Patents
This invention particularly relates to cpmposition of metalworking fluids and process for its preparation based on vegetable oil such as Rice-bran oil (Oryza Sativa) and a biodegradable emulsifier to replace mineral oil and petroleum sulfonates. A vegetable oil based biodegradable metalworking fluid composition comprising of Oryza Sativa (Rice-bran oil), one emulsifier which is a sodium carboxylate of Rice-bran oil, oleate, sulfonate or mixtures thereof, an antioxidant, a fungicide, an extreme pressure additive, an antirust, a co-surfactant, a coupling agent and alkali component. The process comprising of removing of insoluble matter from the Rice-bran oil, addition of emulsifier, additives, coupling agent and co-surfactant, homogenizing the mixture followed by conditioning of the metal working fluid concentrate which can be used as emulsion in water.