US4075261A
Expired / Lapsed
US
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Powder coating composition
Assignee: Toyobo Co Ltd
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Filing: 1975-05-22
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Granted: 1978-02-21
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Expires: 1995-05-22
Abstract
Abstract A powder coating composition comprising 1. an unsaturated polyester which is prepared by reacting A. terephthalic acid or its lower alkyl ester, and B. an α-olefinic dicarboxylic acid, and C. optionally an organic acid having at least three carboxy groups in the molecule or its functional derivative, and D. an aliphatic or alicyclic glycol; and 2. an organic peroxide and a molecular terminal cross linking or bridging agent, said powder coating composition being able to form a film having excellent properties, such as excellent gloss, hardness, impact strength, heat resistance, weatherability and corrosion resistance.
Inventors
- 👤 Kanji Fujiyoshi
- 👤 Yutaka Mizumura
- 👤 Junji Sono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:31
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08K5/16; C08K5/34; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/08; C08L67/00; C08L67/06; C09; C09D; C09D167/00; C09D167/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
A powder coating composition comprising 1. a terephthalic acid-based unsaturated polyester which is prepared by reacting a. terephthalic acid or its lower alkyl ester, and b. an α-olefinic dicarboxylic acid or its anhydride, and c. optionally, an organic acid having at least three carboxy groups in the molecule or its anhydride, and d. an aliphatic or alicyclic glycol; and 2. an organic peroxide and an alkoxylatedpolyamino aldehyde resin.
Claim 2
Dependent Claim
68 words
A powder coating composition comprising 1. a terephthalic acid-based unsaturated polyester which is prepared by reacting a. terephthalic acid or its lower alkyl ester, and b. an α-olefinic dicarboxylic acid or its anhydride, and c. optionally, an organic acid having at least three carboxy groups in the molecule or its anhydride, and d. an aliphatic or alicyclic glycol; and 2. an organic peroxide and an alkoxylatedpolyamino aldehyde resin.
Claim 3
Dependent Claim
52 words
The powder coating composition according to claim 1, wherein the organic peroxide is contained in a range of 0.1 and 3 parts by weight and the alkoxylatedpolyamino aldehyde resin is contained in a range of 1 to 7 parts by weight of the basis of 100 parts by weight of the polyester.
Claim 4
Dependent Claim
25 words
The powder coating composition according to claim 1, wherein the unsaturated polyester (1 ) is prepared by reacting four components (a), (b), (c) and (d).
Claim 5
Dependent Claim
23 words
The powder coating composition according to claim 1, wherein the unsaturated polyester (1) is prepared by reacting three components (a), (b) and (d).
Claim 6
Dependent Claim
51 words
The powder coating composition according to claim 1, wherein the alkoxylated-polyaminoaldehyde resin is a member selected from the group consisting of hexamethoxymethylmelamine, pentamethoxymethyl-monomethyl melamine, a two molar condensate thereof having medium methoxylation degree of the methylol group of 4.0 to 5.5, and a mixture of methyl and ethyl etherate of tetramethylolbenzoguanamine.
Claim 7
Dependent Claim
95 words
The powder coating composition according to claim 1, wherein the α-olefinic dicarboxylic component (b) is a member selected from the group consisting of maleic acid, maleic anhydride, fumaric acid, citraconic acid, measconic acid and itaconic acid; the organic acid component (c) is a member selected from the group consisting of trimellitic acid, trimellitic anhydride, pyromellitic acid, pyromellitic dianhydride, propane-1,2,3-tricarboxylic acid and butane-1, 2,3,4-tetracarboxylic acid; and the aliphatic or alicyclic glycol component (d) is a member selected from the group consisting of ethyleneglycol, propyleneglycol, trimethyleneglycol, butanediol, pentanediol, hexanediol, diethyleneglycol, dipropyleneglycol, triethyleneglycol, neopentylglycol, cyclopentanediol, cyclohexanediol, and cyclohexanedimethanol.
Claim 8
Dependent Claim
43 words
The powder coating composition according to claim 1, wherein the organic peroxide is a member selected from the group consisting of dicumyl peroxide, di-tertiary butyl peroxide, tertiary butyl cumyl peroxide, cumene hydroperoxide, paramethane hydroperoxide, tertiary butyl propoxyacetate, tertiary butyl propoxyaurate and benzoyl peroxide.
References Cited (Backward Citations)
US3607975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |