US4092295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resin composition containing polycarboxylic acid compound
Assignee: Kao Corp
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Filing: 1977-03-28
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Granted: 1978-05-30
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Expires: 1997-03-28
Abstract
Abstract A thermosetting resin composition useful in a powder coating composition comprising a polyepoxy compound and a polycarboxylic acid obtained by reacting 1 to 4 moles of trimellitic acid, or anhydride thereof, with a polyoxyalkylene ether of a dihydric phenol.
Inventors
- 👤 Shigeru Takamori
- 👤 Kazutaka Yamashita
- 👤 Yoshinao Kono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:17
CPC Classifications
C; C09; C09D; C09D163/00; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/331; C08G65/332; C08G65/3324; C08G65/3326; Y; Y10; Y10S; Y10S524/00; Y10S524/904; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31529
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
115 words
A resin composition for powder coating compositions consisting essentially of (A) polyepoxy compound containing an average of more than one oxirane group per molecule and (B) polycarboxylic acid obtained by reacting (1) polyoxyalkylene ether of a dihydric phenol having the formula: ##STR3## wherein A is alkylene group having 1 to 4 carbon atoms or carbonyl, R is alkylene having 2 to 4 carbon atoms, and each of m and n is a number of at least 1 and the sum of m and n is in the range of from 2 to 14, with (2) trimellitic acid or trimellitic anhydride, in an amount of 1 to 4 moles of (2) per one mole of (1).
Claim 2
Dependent Claim
115 words
A resin composition for powder coating compositions consisting essentially of (A) polyepoxy compound containing an average of more than one oxirane group per molecule and (B) polycarboxylic acid obtained by reacting (1) polyoxyalkylene ether of a dihydric phenol having the formula: ##STR3## wherein A is alkylene group having 1 to 4 carbon atoms or carbonyl, R is alkylene having 2 to 4 carbon atoms, and each of m and n is a number of at least 1 and the sum of m and n is in the range of from 2 to 14, with (2) trimellitic acid or trimellitic anhydride, in an amount of 1 to 4 moles of (2) per one mole of (1).
Claim 3
Dependent Claim
57 words
A resin composition according to claim 1 wherein said polycarboxylic acid (B) and said polyepoxy compound (A) are mixed at such a mixing ratio that the number of carboxyl groups of said polycarboxylic acid (B) present in said composition is from 0.5 to 2.0 equivalents per 1.0 equivalent of the epoxy groups of said polyepoxy compound (A).
Claim 4
Dependent Claim
17 words
A resin composition according to claim 1 wherein A is selected from the group consisting of ##STR4##
Claim 5
Dependent Claim
17 words
A resin composition according to claim 1 wherein the polyepoxy compound is a diglycidyl ether of 2,2-di(4-hydroxyphenyl)propane.
Claim 6
Dependent Claim
53 words
A resin composition according to claim 1 wherein the polyepoxy compound is a member selected from the group consisting of triglycidyl isocyanurate, vinyl cyclohexene dioxide, diglycidyl dimethylhydantoin, a polyglycidyl ether of a phenol-novolak resin, a diglycidyl ester of tetrahydrophthalic acid, a diglycidyl ester of hexahydrophthalic acid and a polyepoxy group containing vinyl compound.
Claim 7
Dependent Claim
20 words
A resin composition according to claim 1 prepared by melt-blending components (A) and (B) and then pulverizing the resulting mixture.
Claim 8
Dependent Claim
31 words
A resin composition according to claim 2 in which the number of carboxyl groups of (B) is from 0.8 to 1.2 equivalents per one equivalent of the epoxy groups of (A).
Claim 9
Dependent Claim
29 words
A resin composition according to claim 2 in which the number of carboxyl groups of (B) is about one equivalent per one equivalent of the epoxy groups of (A).
Claim 10
Dependent Claim
15 words
A powder paint composition comprising a pigment blended with the resin composition of claim 1.
Claim 11
Dependent Claim
34 words
A coated object prepared by coating the object with a powder paint composition as claimed in claim 9, followed by fusing the powder paint composition to form a coating film and curing the resin.
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) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |