Patent US2532858A successfully refreshed from Google Patents.
Patent US3953403A successfully refreshed from Google Patents.
US3953403A
Expired / Lapsed
US
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Powder coating composition
Assignee: Toyobo Co Ltd
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Filing: 1973-06-25
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Granted: 1976-04-27
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Expires: 1993-06-25
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 23:28
CPC Classifications
C; C09; C09D; C09D167/00; C09D167/06; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08L; C08L67/00; C08L67/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
68 words
A powdered composition comprising 1 a terephthalic acid-based unsaturated polyester which is prepared by reacting a terephthalic acid or its lower alkyl ester, b an α-olefinic dicarboxylic acid or its anhydride, c an organic acid having at least three carboxyl groups in the molecule or its anhydride, and d an aliphatic or alicyclic glycol; and 2an organic peroxide and a polyanhydride having at least two acid anhydride groups.
Claim 2
Dependent Claim
68 words
A powdered composition comprising 1 a terephthalic acid-based unsaturated polyester which is prepared by reacting a terephthalic acid or its lower alkyl ester, b an α-olefinic dicarboxylic acid or its anhydride, c an organic acid having at least three carboxyl groups in the molecule or its anhydride, and d an aliphatic or alicyclic glycol; and 2an organic peroxide and a polyanhydride having at least two acid anhydride groups.
Claim 3
Dependent Claim
49 words
The powdered composition according to claim 1, wherein the organic peroxide is contained in a range of 0.1 to 3 parts by weight and the polyanhydride is contained in a range of 1 to 7 parts by weight on the basis of 100 parts by weight of the polyester.
Claim 4
Dependent Claim
39 words
The powdered composition according to claim 1, wherein the molar ratio (a):(b):(c) is in the range of 50:40:10 to 94:5:1 and the molar ratio of glycol (d) to total acids (a)+(b)+(c) is in the range of 1.1 to 2.0.
Claim 5
Dependent Claim
58 words
The powdered composition according to claim 1, wherein the polyanhydride is a member selected from the group consisting of pyromellitic dianhydride, 2,3,6,7-nephthalenetetracarboxylic dianhydride, 3,3',4,4'-diphenyltetracarboxylic dianhydride, 2,2',3,3'-diphenyltetracarboxylic dianhydride, 1,2,5,6-naphthalenetetracarboxylic dianhydride, 2,2-bis(3,4-dicarboxyphenyl)propane dianhydride, 1,2,3,4-cyclopentanetetracarboxylic dianhydride, benzophenonetetracarboxylic dianhydride, bis(3,4-dicarboxyphenyl)ether dianhydride, 3,4,9,10-perylenetetracarboxylic dianhydride, ethylene bis(trimellitate) dianhydride, hydroquinone bis(trimellitate) dianhydride, bisphenol A bis(trimellitate) dianhydride, p.p'-phenylene bis(thiotrimellitate)dianhydride, glycerine tris(trimellitate) trianhydride and trimethylolethane trimellitate trianhydride.
Claim 6
Dependent Claim
94 words
The powdered composition according to claim 1, wherein the α-olefinic dicarboxylic acid component (b) is a member selected from the group consisting of maleic acid, maleic anhydride, fumaric acid, citraconic acid, mesaconic 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 anhydride, 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 7
Dependent Claim
42 words
The powdered 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, para-menthane hydroperoxide, tertiary butyl propoxyacetate, tertiary butyl propoxylaurate and benzoyl peroxide.
References Cited (Backward Citations)
US3108902A
Cited
US3390205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-27 | 1979-10-27 | 1980-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-27 | 1983-10-27 | 1984-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-27 | 1987-10-27 | 1988-04-27 | $7700.00 | Window Closed / Lapsed |