US 11,685,805 B2
Aqueous dispersion of polyurethane
Evgeny Avtomonov, Leverkusen (DE); Zhirong Fan, Jiangsu Province (CN); Rolf Irnich, Bergheim (DE); and Sujuan Zhai, Shanghai (CN)
Assigned to Covestro Deutschland AG, Leverkusen (DE)
Appl. No. 16/468,387
Filed by COVESTRO DEUTSCHLAND AG, Leverkusen (DE)
PCT Filed Dec. 18, 2017, PCT No. PCT/EP2017/083369
§ 371(c)(1), (2) Date Jun. 11, 2019,
PCT Pub. No. WO2018/114838, PCT Pub. Date Jun. 28, 2018.
Claims priority of application No. 201611252062.7 (CN), filed on Dec. 19, 2016.
Prior Publication US 2021/0130532 A1, May 6, 2021
Int. Cl. C09D 175/06 (2006.01); C08G 18/48 (2006.01); C08G 18/75 (2006.01); C08G 18/08 (2006.01); C08G 18/12 (2006.01); C08G 18/28 (2006.01); C08G 18/44 (2006.01); C08G 18/72 (2006.01); C08G 18/73 (2006.01); C08J 3/07 (2006.01); C09D 175/08 (2006.01); D06N 3/14 (2006.01)
CPC C08G 18/758 (2013.01) [C08G 18/0814 (2013.01); C08G 18/12 (2013.01); C08G 18/283 (2013.01); C08G 18/44 (2013.01); C08G 18/4829 (2013.01); C08G 18/4833 (2013.01); C08G 18/722 (2013.01); C08G 18/73 (2013.01); C08J 3/07 (2013.01); C09D 175/06 (2013.01); C09D 175/08 (2013.01); D06N 3/14 (2013.01); C08J 2375/08 (2013.01); D06N 2209/123 (2013.01); D06N 2209/128 (2013.01)] 18 Claims
 
1. An aqueous dispersion of polyurethane, comprising a polyurethane polymer produced by a reaction of a reaction mixture comprising a polyurethane prepolymer A) and an isocyanate-reactive component B), wherein the polyurethane prepolymer A) is produced by a reaction of:
A1) a polyisocyanate which has a functionality of not less than 2; and
A2) a multifunctional polyether polyol which has a functionality of not less than 3 in an amount of 1% to 30% by weight, based on the amount of the reaction mixture as 100% by weight, the multifunctional polyether polyol having a number-average molecular weight of 1,800 g/mol to 12,000 g/mol, wherein the multifunctional polyether polyol is produced by a reaction of ethylene oxide and an initiator and has a star structure, and wherein the multifunctional polyether polyol has the following structure:

OG Complex Work Unit Chemistry
wherein,
m is 0 to 50;
n is 1 to 50;
m′ is not less than 3;
X is one or more selected from the group consisting of propyl, isopropyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, styryl, methylstyryl and pinanyl.