	US 12,215,212 B2
	Aqueous resin crosslinking agent, aqueous resin crosslinking agent-containing liquid, and aqueous resin composition
Nami Tsukamoto, Chiba (JP)
Assigned to NISSHINBO CHEMICAL INC., Tokyo (JP)
Appl. No. 17/435,741
Filed by NISSHINBO CHEMICAL INC., Tokyo (JP)
PCT Filed Mar. 4, 2020, PCT No. PCT/JP2020/009234 § 371(c)(1), (2) Date Sep. 2, 2021, PCT Pub. No. WO2020/179835, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 2019-039955 (JP), filed on Mar. 5, 2019.
Prior Publication US 2022/0135770 A1, May 5, 2022
Int. Cl. C08K 5/29 (2006.01); C08G 18/02 (2006.01); C08G 18/09 (2006.01); C08G 18/16 (2006.01); C08G 18/28 (2006.01); C08G 18/38 (2006.01); C08G 18/75 (2006.01); C08K 5/00 (2006.01); C08K 5/42 (2006.01)

CPC C08K 5/29 (2013.01) [C08G 18/025 (2013.01); C08G 18/095 (2013.01); C08G 18/166 (2013.01); C08G 18/283 (2013.01); C08G 18/3819 (2013.01); C08G 18/755 (2013.01); C08G 18/758 (2013.01); C08K 5/0025 (2013.01); C08K 5/42 (2013.01); C08G 2150/00 (2013.01); C08G 2170/00 (2013.01); C08K 2201/014 (2013.01)]

16 Claims

1. A waterborne resin crosslinking agent comprising at least one polycarbodiimide compound (A) selected from the group consisting of a polycarbodiimide compound (A1) and a polycarbodiimide compound (A2), a polycarbodiimide compound (B), and a surfactant (C), wherein the polycarbodiimide compound (A1) has a structure in which an isocyanate group is capped with an end-capping compound (T1) represented by the following general formula (1) at each one of a first and a second terminal of the polycarbodiimide compound (A1),

the polycarbodiimide compound (A2) has a structure in which an isocyanate group is capped with the end-capping compound (T1) at a first terminal of the polycarbodiimide compound (A2), and has a structure in which an isocyanate group is capped with an end-capping compound (T2) at a second terminal of the polycarbodiimide compound (A2),

the polycarbodiimide compound (B) has a structure in which an isocyanate group is capped with an end-capping compound (T3) at a first terminal of the polycarbodiimide compound (B), and has a structure in which an isocyanate group is end-capped with an end-capping compound (T4) at a second terminal of the polycarbodiimide compound (B):

R¹(OCHR²CH₂)_nOH (1)

wherein R¹is an alkyl group having 1 to 4 carbon atoms; R²is a hydrogen atom or a methyl group; n is an integer of 7 to 30; and the end-capping compound (T1) capping the first terminal of the polycarbodiimide compound (A1) and the end-capping compound (T1) capping the second terminal thereof, and the end-capping compound (T1) capping the first terminal of the polycarbodiimide compound (A2) may be the same or different from each other,

the end-capping compounds (T2), (T3), and (T4) are each independently a compound having one amino group, isocyanate group, epoxy group, or carboxy group, or a compound having one hydroxyl group other than the end-capping compound (T1),

a total content of an oxyalkylene group (OCHR²CH₂) in the polycarbodiimide compound (A) is 15% by mass or more,

a total content of an oxyalkylene group in the polycarbodiimide compounds (A) and (B) based on a total amount of the polycarbodiimide compounds (A) and (B) is 0.3 to 1.2% by mass,

a content of the surfactant (C) is 0.1 to 20 parts by mass based on a total content of the polycarbodiimide compounds (A) and (B) of 100 parts by mass, and

a content of the polycarbodiimide (A) is 1 to 3 parts by mass based on a total content of the polycarbodiimide compounds (A) and (B) of 100 parts by mass.