UNSATURATED MALEIC ACID BASED MONOMER FOR OLIGOESTERS AND ALKYDS AND PROCESS FOR PREPARING THEREOF Russian patent published in 1995 - IPC

FIELD: organic chemistry. SUBSTANCE: an unsaturated maleic acid based monomer for oligoesters and alkyds having (mole): 91.0 97.24 maleic acid monoglycolic ester; 2.76-9.0 totally glycol, glycol being ethylene or diethylene or propylene glycol, or mixtures thereof. The yield is 99.5% iodomatric scale color is 1, the acid number is 300-340 mg KOH/g; the saponification number is 500-700 mg KOH/g. The viscosity value as determined by the VZ-4 viscosimeter is 227-442 cp. Reaction conditions: reagent 1: maleic anhydride; reagent 2: glycol, 60-100 C. The molten anhydride is mixed with preheated glycol, the mixture is then kept till the temperature begins decreasing spontaneously. EFFECT: more efficient preparation process. 3 cl, 4 tbl