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US 12,473,410 B2Granted
Depolymerized lignosulfonate and lignin as extender for phenolic resin
AssigneeWilsonart LLC
InventorMahesh Subramanian
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Abstract
A resin composition for impregnating paper products used in manufacture of high-pressure decorative laminates includes a resin and lignin derivatives.
Claims11
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.
7 more elements
Dependencies are inferred from the claim text.