US4101518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin composition for powder coatings
Assignee: Kao Corp
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Filing: 1977-03-28
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Granted: 1978-07-18
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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) one mole of a polycarboxylic acid obtained by reacting (i) one mole of a polyoxyalkylene ether of a dihydric phenol, with (ii) 1 to 4 moles of trimellitic acid or anhydride thereof, (2) from 0.1 to 0.5 moles of a diepoxy compound.
Inventors
- 👤 Shigeru Takamori
- 👤 Kazutaka Yamashita
- 👤 Yoshinao Kono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:05
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/182; C08G59/186; C09; C09D; C09D163/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
150 words
A resin composition for powder coating compositions consisting essentially of (A) a polycarboxylic acid obtained by reacting (1) a polycarboxylic acid formed by reacting (i) a polyoxyalkylene ether of a dihydric phenol having the formula: ##STR3## wherein A is alkylene 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 (ii) trimellitic acid or trimellitic anhydride in an amount of 1 to 4 moles of said trimellitic acid or trimellitic anhydride per one mole of said polyoxyalkylene ether, with (2) a diepoxy compound in an amount of 0.1 to 0.5 mole of said diepoxy compound per one mole of said polycarboxylic acid (1) to effect a chain-extending reaction, and (B) a polyepoxy compound.
Claim 2
Dependent Claim
150 words
A resin composition for powder coating compositions consisting essentially of (A) a polycarboxylic acid obtained by reacting (1) a polycarboxylic acid formed by reacting (i) a polyoxyalkylene ether of a dihydric phenol having the formula: ##STR3## wherein A is alkylene 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 (ii) trimellitic acid or trimellitic anhydride in an amount of 1 to 4 moles of said trimellitic acid or trimellitic anhydride per one mole of said polyoxyalkylene ether, with (2) a diepoxy compound in an amount of 0.1 to 0.5 mole of said diepoxy compound per one mole of said polycarboxylic acid (1) to effect a chain-extending reaction, and (B) a polyepoxy compound.
Claim 3
Dependent Claim
56 words
A resin composition according to claim 1 wherein the polycarboxylic acid (A) and the polyepoxy compound (B) are mixed at such a mixing ratio that the number of carboxyl groups of the polycarboxylic acid (A) present in said composition is from 0.5 to 2.0 equivalents per 1.0 equivalent of epoxy groups of the polyepoxy compound (B).
Claim 4
Dependent Claim
11 words
A resin composition according to claim 1 wherein A is ##STR4##
Claim 5
Dependent Claim
18 words
A resin composition according to claim 1 wherein the diepoxy compound is a liquid diglycidyl ether of 2,2-di-(4-hydroxyphenyl)propane.
Claim 6
Dependent Claim
19 words
A resin composition according to claim 1 wherein the polyepoxy compound (B) is a solid diglycidyl ether of 2,2-di-(4-hydroxyphenyl)propane.
Claim 7
Dependent Claim
48 words
A resin composition according to claim 1 wherein the polyepoxy compound (B) is a member selected from the group consisting of triglycidyl isocyanurate, vinylcyclohexene dioxide, diglycidyl dimethylhydantoin, polyglycidyl ether of a phenol-novolak resin, diglycidyl ester of tetrahydrophthalic acid, diglycidyl ester of hexahydrophthalic acid and polyepoxy group-containing vinyl compound.
Claim 8
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 9
Dependent Claim
31 words
A resin composition according to claim 2 in which the number of carboxyl groups of (A) is from 0.8 to 1.2 equivalents per one equivalent of the epoxy groups of (B).
Claim 10
Dependent Claim
29 words
A resin composition according to claim 2 in which the number of carboxyl groups of (A) is about one equivalent per one equivalent of the epoxy groups of (B).
Claim 11
Dependent Claim
15 words
A powder paint composition comprising a pigment blended with the resin composition of claim 1.
Claim 12
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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |