The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 27, 1999
Filed:
Nov. 11, 1998
Robert A Berger, Center Line, MI (US);
Enthone-OMI, Inc., Warren, MI (US);
Abstract
A method for removal of an organic film from a metal substrate comprising: (a) preparing a stripping bath comprising a mixture of a salting-out agent, a carboxylic acid, and an organic solvent, said organic solvent in a concentration at about or greater than its solubility limit in water and having a solubility limit of 1/2% to 50% by weight in water, wherein said organic solvent is selected from the group consisting of butoxy ethanol, hexoxy ethanol, butoxy-2-ethoxy ethanol, dibasic ester, 2-ethyl hexyl alcohol, straight chain alcohol having from 6 to 16 carbons, N-methyl-pyrrolidone, and mixtures thereof, and said carboxylic acid is selected from the group consisting of hydroxy carboxylic acids, lactic acid, glycolic acid, citric acid, malic acid, tartaric acid, and mixtures thereof, and said salting-out agent is selected from a group consisting of glucoheptonate, gluconate, and mixtures thereof, and (b) immersing said metal substrate in the stripping bath of step (a) for a predetermined period of time to loosen said organic film and thereby remove said organic film from said metal substrate. The stripping bath mixture can be used for removal of an electrophoretic coating from a metal substrate.