Abstract: A coating composition comprising a solution in a volatile organic solvent of: i) a polyisocyanate, ii) a hydroxyl functional polymer, the polyisocyanate comprising a mixture of an aliphatic polyisocyanate having an average isocyanate functionality of 2.5 or more, and diphenylmethane diisocyanate.

Abstract: An aqueous coating composition comprising a dispersion in an aqueous medium of an acrylic addition polymer having carboxyl groups in which a proportion of the carboxyl groups are derived from a carboxyl functional chain transfer agent, the composition also comprising a base in an amount sufficient to at least partially neutralise the carboxyl groups on the polymer.

Abstract: A coating composition comprising a solution in a volatile organic solvent of: a polyisocyanate, a reactive diluent having amine groups or blocked amine groups, and a hydroxyl functional compound which is a polyester having secondary hydroxyl groups.

Abstract: A process for refinishing a motor vehicle byselecting and mixing two or more pigmented base paints from a series of master colors, each base paint having a hydroxyl functional polymer selected from the group consisting of an acrylic addition polymer, a polyester polymer and mixtures thereof, having a number average molecular weight of 600 to 10 000 and a hydroxyl value of 5 to 500, andadding a hardener of a polyisocyanate crosslinker to react and crosslink with said hydroxyl functional polymer in each base paint to form a thermosetting pigmented composition, the improvement in the process comprising;adding a catalyst mixture of a tin catalyst and a polyfunctional thiol having at least three thiol groups per molecule in which the ratio of the number of moles of thiol groups from the polyfunctional thiol to the number of moles of tin from the tin catalyst is 1:1 to 500:1, to form a catalyzed pigmented coating composition having a more constant irrespective of the pigments contained in the two or more basic pain