US 12,473,410 B2
Depolymerized lignosulfonate and lignin as extender for phenolic resin
Mahesh Subramanian, Centerville, OH (US)
Assigned to WILSONART LLC, Austin, TX (US)
Filed by Wilsonart LLC, Austin, TX (US)
Filed on May 3, 2023, as Appl. No. 18/311,650.
Claims priority of provisional application 63/364,088, filed on May 3, 2022.
Prior Publication US 2023/0357518 A1, Nov. 9, 2023
Int. Cl. C08J 5/24 (2006.01); B32B 29/00 (2006.01)
CPC C08J 5/246 (2021.05) [B32B 29/005 (2013.01); C08J 5/245 (2021.05); C08J 5/248 (2021.05); B32B 2250/26 (2013.01); B32B 2250/40 (2013.01); B32B 2260/028 (2013.01); B32B 2260/046 (2013.01); C08J 2300/00 (2013.01); C08J 2497/00 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A high-pressure decorative laminate, comprising:
a decorative layer; and
a core layer composed of at least one resin impregnated sheet of core paper, which is impregnated with a resin composition, the resin composition comprising a resin and lignin derivatives;
wherein the resin composition is prepared according to a method comprising:
mixing and cooking ammonium lignosulfonate, acetic acid, and methanol;
adding KOH or MgO and epicholorohydrin;
cooking the mixture;
mixing and cooking, with the mixture produced above, water, dioctyl sulfosuccinate sodium salt, resin, KOH, glyoxal, and methanol; and
adjusting to desired pH and viscosity.