IP Library › Granted Patent US 9,028,920
Granted Patent B2
US 9,028,920 · App. 13/432,031 · Granted May 12, 2015

Pretreatment of metal surfaces prior to paint using polyaniline particles

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Quick Facts
Patent No.
US 9,028,920
App. No.
13/432,031
Granted
May 12, 2015
Kind
B2
Abstract

Embodiments of a method of pretreating a metal substrate prior to painting comprise applying a first coating solution onto the metal substrate wherein the first coating solution comprises polyaniline particles at a pH less than 7 to yield a first coating on the metal substrate, rinsing the metal substrate to remove unreacted polyaniline particles, and applying a second coating solution post-rinse which comprises at least one acid and a silane composition at a pH less than 7 to yield a second coating on the metal substrate.

Claims (14)

1. A method of pretreating a metal substrate prior to painting comprising:

applying a first coating solution onto the metal substrate wherein the first coating solution comprises sulfuric acid, citric acid, and polyaniline particles at a pH less than 7 to yield a first coating on the metal substrate;

rinsing the metal substrate to remove unreacted polyaniline and excess acid; and

applying a second coating solution post-rinse which comprises fluorozirconic acid and aminosilane at a pH less than 7 to yield a second coating on the metal substrate.

2. The method of claim 1 further comprising cleaning the metal substrate prior to the application of the first coating solution.

3. The method of claim 1 wherein the metal substrate comprise steel, aluminum, or alloys of each.

4. The method of claim 1 wherein the acid of the second coating solution further comprises organic acids.

5. The method of claim 1 wherein the second coating solution further comprises fluorotitanic acid.

6. The method of claim 1 wherein the first coating solution and the second coating solution are applied via spraying the metal substrate, immersing the metal substrate, or combinations thereof.

7. The method of claim 1 wherein the application of the first coating solution occurs for a period of about 15 seconds to about 5 minutes.

8. The method of claim 1 wherein the application of the second coating solution occurs for a period of about 15 seconds to about 5 minutes.

9. The method of claim 1 wherein the first coating solution comprises 0.1 to about 5% by weight polyaniline particles.

10. The method of claim 1 wherein the polyaniline particles comprise a particle size of between about 0.001 μm to about 100 μm.

11. The method of claim 1 wherein the polyaniline particles comprise nanoparticles having a particle size at or below 0.1 μm.

Assignments (15)
PATENT SECURITY AGREEMENT Recorded Jun 18, 2024
From: DUBOIS CHEMICALS, INC.
To: ANTARES CAPITAL LP, AS COLLATERAL AGENT
Reel/Frame 067774/0852 →
SECURITY INTEREST Recorded Jul 22, 2022
From: DUBOIS CHEMICALS, INC.
To: ANTARES CAPITAL LP, AS COLLATERAL AGENT
Reel/Frame 060588/0838 →
RELEASE OF SECURITY INTEREST Recorded Apr 4, 2021
From: WILMINGTON TRUST, NATIONAL ASSOCIATION
To: DUBOIS CHEMICALS, INC.
Reel/Frame 055814/0512 →
SECURITY INTEREST Recorded Jun 30, 2020
From: DUBOIS CHEMICALS, INC., AS GRANTOR
To: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 053085/0382 →
CORRECTIVE ASSIGNMENT TO CORRECT THE TITLE TO READ RELEASE OF SECURITY INTEREST RECORDED AT REEL/FRAME 042038/0101 PREVIOUSLY RECORDED ON REEL 050598 FRAME 0028. ASSIGNOR(S) HEREBY CONFIRMS THE RELEASE OF SECURITY INTEREST. Recorded Oct 10, 2019
From: ANTARES CAPITAL LP
To: DUBOIS CHEMICALS, INC.
Reel/Frame 052091/0032 →
RELEASE OF SECURITY INTEREST RECORDED AT REEL/FRAME 04238/0101 Recorded Oct 1, 2019
From: ANTARES CAPITAL LP
To: DUBOIS CHEMICALS, INC.
Reel/Frame 050598/0028 →
SECURITY INTEREST Recorded Oct 1, 2019
From: DUBOIS CHEMICALS, INC.
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 050573/0202 →
SECURITY INTEREST Recorded Oct 1, 2019
From: DUBOIS CHEMICALS, INC.
To: ANTARES CAPITAL LP, AS COLLATERAL AGENT
Reel/Frame 050573/0867 →
RELEASE OF SECURITY INTEREST RECORDED AT REEL/FRAME 042038/0153 Recorded Oct 1, 2019
From: ANTARES CAPITAL LP
To: DUBOIS CHEMICALS, INC.
Reel/Frame 050597/0851 →
FIRST LIEN INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded Mar 17, 2017
From: DUBOIS CHEMICALS, INC.
To: ANTARES CAPITAL LP
Reel/Frame 042038/0101 →
SECOND LIEN INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded Mar 17, 2017
From: DUBOIS CHEMICALS, INC.
To: ANTARES CAPITAL LP
Reel/Frame 042038/0153 →
RELEASE OF SECURITY INTEREST IN INTELLECTUAL PROPERTY COLLATERAL RECORDED AT REEL 029549/FRAME 0142 Recorded Mar 15, 2017
From: ANTARES CAPITAL LP, SUCCESSOR AGENT TO GENERAL ELECTRIC CAPITAL CORPORATION
To: DUBOIS CHEMICALS, INC.
Reel/Frame 042020/0826 →
ASSIGNMENT OF INTELLECTUAL PROPERTY SECURITY AGREEMENTS Recorded Oct 9, 2015
From: GENERAL ELECTRIC CAPITAL CORPORATION, AS RETIRING AGENT
To: ANTARES CAPITAL LP, AS SUCCESSOR AGENT
Reel/Frame 036826/0621 →
SECURITY AGREEMENT Recorded Dec 28, 2012
From: DUBOIS CHEMICALS, INC.
To: GENERAL ELECTRIC CAPITAL CORPORATION, AS AGENT
Reel/Frame 029549/0142 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 28, 2012
From: SCHIMPFF, DAVID; DUNHAM, BRUCE; FRISZ, WILLIAM; ZHANG, JUN Q.
To: DUBOIS CHEMICALS, INC.
Reel/Frame 027942/0467 →