Methods for removing ink from polymeric substrates
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United States of America Patent
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Jun 3, 1997
Grant Date -
N/A
app pub date -
Jul 27, 1995
filing date -
Jul 27, 1995
priority date (Note) -
Expired
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Abstract
The present invention is directed to a method for removing ink from a substrate containing at least one synthetic polymeric resin which comprises contacting the substrate with an aqueous solution of a glycol ether for a time sufficient, and under conditions effective, to remove the ink, wherein the glycol ether may be represented by Formula (I) R.sub.1 --O--R.sub.2 --OH (I) wherein R.sub.1 and R.sub.2 are independently selected from the group consisting of alkyl groups having from 1 to about 8 carbon atoms. This invention also pertains to improved methods for preparing de-inked recycled substrates employing the aqueous solution of glycol ether.
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