Assertion: formaldehyde | /r/HasProperty | 1.0:(0.4-0.5):(0.1-0.3
Facets:
Source sentences:
text: Process according to invention is implemented via condensation of urea-formaldehyde concentrate with urea on heating first in neutral or low-alkaline medium and then in acidic medium in presence of catalytic additive composed of formaldehyde, sodium hydroxide, and sulfuric acid at molar ratio 1.0:(0.4-0.5):(0.1-0.3), respectively, followed by co-condensation of formed product with additional amount of urea in neutral or low-alkaline medium at initial and final urea-to-formaldehyde molar ratios 1.0:(1.9-2.1) and 1.0:(1.1-1.6), respectively.