US4720405A
Expired / Lapsed
US
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Method of providing a substrate with a flexible multilayer coating
Assignee: PPG Industries Inc
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Filing: 1986-12-24
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Granted: 1988-01-19
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Expires: 2006-12-24
Abstract
Abstract A coating composition contains an organic polyol, a polyepoxide, a polyisocyanate crosslinking agent, and a phenolic resin. The composition is flexible, having an elongation of at least 10 percent when cured. This coating composition is particularly suitable as a primer in preparing substrates with a multilayer coating having good flexibility.
Inventors
- 👤 Dennis W. Carson
- 👤 Robert J. Schmitt
- 👤 Carl A. Seneker
- 👤 Thomas A. Van Kuren
- 👤 David R. Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:58
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4028; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/4009; C08G18/4027; C08G18/4045; C09; C09D; C09D163/00; Y; Y10; Y10S; Y10S525/00; Y10S525/939; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522; Y10T428/3154; Y10T428/31544; Y10T428/31551; Y10T428/31573; Y10T428/31576; Y10T428/3158
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
117 words
A method of providing a substrate with a multilayer coating comprising: a. applying a flexible primer coating composition to a substrate, said primer coating composition comprising an organic polyol, a polyepoxide, a blocked polyisocyanate curing agent, and a phenolic resin and having an elongation of at least 10 percent when cured; b. applying a pigmented coating composition to the coated substrate of step (a), said pigmented coating composition comprising a fluorocarbon polymer; c. applying a clear coating composition to the coated substrate of step (b), said clear coating composition comprising a fluorocarbon polymer; and d. at least partially curing the coated substrate of step (c); said multilayer coating having an elongation of at least 10 percent cured.
Claim 2
Independent Claim
117 words
A method of providing a substrate with a multilayer coating comprising: a. applying a flexible primer coating composition to a substrate, said primer coating composition comprising an organic polyol, a polyepoxide, a blocked polyisocyanate curing agent, and a phenolic resin and having an elongation of at least 10 percent when cured; b. applying a pigmented coating composition to the coated substrate of step (a), said pigmented coating composition comprising a fluorocarbon polymer; c. applying a clear coating composition to the coated substrate of step (b), said clear coating composition comprising a fluorocarbon polymer; and d. at least partially curing the coated substrate of step (c); said multilayer coating having an elongation of at least 10 percent cured.
Claim 3
Dependent Claim
30 words
The method of claim 1 wherein the pigmented coating composition additionally comprises an adjuvant polymer different from the fluorocarbon polymer and adapted to modify the properties of the fluorocarbon polymer.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein the adjuvant polymer is an acrylic polymer.
Claim 5
Dependent Claim
40 words
The method of claim 3 wherein the pigmented coating composition comprises from about 45 percent to about 85 percent of the fluorocarbon polymer, from about 15 percent to about 55 percent of the acrylic polymer, on a resin solids basis.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein the clear coating composition additionally comprises an adjuvant polymer different from the fluorocarbon polymer.
Claim 7
Dependent Claim
13 words
The method of claim 5 wherein the adjuvant polymer is an acrylic polymer.
Claim 8
Dependent Claim
41 words
The method of claim 6 wherein the clear coating composition comprises from about 45 percent to about 85 percent of the fluorocarbon polymer, and from about 15 percent to about 55 percent of the acrylic polymer, on a resin solids basis.
Claim 9
Dependent Claim
61 words
The method of claim 1 wherein the dry film thickness of the primer coating composition ranges from about 0.2 mil to about 1.5 mils; the dry film thickness of the pigmented coating composition ranges from about 0.5 mil to about 1.5 mils; and the dry film thickness of the clear coating composition ranges from about 0.2 mil to about 1.0 mil.
Claim 10
Dependent Claim
41 words
The method of claim 4 wherein the pigmented coating composition comprises from about 65 percent to about 75 percent of the fluorocarbon polymer and from about 25 percent to about 35 percent of the acrylic polymer, on a resin solids basis.
Claim 11
Dependent Claim
41 words
The method of claim 7 wherein the clear coating composition comprises from about 65 percent to about 75 percent of the fluorocarbon polymer and from about 25 percent to about 35 percent of the acrylic polymer, on a resin solids basis.
Claim 12
Dependent Claim
19 words
The method of claim 1 wherein the acrylic polymer of steps (b) and (c) is a thermosetting acrylic polymer.
Claim 13
Dependent Claim
17 words
The method of claim 1 wherein the fluorocarbon polymer of steps (b) and (c) is polyvinylidene fluoride.
Claim 14
Dependent Claim
49 words
The method of claim 1 wherein the coated substrate of step (a) is baked for a period of from about 20 seconds to about 180 seconds at a temperature of from about 200° C. to about 260° C. prior to application of the pigmented coating composition of step (b).
Claim 15
Dependent Claim
49 words
The method of claim 1 wherein the coated substrate of step (b) is baked for a period of from about 20 seconds to about 180 seconds at a temperature of from about 200° C. to about 260° C. prior to application of the clear coating composition of step (c).
Claim 16
Dependent Claim
38 words
The method of claim 1 wherein the coated substrate of step (c) is baked for a period of from about 20 seconds to about 180 seconds at a temperature of from about 200° C. to about 260° C.
Claim 17
Dependent Claim
10 words
The method of claim 1 wherein the substrate is steel.
Claim 18
Dependent Claim
10 words
The method of claim 1 wherein the substrate is aluminum.
Claim 19
Dependent Claim
10 words
A coated article produced by the method of claim 1.
Claim 20
Independent Claim
148 words
A method of providing a substrate with a multilayer coating comprising: a. applying a flexible primer coating composition to a substrate, said primer coating composition being a two package coating composition comprising an organic polyol, polyepoxide, a free polyisocyanate crosslinking agent and a phenolic resin, with the proviso that the organic polyol is present in one package and the polyisocyanate crosslinking agent is present in a second package, said coating composition having an elongation of at least 10 percent when cured; b. applying a pigmented coating composition to the coated substrate of step (a), said pigmented coating composition comprising a fluorocarbon polymer; c. applying a clear coating composition to the coated substrate of step (b), said clear coating composition comprising a fluorocarbon polymer; and d. at least partially curing the coated substrate of step (c); said multilayer coating having an elongation of at least 10 percent when cured.
Claim 21
Independent Claim
148 words
A method of providing a substrate with a multilayer coating comprising: a. applying a flexible primer coating composition to a substrate, said primer coating composition being a two package coating composition comprising an organic polyol, polyepoxide, a free polyisocyanate crosslinking agent and a phenolic resin, with the proviso that the organic polyol is present in one package and the polyisocyanate crosslinking agent is present in a second package, said coating composition having an elongation of at least 10 percent when cured; b. applying a pigmented coating composition to the coated substrate of step (a), said pigmented coating composition comprising a fluorocarbon polymer; c. applying a clear coating composition to the coated substrate of step (b), said clear coating composition comprising a fluorocarbon polymer; and d. at least partially curing the coated substrate of step (c); said multilayer coating having an elongation of at least 10 percent when cured.
Claim 22
Dependent Claim
15 words
The method of claim 1 wherein the polyisocyanate is blocked with a lower aliphatic alcohol.
Claim 23
Dependent Claim
13 words
The method of claim 1 wherein the polyisocyanate is blocked with an oxime.
Claim 24
Dependent Claim
13 words
The method of claim 21 wherein the oxime is methyl ethyl ketone oxime.
Claim 25
Dependent Claim
13 words
The method of claim 1 wherein the polyisocyanate is blocked with a lactam.
Claim 26
Dependent Claim
10 words
The method of claim 23 wherein the lactam is epsilon-caprolactam.
Claim 27
Dependent Claim
32 words
The method of claim 1 wherein the organic polyol has a number average molecular weight of from about 500 to about 20,000 and a hydroxyl number from about 30 to about 200.
Claim 28
Dependent Claim
20 words
The method of claim 1 wherein the epoxide equivalent weight of the polyepoxide ranges from about 280 to about 4,000.
Claim 29
Independent Claim
136 words
A method of providing a substrate with a multilayer coating comprising: (a) applying a flexible primer coating composition to a substrate, said primer coating composition being a two package coating composition comprising: a first package comprising an organic polyol, a polyepoxide and a phenolic resin and a second package comprising a free polyisocyanate crosslinking agent, said coating composition having an elongation of at least 10 percent when cured; (b) applying a pigmented coating composition to the coated substrate of step (a), said pigmented coating composition comprising a fluorocarbon polymer; (c) applying a clear coating composition to the coated substrate of step (b), said clear coating composition comprising a fluorocarbon polymer; and (d) at least partially curing the coated substrate of step (c); said multilayer coating composition having an elongation of at least 10 percent when cured.
Claim 30
Independent Claim
136 words
A method of providing a substrate with a multilayer coating comprising: (a) applying a flexible primer coating composition to a substrate, said primer coating composition being a two package coating composition comprising: a first package comprising an organic polyol, a polyepoxide and a phenolic resin and a second package comprising a free polyisocyanate crosslinking agent, said coating composition having an elongation of at least 10 percent when cured; (b) applying a pigmented coating composition to the coated substrate of step (a), said pigmented coating composition comprising a fluorocarbon polymer; (c) applying a clear coating composition to the coated substrate of step (b), said clear coating composition comprising a fluorocarbon polymer; and (d) at least partially curing the coated substrate of step (c); said multilayer coating composition having an elongation of at least 10 percent when cured.
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