US 12,435,177 B2
Aqueous polyurethane resin composition and coating material using the composition
Hiroshi Morita, Osaka (JP); Kazunori Munakata, Takarazuka (JP); Yingdan Zhu, Shanghai (CN); Long Zhang, Shanghai (CN); and Zhirong Fan, Langenfeld (DE)
Assigned to Covestro Deutschland AG, Leverkusen (DE)
Appl. No. 17/787,988
Filed by Covestro Deutschland AG, Leverkusen (DE)
PCT Filed Dec. 22, 2020, PCT No. PCT/EP2020/087651
§ 371(c)(1), (2) Date Jun. 22, 2022,
PCT Pub. No. WO2021/136727, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. PCT/CN2019/129785 (WO), filed on Dec. 30, 2019; and application No. 20152018 (EP), filed on Jan. 15, 2020.
Prior Publication US 2023/0048853 A1, Feb. 16, 2023
Int. Cl. C08G 18/12 (2006.01); C08G 18/08 (2006.01); C08G 18/30 (2006.01); C08G 18/32 (2006.01); C08G 18/34 (2006.01); C08G 18/38 (2006.01); C08G 18/48 (2006.01); C08G 18/66 (2006.01); C08G 18/72 (2006.01); C08G 18/73 (2006.01); C08G 18/75 (2006.01); C09D 175/08 (2006.01)
CPC C08G 18/12 (2013.01) [C08G 18/0823 (2013.01); C08G 18/0828 (2013.01); C08G 18/0866 (2013.01); C08G 18/302 (2013.01); C08G 18/3206 (2013.01); C08G 18/3228 (2013.01); C08G 18/3271 (2013.01); C08G 18/3275 (2013.01); C08G 18/348 (2013.01); C08G 18/3857 (2013.01); C08G 18/4808 (2013.01); C08G 18/4854 (2013.01); C08G 18/6674 (2013.01); C08G 18/6681 (2013.01); C08G 18/6685 (2013.01); C08G 18/6688 (2013.01); C08G 18/722 (2013.01); C08G 18/73 (2013.01); C08G 18/755 (2013.01); C08G 18/758 (2013.01); C09D 175/08 (2013.01); C08G 2150/00 (2013.01); C08G 2170/00 (2013.01)] 10 Claims
 
1. An aqueous polyurethane resin composition comprising a polyurethane resin obtained from at least components (a) to (d) below:
(a) at least compound (1) at least one alicyclic diisocyanate compound selected from the group consisting of 4,4′-diisocyanatodicyclohexylmethane and isophorone diisocyanate, and compound (2) hexamethylene diisocyanate, the alicyclic diisocyanate compounds (1) comprising 40 to 60 mol % based on 100 mol % of the organic diisocyanate compounds of component (a);
(b) one or more polyol compounds comprising 75 to 100% by weight of polytetramethylene glycol polyol based on the total weight of polyol compounds (b);
(c) acidic group-containing compounds comprising at least two types of compounds which are a compound containing a carboxyl group as the acid group (a carboxyl group-containing compound) and a compound containing a sulfo group as the acid group (a sulfo group-containing compound); and
(d) a chain extender selected from the group consisting of a polyamine compound, a diamine compound, a polyol compound and an alkanolamine compound, the chain extender having a molecular weight of not more than 400,
wherein the aqueous polyurethane resin composition has a viscosity of not less than 500 Pa·s and not more than 50,000 Pa·s when the polyurethane resin is contained in an amount of 65% by weight;
wherein component (a) is 13 to 20% by weight of the polyurethane resin, and
wherein component (b) is 65 to 85% by weight of the polyurethane resin.