... . Also Preparation of N-methyl-pyrrolidone, N-vinyl pyrrolidone, and other pyrrolidone derivatives are used in preparation of ... vitamin B6, pesticides, herbicides and the role of various process solvents, plasticizers, lubricants, ... material for producing polyurethane artificial leather, polyurethane, elastomer and polyurethane sole glue. polyurethane elastomer are widely used ...