Aromatic dispersant composition

A polymer comprising a polymer chain having at least one fused aromatic imide pendant group, wherein the polymer is represented by formula (1):

• wherein each variable is independently
• R1 is a substituent on Q ring in any position available for bonding to a substituent group and R1 is represented by one or more of —H, or an electron withdrawing group chosen from a halogen, a nitrile, a carbonyl group, a nitro group, a sulphamoyl group, a sulphonate group, a hydroxy group, or an amino group;
• R′ is a —H, an optionally-substituted alkyl containing 1 to 20 carbon atoms, and the substituents is hydroxyl or halo, or mixtures thereof;
• R2 is a C1 to C20 hydrocarbylene group or a C1 to C20 hydrocarbonylene group when R2 contains more than 2 carbon atoms, the hydrocarbylene group or hydrocarbonylene group is linear or branched or mixtures thereof;
• R3 is a H or C1-50-optionally substituted hydrocarbyl group that bonds to a terminal oxygen atom of the polymer chain forming a terminal ether or terminal ester group and may or may not contain a group capable of polymerization such as a vinyl group, or C1-50-hydrocarbonyl group that bonds to the oxygen atom of the polymer chain forming a terminal ester group or terminal urethane group and may or may not contain a group capable of polymerization;
• Pol is a homopolymer chain or a copolymer chain, wherein the polymer chain is selected from the group consisting essentially of a Poly(ether), Poly(ester), Poly(ester amide), Poly(amide), Poly(alkylene), and mixtures thereof;
• u is 1 to 3;
• v is 1 to 2;
• w is 1 to 3;
• v is 2 when W is Nitrogen;
• v is 1 when W is Oxygen, Sulphur, >NG;
• G is a hydrogen or a hydrocarbyl group containing 1 to 200 carbon atoms;
• and
• Q is a fused aromatic ring containing 4n+2 π-electrons, wherein n=2, and Q is bonded to the imide group in such a way to form a 5 or 6 membered imide ring.