Solvent borne coating composition having improved brushability and process for producing coatings therefrom

1. A solvent borne brushable coating composition comprising:

(a) a crosslinkable component comprising one or more polymers having two or more crosslinkable groups;

(b) a crosslinking component comprising one or more crosslinking agents having crosslinking groups; and

(c) about 2 weight percent to about 50 weight percent of drying oil comprising linseed oil, tung oil, poppy seed oil, perilla oil, walnut oil or a combination thereof added to said crosslinkable component, crosslinking component, or to said crosslinkable and crosslinking components, said weight percentages being based on the total weight of said composition and wherein a layer of a pot mix resulting from mixing of said crosslinkable and crosslinking components when applied over a substrate has a brush drag in the range of from 1 to 3 under ASTM test D4958.

2. The brushable coating composition of claim 1 wherein said drying oil is linseed oil.

3. The brushable coating composition of claim 1 wherein said drying oil comprises in the range of from about 52% to about 55% of triply unsaturated α-linolenic acid, about 7% to about 8% of palmitic acid and about 3% to about 5% of stearic acid, all weight percentages based on the total weight of drying oil.

4. The brushable coating composition of claim 1 wherein said polymer is hydroxyl functional (meth)acrylic polymer.

5. The brushable coating composition of claim 4 wherein said polymer has a glass transition temperature (Tg) of in a range of from about −40° C. to about 60° C.

6. The coating composition of claim 1 wherein said crosslinker is aliphatic polyisocyanate, cycloaliphatic polyisocyanate, aromatic polyisocyanate or a combination thereof.

7. The coating composition of claim 1 wherein a coating upon cure of said layer has a gloss that is in the range of about 80 to about 95 when measured at 60 degree angle.

8. The coating composition of claim 1 comprising one or more organic solvents chosen from aromatic hydrocarbons, ketones, esters and a combination thereof.

9. The coating composition of claim 1 , wherein said crosslinkable component and said crosslinking component are stored in separate containers.

10. The coating composition of claim 9 wherein said containers are hermetically sealed to prevent exposure to air while stored.

11. The coating composition of claim 1 comprising acrylic non-aqueous dispersed resins.

12. The coating composition of claim 1 , wherein said composition is a refinish automotive paint.

13. A process for producing a coating on a substrate, wherein the process comprises the steps of:

(a) mixing a crosslinkable component of a solvent borne coating composition with a crosslinking component of said composition to form a potmix, wherein said crosslinkable component comprises one or more polymers having two or more crosslinkable groups and wherein; said crosslinking component comprises one or more crosslinking agents having crosslinking groups; and said composition comprises about 2 weight percent to about 50 weight percent of drying oil comprising linseed oil, tung oil, poppy seed oil, perilla oil, walnut oil or a combination thereof, said weight percentages being based on the total weight of said composition;

(b) brushing a layer of said potmix over said substrate, wherein said potmix has a brush drag in the range of from 1 to 3 when measured under ASTM test D4958;

(c) curing said layer under ambient conditions to form a coating on said substrate, said coating has a gloss in the range of about from about 80 to about 95 when measured at 60 degrees.

14. The process of claim 13 , wherein said composition is a refinish automotive paint.

15. The process of claim 13 wherein said substrate is an automotive body.