The present invention relates to a radiation-curable aqueous coating composition comprising a polyurethane A comprising as building blocks at least: (a) a polyisocyanate(s) containing at least one cyclic group, (b) a non-cyclic aliphatic diisocyanate(s) whereby the non-cyclic aliphatic group connecting the two isocyanate groups has 5 carbon atoms, and (c) a component(s) containing an isocyanate-reactive group(s), whereby the summed amount of (a) and (b) is 10 to 60 wt. %, relative to the total weight amount of components used to prepare the polyurethane A; and optionally radiation-curable diluent; whereby the weight ratio between (a) and (b) is in the range from 50:50 to 99:1; and whereby the ethylenically unsaturated bond concentration of the coating composition is in the range from 0.5 to 6 milliequivalents per g of polyurethane A and radiation-curable diluent.

Water-based stains comprise or consist essentially of a polysaccharide resin and a crosslinking agent such as an isocyanate. Upon evaporation of water, the polysaccharide undergoes crosslinking with the isocyanate component, developing water resistance so that it will not redissolve upon application of a water-based or oil-based clearcoat; as a result, lifting is minimized after a drying time of, e.g., two to six hours.

Water-based stains comprise or consist essentially of a polysaccharide resin and a crosslinking agent such as an isocyanate. Upon evaporation of water, the polysaccharide undergoes crosslinking with the isocyanate component, developing water resistance so that it will not redissolve upon application of a water-based or oil-based clearcoat; as a result, lifting is minimized after a drying time of, e.g., two to six hours.

Methods of preparing porous wood products for painting or finishing are described. The methods comprise applying to a porous wood product a UV-curable coating and curing by UV light the top UV curable coating to 70% to 95% cure, preferably 85% to 95% for spray-applied top UV curable coatings to produce a partially cured porous wood product. The methods typically further include the step of sanding the surface of the partially cured porous wood product and painting or staining, for example with a water-based or solvent-based stain or paint.

Methods of preparing porous wood products for painting or finishing are described. The methods comprise applying to a porous wood product a UV-curable coating and curing by UV light the top UV curable coating to 70% to 95% cure, preferably 85% to 95% for spray-applied top UV curable coatings to produce a partially cured porous wood product. The methods typically further include the step of sanding the surface of the partially cured porous wood product and painting or staining, for example with a water-based or solvent-based stain or paint.

Provided is a wood preservation treatment liquid including: an organic solvent containing 1-chloro-2,3,3,3-tetrafluoropropene; and a wood preservative.

Provided is a wood preservation treatment liquid including: an organic solvent containing 1-chloro-2,3,3,3-tetrafluoropropene; and a wood preservative.

A wood preservative composition and method for preserving wood by contacting wood with said composition comprising a polyurethane polymer, non-aqueous solvents, and a wood preservative active.

A wood preservative composition and method for preserving wood by contacting wood with said composition comprising a polyurethane polymer, non-aqueous solvents, and a wood preservative active.

An additive for a water-based wood stain includes a polymeric particle including a polymer that includes a repeating unit formed from a compound having the formula X-L.sup.1-A, wherein X is a substituted or unsubstituted (C.sub.2-C.sub.8)alkenyl containing one or more carbon-carbon double bonds, L.sup.1 is a bond, C(O)O, OC(O), or a substituted or unsubstituted (C.sub.1-C.sub.10)alkylene interrupted by 0, 1, 2, or 3 heteroatoms chosen from O and NR.sup.1 wherein R.sup.1 is H or (C.sub.1-C.sub.5)alkyl, and A is H, substituted or unsubstituted (C.sub.1-C.sub.20)hydrocarbyl, or substituted or unsubstituted phenyl. The polymeric particle has a particle size in solution of 10 nm to 2000 nm.