ALDEHYDE SCAVENGERS AND METHODS FOR MAKING AND USING SAME
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United States of America Patent
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Aug 7, 2015
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Aug 7, 2014
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Aldehyde scavengers, binder compositions including the aldehyde scavengers, and methods for making and using same. The aldehyde scavenger can include a urea-formaldehyde resin having a formaldehyde to urea molar ratio of about 1.5:1 to about 2.2:1, a sulfite compound, an ammonium salt, free urea, and a liquid medium. The aldehyde scavenger can have a total formaldehyde to total urea molar ratio of about 0.3:1 to about 0.8:1. The aldehyde scavenger can include about 0.5 wt % to about 4 wt % of the sulfite compound and about 0.5 wt % to about 4 wt % of the ammonium salt, based on a combined weight of the urea-formaldehyde resin, the sulfite compound, the ammonium salt, the free urea, and the liquid medium. The binder compositions can include the aldehyde scavenger and one or more aldehyde-based resins.
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