The present invention provides a process for preparing an oil extended rubber, in which an effect on environments can be taken into consideration, provision for the future decrease of petroleum supply can be satisfied, and further, strength is excellent without molecular breakage, an oil extended rubber obtained by the preparation process, and a tire using the oil extended rubber. A process for preparing an oil extended rubber, comprising (a) a step of preparing an oil-in-water type emulsion by emulsifying a vegetable oil having an iodine value of not less than 135 with a surfactant, (b) a step of mixing said emulsion and a modified natural rubber latex, and then aging the mixture, and (c) a step of coagulating the mixture obtained in the step (b) to obtain a lump of a rubber, an oil extended rubber obtained by the preparation process, and a rubber composition for a tire and a tire which use the oil extended rubber.
展开▼
