Fluorinated ester compound additives for architectural coatings

1. A composition comprising (a) a coating base selected from a water-dispersed coating, an epoxy polymer coating, an alkyd coating, a Type I urethane coating, or an unsaturated polyester coating; and (b) a fluorinated ester compound represented by formula (I):

[A s Y (CH 2 ) x -Q-Z—(CH 2 ) y —R f ] t   (I)

where

A is independently —OH, a C 1 -C 18 alkyl, —CH 2 OH, —CH 2 COOH, or (CH 2 CH 2 O) a (CH 2 CH(CH 3 )O) b H;

a and b are independently 0 to 3, where a+b is 1 to 3;

s is 0, 1, or 2;

Y is a linear or branched alkylene organic group having t+s substitutions, optionally interrupted by ether oxygen —O— and optionally having one or more alkoxylate linking groups that bond with A or [(CH 2 ) x -Q-Z-(CH 2 ) y -R f ];

x is 0 or 1;

Q is —C(O)O— or —OC(O)—;

Z is —(CH 2 ) y S— or —(CH 2 CH 2 O) m (CH 2 CH(CH 3 )O) n- ;

y is 2 to 6;

m and n are independently 0 to 6, where m+n is 1 to 6;

R f is a straight or branched perfluoroalkyl group of 2 to 20 carbon atoms, optionally interrupted by one or more —CH 2 —, —CFH—, ether oxygens —O—, or combinations thereof; and

t is 2, 3, 4, 5, or 6, such that s+t is 2 to 6.

2. The composition of claim 1 , wherein the composition comprises (a) the coating base in an amount of from about 95 to 99.98% and (b) the fluorinated ester compound in an amount of from about 0.02 to 5% by weight, based on the total weight of (a) and (b).

3. The composition of claim 1 , where A is OH or C 1 to C 4 alkyl.

4. The composition of claims 1 , where s is 0 or 1.

5. The composition of claim 1 , where t is 3 or 4.

6. The composition of claim 1 , where Y is a C 2 to C 10 linear alkylene or a structure of formulas (II), (III), or (IV):

where R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are independently —CH 2 —(CH 2 CH 2 O) a (CH 2 CH(CH 3 )O) b- , a direct bond to A, or a direct bond to [(CH 2 ) x -Q-Z-(CH 2 ) y -R f ]; wherein a and b are defined as above.

7. The composition of claim 1 , where the fluorinated ester compound (b) is water insoluble.

8. The composition of claims 1 , where the coating base is a water-dispersed coating in the form of an aqueous acrylic latex paint.

9. The composition of claim 1 , where the coating base comprises an additive selected from TiO 2 , clays, asbestos, calcium carbonate, zinc oxide, chromium oxide, barium sulfate, iron oxide, tin oxide, calcium sulfate, talc, mica, silicas, dolomite, zinc sulfide, antimony oxide, zirconium dioxide, silicon dioxide, cadmium sulfide, cadmium selenide, lead chromate, zinc chromate, nickel titanate, diatomaceous earth, glass fibers, glass powders, glass spheres, blue pigments, red pigments, yellow pigments, orange pigments, process aggregated crystals, brown pigments, or green pigments.

10. An article comprising a substrate and a dried coating thereon, where the dried coating results from drying a composition comprising (a) a coating base selected from a water-dispersed coating, an epoxy polymer coating, an alkyd coating, a Type I urethane coating, or an unsaturated polyester coating; and (b) a fluorinated ester compound represented by formula (I):

[A s Y (CH 2 ) x -Q-Z—(CH 2 ) y —R f ] t   (I)

where

A is independently —OH, a C 1 -C 18 alkyl, -CH 2 OH, -CH 2 COOH, or (CH 2 CH 2 O) a (CH 2 CH(CH 3 )O) b H;

a and b are independently 0 to 3, where a+b is 1 to 3;

s is 0, 1, or 2;

Y is a linear or branched alkylene organic group having t+s substitutions, optionally interrupted by ether oxygen —O— and optionally having one or more alkoxylate linking groups that bond with A or [(CH 2 ) x -Q-Z-(CH 2 ) y -R f ];

x is 0 or 1;

Q is —C(O)O—or —OC(O)—-;

Z is —(CH 2 ) y S— or —(CH 2 CH 2 O) m (CH 2 CH(CH 3 )O) n -;

y is 2 to 6;

m and n are independently 0 to 6, where m+n is 1 to 6;

R f is a straight or branched perfluoroalkyl group of 2 to 20 carbon atoms, optionally interrupted by one or more —CH 2 —, —CFH—, ether oxygens —O—, or combinations thereof; and

t is 2, 3, 4, 5, or 6, such that s+t is 2 to 6.

11. The article of claim 10 , where Y is a C 2 to C 10 linear alkylene or a structure of formulas (II), (III), or (IV):

where R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are independently —CH 2 —(CH 2 CH 2 O) a (CH 2 CH(CH 3 )O) b —, a direct bond to A, or a direct bond to [(CH 2 ) x -Q-Z-(CH 2 ) y -R f ]; wherein a and b are defined as above.

12. The article of claim 10 , wherein the composition comprises (a) the coating base in an amount of from about 95 to 99.98% and (b) the fluorinated ester compound in an amount of from about 0.02 to 5% by weight, based on the total weight of (a) and (b).

13. The article of claims 10 , where A is OH or C 1 to C 4 alkyl.

14. The article of claims 10 , where the coating base is a water-dispersed coating in the form of an aqueous acrylic latex paint.

15. The article of claims 10 , where the substrate is selected from the group consisting of wood, metal, wallboard, masonry, concrete, fiberboard, and paper.