Scuff and mar resistant coating compositions

Patent metadata

Field	Value
Publication number	US-12359074-B2
Application number	US-202418679904-A
Country	US
Kind code	B2
Filing date	May 31, 2024
Priority date	Jun 2, 2023
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

Coating compositions and extender packages for coating compositions that include first polymeric or inorganic extender particles, second polymeric or inorganic extender particles, and a polysiloxane dispersible in water. Both the first and second extender particles are relatively hard and have a narrow particle size distribution.

First claim

What is claimed is:

1. An aqueous coating composition comprising:
a film-forming binder;
a water-based carrier liquid;
optionally, 30 weight percent or less of at least one opacifying pigment based on the total weight of components of the coating composition;
first round polymeric or inorganic extender particles lacking sharp edges and points and having an aspect ratio of 1:1 to 3:1, a D 50 of 2 microns to 8 microns and a particle size span ((D 90 −D 10 )/D 50 ) of less than 2 as measured by laser diffraction particle size analysis, and, if inorganic, a Mohs hardness of at least 2 and, if polymeric, a Shore D hardness of at least 75;
second round polymeric or inorganic extender particles lacking in sharp edges and points, having an aspect ratio of 1:1 to 3:1, a D 50 of 8 microns to 30 microns, and a particle size span ((D 90 −D 10 )/D 50 ) of less than 2.5, wherein as measured by laser diffraction particle size analysis, and, if inorganic, a Mohs hardness of at least 2 and, if polymeric, a Shore D hardness of at least 75; and
a polysiloxane dispersable in water.

2. The coating composition of claim 1 , wherein the film-forming binder comprises a (meth)acrylic latex, a styrene-acrylic latex, a vinyl acetate latex, a urethane modified acrylic latex, or combinations thereof; and/or a polyurethane dispersion.

3. The coating composition of claim 1 , wherein the opacifying pigment is present and comprises titanium dioxide.

4. The coating composition of claim 1 , wherein the polysiloxane dispersible in water is selected from polydimethylsiloxane (PDMS) emulsions and/or polydiethylsiloxane (PDES) emulsions.

5. The coating composition of claim 1 , wherein the first extender particles have the same composition as the second extender particles.

6. The coating composition of claim 1 , wherein the first extender particles, the second extender particles, or both comprise ceramic.

7. The coating composition of claim 1 , wherein the first extender particles, the second extender particles, or both include an aluminosilicate.

8. The coating composition of claim 1 , wherein the D 50 of the second extender particles is at least 1.3× the D 50 of the first extender particles when measured laser diffraction particle size analysis.

9. The coating composition of claim 1 , wherein the first extender particles, the second extender particles, or preferably both, are essentially spherical.

10. The coating composition of claim 1 , wherein the carrier is at least 50 wt. % water, based on the weight of the carrier, and wherein the carrier optionally further includes a solvent selected from aliphatic, cycloaliphatic and aromatic hydrocarbons such as white spirit, cyclohexane, toluene, xylene and naphtha solvents, esters such as methoxypropyl acetate, n-butyl acetate and 2-ethoxyethyl acetate, or octamethyltrisiloxane, and mixtures thereof.

11. The coating composition of claim 1 , wherein the first extender particles are present in the coating composition in an amount of at least 10 lb/100 gallons (4.54 kg/378.5 liters) wet coating composition based on the total components of the coating composition.

12. The coating composition of claim 1 , wherein the first extender particles are present in the coating composition in an amount of at most 125 lb/100 gallons (56.70 kg/378.5 liters) wet coating composition based on the total components of the coating composition.

13. The coating composition of claim 1 , wherein the second extender particles are present in the coating composition in an amount of at least 5 lb/100 gallons (5.43 kg/378.5 liters) wet coating composition.

14. The coating composition of claim 1 , wherein the second extender particles are present in the coating composition in an amount of at most 120 lb/100 gallons wet coating composition.

15. The composition of claim 1 , wherein the polysiloxane is present in the aqueous coating composition in an amount of at least 0.5 lb per 100 (0.23 kg per 178.5 liters) gallons of coating composition.

16. The coating composition of claim 1 , wherein the polysiloxane is present in the aqueous coating composition in an amount of at most 25 lb per 100 gallons (11.34 kg per 178.5 liters) of coating composition.

17. The coating composition of claim 1 , wherein when applied to a substrate by drawdown with a 4 mil (0.10 mm) Bird bar and allowed to cure for about 10 minutes at room temperature then 30 minutes at 50° C., the cured coating has an 85° sheen of between 25 and 45 as measured by ASTM D523.

18. The coating composition of claim 1 , wherein when applied to a substrate by drawdown with a 4 mil (0.10 mm) Bird bar and allowed to cure for about 10 minutes at room temperature then 30 minutes at 50° C., the cured coating has an 85 Sheen of less than about 25 as measured by ASTM D523.

19. The coating composition of claim 18 , wherein when applied to a substrate by drawdown with a 4 mil (0.10 mm) Bird bar and allowed to cure for about 10 minutes at room temperature then 30 minutes at 50° C., the cured coating has a 60 Gloss of less than about 10 or an 85 Sheen of less than about 10 as measured by ASTM D523.

20. The coating composition of claim 19 , wherein when applied to a substrate by drawdown with a 4 mil (0.10 mm) Bird bar and allowed to cure for about 10 minutes at room temperature then 30 minutes at 50° C., the cured coating has a 60° gloss of less than about 5 and an 85° sheen of less than about 5 as measured by ASTM D523.

21. The coating composition of claim 1 , wherein when applied to a substrate by drawdown with a 4 mil (0.10 mm) Bird bar and allowed for about 10 minutes at room temperature then 30 minutes at 50° C., the cured coating has an 85° gloss of greater than 45 as measured by ASTM D523.

Assignees

• Swimc Llc

Inventors

• Reimann Jay
• Hemann Adriana
• Lazaruk Leo
• Mandato Angelo P
• Kasson Owen P

Classifications

• C09D7/70 Primary

  characterised by shape, e.g. fibres, flakes or microspheres · CPC title

• C09D7/61

  inorganic · CPC title

• C09D109/08

  Latex · CPC title

• C09D7/65 Primary

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