US4888244A
Expired / Lapsed
US
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Process for forming composite coated film
Assignee: Kansai Paint Co Ltd
•
Filing: 1986-09-10
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Granted: 1989-12-19
•
Expires: 2006-09-10
Abstract
Abstract A process for forming a composite coated film, which comprises coating a cationically electrodepositing paint composed mainly of a cationic resin having a functional group capable of reacting with isocyanate groups on the surface of a substrate, then coating an organic solvent-base paint containing a polyisocyanate compound and capable of forming a coated film having a static glass transition temperature of 0° to -75° C. on the surface of the electrodeposited paint film, and then coating a top coat paint.
Inventors
- 👤 Yoichi Masubuchi
- 👤 Tadashi Watanabe
- 👤 Akira Tominaga
- 👤 Haruo Nagaoka
- 👤 Eisaku Nakatani
- 👤 Masafumi Kume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:49
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/50; B05D7/56; B05D1/00; B05D1/007; B05D2202/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
128 words
A process for forming a composite coated film, which comprises coating a cationically electrodepositing paint film on the surface of a substrate, said electrodepositing paint being composed mainly of a cationic resin having a functional group capable of reacting with isocyanate groups and substantially free from a crosslinking agent, then coating an organic solvent-base paint containing a polyisocyanate compound having per molecule at least two isocyanate groups which is partly or fully blocked with a blocking agent capable of being dissociated at a temperature of not more than 130° C., said solvent-based paint being capable of forming a coated film having a static glass transition temperature of 0° to -75° C. on the surface of the coated electrodepositing paint film, and then coating a top coat paint thereupon.
Claim 2
Dependent Claim
128 words
A process for forming a composite coated film, which comprises coating a cationically electrodepositing paint film on the surface of a substrate, said electrodepositing paint being composed mainly of a cationic resin having a functional group capable of reacting with isocyanate groups and substantially free from a crosslinking agent, then coating an organic solvent-base paint containing a polyisocyanate compound having per molecule at least two isocyanate groups which is partly or fully blocked with a blocking agent capable of being dissociated at a temperature of not more than 130° C., said solvent-based paint being capable of forming a coated film having a static glass transition temperature of 0° to -75° C. on the surface of the coated electrodepositing paint film, and then coating a top coat paint thereupon.
Claim 3
Dependent Claim
33 words
The process of claim 1 wherein the functional group capable of reacting with isocyanate groups is selected from the group consisting of a hydroxyl group, a primary amino group and an imino group.
Claim 4
Dependent Claim
30 words
The process of claim 1 wherein the amount of the functional group capable of reacting with isocyanate groups is 1 to 20 equivalents per 1,000 g of the cationic resin.
Claim 5
Dependent Claim
22 words
The process of claim 1 wherein the cationic resin is a resin obtained by reacting an epoxy resin with a cationizing agent.
Claim 6
Dependent Claim
19 words
The process of claim 4 wherein the epoxy resin is obtained by reacting bis(4-hydroxyphenyl)-2,2-propane or phenol novolak with epichlorohydrin.
Claim 7
Dependent Claim
14 words
The process of claim 4 wherein the cationizing agent is a basic amino compound.
Claim 8
Dependent Claim
25 words
The process of claim 6 wherein the basic amino compound is selected from the group consisting of lower alkanolamines, di-lower alkanolamines and N-lower alkyl-lower alkanolamines.
Claim 9
Dependent Claim
22 words
The process of claim 1 wherein the cationic resin has a stationary glass transition temperature of about 50° to about 130° C.
Claim 10
Dependent Claim
19 words
The process of claim 1 wherein the cationic resin has a number average molecular weight of 3,000 to 30,000.
Claim 11
Dependent Claim
25 words
The process of claim 1 wherein the cationic resin contains cationized groups in an amount corresponding to a base value of about 3 to 30.
Claim 12
Dependent Claim
46 words
The process of claim 1 wherein the polyisocyanate compound is selected from the group consisting of a reaction product of hexamethylene diisocyanate and water, an adduct of xylylene diisocyanate and trimethylolpropane, an adduct of tolylene diisocyanate and hexamethylene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate and lysine diisocyanate.
Claim 13
Dependent Claim
26 words
The process of claim 1 wherein a coated film formed from the organic solvent-base paint has a stationary glass transition temperature of -25° to -60° C.
Claim 14
Dependent Claim
51 words
The process of claim 1 wherein the organic solvent-base paint contains a vehicle component selected from the group consisting of a vinyl acetate/ethylene copolymer, a linear saturated polyester resin, a thermoplastic polyurethane elastomer, a polybutadiene-containing crosslinkable resin composition, a thermosetting polyester resin composition, a modified polyolefin resin and an acrylic resin.
Claim 15
Dependent Claim
14 words
The process of claim 1 wherein the organic solvent-base paint contains an anticorrosive paint.
Claim 16
Dependent Claim
39 words
The process of claim 1 wherein a coated film prepared from the organic solvent-base paint has a tensile break elongation, measured at a pulling speed of 20 mm/min. in an atmosphere kept at +20° C., of 200 to 1,000%.
Claim 17
Dependent Claim
23 words
The process of claim 1 wherein a coated film prepared from the organic solvent-base paint has a thickness of 1 to 20 microns.
Claim 18
Dependent Claim
35 words
The process of claim 1 wherein an intermediate coating paint is applied to the coated film obtained from the organic solvent-base paint and then the top coat is painted on the intermediate coated paint film.
Claim 19
Dependent Claim
63 words
The process of claim 17 wherein the intermediate coating paint is a thermosetting intermediate coating paint of the organic solvent type or aqueous type containing as a main vehicle component, a combination of (1) a short oil or ultrashort oil alkyd resin having an oil length of 30% or less or an oil-free polyester resin or mixture thereof and (2) an amino resin.
Claim 20
Dependent Claim
25 words
The process of claim 17 wherein a film formed from the intermediate coating paint has a pencil hardness of 3B to 6H at 20° C.
Claim 21
Dependent Claim
24 words
The process of claim 17 wherein a film formed from the intermediate coating paint has a thickness of 10 to 50 microns after curing.
Claim 22
Dependent Claim
25 words
The process of claim 1 wherein the top coat paint is a top coat paint of the amino-acrylic resin type or the amino-alkyd resin type.
Claim 23
Dependent Claim
23 words
The process of claim 1 wherein the composite coated film has a pencil hardness of 2H to 9H at 20° C. after curing.
Claim 24
Dependent Claim
11 words
A metallic substrate coated according to the process of claim 1.
References Cited (Backward Citations)
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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) | 1992-12-18 | 1993-06-19 | 1993-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-18 | 1997-06-19 | 1997-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-18 | 2001-06-19 | 2001-12-19 | $7700.00 | Window Closed / Lapsed |