PURPOSE: To provide the subject compositions each satisfying the excellent characteristics associated with conventional CFCs, usable as substitute of CFC and having outstanding characteristics as a solvent, etc., each comprising cyclopentane and at least one compound selected from R244cb, R235ca and R243cc.
CONSTITUTION: The objective compositions each comprising (A) at least one of fluorohydrocarbon selected from A1: 1-chloro-1,2,2,3-tetrafluoropropane (R244cb), A2: 3-chloro-1,1,2,2.3-pentafluoropropane (R235ca) and A3: 1,1- dichloro-1,2.2-trifluoropropane (R243cc) and (B) cyclopentane. Specifically, the objective azeotropic composition comprising 43wt.% of the component A1 and 57wt.% of the component B, 77wt.% of the component A2 and 23wt.% of the component B, or 30wt.% of the component A3 and 70wt.% of the component B, and the objective pseudoazeotropic composition comprising 23 to 99wt.% of the composition A1 and 1 to 77wt.% of the component B, 57 to 99wt.% of the component A2 and 1 to 43wt.% of the component B, or 10 to 99wt.% of the component A3 and 1 to 10wt.% of the component B. These compositions are free from composite variations, and can be used in the same way as conventional single CFC in their recycling.
SAMEJIMA SHUNICHI
KITAMURA TATEO
KAMIMURA TORU
