US3988288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder paint
Assignee: Kawakami Paint Manufacturing Co Ltd
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Filing: 1974-08-21
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Granted: 1976-10-26
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Expires: 1994-08-21
Abstract
Abstract The powder paint of the present invention comprises an amino polyester resin and an epoxy compound as essential components and can preferably contain other resins or other compounds, pigments, additives, etc. Said powder paint, when applied to substrate by powder coating methods, provides a tough thermosetting film by means of crosslinking of amino groups of the amino-group-containing polyester resin with epoxy groups of the epoxy compound by baking. The obtained film has excellent weather resistance, corrosion resistance, mechanical properties and chemical resistance.
Inventors
- 👤 Kazuhiko Yamauchi
- 👤 Minoru Murakami
- 👤 Hisashi Nakano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:36
CPC Classifications
C; C09; C09D; C09D167/00; C09D163/00; Y; Y10; Y10S; Y10S524/00; Y10S524/904; Y10S525/00; Y10S525/934
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
120 words
A powder paint comprising: a. an aminopolyester resin having a softening point of from about 50° C to about 200° C and being the elevated temperature reaction product of: i. a polyester resin comprising a reaction product of at least one dihydric, trihydric or tetrahydric alcohol and at least one acid, greater than 50 mol % of said acid component consisting of at least one member selected from the group consisting of terephthalic acid, isophthalic acid and the lower alkyl esters thereof; and ii. from 0.2 to 15% by weight of said polyester, of an amino compound; and b. a polyepoxide compound, wherein the weight ratio of the aminopolyester resin to the polyepoxide is from about 99:1 to about 1:1.
Claim 2
Dependent Claim
120 words
A powder paint comprising: a. an aminopolyester resin having a softening point of from about 50° C to about 200° C and being the elevated temperature reaction product of: i. a polyester resin comprising a reaction product of at least one dihydric, trihydric or tetrahydric alcohol and at least one acid, greater than 50 mol % of said acid component consisting of at least one member selected from the group consisting of terephthalic acid, isophthalic acid and the lower alkyl esters thereof; and ii. from 0.2 to 15% by weight of said polyester, of an amino compound; and b. a polyepoxide compound, wherein the weight ratio of the aminopolyester resin to the polyepoxide is from about 99:1 to about 1:1.
Claim 3
Dependent Claim
49 words
A powder paint according to claim 1 wherein the elevated reaction product of the polyester resin and amino compound is one obtained by heating said polyester resin and said amino compound at a temperature of about 130° to about 250° C for from about 10 to about 60 minutes.
Claim 4
Dependent Claim
37 words
A powder paint according to claim 1 wherein said alcohol is dihydric and selected from the group consisting of ethyleneglycol, propyleneglycol, butyleneglycol, neopentylglycol, diethyleneglycol, dipropyleneglycol, pentanediol, hexanediol, heptanediol and [4,4'-iso-propyliene dicyclohexanol (hydrogenated bisphenol A)] 2,2-bis-(4-hydroxy cyclohexyl) propane.
Claim 5
Dependent Claim
24 words
A powder paint according to claim 1 wherein said alcohol is trihydric and selected from the group consisting of glycerol, trimethylolethane, trimethylolpropane and tris-2-hydroxyethylisocyanurate.
Claim 6
Dependent Claim
12 words
A powder paint according to claim 1 wherein said alcohol is pentaerithritol.
Claim 7
Dependent Claim
26 words
A powder paint according to claim 1 wherein said amine is selected from the group consisting of ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, phenylenediamine, xylenediamine, diaminodiphenylmethane and diaminodiphenylsulfone.
Claim 8
Dependent Claim
28 words
A powder paint according to claim 1 wherein said amine includes at least one member selected from the group consisting of urea, dicyandiamide, melamine, benzoguanamine, and aceto guanamine.
Claim 9
Dependent Claim
46 words
A powder paint according to claim 1 wherein said polyester resin is the transesterification product of polyethylene telephthalate or polyethylene isophthalate and an alcohol selected from the group consisting of ethyleneglycol, propyleneglycol, butyleneglycol, neopenthylglycol, diethyleneglycol, dipropyleneglycol, pentanediol, hexanediol, heptanediol, 2,2-bis(4-hydroxycyclohexyl)-propane, glycerol, trimethylolethane, trimethylolpropane, tris-2-hydroxyethylisocyanurate, and pentaerithritol.
Claim 10
Dependent Claim
37 words
A powder paint according to claim 1 including as a further component at least one solid resin selected from the group consisting of blocked polyisocyanate compounds, amino resins, phenol resins, xylene resins, acrylic resins, and silicone resins.
Claim 11
Dependent Claim
32 words
A powder paint according to claim 1 including as a further component at least one additive selected from the group consisting of wetting agents, leveling agents, flow control agents and anti-foam agents.
Claim 12
Dependent Claim
28 words
A powder paint according to claim 1 wherein a pigment is present in an amount of no more than 100 parts per hundred by weight of amino polyester.
Claim 13
Dependent Claim
62 words
A powder paint according to claim 1, wherein said acid component also contains at least one member selected from the group consisting of phthalic anhydride, lower alkyl esters of phthalic acid, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, hymic anhydride, methylhymic anhydride; aliphatic dicarboxylic acids; Diels-Alder adducts; fatty acids; fatty acid dimers; benzoic acid, p-tert-butylbenzoic acid, dimethylolpropionic acid, tris-2-carboxyethyl isocyanurate, abietic acid and hydrogenated rosin.
Claim 14
Dependent Claim
42 words
A powder paint according to claim 12 wherein the acid component of said polyester includes at least one acid selected from the group consisting of coconut oil fatty acid, soybean oil fatty acid, safflower oil fatty acid and drying oil fatty acid.
Claim 15
Dependent Claim
30 words
A powder paint according to claim 1 wherein said polyepoxide compound is selected from the group consisting of epoxides of 2,2-bis-(4-hydroxyphenyl)-propane, epoxides of 2,2-bis-(4-hydroxycyclohexyl)-propane, epoxides of 1,1,2,2-tetrakis-(4-hydroxyphenyl)-ethane and diglycidyl esters.
Claim 16
Dependent Claim
18 words
A powder paint according to claim 14 wherein said polyepoxide compound is the condensate of 2,2-bis-(4-hydroxycyclohexyl)-propane and epichlorohydrin.
Claim 17
Dependent Claim
22 words
A powder paint according to claim 14 wherein said polyepoxide is a diglycidylester based epoxy resin derived from phthalic anhydride and epichlorohydrin.
Claim 18
Dependent Claim
12 words
A powder paint according to claim 14 wherein said polyepoxide is triglycidylisocyanurate.
Claim 19
Dependent Claim
18 words
A powder paint according to claim 14 wherein said polyepoxide compound is the condensate of 2,2-bis-(4-hydroxyphenyl)-propane and epichlorohydrin.
Claim 20
Dependent Claim
18 words
A powder paint according to claim 14 wherein said polyepoxide compound is the condensate of 2,2-bis-(4-hydroxyphenyl)-propane and β-methylepichlorohydrin.
Claim 21
Dependent Claim
18 words
A powder paint according to claim 14 wherein said polyepoxide compound is the condensate of 1,1,2,2,-tetrakis-(4-hydroxyphenyl)-ethane and epichlorohydrin.
Claim 22
Dependent Claim
140 words
Process for the production of a powder paint which comprises: 1. mixing: a. an aminopolyester resin having a softening point of from about 50° C to about 200° C and being the elevated temperature reaction product of: i. a polyester ester resin comprising a reaction product of at least one dihydric, trihydric or tetrahydric alcohol and at least one acid, greater than 50 mol % of said acid component consisting of at least one member selected from the group consisting of terephthalic acid, isophthalic acid and the lower alkyl esters thereof; and ii. from 0.2 to 15%, by weight of said polyester, of an amino compound; and b. a polyepoxide compound, in the weight ratio of the aminopolyester resin to the polyepoxide is from about 99:1 to about 1:1; 2. blending the mixture; and 3. comminuting the solid blended mixture.
Claim 23
Dependent Claim
140 words
Process for the production of a powder paint which comprises: 1. mixing: a. an aminopolyester resin having a softening point of from about 50° C to about 200° C and being the elevated temperature reaction product of: i. a polyester ester resin comprising a reaction product of at least one dihydric, trihydric or tetrahydric alcohol and at least one acid, greater than 50 mol % of said acid component consisting of at least one member selected from the group consisting of terephthalic acid, isophthalic acid and the lower alkyl esters thereof; and ii. from 0.2 to 15%, by weight of said polyester, of an amino compound; and b. a polyepoxide compound, in the weight ratio of the aminopolyester resin to the polyepoxide is from about 99:1 to about 1:1; 2. blending the mixture; and 3. comminuting the solid blended mixture.
Claim 24
Dependent Claim
43 words
The process according to claim 21 wherein said aminopolyester resin and said polyepoxide are mixed with at least one member selected from the group consisting of blocked polyisocyanate compounds, amino resins, silicone resins, wetting agents, leveling agents, flow control agents and anti-foam agents.
Claim 25
Dependent Claim
22 words
The process according to claim 21 wherein said mixture is blended at melt at a temperature of 80° C to 130° C.
Claim 26
Dependent Claim
15 words
The process according to claim 21 wherein said mixture is mechanically blended at ambient temperatures.
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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) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |