Multi-component coating composition comprising an anhydride containing polymer, a glycidyl component and an acid functional component

A multi-package coating composition which cures to a hard, glossy and tack free finish, comprising 20-80% by weight of reactive binder components and 80-20% by weight of an organic liquid carrier;

• wherein the binder contains a maximum of 25%, based on the weight of binder, of aromatic vinyl, and the binder comprises;
• (a) 25-90% by weight, based on the weight of binder, of an anhydride acrylic polymer having at least two reactive anhydride groups and comprises polymerized monomers of an ethylenically unsaturated anhydride or an ethylenically unsaturated dicarboxylic acid and polymerized monomers selected from the group consisting of alkyl methacrylate, alkyl acrylate and any mixtures thereof, wherein the alkyl groups have 1-8 carbon atoms and the polymer has a weight average molecular weight of about 2,000-50,000;
• (b) 5-50% by weight, based on the weight of the binder, of a glycidyl component having at least two reactive glycidyl groups;
• (c) 5-50% by weight, based on the weight of the binder, of an acid functional component which is either a substantially saturated acid functional polymer or a monomeric compound having both an acid and hydroxyl functionality;
• and
• (d) 0.1-5% by weight, based on the weight of the binder, of a curing catalyst;
• wherein components (a), (b) and (c) are separate components and the cure occurs between said acid functional component (c) and/or anhydride component (a) and the glycidyl component (b).