US4151220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder coating composition
Assignee: Maruzen Petrochemical Co Ltd
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Filing: 1977-02-17
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Granted: 1979-04-24
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Expires: 1997-02-17
Abstract
Abstract A powder coating composition containing a vehicle which comprises about 50 to about 98% by weight of a polycondensate obtained by a polycondensation of a polyol component comprising at least about 30 mol% 2-methylbutane-1,3-diol and a polycarboxylic acid component comprising at least about 50 mol% terephthalic acid and/or dimethyl terephthalate and about 2 to about 50% by weight of a crosslinking agent. The powder coating composition has a good storage stability (or powder stability) and also the boiling water resistance, the smoothness, the gloss, the flexibility, the adhesiveness, etc., in particular of a film thereof is quite excellent.
Inventors
- 👤 Yoshihide Watanabe
- 👤 Keiji Kitada
- 👤 Osamu Kuratani
- 👤 Makoto Iriuchijima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:15
CPC Classifications
C; C09; C09D; C09D167/00; C09D167/02; Y; Y10; Y10S; Y10S524/00; Y10S524/904
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
93 words
A powder coating composition which contains a vehicle comprising (a) about 50 to about 98% by weight of a polycondensate having a softening point of about 80° to about 150° C. obtained from (i) a polyol component comprising at least about 30 mole % of 2-methylbutane-1,3-diol, and (ii) a polycarboxylic acid component comprising at least about 50 mole % of terephthalic acid and/or dimethyl terephthalate, and (b) about 2 to about 50% by weight of a crosslinking agent selected from the group consisting of an amino resin, a blocked polyisocyanate or mixtures thereof.
Claim 2
Dependent Claim
93 words
A powder coating composition which contains a vehicle comprising (a) about 50 to about 98% by weight of a polycondensate having a softening point of about 80° to about 150° C. obtained from (i) a polyol component comprising at least about 30 mole % of 2-methylbutane-1,3-diol, and (ii) a polycarboxylic acid component comprising at least about 50 mole % of terephthalic acid and/or dimethyl terephthalate, and (b) about 2 to about 50% by weight of a crosslinking agent selected from the group consisting of an amino resin, a blocked polyisocyanate or mixtures thereof.
Claim 3
Dependent Claim
38 words
The powder coating composition as claimed in claim 1, wherein the amount of said polycondensate is about 60 to about 96% by weight and the amount of said crosslinking agent is about 4 to about 40% by weight.
Claim 4
Dependent Claim
26 words
The powder coating composition as claimed in claim 1, wherein said polyol component is 2-methylbutane-1,3-diol, and said polycarboxylic acid component is terephthalic acid and/or dimethyl terephthalate.
Claim 5
Dependent Claim
30 words
The powder coating composition as claimed in claim 3, wherein the molar ratio of the 2-methylbutane-1,3-diol to the terephthalic acid and/or dimethyl terephthalate in the polycondensate is 0.8:1.0 to 1.5:1.0.
Claim 6
Dependent Claim
17 words
The powder coating composition as claimed in claim 4, wherein said molar ratio is 0.9:1.0 to 1.2:1.0.
Claim 7
Dependent Claim
23 words
The powder coating composition as claimed in claim 1, wherein said polycondensate has a molecular weight ranging from about 1,000 to about 10,000.
Claim 8
Dependent Claim
22 words
The powder coating composition as claimed in claim 1, wherein said polycondensate has an acid value of about 200 (mg.KOH/g) or less.
Claim 9
Dependent Claim
17 words
The powder coating composition as claimed in claim 1, wherein said crosslinking agent is an amino resin.
Claim 10
Dependent Claim
32 words
The powder coating composition as claimed in claim 8, wherein said amino resin is selected from the group consisting of a melamine-formaldehyde resin, a urea-formaldehyde resin, a benzoguanamine-formaldehyde resin and mixtures thereof.
Claim 11
Dependent Claim
16 words
The powder coating composition as claimed in claim 1, wherein said composition further contains a pigment.
Claim 12
Dependent Claim
32 words
The powder coating composition as claimed in claim 10, wherein the amount of said pigment ranges up to about 100 parts by weight based on 100 parts by weight of the vehicle.
Claim 13
Dependent Claim
26 words
The powder coating composition as claimed in claim 10, wherein a size of the particles of the powder coating composition is about 100 microns or less.
Claim 14
Dependent Claim
17 words
The powder coating composition as claimed in claim 1, wherein said composition further contains a flow agent.
Claim 15
Dependent Claim
33 words
The powder coating composition as claimed in claim 13, wherein the amount of said flow agent is about 1 part by weight or less based on 100 parts by weight of the vehicle.
Claim 16
Dependent Claim
26 words
The powder coating composition as claimed in claim 13, wherein the size of the particles of the powder coating composition is about 100 microns or less.
Claim 17
Dependent Claim
17 words
The powder coating composition as claimed in claim 13, wherein said composition further contains a cure accelerator.
Claim 18
Dependent Claim
33 words
The powder coating composition as claimed in claim 16, wherein the amount of said cure accelerator is about 10 parts by weight or less based on 100 parts by weight of the vehicle.
Claim 19
Dependent Claim
26 words
The powder coating composition as claimed in claim 16, wherein the size of the particles of the powder coating composition is about 100 microns or less.
Claim 20
Dependent Claim
36 words
The powder coating composition as claimed in claim 8, wherein said amino resin is a condensation product of an amino compound and formaldehyde or an alkoxide of a condensation product of an amino compound and formaldehyde.
Claim 21
Dependent Claim
24 words
The powder coating composition as claimed in claim 19, wherein said amino compound is selected from the group consisting of melamine, urea or benzoguanamine.
Claim 22
Dependent Claim
35 words
The powder coating composition as claimed in claim 19, wherein said alkoxide is a product of an aliphatic alcohol having 4 or less carbon atoms and said condensation product of an amine compound and formaldehyde.
Claim 23
Dependent Claim
14 words
The powder coating composition as claimed in claim 21, wherein said alkoxide is hexamethoxymethylmelamine.
Claim 24
Dependent Claim
17 words
The powder coating composition as claimed in claim 1, wherein said crosslinking agent is a blocked polyisocyanate.
Claim 25
Dependent Claim
43 words
The powder coating composition as claimed in claim 23, wherein said blocked polyisocyanate is obtained from a phenol, a caprolactam or an aliphatic alcohol and tolylene diisocyanate, isophorone diisocyanate or hexamethylene diisocyanate; or obtained from the condensation of a diisocyanate and trimethylol propane.
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) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |