Patent EP0121656A2 successfully refreshed from Google Patents.
EP0121656A2
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EP
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Alkaline aqueous coating solution and process
Assignee: Pennwalt Corp
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Filing: 1984-01-18
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Granted: —
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Expires: 2004-01-18
Abstract
Abstract An aqueous alkaline coating bath for forming clear, corrosion and tarnish-resistant coatings on metals such as aluminum and steel includes divalent metal ions such as calcium and magnesium, a volatile complexing agent for the metal ions, water soluble salts of an acrylic polymer which contains carboxyl groups and a defoaming agent.
Inventors
- 👤 Richard George Adams
- 👤 Kurt Goltz
- 👤 Frederick John Spaeth
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 13:50
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/064
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
50 words
An aqueous, alkaline coating composition comprising greater than about 0.25 gm/liter and less than about 5.0 gm/liter of composition of a water soluble salt of an acrylic polymer which contains carboxyl groups, a divalent metal ion which is effective to crosslink the acrylic polymer, a volatile base, and a defoamer.
Claim 2
Dependent Claim
50 words
An aqueous, alkaline coating composition comprising greater than about 0.25 gm/liter and less than about 5.0 gm/liter of composition of a water soluble salt of an acrylic polymer which contains carboxyl groups, a divalent metal ion which is effective to crosslink the acrylic polymer, a volatile base, and a defoamer.
Claim 3
Dependent Claim
23 words
The coating composition of claim 1 wherein the composition includes a divalent metal ion selected from the group consisting of magnesium and calcium.
Claim 4
Dependent Claim
13 words
The coating composition of claim 1 wherein the volatile base is ammonium hydroxide.
Claim 5
Dependent Claim
14 words
The coating composition of claim 1 wherein the defoamer is a a-hydro-omega-hydroxy-poly(oxyethylene)poly--(oxypropylene)poly(oxyethylene) block copolymer.
Claim 6
Dependent Claim
16 words
The coating composition of claim 1 which includes a volatile amine as a film forming aid.
Claim 7
Dependent Claim
18 words
The coating composition of claim 5 which contains from about 2.9 gm/liter to about 47 gm/liter of amine.
Claim 8
Dependent Claim
12 words
The coating composition of claim 1 which includes a glycol ether solvent.
Claim 9
Dependent Claim
21 words
The coating composition of claim 7 which contains from about 3.0 gm/liter to about 54 gm/liter of said glycol ether solvent.
Claim 10
Dependent Claim
21 words
The coating composition of claim 1 which contains from about 0.018 gm/liter to about 0.452 gm/liter of said divalent metal ion.
Claim 11
Dependent Claim
20 words
The coating composition of claim 1 which contains from about 0.240 gm/liter to about 2.0 gm/liter of said volatile base.
Claim 12
Dependent Claim
16 words
The coating composition of claim 1 having a pH of from about 8.5 to about 11.0.
Claim 13
Dependent Claim
41 words
The coating composition of claim 1 wherein the acrylic polymer is a terpolymer of ethyl acrylate, methyl methacrylate and methacrylic acid having from about 3 to 15 weight percent of carboxyl functionality and a molecular weight from about 30,000 to 260,000.
Claim 14
Dependent Claim
25 words
The coating composition of claim 1 wherein the defoamer is present in an amount of from about 0.67 gm/liter to about 5.3 gm/liter of composition.
Claim 15
Dependent Claim
20 words
The coating composition of claim 1 which contains from about 0.50 gm/liter to about 2.5 gm/liter of said acrylic polymer.
Claim 16
Dependent Claim
81 words
A process for forming a corrosion-resistant coating on a metal substrate comprising coating the surface of the substrate with an aqueous alkaline composition comprising greater than about 0.25 gm/liter to less than about 5.0 gm/liter of composition of a water soluble salt of an acrylic polymer which contains carboxyl groups, a divalent metal ion which is effective to crosslink the acrylic polymer, a volatile base and a defoamer so as to form a dry, crosslinked acrylic polymer coating on said surface.
Claim 17
Dependent Claim
81 words
A process for forming a corrosion-resistant coating on a metal substrate comprising coating the surface of the substrate with an aqueous alkaline composition comprising greater than about 0.25 gm/liter to less than about 5.0 gm/liter of composition of a water soluble salt of an acrylic polymer which contains carboxyl groups, a divalent metal ion which is effective to crosslink the acrylic polymer, a volatile base and a defoamer so as to form a dry, crosslinked acrylic polymer coating on said surface.
Claim 18
Dependent Claim
16 words
The process of claim 15 wherein the composition is at a temperature of from about 70-120°F.
Claim 19
Dependent Claim
14 words
The process of claim 15 wherein the coating is dried and crosslinked by heating.
Claim 20
Dependent Claim
12 words
The process of claim 15 wherein the substrate is coated by spraying.
Claim 21
Dependent Claim
14 words
The process of claim 15 wherein the metal substrate is aluminum or steel .
Claim 22
Dependent Claim
22 words
The process of claim 15 wherein the composition includes a divalent metal ion selected from the group consisting of magnesium or calcium.
Claim 23
Dependent Claim
12 words
The process of claim 15 wherein the volatile base is ammonium hydroxide.
Claim 24
Dependent Claim
14 words
The process of claim 15 wherein the defoamer is a a-hydro-omega-hydroxy-poly(oxyethylene)poly(oxypropylene) poly(oxyethylene) block copolymer.
Claim 25
Dependent Claim
17 words
The process of claim 15 wherein the composition includes a volatile amine as a film forming aid.
Claim 26
Dependent Claim
19 words
The process of claim 23 wherein the composition contains from about 2.9 gm/liter to about 47 gm/liter of amine.
Claim 27
Dependent Claim
13 words
The process of claim 15 wherein the composition includes a glycol ether solvent.
Claim 28
Dependent Claim
22 words
The process of claim 25 wherein the composition contains from about 3.0 gm/liter to about 54 gm/liter of said glycol ether solvent.
Claim 29
Dependent Claim
22 words
The process of claim 15 wherein the composition contains from about 0.018 gm/liter to about 0.452 gm/liter of said divalent metal ion.
Claim 30
Dependent Claim
21 words
The process of claim 15 wherein the composition contains from about 0.240 gm/liter to about 2.0 gm/liter of said volatile base.
Claim 31
Dependent Claim
15 words
The process of claim 15 having a pH of from about 8.5 to about 11.0.
Claim 32
Dependent Claim
40 words
The process of claim 15 wherein the acrylic polymer is a terpolymer of ethyl acrylate, methyl methacrylate and methacrylic acid having from about 3 to 15 weight percent of carboxyl functionality and a molecular weight from about 30,000 to 260,000.
Claim 33
Dependent Claim
24 words
The process of claim 15 wherein the defoamer is present in an amount of from about 0.67 gm/liter to about 5.3 gm/liter of composition.
Claim 34
Dependent Claim
21 words
The process of claim 15 wherein the composition contains from about 0.50 gm/liter to about 2.5 gm/liter of said acrylic polymer.
References Cited (Backward Citations)
No citation records indexed.
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