Removal of a polymeric coating from a polyester substrate

Details Removal of a polymeric coating from a polyester substrate Removal of a polymeric coating from a polyester substrate

1990-07-11

1991-10-08

Morris, Theodore

Cleaning and liquid contact with solids

Processes

Hollow work, internal surface treatment

252156, 252135, B08B 308, B08B 310, B08B 702

Patent

active

050551396

ABSTRACT:
A method for removing a polymeric coating, such as a polyvinyl dichloride, latex, synthetic latex and mixtures thereof from a polymeric-coated polyester substrate, is provided. The method comprises contacting the polymeric-coated polyester substrate with an aqueous solution containing at least about 0.75 weight percent trisodium phosphate and at least about 0.75 weight percent of an alkali metal hydroxide for a period of time effective to remove the polymeric coating and produce a polyester substrate substantially free of the polymeric coating. The polyester substrate and the polymeric constituents of the coating, once separated, can be recovered for recycling. A composition for removing the polymeric coating is also provided.

REFERENCES:
patent: 3308066 (1967-03-01), Murphy et al.
patent: 3766076 (1973-10-01), Murphy
patent: 3865628 (1975-02-01), Callahan et al.
patent: 3980587 (1976-09-01), Sullivan
patent: 4451264 (1984-05-01), Ulry et al.

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