US 11,781,031 B2
Coating composition and wood article manufactured therefrom
Song Niu, Foshan (CN); Hongbin Chen, Foshan (CN); Shigang Fan, Foshan (CN); and Xi Zhao, Foshan (CN)
Assigned to GUANGDONG HUARUN PAINTS CO., LTD, Foshan (CN)
Appl. No. 17/608,584
Filed by GUANGDONG HUARUN PAINTS CO., LTD, Foshan (CN)
PCT Filed Apr. 30, 2020, PCT No. PCT/CN2020/088067
§ 371(c)(1), (2) Date Nov. 3, 2021,
PCT Pub. No. WO2020/224519, PCT Pub. Date Nov. 12, 2020.
Claims priority of application No. 201910376693.7 (CN), filed on May 7, 2019.
Prior Publication US 2022/0228016 A1, Jul. 21, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 21/08 (2006.01); B32B 27/38 (2006.01); C09D 163/00 (2006.01); C09D 163/02 (2006.01); C09D 163/04 (2006.01); C08G 59/68 (2006.01); C09D 15/00 (2006.01); C08G 59/16 (2006.01); C08G 59/14 (2006.01); C09D 163/10 (2006.01)
CPC C09D 15/00 (2013.01) [B32B 21/08 (2013.01); B32B 27/38 (2013.01); C08G 59/1455 (2013.01); C08G 59/1494 (2013.01); C08G 59/68 (2013.01); C09D 163/00 (2013.01); C09D 163/04 (2013.01); C09D 163/10 (2013.01)] 14 Claims
 
1. A coating composition for wood substrate comprising:
(A) a film-forming resin composition comprising a reactive donor capable of providing two or more nucleophilic carbanions, and a reactive acceptor comprising two or more carbon-carbon double bonds;
(B) a catalyst for catalyzing the Michael addition crosslinking reaction between the reactive donor and the reactive acceptor,
wherein the reactive donor has an aromatic epoxy backbone, and
wherein the reactive donor has an epoxy equivalent weight in the range of from 400 to 1100 g/mol.
 
13. A wood article comprising
a wood substrate having at least one major surface; and
a cured coating formed from the coating composition of claim 1 that is directly or indirectly applied on the major surface.
 
14. The wood article according to claim 13, wherein the wood substrate is selected from one or more of hardwood, chestnut, eucalyptus, red chestnut, camellia, eucalyptus, Douglas fir, Japanese cedar, American cypress, Japanese red pine, Japanese cypress, water walnut, black walnut, maple, Japan beech, Japanese paulownia, birch, Borneo, magnolia, ash, teak, Xylosma japonicum, Catalpa wood, Dryobalanops spp., fir, oak and rubber wood.