Preparation of rosinated medium alkyd resin as a binder for paint and coating technology

Alcoholysis-polyesterification method was used in the study of consumption of dehydrated castor oil and linseed oil in the formulation of rosinated medium alkyd resins. The extracted oil with the iodine number for castor oil is 86-90 and for linseed oil is 175-180 were applied in the preparation of middle alkyd resins and the physicochemical characterization indicated it is semi-drying in nature Three grades of alkyds were formulated at 40%(I)-short alkyd resins, 45% (II)-middle alkyd resin and 55%(III)-long alkyds. The present work deal with the conventional method for the preparation of middle alkyd resin of dehydrated castor oil and linseed oil rosinated medium alkyd resins with 52% solid. The prepared resin was extensively used as a binder in the field of solvent based enamels and paints coating technology.