perchlorate (C) is present in an effective amount to adjust the composition to pH 2 to 6.5.
Claim 8
Dependent Claim
28 words
The composition of claim 5 wherein Al(ClO 4 ) 3 .6H 2 O is present in an effective amount to adjust the composition to pH 2.5 to 5.5.
Claim 9
Dependent Claim
32 words
The composition of claim 1 comprising 100 parts by weight of component (A), 5 to 200 parts by weight of component (B), and 0.1 to 10 parts by weight of component (C).
Claim 10
Dependent Claim
25 words
The composition of claim 1, wherein R 1 is selected from the group consisting of: glycidoxypropyl, epoxycyclohexylethyl, methyl, ethyl, propyl, vinyl, allyl, butyl, and phenyl.
Claim 11
Dependent Claim
28 words
The composition of claim 1, wherein R 2 is selected from the group consisting of: a hydrogen atom, methyl, ethyl, propyl, butyl, methoxymethyl, methoxyethyl, ethoxyethyl, acetyl and propionyl.
Claim 12
Dependent Claim
39 words
The composition of claim 1, wherein component (A) is selected from the group consisting of: 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 2-(3',4'-epoxycyclohexyl)ethyltrimethoxysilane, 2-(3',4'-epoxycyclohexyl)ethyltriethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, vinyltris(2-ethoxyethoxy)silane, vinylmethyldimethoxysilane, vinylmethyldiethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, phenylmethyldimethoxysilane, phenylmethyldiethoxysilane, phenylvinyldimethoxysilane, phenylvinyldiethoxysilane, diphenyldimethoxysilane, and diphenyldiethoxysilane.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-03 | 1998-12-03 | 1999-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-03 | 2002-12-03 | 2003-06-04 | $7700.00 | Window Closed / Lapsed |