| 摘要 |
1321375 Cleaning solvent IMPERIAL CHEMICAL INDUSTRIES Ltd 21 Feb 1972 [3 March 1971] 5920/71 Heading C5D A solvent, useful for removing soldering flux residues from printed circuit boards, comprises an azeotrope-forming mixture of a trichloropentafluoropropane (e.g. the 1,1,3-trichloroisomer) and a C 1-4 alkanol (e.g. methanol, ethanol, n-propanol, isopropanol, n-butanol or tert.-butanol). |
