Aqueous resin dispersion and aqueous coating composition containing said resin dispersion

Patent metadata

Field	Value
Publication number	US-12331187-B2
Application number	US-202017612707-A
Country	US
Kind code	B2
Filing date	Apr 23, 2020
Priority date	May 23, 2019
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

Described herein is an aqueous resin dispersion (AD) including a resin component (R) including 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. Also described herein is an aqueous two-component coating composition including the resin dispersion.

First claim

The invention claimed is:

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 the at least one di- and/or polyfunctional monomeric organic amine (M) of 5% to 15% by weight in the aqueous resin dispersion (AD), wherein the at least one di- and/or polyfunctional monomeric organic amine (M) is unreacted in the aqueous resin dispersion (AD);
wherein the polyfunctional polymeric organic amines having primary and secondary amino groups also comprise, in interreacted form,
(i) at least one di- and/or multifunctional organic epoxy compound, wherein the epoxy compounds have an average epoxy equivalent weight of less than 400 g/mol,
(ii) at least one monomeric amine (M), and
(iii) 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 wherein the at least one monomeric amine (M) consists to an extent of at least 65 mol % of amines consisting of amino groups and hydrocarbon units.

2. The aqueous resin dispersion (AD) as claimed in claim 1 , wherein the at least one monomeric amine (M) is a difunctional primary and/or secondary amine.

3. The aqueous resin dispersion (AD) as claimed in claim 1 , wherein the resin component (R) has an N—H equivalent of 170 to 250 g/mol.

4. The aqueous resin dispersion (AD) as claimed in claim 1 , wherein the X group in the compound (iii) is a primary amino group.

5. The aqueous resin dispersion (AD) as claimed in claim 1 , wherein the compound (iii) is a primary polyoxyalkylenemonoamine.

6. The aqueous resin dispersion (AD) as claimed in claim 1 , wherein the at least one di- and/or multifunctional organic epoxy compound of component (i) has an average epoxy equivalent weight of less than 250 g/mol.

7. The aqueous resin dispersion (AD) as claimed in claim 1 , wherein the polymeric organic amines consist of components (i), (ii) and (iii).

8. The aqueous resin dispersion (AD) as claimed in claim 1 , wherein the resin component (R) consists of the at least one di- and/or polyfunctional monomeric primary and/or secondary amine (M) and the polyfunctional polymeric organic amines having primary and/or secondary amino groups.

9. The aqueous resin dispersion (AD) as claimed in claim 1 , wherein the at least one monomeric amine (M) consists to an extent of at least 75 mol % of amines consisting of amino groups and hydrocarbon units.

10. An aqueous two-component coating composition comprising a paint base component (1) and a curing component (2), wherein
I) the paint base component (1) comprises at least one aqueous dispersion as claimed in claim 1 and the curing component (2) comprises at least one epoxy resin, wherein the epoxy resins have an average epoxy equivalent weight of less than 400 g/mol,
or
II) the paint base component (1) comprises at least one epoxy resin, where the epoxy resins have an average epoxy equivalent weight of less than 400 g/mol, and the curing component (2) comprises the at least one aqueous dispersion.

11. The coating composition as claimed in claim 10 , characterized in that it is a surfacer or primer-surfacer.

12. A process for producing a cured coating on a substrate, the process comprising applying a coating composition as claimed in claim 10 to the substrate and then curing the composition.

13. A process for repairing a multicoat paint system having defects, comprising applying a coating composition as claimed in claim 10 in the region of the defects, curing the composition to produce a cured coating layer and then sanding the cured coating layer.

14. A coating that has been produced by a process as claimed in claim 12 .

15. The aqueous resin dispersion (AD) as claimed in claim 1 , wherein the at least one monomeric amine (M) is a difunctional primary amine.

16. The aqueous resin dispersion (AD) as claimed in claim 1 , wherein the at least one monomeric amine (M) consists to an extent of at least 90 mol % of amines consisting of amino groups and hydrocarbon units.

17. The aqueous resin dispersion (AD) as claimed in claim 1 , wherein the at least one monomeric amine (M) consists to an extent of 100 mol % of amines consisting of amino groups and hydrocarbon units.

Assignees

• Basf Coatings Gmbh

Inventors

• Kunze Andreas Arrian
• Schoeps Sibylle
• Hamsen Rene
• Benning Dirk
• Diekmann Hildegund
• Geuting Martin
• Przybilla Silke
• Ressel Joerg
• Rump Ignacia
• Schemschat Dagmar
• Theil Hubert
• Kondrat Anna
• Rohkamp Beate
• Tiggemann Monika
• Winkler Thorsten
• Nienhaus Egbert
• Gosheger Sven

Classifications

• C09D163/00

  Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins · CPC title

• C08L2201/50

  Aqueous dispersion, e.g. containing polymers with a glass transition temperature (Tg) above 20°C · CPC title

• C08G59/5033

  aromatic · CPC title

• C08G59/5026

  cycloaliphatic · CPC title

• C08G59/245

  aromatic · CPC title