VISCOSITY ADJUSTMENT OF AMMONIATED UREA-FORMALDEHYDE RESIN COMPOSITIONS BY ADDITION OF DRIED UREA-FORMALDEHYDE POWDER

摘要

The invention relates to a composition of matter comprising an ammoniated urea-formaldehdye resin and a water soluble dried urea-formaldehyde resin powder wherein the ratio of ammoniated to dried urea-formaldehyde resins is from approximately 20:1 to 1:20 by weight. A process for adhering paper to a lignocellulosic substrate using the composition of matter is provided. By this invention, high solids, shelf stable adhesive compositions containing low levels of free formaldehyde are provided which, when catalyzed, will cure under heat and/or pressure, to adhere decorative paper to a lignocellulosic substrate.