Two-step process and composition for cleaning polished surfaces

Details Two-step process and composition for cleaning polished surfaces Two-step process and composition for cleaning polished surfaces

1979-10-01

1981-05-26

Caroff, Marc L.

Cleaning and liquid contact with solids

Processes

Using sequentially applied treating agents

134 40, 252153, 252170, 252171, B08B 308

Patent

active

042696305

ABSTRACT:
Optical components and highly-polished metal surfaces are cleaned with a first composition comprising 1,1,2-trichloro-1,2,2-trifluoroethane, isopropyl alcohol, dimethylformamide and 2-ethoxyethanol; then, while the surface is still wet with said first composition, a second composition, comprising at least about 85% 1,1,2-trichloro-1,2,2-trifluoroethane and containing less than 10 ppm of non-volatile residues, is applied to rinse the surface; and the surface is permitted to dry.

REFERENCES:
patent: 3340199 (1967-09-01), Clay et al.
patent: 3728269 (1973-04-01), Stephenson et al.
patent: 3806460 (1974-04-01), Mukai et al.
patent: 3903012 (1975-09-01), Brandreth
patent: 3904430 (1975-09-01), Tipping et al.
patent: 3957531 (1976-05-01), Tipping et al.

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