Method of dispersing a pigment

A pigment dispersion comprising

• at least one pigment which has been subjected to an action to decrease the average particle size of the pigment in the presence of an amine functional cellulose ester, the amine functional cellulose ester comprising
• at least one repealing unit of the structure:
• wherein R1, R2, and R3 are selected independently from the group consisting of hydrogen, R4C═O, and
• wherein
• at least one of R1, R2, and R3 is hydrogen,
• at least one of R1, R2, and R3 is R4C═O, and
• at least one of R1, R2, and R3 is
• R4 is selected, from the group consisting of C1-C20 alkyl groups, C1-C20 phenyl groups, C1-C20 napthyl groups, and C1-C20 alkenyl groups,
• R6 is selected from the group consisting of H and groups having at least one secondary amine group, tertiary amine group, and mixtures thereof, and
• L is a divalent linking group having from 1, to 20 carbons atoms and from 0 to 10 heteroatoms selected from the group consisting of oxygen, nitrogen, and mixtures thereof.

A method of making a coating composition having an improved appearance, the method comprising

• providing at least one pigment dispersion comprising at least one pigment which bas been subjected to an action to decrease the average particle size of the pigment in the presence of an amine functional cellulose ester, the amine functional cellulose ester comprising at least one repeating unit of die structure:
• wherein R1, R2, and R3 are selected independently from the group consisting of hydrogen, R4C═O, and
• wherein
• at least one of R1, R2, and R3 is hydrogen,
• at least one of R1, R2, and R4 is R4C═O, and
• at least one of R1, R2 and R3 is
• R4 is selected from the group consisting of C1-C20 alkyl groups, C1-C20 phenyl groups, C1-C20 napthyl groups, and C1-C20 alkenyl groups,
• R6 is selected from the group consisting of H and groups having at least one secondary amine group, tertiary amine group, and mixture thereof, and
• L is a divalent linking group having from 1 to 20 carbons atoms and from, 0 to 10 heteroatoms selected from the group consisting of oxygen, nitrogen, and mixtures thereof, and
• incorporating the pigment dispersion with at least one binder to provide a coating composition.

A method of improving the appearance of a cured pigment coating, comprising

• applying a coating comprising at least one pigment dispersion comprising
• at least one pigment which has been subjected to an action to decrease the average particle size of the pigment in the presence of an amine functional cellulose ester, the amine functional cellulose ester comprising
• at least one repeating unit of the structure:
• wherein R1, R2, and R3 are selected independently from the group consisting of hydrogen, R4C═O, and
• wherein
• at least one of R1, R2, and R3 is hydrogen,
• at least one of R1, R2, and R3 is R4C═O, and
• at least one of R1, R2, and R3 is
• R4 is selected from the group consisting of C1-C20 alkyl groups, C1-C20 phenyl groups, C1-C20 naphthyl groups, and C1-C20 alkenyl groups,
• R6 is selected form the group consisting of H and groups having at least one secondary amine group, tertiary amine group, and mixtures thereof, and
• L is a divalent linking group having from 1 to 20 carbons atoms and from 0 to 10 heteroatoms selected from the group consisting of oxygen, nitrogen, and mixtures thereof.

A coating comprising

• at least one pigment dispersion comprising
• at least one pigment which has been subjected to an action to decrease the average particle size of the pigment in the presence of an amine functional cellulose ester, the amine functional cellulose ester comprising
• at least one repeating unit of the structure.
• wherein R1, R2, and R3 are selected independently from the group consisting of
• hydrogen, R4C═O, and
• wherein
• at least one of R1, R2, and R3 is hydrogen,
• at least one of R1, R2, and R3 is R4C═O, and
• at least one of R1, R2, and R3 is
• R4 is selected from the group consisting of C1-C20 alkyl groups, C1-C20 phenyl groups, C1-C20 napthyl groups, and C1-C20 alkenyl groups,
• R6 is selected from the group consisting of H and groups having at least one secondary amine group, tertiary amine group, and mixtures thereof, and
• L is a divalent linking group having from 1 to 20 carbons atoms and from 0 to 10 heteroatoms selected from the group consisting of oxygen, nitrogen, and mixtures thereof.