Waterborne coating composition useful for promoting adhesion to plastic surfaces

1. A coating on a plastic surface wherein:

The coating formed from a waterborne coating composition prepared from a mixture consisting essentially of:

at least one chlorinated polyolefin resin in an amount effective to promote adhesion of the coating to a plastic surface,

at least one urethane acrylic hybrid resin in an amount effective to counteract tackiness of the chlorinated polyolefin resin and promote rapid drying of the coating,

at least one coalescent solvent,

at least one surfactant,

at least one of:

a clay,

a hydrophobically-modified ethoxylated urethane, or

a hydrophobically-modified alkali swellable emulsion;

at least one base,

at least one propanediol, and

water, and

wherein the chlorinated polyolefin resin is present in the mixture at about 35.0 to 45.0 wt % based on total dry resin solids content; and

wherein the urethane acrylic hybrid resin is present in the mixture at about 55.0-65.0 wt % based on total dry resin solids content.

2. The coating according to claim 1 wherein the coating:

has a thickness of from about 0.01 to about 2.5 mils.

3. A coated plastic component, comprising:

a plastic substrate having a surface;

an adhesion promoting coating disposed on the surface of the plastic substrate, the coating formed from a waterborne coating composition prepared from a mixture consisting essentially of:

at least one chlorinated polyolefin resin in an amount effective to promote adhesion of the coating to a plastic surface,

at least one urethane acrylic hybrid resin in an amount effective to counteract tackiness of the chlorinated polyolefin resin and promote rapid drying of the coating, and

at least one coalescent solvent;

at least one surfactant;

at least one of:

a clay,

a hydrophobically-modified ethoxylated urethane, or

a hydrophobically-modified alkali swellable emulsion;

at least one base;

at least one propanediol; and

water; and

wherein the chlorinated polyolefin resin is present in the mixture at about 35.0 to 45.0 wt % based on total dry resin solids content;

wherein the urethane acrylic hybrid resin is present in the mixture at about 55.0-65.0 wt % based on total dry resin solids content.

4. The coated plastic component according to claim 3 further comprising an automotive paint on the adhesion promoting coating, wherein the plastic substrate is a plastic automotive component.

5. The coated plastic component according to claim 4 wherein:

the plastic automotive component is a bumper, a door, a fender, a body panel, a side-panel, a hood, a trunk, or a roof;

the adhesion promoting coating is on an exterior surface thereof;

and the automotive paint is a waterborne automotive paint.

6. The coated plastic component according to claim 4 wherein the plastic automotive component is formed at least partially from a thermoplastic olefin.

7. The coated plastic surface according to claim 6 wherein the plastic automotive component is a bumper.

8. A method of painting a plastic automotive component, comprising:

applying, to at least a portion of a surface of a plastic automotive component, a waterborne coating composition to form an adhesion-promoting coating, the waterborne coating composition prepared from a mixture consisting essentially of:

at least one chlorinated polyolefin resin in an amount effective to promote adhesion of the coating to a plastic surface,

at least one urethane acrylic hybrid resin in an amount effective to counteract tackiness of the chlorinated polyolefin resin and promote rapid drying of the coating, and

at least one coalescent solvent;

at least one surfactant;

at least one of:

a clay,

a hydrophobically-modified ethoxylated urethane, or

a hydrophobically-modified alkali swellable emulsion;

at least one base;

at least one propanediol; and

water; and

wherein the chlorinated polyolefin resin is present in the mixture at about 35.0 to 45.0 wt % based on total dry resin solids content; and

wherein the urethane acrylic hybrid resin is present in the mixture at about 55.0-65.0 wt % based on total dry resin solids content; and

painting the coated surface of the plastic automotive component with an automotive paint.

9. The method according to claim 8 , further comprising:

cleaning at least a portion of the surface of the plastic automotive component to remove dust, debris and contaminants from the surface of the plastic automotive component; and

applying the waterborne coating composition on a cleaned portion of the surface.

10. The method according to claim 8 , further comprising drying the adhesion-promoting coating for about 20 minutes or less under ambient conditions prior to painting the coated surface with an automotive paint.

11. The method according to claim 8 , further comprising heating the adhesion-promoting coating for less than about 5 minutes.

12. The method according to claim 8 wherein applying the waterborne coating composition comprises spraying, brushing or rolling.

13. A method of making a waterborne coating composition for forming a coating that promotes adhesion of paint to plastic surfaces, comprising:

mixing:

at least one chlorinated polyolefin resin in an amount effective to promote adhesion of the coating to a plastic surface, and

at least one urethane acrylic hybrid resin in an amount effective to counteract tackiness of the chlorinated polyolefin resin and promote rapid drying of the coating

at least one coalescent solvent;

at least one surfactant;

at least one of:

a clay,

a hydrophobically-modified ethoxylated urethane, or

a hydrophobically-modified alkali swellable emulsion;

at least one base;

at least one propanediol; and

water; and

wherein the chlorinated polyolefin resin is present in the mixture at about 35.0 to 45.0 wt % based on total dry resin solids content;

wherein the urethane acrylic hybrid resin is present in the mixture at about 55.0-65.0 wt % based on total dry resin solids content.

14. A waterborne coating composition for forming a paint adhesion-promoting coating on a plastic surface, the waterborne coating composition prepared from a mixture consisting essentially of:

at least one chlorinated polyolefin resin in an amount effective to promote adhesion of the coating to a plastic surface;

at least one urethane acrylic hybrid resin in an amount effective to counteract tackiness of the chlorinated polyolefin resin and promote rapid drying of the coating;

at least one coalescent solvent;

at least one surfactant;

at least one of:

a clay,

a hydrophobically-modified ethoxylated urethane, or

a hydrophobically-modified alkali swellable emulsion;

at least one base;

at least one propanediol; and

water; and

wherein the chlorinated polyolefin resin is present in the mixture at about 35.0 to 45.0 wt % based on total dry resin solids content;

wherein the urethane acrylic hybrid resin is present in the mixture at about 55.0-65.0 wt % based on total dry resin solids content, and

wherein the coating formed by the waterborne coating composition is ready to have a paint layer applied thereon after drying for about 20 minutes or less under ambient conditions.

15. A waterborne coating composition for forming a paint adhesion-promoting coating on a plastic surface, the waterborne coating composition prepared from a mixture consisting essentially of:

at least one chlorinated polyolefin resin in an amount effective to promote adhesion of the coating to a plastic surface;

at least one urethane acrylic hybrid resin in an amount effective to counteract tackiness of the chlorinated polyolefin resin and promote rapid drying of the coating;

at least one coalescent solvent;

at least one surfactant;

at least one of:

a clay,

a hydrophobically-modified ethoxylated urethane, or

a hydrophobically-modified alkali swellable emulsion;

at least one base;

at least one propanediol; and

water; and

wherein the chlorinated polyolefin resin is present in the mixture at about 35.0 to 45.0 wt % based on total dry resin solids content; and

wherein the urethane acrylic hybrid resin is present in the mixture at about 55.0-65.0 wt % based on total dry resin solids content.

16. The waterborne coating composition according to claim 15 wherein the mixture comprises a coalescent solvent comprising an ethylene glycol derivative and an alcohol ester.

17. The waterborne coating composition according to claim 15 wherein the surfactant is a surfactant blend comprising a wetting agent and a leveling agent.