Patent ID: 6075088
Filing Date: 2000-06-13
Classification: C09D

Abstract:
High-solids air-drying or semi-drying alkyd paints comprising:(i) as binder, a conventional air-drying or semi-drying long-oil or medium-oil alkyd resin(ii) as reactive diluent, an oligomer prepared by the reaction of a polyol, fatty acids and a polyisocyanate, the polyol having between 3 and 10 free alcohol groups and at most one ether group, the fatty acids having an iodine index greater than 125 and being used in an amount of from 0.70 to 0.80 mole per mole equivalent of alcohol group in the polyol, the polyisocyanate containing no copolymerisable C--C bond and being used in an amount of from 0.20 to 0.10 mole equivalent of isocyanate per mole equivalent of alcohol group in the polyol, such as to obtain an isocyanate number equal to zero, acid number below 10, hydroxyl number between 10 and 30 and a viscosity comprised between 1 and 30 dPa.s;(iii) at least one drier; and(iv) pigments, fillers and auxiliaries in sufficient amounts to limit VOCs to at most 250 g/l.