Patent US6613840B2 successfully refreshed from Google Patents.
US6613840B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin composition for powder coating, powder coating, and coated article therewith
Assignee: DIC Corp
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Filing: 2001-12-13
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Granted: 2003-09-02
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Expires: 2021-12-13
Abstract
Abstract A resin composition for a powder coating, which comprises a non-crystalline polyester resin (A) having a carboxyl group, a crystalline polyester polyurethane resin (B) and a curing agent (C) made of a compound having a functional group reactable with the carboxyl group as an essential component, yields a powder coating which is highly suitable for practical use, the powder coating having superior storage stability (blocking resistance) and forming a coating film having superior smoothness under low temperature curing conditions.
Inventors
- 👤 Hiroyuki Itou
- 👤 Tetsuro Agawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:08
CPC Classifications
C; C09; C09D; C09D167/00; Y; Y10; Y10S; Y10S525/00; Y10S525/934; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31551
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
44 words
A resin composition for powder coating, comprising a non-crystalline polyester resin (A) having a carboxyl group, a crystalline polyester polyurethane resin (B), and a curing agent (C) made of a compound having a functional group reactable with the carboxyl group as an essential component.
Claim 2
Dependent Claim
44 words
A resin composition for powder coating, comprising a non-crystalline polyester resin (A) having a carboxyl group, a crystalline polyester polyurethane resin (B), and a curing agent (C) made of a compound having a functional group reactable with the carboxyl group as an essential component.
Claim 3
Dependent Claim
33 words
A resin composition for powder coating according to claim 1 , wherein isophthalic acid accounts for at least 50 mol % of a polyhydric carboxylic acid unit constituting the non-crystalline polyester resin (A).
Claim 4
Dependent Claim
27 words
A resin composition for powder coating according to claim 1 , the crystalline polyester polyurethane resin (B) having a crystallization peak temperature of 30 to 150° C.
Claim 5
Dependent Claim
30 words
A resin composition for powder coating according to claim 1 , wherein a melt viscosity at 180° C. of the crystalline polyester polyurethane resin (B) is 10 Pa·s or less.
Claim 6
Dependent Claim
40 words
A resin composition for powder coating according to claim 1 , wherein the polyhydric carboxylic acid unit constituting the crystalline polyester polyurethane resin (B) is a straight-chain aliphatic dicarboxylic acid having an even number from 2 to 22 carbon atoms.
Claim 7
Dependent Claim
39 words
A resin composition for powder coating according to claim 1 , wherein the polyhydric carboxylic acid unit constituting the crystalline polyester polyurethane resin (B) is a straight-chain aliphatic diol having an even number from 2 to 20 carbon atoms.
Claim 8
Dependent Claim
22 words
A resin composition for powder coating according to claim 1 , wherein the crystalline polyester polyurethane resin (B) has a carboxyl group.
Claim 9
Dependent Claim
26 words
A resin composition for powder coating according to claim 7 , wherein the crystalline polyester polyurethane resin (B) has an acid value of 10 to 200.
Claim 10
Dependent Claim
43 words
A resin composition for powder coating according to claim 1 , wherein the compound having a group reactable with a carboxyl group is at least one compound selected from the group consisting of β-hydroxyalkylamide, triglycidyl isocyanurate, epoxy group-containing acrylic resin and epoxy resin.
Claim 11
Dependent Claim
17 words
A powder coating comprising the resin composition for powder coating of claim 1 and a surface modifier.
Claim 12
Dependent Claim
22 words
A coated article obtained by coating a substrate with the powder coating of claim 10 and curing the coating film by heating.
References Cited (Backward Citations)
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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) | 2006-09-01 | 2007-03-03 | 2007-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-09-01 | 2011-03-03 | 2011-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-09-01 | 2015-03-03 | 2015-09-02 | $7700.00 | Window Closed / Lapsed |