Process for producing a repair coating on a coated metallic surface

Patent metadata

Field	Value
Publication number	US-9327315-B2
Application number	US-201314055390-A
Country	US
Kind code	B2
Filing date	Oct 16, 2013
Priority date	Nov 10, 2004
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

A process for producing a repair coating on at least one metallic surface that is coated with at least one corrosion protection coating A applied with at least one composition selected from the group of pretreatment compositions, of organic compositions and of silicon compound(s) containing compositions, whereby the at least one corrosion protecting coating A has been at least partially removed in the area Z, whereby a thin corrosion protecting coating B containing at least one silicon compound is applied with a solution or dispersion containing at least one silane, at least one silanol, at least one siloxane, at least one polysiloxane or any mixture of these (=“siloxane composition”) on at least a part of the area Z. Optionally, a further corrosion protecting coating C may he applied on the thin corrosion protecting coating B generated with the siloxane composition whereby the at least one further corrosion protecting coating C is generated with at least one organic composition like a primer, a wet-primer, an e-coat, a powder coat, a base-coat or a clear-coat or with at least one composition which is the same or another siloxane composition as for the thin film B.

First claim

What is claimed is:

1. A process comprising
applying a corrosion protection coating to a metallic surface;
removing the corrosion protection coating from the metallic surface in at least an area Z of the metallic surface; and
forming a repair coating on at least a part of the area Z by applying a solution or dispersion comprising at least one silicon compound selected from the group consisting of a silane, a silanol, a siloxane, and mixtures thereof, on at least a part of the area Z.

2. The process according to claim 1 , whereby a film B of the solution or dispersion comprising at least one silicon compound is applied by contacting a tool that contains and dispenses the solution or dispersion comprising at least one silicon compound.

3. The process according to claim 1 , whereby a film B of the solution or dispersion comprising at least one silicon compound is applied by spraying the solution or dispersion comprising at least one silicon compound with a spray can.

4. The process according to claim 1 , whereby a film B of the solution or dispersion comprising at least one silicon compound is applied with a tool that has a storage chamber for the solution or dispersion comprising at least one silicon compound.

5. The process according to claim 1 , whereby a film B of the solution or dispersion comprising at least one silicon compound is applied by using a brush, a sponge, a tampon, a stick and a gel-pack.

6. The process according to claim 1 , whereby a film B of the solution or dispersion comprising at least one silicon compound is applied by using a tool with a storage chamber having a membrane or another porous material with the ability to transmit the solution or dispersion comprising at least one silicon compound from the storage chamber to the working surface of the tool.

7. The process according to claim 1 , whereby a film B of the solution or dispersion comprising at least one silicon compound is formed, and wherein film B has a wet thickness of about 0.005 μm to about 40 μm.

8. The process according to claim 1 , whereby a film B of the solution or dispersion comprising at least one silicon compound is formed, and wherein film B has a dry thickness of about 0.001 μm to about 3 μm.

9. The process according to claim 1 , whereby the solution or dispersion comprising at least one silicon compound has a viscosity in the range of about 1 to about 250 mPa·s, measured at 20° C.

10. The process according to claim 1 , whereby the silicon compound is selected from the group consisting of an acyloxysilne, a silane with at least one amine group, a silane with at least one succinic acid group or succinic acid anhydride group, a bis-silyl-silane, a silane with at least one epoxy group, a (meth)acrtlaye-silane, a multi-silyl-silane, an ureidosilane, a vinylsilane, a silanol, siloxane, derivative, to reaction product of any of the foregoing, and mixtures thereof.

11. The process according to claim 1 , whereby the silicon compound is selected from the group consisting of a partially hydrolysed silane, a totally hydrolysed silane, an oligomeric siloxane, and mixtures thereof.

12. The process according to claim 1 , whereby the silicon compound comprises at least one silicon compound having at least two silyl groups per molecule and/or at least one organosilicon compound having at least one group selected from the group consisting of an amino groups, an epoxy group, a glycidoxy group, an hydroxyl group, an isocyanate group, a mercapto group, a (meth)acrylato group, a (poly)sulfur group, a thiol group, an ureido group, a vinyl group, a vinylbenzene group, and mixtures thereof.

Assignees

• Chemetall Gmbh

Inventors

• Eriksson Mats
• Walter Manfred

Classifications

• C23C26/02

  applying molten material to the substrate · CPC title

• B05D5/005 Primary

  Repairing damaged coatings · CPC title

• B05D7/26 Primary

  synthetic lacquers or varnishes (B05D7/08, B05D7/16 take precedence) · CPC title

• B05D7/51

  One specific pretreatment, e.g. phosphatation, chromatation, in combination with one specific coating (pretreatment of metallic substrates C23C; pretreatment before coating in general B05D3/00) · CPC title

• B05D3/002

  Pretreatement · CPC title