Additives for improved hiding and paint compositions containing same

Patent metadata

Field	Value
Publication number	US-9453133-B2
Application number	US-201414531354-A
Country	US
Kind code	B2
Filing date	Nov 3, 2014
Priority date	Dec 18, 2012
Publication date	Sep 27, 2016
Grant date	Sep 27, 2016

Abstract

The architectural compositions, such as paints and stains, include an additive comprising a plurality of latex particles added to an existing mixture of opacifying pigments and a film-forming binder as an admixture. Each latex particle is made from a latex polymer copolymerized with a polymerizable surfactant. The latex polymer is a non-film forming polymer at ambient temperatures.

First claim

We claim:

1. An architectural composition comprising:
an additive comprising latex particles, wherein the latex particles comprise a polymer copolymerized with a polymerizable surfactant, wherein the polymer is non-film forming at room temperature and has a glass transition temperature greater than about 30° C.;
opacifying pigments; and
a film-forming polymer binder;
wherein the polymerizable surfactant comprises a first end that bonds the additive to the film-forming polymer binder and a second end that adsorbs the additive to the opacifying pigments; and
wherein the latex particles form an admixture with the film-forming polymer binder.

2. The architectural composition of claim 1 , wherein the glass transition temperature is greater than about 50° C.

3. The architectural composition of claim 1 , wherein the glass transition temperature is greater than about 100° C.

4. The architectural composition of claim 1 , wherein the first end of the polymerizable surfactant comprises a mono or multi allyl.

5. The architectural composition of claim 1 , wherein the second end of the polymerizable surfactant comprises a phosphate or sulfate end.

6. The architectural composition of claim 1 , wherein the latex particles comprise a volume average particle size of from about 100 nm to about 200 nm.

7. The architectural composition of claim 1 , wherein the latex particles comprise a volume average particle size of from about 140 nm to about 150 nm.

8. The architectural composition of claim 1 , wherein a weight ratio of additive to the opacifying pigments in the architectural composition is from about 1:5 to about 1:15.

9. The architectural composition of claim 1 , wherein a weight ratio of additive to the opacifying pigments in the architectural composition is from about 1:7.5 to about 1:12.5.

10. The architectural composition of claim 1 , wherein the latex polymer copolymerized with the polymerizable surfactant comprises from about 5% to about 25% of a total amount of polymer in the architectural composition.

11. The architectural composition of claim 1 , wherein the latex polymer copolymerized with the polymerizable surfactant comprises from about 7% to about 15% of a total amount of polymer in the architectural composition.

12. The architectural composition of claim 1 , wherein the additive comprises from about 0.5% to about 7.5% by weight of the architectural composition.

13. The architectural composition of claim 1 , wherein the additive comprises from about 1.0% to about 3.5% by weight of the architectural composition.

14. An additive for the architectural composition, the additive comprising:
a plurality of latex particles, each latex particle comprising a latex polymer copolymerized with a polymerizable surfactant, the latex polymer is non-film forming at room temperature polymer and has a glass transition temperature greater than about 30° C.;
wherein the additive is capable of forming an admixture with a binder in the architectural composition and wherein the polymerizable surfactant comprises a first end that is capable of bonding to the binder and a second end capable of adsorbing to opacifying pigments in the architectural composition.

15. The additive of claim 14 , wherein the second end of the polymerizable surfactant comprises a phosphate or sulfate end and the first end of the polymerizable surfactant comprises a mono or multi allyl end.

16. The additive of claim 14 , wherein the latex particles comprise a volume average particle size of from about 75 nm to about 200 nm.

Assignees

• Columbia Insurance Co

Inventors

• Dandreaux Gary
• Brewer Ashley
• Jardel Caleb
• Ogorzalek Paulina
• Shavel Luz Clarena
• Sheerin Robert

Classifications

• C09D151/003

  grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds (C09D151/04, C09D151/06 take precedence) · CPC title

• C08F285/00

  Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers · CPC title

• C08F265/02

  on to polymers of acids, salts or anhydrides · CPC title

• C09D7/65 Primary

  macromolecular (C09D7/41-C09D7/48 take precedence) · CPC title

• C08F265/06

  Polymerisation of acrylate or methacrylate esters on to polymers thereof · CPC title