	US 12,252,609 B2
	Aqueous resin dispersion and aqueous coating composition containing said resin dispersion
Andreas Arrian Kunze, Muenster (DE); Sibylle Schoeps, Muenster (DE); Rene Hamsen, Muenster (DE); Dirk Benning, Muenster (DE); Hildegund Diekmann, Drensteinfurt (DE); Martin Geuting, Muenster (DE); Silke Przybilla, Muenster (DE); Joerg Ressel, Muenster (DE); Ignacia Rump, Muenster (DE); Dagmar Schemschat, Senden (DE); Hubert Theil, Shanghai (CN); Anna Kondrat, Muenster (DE); Beate Rohkamp, Muenster (DE); Monika Tiggemann, Drensteinfurt (DE); Thorsten Winkler, Muenster (DE); Egbert Nienhaus, Muenster (DE); and Sven Gosheger, Drensteinfurt (DE)
Assigned to BASF COATINGS GMBH, Muenster (DE)
Appl. No. 17/613,511
Filed by BASF Coatings GmbH, Münster (DE)
PCT Filed May 13, 2020, PCT No. PCT/EP2020/063260 § 371(c)(1), (2) Date Nov. 23, 2021, PCT Pub. No. WO2020/234066, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 19176231 (EP), filed on May 23, 2019.
Prior Publication US 2022/0267589 A1, Aug. 25, 2022
Int. Cl. C08L 63/04 (2006.01); C08L 63/00 (2006.01); C09D 5/02 (2006.01); C09D 163/00 (2006.01)

CPC C08L 63/04 (2013.01) [C08L 63/00 (2013.01); C09D 5/02 (2013.01); C09D 163/00 (2013.01); C08L 2201/54 (2013.01); C08L 2205/025 (2013.01)]

16 Claims

1. An aqueous resin dispersion (AD) comprising:

a resin component (R) comprising:

at least one di- and/or polyfunctional monomeric primary and/or secondary amine (M) and

polyfunctional polymeric organic amines having primary and/or secondary amino groups,

wherein the resin component (R) has an NH equivalent of 150 to 400 g/mol and a proportion by weight of di- and/or polyfunctional monomeric organic amines (M) of 5% to 15% by weight,

and wherein the aqueous dispersion (AD) is prepared by a two-stage process (A+B) comprising:

(A) reacting two starting components (Ia) and (Ib) to give an amino-functional resin mixture (I) having an NH equivalent of 50 to 140 g/mol and a proportion by weight of di- and/or polyfunctional monomeric primary and/or secondary amines (M) of 17.5% to 40% by weight,

wherein

component (Ia) is an epoxy-functional resin mixture and, in interreacted form, comprises the following components (Ia1) and (Ia2):

(Ia1)=at least one di- and/or multifunctional organic epoxy compound,

(Ia2)=at least one compound X—R wherein X is a functional group reactive toward epoxy groups and R is an organic radical containing polyoxyalkylene units and not containing any further X groups,

and

component (Ib) comprises at least one di- and/or multifunctional monomeric primary and/or secondary amine (M),

(B) reacting two starting components (IIa) and (IIb) in the aqueous phase to give the resin component (R), wherein

component (IIa) comprises the amino-functional resin mixture (I)

and

component (IIb) comprises at least one di- and/or multifunctional organic epoxy compound, wherein the epoxy compounds used have an average epoxy equivalent weight of less than 400 g/mol,

wherein the amines (M) consist to an extent of at least 65 mol % of amines consisting of amino groups and hydrocarbon units.