US4769259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preventing fogging of surfaces
Assignee: NOGAWA CHEMICAL Co Ltd A CORP OF TOKYO
•
Filing: 1987-02-27
•
Granted: 1988-09-06
•
Expires: 2007-02-27
Abstract
Abstract The present invention relates to a method for preventing fogging or clouding of surfaces comprising glass, high molecular weight substance, and the like. The method comprises the steps of: (1) applying a dispersion liquid wherein a high molecular substance having a hydroxyl group is added to the surface to be treated (2) causing the substance on the surface to react while adding cyanuric chloride, (3) hydrolyzing the resultant mixture with a base, (4) neutralizing the treated surface, (5) rinsing and drying the above neutralized surface, (6) reacting a nonionic surface active agent having a fluorine group or a silicone group with a NH 2 group or H group to react on the surface, (7) hydrolyzing the resultant surface and then, (8) neutralizing the surface with an acid.
Inventors
- 👤 Minoru Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:01
CPC Classifications
B; B05; B05D; B05D3/00; B05D3/10; C; C03; C03C; C03C17/00; C03C17/28; C03C17/32
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
135 words
A method for preventing fogging of surfaces composed of glass or organic high molecular weight substances, which comprise the steps of (A) applying a dispersion liquid containing a cellulose which possesses an available hydroxyl group after a hydrolysis reaction, (B) reacting the resulting surface with cyanuric chloride, (C) hydrolyzing the reacted surface with a base, (D) neutralizing the alkali treated surface with an inorganic acid, (E) reacting said neutralized surface with a nonionic surface active agent having the formula: R.sub.f CH.sub.2 CH.sub.2 O(CH.sub.2 CH.sub.2 O).sub.x Y wherein Y is hydrogen or amino, R f is an alkyl group of 1 to 10 carbon atoms having a fluoro or silicone group, and x is 1 to 20, (F) hydrolyzing the reacted surface with a base, and then (G) neutralizing said hydrolyzed surface with an inorganic acid.
Claim 2
Independent Claim
135 words
A method for preventing fogging of surfaces composed of glass or organic high molecular weight substances, which comprise the steps of (A) applying a dispersion liquid containing a cellulose which possesses an available hydroxyl group after a hydrolysis reaction, (B) reacting the resulting surface with cyanuric chloride, (C) hydrolyzing the reacted surface with a base, (D) neutralizing the alkali treated surface with an inorganic acid, (E) reacting said neutralized surface with a nonionic surface active agent having the formula: R.sub.f CH.sub.2 CH.sub.2 O(CH.sub.2 CH.sub.2 O).sub.x Y wherein Y is hydrogen or amino, R f is an alkyl group of 1 to 10 carbon atoms having a fluoro or silicone group, and x is 1 to 20, (F) hydrolyzing the reacted surface with a base, and then (G) neutralizing said hydrolyzed surface with an inorganic acid.
Claim 3
Dependent Claim
10 words
The method of claim 1 wherein said surface is transparent.
Claim 4
Dependent Claim
10 words
The method of claim 1 wherein said polymer is cellulose.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein said dispersion liquid is a dioxane-water solution.
Claim 6
Dependent Claim
17 words
The method of claim 1 wherein said dispersion liquid is applied to said surface with an adhesive.
Claim 7
Dependent Claim
16 words
The method of claim 1 wherein the surface is washed and dried after the neutralizing step.
Claim 8
Dependent Claim
11 words
The method of claim 1 wherein said base is potassium hydroxide.
Claim 9
Dependent Claim
11 words
The method of claim 1 wherein said acid is hydrochloric acid.
Claim 10
Dependent Claim
19 words
The method of claim 1 wherein R f is a fluorinated alkyl group of 2 to 10 carbon atoms.
Claim 11
Dependent Claim
19 words
The method of claim 1 wherein R f is CF 3 , Y is hydrogen and x is 2.
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) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |