Method for preparing high mole ratio and low free formaldehyde concentration

A process for preparing the urea-formaldehyde resin with high mole ration and low content of free formaldehyde includes such steps as proportionally providing urea and formaldehyde, proportionally adding modifier chosen from ammonia, ammonium dicarbonate and ammonium carbonate to formaldehyde soluti...

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Bibliographische Detailangaben

Hauptverfasser:	JUN LIN, WEICHENG JIAO, SILIANG FANG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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