Coating composition and articles made therefrom

1. An aqueous dispersion comprising the melt blending product of:

(a) from 50 to 99 percent by weight of one or more polyethylene terephthalate resins, based on the total solid content of the dispersion;

(b) from 1 to 50 percent by weight of one or more stabilizing agents comprising at least one second polyester, based on the total solid content of the dispersion, wherein said second polyester (i) has a carboxylic acid group and an acid number equal to or greater than 15, based on the solid content of the second polyester; or (ii) is a self-dispersing sulfopolyester;

(c) optionally one or more neutralizing agents; and

(d) from 15 to 90 percent by weight of water, based on the total weight of the dispersion;

wherein said dispersion has a solid content of 10 to 85 percent, based on the total weight of the dispersion, and wherein the volume average particle size of the dispersion is less than 5 microns.

2. A method for producing a aqueous dispersion comprising the steps of:

selecting one or more polyethylene terephthalate resins;

selecting one or more stabilizing agents comprising at least one second polyester, wherein said second polyester (i) has a carboxylic acid group and an acid number equal to or greater than 15, based on the solid content of the second polyester; or (ii) is a self-dispersing sulfopolyester;

optionally selecting one or more neutralizing agents;

melt-blending said one or more polyethylene terephthalate resins, one or more stabilizing agents in the presence of water and optionally one or more neutralizing agents;

thereby producing an aqueous dispersion having a solid content of 10 to 85 percent, based on the total weight of the dispersion, and wherein the volume average particle size of the dispersion is less than 5 microns.

3. A coating composition comprising:

the aqueous dispersion of claim 1 ;

optionally one or more cross-linking agents;

optionally one or more cross-linking catalysts;

optionally one or more solvents;

optionally one or more selected from the group consisting of a polyolefin dispersion, acrylic latex, alkyd dispersion, epoxy resin dispersion, polyurethane dispersion, vinyl acetate dispersion, and ethylene vinyl acetate dispersion; and

optionally one or more additives.

4. An aqueous dispersion comprising the melt blending product of: (a) from 50 to 99 percent by weight of one or more polyethylene terephthalate resins, based on the total solid content of the dispersion; wherein the polyethylene terephalate resin has a glass transition temperature (T g ) of at least 65° C., and an intrinsic viscosity of 0.5-1.0 Dl/g;

(b) from 1 to 50 percent by weight of one or more stabilizing agents comprising at least one second polyester, based on the total solid content of the dispersion, wherein said second polyester has a carboxylic acid group and an acid number equal to or greater than 20, based on the solid content of the second polyester;

(c) one or more neutralizing agents; and

(d) from 15 to 90 percent by weight of water, based on the total weight of the dispersion;

wherein said dispersion has a solid content of 10 to 85 percent, based on the total weight of the dispersion, and wherein the volume average particle size of the dispersion is less than 5 microns.

5. A coating layer comprising one or more film layers derived from the dispersion of claim 1 or the coating composition of claim 3 .

6. A coated article comprising:

one or more substrates;

at least one or more coating layers derived from the dispersion of claim 1 or the coating composition of claim 3 .

7. A method for making a coated article comprising the steps of:

selecting a substrate;

selecting the coating composition of claim 3 ;

applying said coating composition to at least one surface of said substrate;

removing at least a portion of the water from said the coating composition;

thereby forming one or more coating layers associated with said substrate; and

forming said coated substrate into a coated article.

8. A method for making a coated article comprising the steps of:

selecting a substrate;

forming said substrate into article;

selecting the coating composition of claim 3

applying said the coating composition to at least one surface of said article;

removing at least a portion of the water from said the coating composition;

thereby forming one or more coating layers associated with at least one surface of said article; and

thereby forming said coated article.

9. The aqueous dispersion of claim 1 , wherein said one or more polyethylene terephthalate resins have a glass transition temperature (T g ) of at least 30° C.

10. The coated article of claim 6 , wherein said substrate is a pre-coated substrate.

11. A can or coil coating composition comprising the coating composition of claim 3 .

12. A can or coil coating composition comprising

the aqueous dispersion of claim 4 ;

optionally one or more cross-linking agents;

optionally one or more cross-linking catalysts;

optionally one or more solvents;

optionally one or more selected from the group consisting of a polyolefin dispersion, acrylic latex, alkyd dispersion, epoxy resin dispersion, polyurethane dispersion, vinyl acetate dispersion, and ethylene vinyl acetate dispersion; and

optionally one or more additives.