Water borne coating compositons and polymers therefor

Abstract

Copolymers and latex paint compositions using such copolymers that are heat-age stable and provide good adhesion, block resistance, and hiding all while using lower amounts of pigment are described herein. In one aspect, the heat-age stable compositions include an acrylic, styrene acrylic, vinyl acrylic copolymer or blends thereof including, as additional polymerizable units, at least one polymerizable phosphate surfactant and at least one linear or branched hydrophobic monomer that are both polymerized into the acrylic, styrene acrylic, vinyl acrylic copolymer backbone.

Description

[0001]This application is a continuation of U.S. application Ser. No. 15 / 252,254, filed Aug. 31, 2016, which claims the benefit of U.S. provisional application number No. 62 / 356,836 filed on Jun. 30, 2016, the entirety of both are hereby incorporated by reference.BACKGROUND1. Field of the Invention[0002]This application relates to heat-age stable water borne coating compositions and polymers thereof with good adhesion, block resistance, and hiding. In other approaches, the application relates to low or no VOC heat-age stable water borne coating compositions and polymers thereof with good adhesion, block resistance, and hiding with reduced levels of pigments,2. Description of Related Art[0003]Paints typically contain four ingredients: a carrier liquid, a binder, one or more pigments, and one or more additives to provide the paint with desired properties. Each such ingredient may comprise a single component or several different components mixed into the paint.[0004]The carrier liquid ...

AI Technical Summary

Benefits of technology

This patent describes a new type of paint composition that uses less pigment or inorganic particles to achieve better adhesion, blocking resistance, and hiding. The paint includes a special polymer that is mixed with an inorganic particle. This special polymer is made up of an acrylic or styrene acrylic polymer, along with a phosphate surfactant and a specific type of monomer. The resulting paint has improved properties like adhesion, blocking resistance, and hiding, even with lower levels of pigment or inorganic particles. The polymer used in the paint can form a stable complex with the inorganic particles, ensuring good hiding and a smooth paint application. Overall, this patent provides a way to create a stable latex paint that requires less pigment or inorganic particles while still providing good hiding and performance.

Problems solved by technology

One of the most effective and, hence, one of the most widely used opacifying pigments is titanium dioxide or TiO2, Although very effective, titanium dioxide is expensive and in many applications is the most expensive component of a water-borne paint composition.

Various paint compositions have been proposed for utilizing titanium dioxide more efficiently; however, most of these paint compositions are less desired and such compositions also tend to be less stable over time.

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