US 7,081,488 B2 · Coating with improved hiding, compositions prepared therewith, and processes for the preparation thereof

Abstract

A coating containing pigment particles and a polymer matrix is provided. The coating contains pigment particles that have a scattering coefficient with a linear or quasi-linear relationship to the pigment volume concentration of those pigment particles. The coating has improved hiding and is useful as a protective coating or an aesthetic coating on an underlying substrate. Also provided are compositions useful for preparing the coating, including covalently bonded composite particles and aqueous dispersions containing composite particles. The composite particles each contain a pigment particle with a plurality of polymer particles attached by adsorption on the outer surface of the pigment particle or by covalent bonding to the pigment particle through a coupling agent. Methods to prepare the composite particles and coating compositions containing the composite particles are also provided.

Claims1

Dependent claims

A coating composition comprising:

(a) a coating comprising composite particles having:
a pigment particle with an average particle diameter of up to 1 micron, a surface, and an index of refraction of at least 1.8;
a first plurality of polymer particles on a surface of said pigment particle, each one of said polymer particles having at least one functional group forming a covalent bond with said pigment particle;
and
a second plurality of reacted coupling agents, each one of said reacted coupling agents covalently bonded to said pigment particle and to a corresponding one of said first plurality of polymer particles;
and
b) a binder.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

10/174,158Filed 18 Jun 2002 · us provisional application

Priority

20 Jun 2001

Published

US 2003/0018103 A123 Jan 2003

Granted

25 Jul 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification34 codes

C09D 5/028
Characterised by the additives: pigments; Filters
B82Y 30/00
Nanotechnology for materials or surface science
C08F 265/04
Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined…
C08F 265/06
On to polymers of esters: polymerisation of acrylate or methacrylate esters on to polymers thereof

Family

Application60/299,701Us provisional application · filed 20 Jun 2001

Application60/306,929Us provisional application · filed 20 Jul 2001

Application60/311,207Us provisional application · filed 9 Aug 2001

Application60/318,734Us provisional application · filed 12 Sep 2001

Application60/325,382Us provisional application · filed 26 Sep 2001

Application60/337,742Us provisional application · filed 9 Nov 2001

Application60/377,975Us provisional application · filed 7 May 2002

US 2003/0018103 A1Pre-grant publication · published 23 Jan 2003

US 7,081,488 B2This patent

From the US filing history. Foreign family members aren’t listed.

Coating with improved hiding, compositions prepared therewith, and processes for the preparation thereof

Life of this patent

Coating with improved hiding, compositions prepared therewith, and processes for the preparation thereof

Life of this patent

Abstract

Claims1