US4442177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkyl ether methylolmelamine coating composition, coating process and transparent product
Assignee: AGC Inc
•
Filing: 1981-04-01
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Granted: 1984-04-10
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Expires: 2001-04-01
Abstract
Abstract A coating composition comprises (A) an alkyl ether methylolmelamine in which a part or whole of methylol groups of methylolmelamine are converted into alkyl ether methylol groups; (B) a polyhydric alcohol having 2 or more hydroxyl groups; and (C) a dispersion of colloidal silica which can be condensed each other for the two or three components; and (D) a solvent.
Inventors
- 👤 Akinori Noda
- 👤 Seiichi Miyasaka
- 👤 Hiroshi Kawahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:49
CPC Classifications
C; C09; C09D; C09D161/00; C09D161/20; C09D161/32; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J2461/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31594; Y10T428/31598; Y10T428/31627; Y10T428/31855; Y10T428/31859; Y10T428/31935
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
76 words
A coating composition which comprises: (A) an alkyl ether methylolmelamine in which a part or whole of methylol groups of methylolmelamine are converted into alkyl ether methylol groups; (B) a polyhydric alcohol having 2 or more hydroxyl groups; and (C) a dispersion of colloidal silica having about 3 to 4 silanol groups per 100 square Angstroms and which can be condensed with one or more of the components (A), (B), or (C); and (D) a solvent.
Claim 2
Dependent Claim
76 words
A coating composition which comprises: (A) an alkyl ether methylolmelamine in which a part or whole of methylol groups of methylolmelamine are converted into alkyl ether methylol groups; (B) a polyhydric alcohol having 2 or more hydroxyl groups; and (C) a dispersion of colloidal silica having about 3 to 4 silanol groups per 100 square Angstroms and which can be condensed with one or more of the components (A), (B), or (C); and (D) a solvent.
Claim 3
Dependent Claim
24 words
The coating composition according to claim 1 wherein said dispersion of colloidal silica is a dispersion of a colloidal silica obtained from water glass.
Claim 4
Dependent Claim
20 words
The coating composition according to claim 1 wherein said dispersion of colloidal silica is a dispersion in an organic solvent.
Claim 5
Dependent Claim
23 words
The coating composition according to claim 1 wherein said colloidal silica has an average particle diameter ranging from about 20 to 500 Å.
Claim 6
Dependent Claim
21 words
The coating composition according to claim 1 wherein said polyhydric alcohol has a molecular weight ranging from about 60 to 5,000.
Claim 7
Dependent Claim
12 words
The coating composition according to claim 1 which further comprises a catalyst.
Claim 8
Dependent Claim
26 words
The coating composition according to claim 1 wherein the two or three components of (A), (B) and (C) are condensed in the presence of a catalyst.
Claim 9
Dependent Claim
22 words
The coating composition according to claim 1 wherein the three components of (A), (B) and (C) are condensed at the same time.
Claim 10
Dependent Claim
25 words
The coating composition according to claim 1 wherein said polyhydric alcohol is condensed with said colloidal silica and further said alkyl ether methylolmelamine is condensed.
Claim 11
Dependent Claim
26 words
The coating composition according to claim 1, 7 or 8 wherein a gram equivalent ratio of said alkyl ether methylolmelamine to said polyhydric alcohol is 1:0.5-2.
Claim 12
Dependent Claim
25 words
The coating composition according to claim 1, 7 or 8 wherein a ratio of said polyhydric alcohol to said colloidal silica is 1:0.1-4 by weight.
Claim 13
Dependent Claim
32 words
A process for producing a transparent hard coat on a substrate comprising forming on said substrate a layer of a coating composition of claim 1 followed by heat curing of said composition.
Claim 14
Dependent Claim
15 words
A transparent plastic product having a hard coated layer formed thereon according to claim 12.
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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) | 1987-04-10 | 1987-10-10 | 1988-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-10 | 1991-10-10 | 1992-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-10 | 1995-10-10 | 1996-04-10 | $7700.00 | Window Closed / Lapsed |