r-1140 fast curing solventless impregnating resin consists of thermal-resistant unsaturated polyester, epoxy resin, styrene. it is mono-component solventless impregnating resin. its thermal endurance is grade f (grade 155). 1140 impregnating resin exhibits following characteristics: the curing is faster, the stability of storage is good , the mechanical strength of curing article is high, the bonded coil is firm , electrical insulating properties is excellent , can be b grade and f grade in common use . it is suitable for insulating treatment of various winding of electrical machinery or appliance of b grade or f grade. the 1140 impregnating resin is conform to technical specification of f grade solventless impregnating resin for y2 series of electrical machinery use .