Preparation of aqueous nonwoven binders of low formaldehyde emission on curing based on urea, formaldehyde and glyoxal
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United States of America Patent
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May 21, 1991
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N/A
app pub date -
May 2, 1989
filing date -
May 7, 1988
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Expired
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Abstract
Aqueous nonwoven binders that give reduced formaldehyde emission on curing are based on condensation products of urea or derivatives thereof, formaldehyde and glyoxal in a molar ratio, based on the solid binder, of from 1.5 to 2.5 moles of formaldehyde and from 0.1 to 0.5 mole of glyoxal per mole of the total urea used.
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