US4340716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating composition
Assignee: Adeka Corp
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Filing: 1981-06-22
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Granted: 1982-07-20
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Expires: 2001-06-22
Abstract
Abstract A coating composition containing as essential components (A) a prepolymer of epoxy resin and polyhydroxy phenolic compound selected from the group consisting of: (i) poly-nuclear polyhydroxy phenols having adjacent hydroxy groups, (ii) polyol esters of polyhydroxy phenolic carboxylic acids having adjacent hydroxy groups, (iii) a mixture thereof, and (B) an organic hardener for epoxy resins. This coating composition can be coated on rusty metal surfaces.
Inventors
- 👤 Naoaki Hata
- 👤 Hidehiko Kojo
- 👤 Koji Akimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:09
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/066; C08G59/08; C09; C09D; C09D163/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
59 words
A coating composition containing, as essential components, (A) a prepolymer of epoxy resin and polyhydroxy phenolic compound selected from the group consisting of (i) polynuclear polyhydroxy phenols having adjacent hydroxy groups, (ii) polyol esters of polyhydroxy phenolic carboxylic acids having adjacent hydroxy groups, and (iii) mixtures of (i) and (ii); and (B) an organic hardener for said epoxy resin.
Claim 2
Dependent Claim
59 words
A coating composition containing, as essential components, (A) a prepolymer of epoxy resin and polyhydroxy phenolic compound selected from the group consisting of (i) polynuclear polyhydroxy phenols having adjacent hydroxy groups, (ii) polyol esters of polyhydroxy phenolic carboxylic acids having adjacent hydroxy groups, and (iii) mixtures of (i) and (ii); and (B) an organic hardener for said epoxy resin.
Claim 3
Dependent Claim
35 words
A coating composition as claimed in claim 1, wherein said polynuclear polyhydroxy phenol having adjacent hydroxy groups is a condensation product of formaldehyde and polyhydroxy phenol having at least one pair of adjacent hydroxy groups.
Claim 4
Dependent Claim
16 words
A coating composition as claimed in claim 1, wherein said polyol esters are aliphatic polyol esters.
Claim 5
Dependent Claim
35 words
A coating composition as claimed in claim 1, wherein said prepolymer is obtained by reacting said epoxy resin and said polyhydroxy phenolic compound at a temperature in the range of 100° C. to 200° C.
Claim 6
Dependent Claim
44 words
A coating composition as claimed in claim 4, wherein said epoxy resin is reacted with said polyhydroxy phenolic compound in the presence of a solvent and a catalyst selected from the group consisting of tertiary amines, ammonium salts, phosphonium salts, and amine hydrochloride salts.
Claim 7
Dependent Claim
53 words
A coating composition as claimed in claim 2, wherein said polyhydroxy phenol is selected from the group consisting of catechol, catechol-3-carboxylic acid or ester thereof, catechol-4-carboxylic acid or ester thereof, pyrogallol, pyrogallol-4,6-dicarboxylic acid or ester thereof, pyrogallol-4-carboxylic acid or ester thereof, gallic acid or ester thereof, tannic acid or ester thereof, and urushiol.
Claim 8
Dependent Claim
80 words
A coating composition as claimed in claim 3, wherein said polyol ester of polyhydroxy phenolic carboxylic acid is formed by reacting an aliphatic polyol selected from the group consisting of ethylene glycol, propylene glycol, butylene glycol, 1,6-hexanediol, diethylene glycol, dipropylene glycol, triethylene glycol, tripropylene glycol, glycerin, trimethylol propane, pentaerythritol, sorbitol and glucose with a polyhydroxy phenolic carboxylic acid selected from the group consisting of catechol-3-carboxylic acid, catechol-4-carboxylic acid, gallic acid, m-galloyl gallic acid, pyrogallol-4-carboxylic acid, pyrogallol-4,6-dicarboxylic acid and tannic acid.
Claim 9
Dependent Claim
30 words
A coating composition as claimed in claim 1 in which the molar ratio of said epoxy resin to said polyhydroxy phenolic compound is in the range of 1/0.05 to 1/0.1.
References Cited (Backward Citations)
US2167073A
Cited
US4130549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-19 | 1986-01-18 | 1986-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-19 | 1990-01-18 | 1990-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-19 | 1994-01-18 | 1994-07-20 | $7700.00 | Window Closed / Lapsed |