Patent ID: 8969268
Filing Date: 2015-03-03
Classification: C10M,C10N

Abstract:
1. A process for the preparation of multifunctional additive for aqueous lubricants which comprises: (i) copolymerizing glycerolmonomaleate with comonomer selected from the group consisting of acrylamide and vinyl acetate in a molar ratio in the range of 1:1 to 1:3 in a solvent selected from water or dimethyl formamide along with ceric/thiourea redox initiator or benzoylperoxide at a temperature in the range of 50-70° C. under nitrogen flushing and stirring condition for a period of 5-8 hrs to obtain polymer, (ii) optionally polymerizing glycerolmonomaleate with poly acrylamide, in a ratio of 1:5.26 to 1:4.26 wt basis in water at a temperature in the range of 60-90° C. at the pH of the medium 2-3 under nitrogen flushing and stirring condition for a period of 5-8 hrs to obtain polymer, (iii) precipitating the polymer obtained in step i) and ii) in methanol or isopropyl alcohol to obtain desired product.