COATINGS FOR THE BACKSIDES OF WOODEN BOARDS
A method includes applying a hydrophobic coating composition to a backside of a wooden board to prevent warping and cupping when the board is exposed to water vapor. The coating composition can include a chlorinated resin and water, or may be a solvent-based or a 100% solids composition including an epoxy(meth)acrylate, a polyester(meth)acrylate, a polyether(meth)acrylate, or a polyurethane(meth)acrylate, a multifunctional (meth)acrylate, and a photoinitiator.
1 . A method comprising applying an aqueous coating composition to a backside of a wooden substrate, wherein the aqueous coating composition comprises a polyvinylidene chloride copolymer and water.
2 . The method of claim 1 , wherein the aqueous coating composition further comprises at least one surfactant selected from silicone surfactants, nonionic surfactants, and combinations thereof.
3 . (canceled)
4 . The method of claim 1 , wherein the aqueous coating composition comprises at least one organic co-solvent.
5 . (canceled)
6 . The method of claim 1 , further comprising drying the aqueous coating composition.
7 . The method of claim 1 , further comprising applying a top coat composition over the aqueous coating composition.
8 . The method of claim 7 , wherein the top coat composition is curable with visible or ultraviolet light.
9 . The method of claim 8 , wherein the aqueous coating composition is at least partially cured prior to applying the top coat composition.
10 . (canceled)
11 . The method of claim 7 , wherein the top coat composition comprises an epoxy or a polyurethane(meth)acrylate.
12 . The method of claim 11 , wherein the top coat composition comprises an epoxy or a polyurethane acrylate.
13 . A wood board comprising a topside and a backside opposite the topside, wherein the backside comprises a cured aqueous coating composition of claim 1 .
14 . A method comprising applying an aqueous coating composition to a backside of a wooden board, wherein the aqueous coating composition comprises 70 wt % to 98 wt % of a polyvinylidene chloride resin, about 2 wt % to about 30 wt % water, and than about 1 wt % of at least one surfactant.
15 . (canceled)
16 . The method of claim 14 , further comprising applying a UV curable top coat composition over the aqueous coating composition, wherein the UV curable top coat comprises a urethane or an epoxy(meth)acrylate.
17 . The method of claim 16 , wherein the top coat composition comprises a urethane acrylate.
18 - 26 . (canceled)
27 . A method comprising applying to a backside of a wood board an ultraviolet (UV) curable coating composition comprising about 10 wt % to about 70 wt % of an urethane(meth)acrylate, about 1 wt % to about 50 wt % of a difunctional (meth)acrylate, about 0.1 wt % to 15wt % of at least one photoinitiator, and about 3 wt % to about 50 wt % of at least one organic solvent, and curing the coating composition.
28 - 29 . (canceled)
30 . The method of claim 27 , further comprising applying a primer coating composition to a surface of the backside of the wood board prior to applying the UV curable coating composition, wherein the primer coating composition comprises a polyvinylidene chloride copolymer and water.
31 . (canceled)
32 . The method of claim 30 , further comprising drying the primer coating composition prior to applying the UV curable coating composition.
33 . The method of claim 27 , wherein UV curable coating composition further comprises about 1 wt % to about 20 wt % of at least one acrylic resin.
34 . (canceled)
35 . A method of coating a substrate, the method comprising applying the UV curable coating composition of claim 27 to a backside of a wooden board and curing the coating composition, wherein the wooden board is hardwood with a width of at least 10 cm.
36 - 38 . (canceled)
39 . The method of claim 27 , wherein the coating composition further comprises a mineral filler.
40 . The method of claim 39 , wherein the mineral filler comprises silica.
41 - 58 . (canceled)