Process for productin of 4,4'-thiobis phenols
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United States of America Patent
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Jun 7, 1994
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N/A
app pub date -
Jul 28, 1993
filing date -
Feb 5, 1992
priority date (Note) -
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Abstract
Thiobisphenols of the formula: ##STR1## wherein X is 1, 2, 3 or 4 and R.sub.1 and R.sub.2 are straight or branch-chained alkyl group of 1 to 10 carbon atoms, which are useful as antiodiants and synergists for antioxidants, are prepared by reaction of a 2,6-dialkylphenol with an excess of sulfur in a solvent comprising a mixture of an alcohol and water wherein the solvent contains from 10 to 50 wt. % of water.
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