Process for the coating of metallic components with an aqueous organic composition

Patent metadata

Field	Value
Publication number	US-9365727-B2
Application number	US-201213413845-A
Country	US
Kind code	B2
Filing date	Mar 7, 2012
Priority date	Apr 14, 2005
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A process for the coating of surfaces of a metallic component to be formed by contacting the surfaces of the metallic component prior to forming operation with an aqueous composition containing 80% by weight of at least one organic film-forming ionomeric polymer or copolymer, whereby the total organic polymeric material has an average acid number in the range from 20 to 300, optionally at least one further organic film-forming polymer different from the organic film-forming ionomeric polymer or copolymer; optionally a neutralizing agent; a low temperature corrosion inhibiting cross-linking agent and water. The pH of the aqueous composition at the beginning of the coating process is in the range from 6 to 10.5.

First claim

The invention claimed is:

1. A process comprising
coating of surfaces of a metallic component having a metallic surface to be formed by at least one forming operation by contacting the metallic surface of the metallic component prior the forming operation with an aqueous composition that contains predominantly organic material, and contains at least one compound each of:
A) an organic film-forming polymeric material selected from the group consisting of an ionomeric copolymer or a copolymer chemically related to ionomeric copolymer having the properties of ionomeric copolymers or a corresponding monomer, comonomer, oligomer, cooligomer, polymer, blockcopolymer or an ester, salt or derivate thereof, which all together are constituents of at least 70% by weight of total organic polymeric material, wherein the total organic material has an average acid number in the range from 210 to 300; and
a cross-linking agent; and
water;

wherein the pH of the aqueous composition when applied is in the range from 6 to 10.5, wherein no wax or oil are added to the aqueous composition, wherein the aqueous composition or the ionomeric copolymer or copolymer chemically related to ionomeric copolymer for the aqueous composition or any combination of these are prepared by heating an aqueous copolymeric base composition containing at least one of the organic copolymers and at least one neutralizing agent to temperatures in the range from 50 to 150° C. for a time of at least half a minute, wherein the organic film-forming copolymer as constituent A) to be added to the aqueous composition is a material containing predominantly at least one member selected from the group consisting ethylene naphthalic anhydride copolymer and propylene naphthalic anhydride copolymer, and
forming the coated metallic component by at least one forming operation selected from the group consisting of cold-forming, cold-forging, roll-stamping, roll-forming, deep-drawing and wire-drawing.

2. A process comprising
coating of surfaces of a metallic component having a metallic surface to be formed by at least one forming operation by contacting the metallic surface of the metallic component prior the forming operation with an aqueous composition that comprises predominantly organic material, and contains at least one compound each of:
A) an organic film-forming polymeric material selected from the group consisting of an ionomeric copolymer or a copolymer chemically related to ionomeric copolymer having the properties of ionomeric copolymers or a corresponding monomer, comonomer, oligomer, cooligomer, polymer, blockcopolymer or an ester, salt or derivate thereof, which all together are constituents of at least 70% by weight of the total organic polymeric material; and
A′) at least one further organic film-forming polymer or a corresponding monomer, oligomer, copolymer, blockcopolymer, derivate thereof or any combination thereof that do not belong to A) participating in the rest of the total organic polymeric material to 100% by weight;
B) a neutralizing agent;
C) a cross-linking agent; and
D) water;

wherein the pH of the aqueous composition when applied is in the range from 6 to 10.5, wherein no wax or oil is present in the coating; wherein the aqueous composition or the ionomeric copolymer or copolymer chemically related to ionomeric copolymer for the aqueous composition or any combination of these are prepared by heating an aqueous copolymeric base composition containing at least one of the organic copolymers and at least one neutralizing agent to temperatures in the range from 50 to 150° C. for at least 30 seconds, wherein the organic film forming copolymer is selected from the group consisting of ethylene naphthalic anhydride copolymer and propylene naphthalic anhydride copolymer, and wherein the total organic material has an average acid value of 210 to 300: and
forming the coated metallic component by at least one forming operation selected from the group consisting of cold-forming, cold-forging, roll-stamping, roll-forming, deep-drawing and wire-drawing; and

wherein no pretreatment layer is applied prior to the coating.

3. A process comprising
coating of surfaces of a metallic component having a metallic surface to be formed by at least one forming operation by contacting the metallic surface of the metallic component prior the forming operation with an aqueous composition that contains predominantly organic material, and contains at least one compound each of:
an organic film-forming polymeric material selected from the group consisting of an ionomeric copolymer or a copolymer chemically related to ionomeric copolymer having the properties of ionomeric copolymers or a corresponding monomer, comonomer, oligomer, cooligomer, polymer, blockcopolymer or an ester, salt or derivate thereof, which all together are constituents of at least 70% by weight of total organic polymeric material; and
a cross-linking agent selected from the group of corrosion inhibiting cross-linking agents consisting of compounds of yttrium, titanium, hafnium, zirconium, zinc and a lanthanide containing compound; and
water;

wherein the pH of the aqueous composition when applied is in the range from 6 to 10.5, wherein no wax or oil are added to the aqueous composition, wherein the aqueous composition or the ionomeric copolymer or copolymer chemically related to ionomeric copolymer for the aqueous composition or any combination of these are prepared by heating an aqueous copolymeric base composition containing the organic film forming polymeric material and at least one neutralizing agent to temperatures in the range from 50 to 150° C. for a time of at least half a minute, wherein the organic film-forming copolymer is a material containing predominantly ethylene/propylene naphthalic anhydride copolymers, and wherein the total organic material has an average acid value of 225 to 300; and
forming the coated metallic component by at least one forming operation selected from the group consisting of cold-forming, cold-forging, roll-stamping, roll-forming, deep-drawing and wire-drawing.

4. A process comprising
coating of surfaces of a metallic component having a metallic surface to be formed by at least one forming operation by contacting the metallic surface of the metallic component prior the forming operation with an aqueous composition that comprises predominantly organic material, and contains at least one compound each of:
A) an organic film-forming polymeric material selected from the group consisting of an ionomeric copolymer or a copolymer chemically related to ionomeric copolymer having the properties of ionomeric copolymers or a corresponding monomer, comonomer, oligomer, cooligomer, polymer, blockcopolymer or an ester, salt or derivate thereof, which all together are constituents of at least 70% by weight of total organic polymeric material; and
A′) at least one further organic film-forming polymer or a corresponding monomer, oligomer, copolymer, blockcopolymer, derivate thereof or any combination thereof that do not belong to A) participating in the rest of the total organic polymeric material to 100% by weight;
B) a neutralizing agent;
C) a cross-linking agent; and
D) water;

wherein the pH of the aqueous composition when applied is in the range from 6 to 10.5, wherein no wax or oil is present in the coating; wherein the aqueous composition or the ionomeric copolymer of copolymer chemically related to ionomeric copolymer for the aqueous composition or any combination of these are prepared by heating an aqueous copolymeric base composition containing at least one of the organic copolymers and at least one neutralizing agent to temperatures in the range from 50 to 150° C. for at least 30 seconds, wherein the organic film forming copolymer is selected from the g

Assignees

• Smith Noel
• Domes Heribert
• Chemetall Gmbh

Inventors

• Smith Noel
• Domes Heribert

Classifications

• Y10T428/31699

  Ester, halide or nitrile of addition polymer · CPC title

• C09D5/4411

  Homopolymers or copolymers of acrylates or methacrylates · CPC title

• Y10T428/24628

  Nonplanar uniform thickness material · CPC title

• C09D5/002 Primary

  Priming paints (C09D5/08 takes precedence) · CPC title

• Y10T428/1355

  Elemental metal containing [e.g., substrate, foil, film, coating, etc.] · CPC title