PHENOL-FORMALDEHYDE AND LIGNIN PHENOL-FORMALDEHYDE ADHESIVE POLYMERS WITH CARBON BLACK, AND METHOD OF MAKING SAME
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United States of America Patent
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Jun 11, 2015
app pub date -
Feb 10, 2012
filing date -
Feb 11, 2011
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Abstract
Phenol-formaldehyde and lignin-phenol formaldehyde adhesive polymers with improved properties are disclosed, as well as the method of production therein. The method comprises providing at least one phenolic compound at least one formaldehyde compound, an alkali metal hydroxide, water and at least one carbon black; mixing the at least one phenolic compound, the at least one formaldehyde compound, the alkali metal hydroxide, the water and the carbon black to produce a methylolation medium at a pH of about 10 or less; maintaining the medium at a methylolation temperature to produce a methylolated medium reacting with the water predominantly; and increasing the temperature of the methylolated medium to produce the phenol-formaldehyde polymer via a condensation reaction.
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