Resols, process for their production and use
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United States of America Patent
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Apr 16, 2002
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app pub date -
Jul 17, 2000
filing date -
Aug 13, 1999
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Abstract
Resols modified with organic phosphonic acids and/or phosphinic acids or their alkali and/or alkaline-earth metal salts obtained by reacting phenolic compounds and aldehyde in an alkaline medium in a molar ratio of the phenolic compounds to the aldehyde in a range from 1:0.3 to 1:6, with the reaction mixture comprising 0.1 to 10 percent by weight of at least one organic phosphonic acids and/or phosphinic acids or their alkali and/or alkaline-earth metal salts.
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