US3876587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder coating compositions
Assignee: KANASI PAINT CO Ltd
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Filing: 1973-10-23
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Granted: 1975-04-08
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Expires: 1993-10-23
Abstract
Abstract A thermosetting acrylic powder coating composition which comprises an acrylic resin having glycidyl groups in the molecule and a glass transition temperature of 40.degree. to 85.degree.C and at least one of aliphatic dibasic acids, anhydrides thereof and substances producing said dibasic acids under a curing condition; said acrylic resin being a copolymer of 1. 50 to 94.5 weight percent of at least one alkyl esters of acrylic acid or methacrylic acid, 2. 0.5 to 10 weight percent of at least one of hydroxyalkyl esters of acrylic acid or methacrylic acid and 3. 5 to 40 weight percent of at least one of glycidyl acrylate and glycidyl methacrylate; and said aliphatic dibasic acid having the formula of in which R is a saturated aliphatic hydrocarbon group having 4 to 11 carbon atoms.
Inventors
- 👤 Komaharu Matsui
- 👤 Masaaki Kamimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:12
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/068
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
112 words
A THERMOSETTING ACRYLIC POWDER COATING COMPOSITION WHICH COMPRISES AN ACRYLIC RESIN HAVING GLYCIDYL GROUPS IN THE MOLECULE AND A GLASS TRANSITION TEMPERATURE OF 40* TO 85*C AND AT LEAST ONE OF ALIPHATIC DIBASIC ACIDS, ANHYDRIDES THEREOF AND SUBSTANTACES PRODUCING SAID DIBASIC ACIDS UNDER A CURING CONDITION IN AN AMOUNT OF 0.5 TO 2.0 EQUIVALENT IN TERMS OF THE CARBOXYLIC GROUP CONTAINED THEREIN PER ONE EQUIVALENT OF THE GLYCIDYL GROUP CONTAINED IN THE ACRYLIC RESIN; SAID ACRYLIC RESIN BEING A COPOLYMER OF 1. 50 TO 94.5 WEIGHT PERCENT OF AT LEAST ONE SPECIES SELECTED FROM THE GROUP CONSISTING OF (A) ALKYL ESTERS OF ACRYLIC ACID OR METHACRYLIC ACID REPRESENTED BY THE FORMULA OF
Claim 2
Dependent Claim
112 words
A THERMOSETTING ACRYLIC POWDER COATING COMPOSITION WHICH COMPRISES AN ACRYLIC RESIN HAVING GLYCIDYL GROUPS IN THE MOLECULE AND A GLASS TRANSITION TEMPERATURE OF 40* TO 85*C AND AT LEAST ONE OF ALIPHATIC DIBASIC ACIDS, ANHYDRIDES THEREOF AND SUBSTANTACES PRODUCING SAID DIBASIC ACIDS UNDER A CURING CONDITION IN AN AMOUNT OF 0.5 TO 2.0 EQUIVALENT IN TERMS OF THE CARBOXYLIC GROUP CONTAINED THEREIN PER ONE EQUIVALENT OF THE GLYCIDYL GROUP CONTAINED IN THE ACRYLIC RESIN; SAID ACRYLIC RESIN BEING A COPOLYMER OF 1. 50 TO 94.5 WEIGHT PERCENT OF AT LEAST ONE SPECIES SELECTED FROM THE GROUP CONSISTING OF (A) ALKYL ESTERS OF ACRYLIC ACID OR METHACRYLIC ACID REPRESENTED BY THE FORMULA OF
Claim 3
Dependent Claim
25 words
The thermosetting acrylic powder coating composition according to claim 1, in which said acrylic resin has a glass transition temperature of 45.degree. to 55.degree. C.
Claim 4
Dependent Claim
81 words
The thermosetting acrylic powder coating composition according to claim 1, in which said copolymer comprises 62 to 88 weight percent of at least one species selected from the group consisting of (a) said alkyl esters and (b) a 1 : up to 1.5 weight ratio mixture of said alkyl esters and other vinyl monomers, 2 to 8 weight percent of at least one of said hydroxyalkyl esters and 10 to 30 weight percent of at least one of said glycidyl esters.
Claim 5
Dependent Claim
51 words
The thermosetting acrylic powder coating composition according to claim 1, in which said copolymer comprises 50 to 94.5 weight percent of at least one of said alkyl esters, 0.5 to 10 weight percent of at least one of said hydroxyalkyl esters and 5 to 40 weight percent of said glycidyl esters.
Claim 6
Dependent Claim
60 words
The thermosetting acrylic powder coating composition according to claim 1, in which said copolymer comprises 50 to 94.5 weight percent of 1 : up to 1.5 weight ratio mixture of said alkyl esters and other vinyl monomers, 0.5 to 10 weight percent of at least one of said hydroxyalkyl esters and 5 to 40 weight percent of said glycidyl esters.
Claim 7
Dependent Claim
31 words
The thermosetting acrylic powder coating composition according to claim 5, in which said vinyl monomer is one member selected from the group consisting of styrene, acrylonitrile, vinyl acetate and vinyl toluene.
Claim 8
Dependent Claim
28 words
The thermosetting acrylic powder coating composition according to claim 5, in which said mixture ratio of said alkyl esters and vinyl monomer is 1 : up to 1.
Claim 9
Dependent Claim
45 words
The thermosetting acrylic powder coating composition according to claim 1, in which said aliphatic dibasic acid is one species selected from the group consisting of adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, dodecane dioic acid, glutaric acid, brassylic acid and malonic acid.
Claim 10
Dependent Claim
33 words
The thermosetting acrylic powder coating composition according to claim 1, in which said aliphatic dibasic acid anhydride is one species selected from the group consisting of adipic anhydride, azelaic anhydride and sebacic anhydride.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |