PURPOSE: To obtain the title compositions which can be alternate solvents of those destroying the ozone layer, without fluctuation of composition and ozone- layer-destroying effects, being chemically stable, by using 3,3-dichloro-1,1,1,2,2- pentafluoropropane and acetone as effective components.
CONSTITUTION: The title composition is obtained by using 3,3-dichloro-1,1,2,2- pentafluoropropane (R225Ca) and acetone as effective components. The mixing ratio of the effective component is 60-99weight% R225Ca and 1-40weight% acetone, preferably weight% R225 76 and 24weight% acetone. However, it is possible to add and mix other components according to applications for improvement of stability, detergency, etc. The compositions can favorably be used as the detergents for printed circuit boards, integrated circuits, ceramics, oils, or as a dehydrating agent, solvents or many other applications.
USAMI YOKO
KAMIMURA TORU
