摘要：

The invention relates to a method for the production of water-insoluble urea/thiourea/formaldhyde (UF) condensed composition comprising admixing thiourea, 5 to 20 weight percent in urea/thiourea mixture, with sufficient formaldehyde so that its molar ratio to urea components is 0.8 to 1.2, and a resin precondensate viscosity of 400 to 600 cps is obtained. The invention additionally relates to water-insoluble urea/thiourea/formaldehyde condensed compositions. A coating and/or paper products comprising the urea/thiourea/formaldehyde condensed compositions is also disclosed.

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