Removal of metallic coatings from polymeric substrates

Details Removal of metallic coatings from polymeric substrates Removal of metallic coatings from polymeric substrates

1991-05-06

1992-07-07

Morris, Theodore

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 3, 134 10, 134 15, 134 2217, 134 29, 252135, 252156, B08B 308, C11D 706, C11D 708, C23F 400

Patent

active

051279584

ABSTRACT:
A method for removing metallic coatings from polymeric substrates is provided. The method comprises contacting a metallic-coated polymeric substrate with an aqueous solution consisting essentially of from about 0.75 to about 11.25 weight percent trisodium phosphate and from about 0.75 to about 11.25 weight percent of an alkali metal hydroxide for a period of time effective to remove the metallic coating and produce a polymeric substrate substantially free of metal constituents and binder materials. The polymeric substrate and the metal constituents present in the metallic coating are recovered and reclaimed. A composition for removing the metallic coating from a metallic-coated polymeric substrate is also provided.

REFERENCES:
patent: 3099584 (1963-07-01), Walsh
patent: 3553144 (1971-01-01), Murphy
patent: 4392889 (1983-07-01), Grout
patent: 4610728 (1986-09-01), Natesh et al.
patent: 4612057 (1986-09-01), Buser et al.
patent: 4799954 (1989-01-01), Hochberg

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