Coating process

Patent metadata

Field	Value
Publication number	US-12564860-B2
Application number	US-202318365022-A
Country	US
Kind code	B2
Filing date	Aug 3, 2023
Priority date	May 16, 2016
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

A process for coating a product by ion exchange including: a) providing a product that contains a surface segregating species (SSS) having a low surface energy component and an ionic component wherein the SSS has segregated to an outer surface of the product to form an activated surface; and b) treating the activated surface of the product with a liquid containing a surface modifying agent comprising one or more polyionic species, wherein the polyionic species is attracted to and deposits on the activated surface through a process of ion exchange.

First claim

What is claimed is:

1 . A coated product comprising:
a metal substrate, a polymer component deposited on the metal substrate, a surface segregating species as an electroactive additive within the polymer component, wherein the surface segregating species comprises an ionic component and a low surface energy component, wherein at least a portion of the surface segregating species has segregated to an outer surface of the polymer component, and a coating layer on the outer surface of the polymer component, wherein the coating layer comprises a surface modifying agent comprising a polyionic species that is bound to the ionic component of the surface segregating species.

2 . The product of claim 1 , wherein the metal substrate is a steel sheet.

3 . The product of claim 1 , wherein the polymer component is comprised in a paint layer.

4 . The product of claim 3 , wherein the surface segregating species has a concentration in the paint layer of between 0.5 and 10 wt %.

5 . The product of claim 1 , wherein the surface segregating species comprises an organic cation component covalently bound to a low surface energy component, and further wherein the polyionic species is bound to the organic cation component.

6 . The product of claim 1 , wherein the low surface energy component of the surface segregating species comprises a siloxane derivative, an organosilane derivative, a long chain alkyl group, an alkylene oxide oligomer or polymer, a fluorocarbon, or a dendrimer.

7 . The product of claim 1 wherein the ionic component of the surface segregating species is a quaternary ammonium ion.

8 . The product of claim 1 , wherein the surface segregating species is N-(3-trim ethoxy silyl propyl)-N,N,N-trimethyl ammonium chloride, N-(trimethoxysilyl)propyl-tetradecyldimethyl-ammonium chloride, benzyltrimethylammonium chloride, N-(3-trimethoxysilylethyl)benzyl-N,N,N-trimethylammonium chloride, cetyl trimethylammonium bromide, water-soluble silicone-quaternary amine compound, di-functional water-soluble silicone-quaternary amine compound, or a blend of a high molecular weight silicone-quaternary amine compound and a fatty quaternary amine compound.

9 . The product of claim 1 , wherein the surface modifying agent comprises a silica colloid, a mixture of functionalized silicas and polymer latexes, functionalized polymer latexes and their mixtures, or phyllosilicates.

10 . The product of claim 1 , wherein the surface modifying agent comprises a silica colloid.

11 . A coated product comprising:
a steel substrate; a paint layer on the steel substrate, wherein the paint layer comprises a polymer component and a surface segregating species as an electroactive additive within the polymer component, wherein the surface segregating species comprises an ionic component and a low surface energy component, wherein at least a portion of the surface segregating species has segregated to an outer surface of the paint layer, and a coating layer deposited on the outer surface of the paint layer, wherein the coating layer comprises a surface modifying agent comprising a polyionic species that is bound to the ionic component of the surface segregating species.

Assignees

• Bluescope Steel Ltd

Inventors

• Maclaughlin Shane A
• Xi Binbin

Classifications

• C09K23/54

  Silicon compounds · CPC title

• C09K23/18

  Quaternary ammonium compounds · CPC title

• C09D5/00 Primary

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• B05D7/14

  to metal, e.g. car bodies (involving a chemical reaction between the metal and the coating C23) · CPC title

• B05D5/08

  to obtain an anti-friction or anti-adhesive surface (rendering particulate materials free-flowing in general, e.g. making them hydrophobic B01J2/30) · CPC title