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US 9,315,688 B2Granted
Aqueous sealant system, wood product and method for sealing wood-based substrate
AssigneeValspar Sourcing, Inc.
InventorsSha Yanan, Xie Xiaofang, Tang Guiming, Shi Chengfen, Duan Gang
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Abstract
An aqueous sealant system, a wood product sealed by the aqueous sealant system, and a method for sealing a wood-based substrate. The aqueous sealant system includes: a) a film-forming resin composition including an aqueous latex of an active hydrogen-containing polymer, a filler, and optional additional additives; and b) a multi-isocyanate hardener, wherein the ratio by weight of the component a) to the component b) is 100:3 to 100:10.
Claims16
A method for sealing a wood substrate, comprising:
- (1) applying an aqueous sealant system onto at least a part of the surface of the wood substrate, wherein the wood substrate comprises has a tannin content of not lower than 5% and up to 30%, relative to the total content of extractable solids in the wood, and wherein the aqueous sealant system comprises:
- a) a film-forming resin composition comprising an aqueous latex of an active hydrogen-containing polymer, a filter, and optional additives, wherein the active-hydrogen-containing polymer comprises one or more of a vinyl acetate-ethylene copolymer, a vinyl acetate-ethylene-(meth)acrylate copolymer, a vinyl acetate-(meth)acrylate copolymer, polyvinyl acetate, or polyvinyl alchohol;
- and
- b) a multi-isocyanate hardener,
- wherein the ratio by weight of component a) to component b) is 100:3 to 100:10;
- and
- (2) drying the aqueous sealant system to form a seal coating on the surface of the wood substrate, wherein the seal coating prevents migration of tannins in the wood to the surface of the wood substrate.
4 more elements
Dependencies are inferred from the claim text.