Abstract: This invention provides methods for producing furfural-urea resins and adhesives. The includes dissolving urea in hot water to produce a hot aqueous solution, mixing furfural with the aqueous solution, adding an acid catalyst such as maleic anhydride to the furfural containing aqueous solution upon which a resinification reaction begins immediately. The resinification reaction is quenched by cooling to a pre-selected temperature to produce a resin or adhesive.

Abstract: This invention provides methods for preparing mixtures of styrene and maleic anhydride co-monomer, applying that mixture to the surface of a solid porous substance like wood, allowing the mixture to penetrate the surface zone of the material such as wood and causing it to quickly cure in the surface zone of the material. The keys are the low viscosity of the mixture that causes it to penetrate quickly and well, and its reactivity that causes it to cure before it either evaporates or becomes too dispersed within the material. The polymer reinforcement and hardening is therefore effectively restricted to the surface zone or shell. This produces a reinforced, hardened, protective shell around the porous material.

Abstract: This invention is a method preparing solutions or mixtures of oligimer or polymer in a solution of polymerizable monomer, applying that solution to the surface of a solid porous substance like wood, heating to drive the mixture into the surface zone of the substance and causing the polymerizable monomer to cure. This produces a reinforced, hardened, protective shell around the porous substance.

Abstract: This invention provides methods of furfural-urea modification of wood, and more particularly the present invention relates to the impregnation, and polymerization of, furfural-urea formulations under conditions of high weight percent gain (WPG) into wood. Wood is modified by impregnating wood first with furfural, thereafter impregnating the wood with a solution of urea, water and an acidic catalyst for polymerizing the mixture of furfural and urea in the wood. The wood is then dried and cured at the same time.

Abstract: This invention provides water-based furfural-urea resins for impregnation of same into wood in order to impart decay, mold, marine borer and termite resistance and improve moisture resistance and mechanical properties. The waterborne wood modification composition for impregnation into wood, includes water, furfural, urea, an acidic catalyst, and a buffer present in an amount to give a pH in a range from about 2.96 to about 5.13.

Abstract: This invention provides methods for producing furfural-urea resins and adhesives. The includes dissolving urea in hot water to produce a hot aqueous solution, mixing furfural with the aqueous solution, adding an acid catalyst such as maleic anhydride to the furfural containing aqueous solution upon which a resinification reaction begins immediately. The resinification reaction is quenched by cooling to a pre-selected temperature to produce a resin or adhesive.