Composition based on layered hydroxides and polyesters, process for preparing the composition, and use thereof

Patent metadata

Field	Value
Publication number	US-10125269-B2
Application number	US-201515304400-A
Country	US
Kind code	B2
Filing date	Mar 10, 2015
Priority date	Apr 16, 2014
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

The present invention relates to a composition comprising (A) at least one carboxy-functional polyester having an acid number in the range from 20 to 250 mg KOH/g, prepared using at least one difunctional monomer (a1) with aliphatic groups having 12 to 70 carbon atoms between the functional groups, and also (B) at least one synthetic layered hydroxide, where the at least one layered hydroxide (B) is prepared in the presence of the polyester (A). The present invention further relates to the preparation of the composition and also to the use of the composition as coating material.

First claim

The invention claimed is:

1. A composition comprising
(A) at least one carboxy-functional polyester having an acid number of from 20 to 250 mg KOH/g, obtained by polymerizing monomers that comprise at least one difunctional monomer (a1) with aliphatic groups having 12 to 70 carbon atoms between the functional groups,
and also
(B) at least one synthetic layered hydroxide,
wherein the at least one layered hydroxide (B) is prepared in the presence of the polyester (A).

2. The composition as claimed in claim 1 , wherein the aliphatic groups of the at least one monomer (a1) polymerized to obtain the polyester (A) have 13 to 50 carbon atoms.

3. The composition as claimed in claim 1 , wherein the at least one monomer (a1) is at least one selected from the group consisting of fully hydrogenated bisphenols, dimeric aliphatic fatty alcohols, and dimeric aliphatic fatty acids.

4. The composition as claimed in claim 1 , wherein the acid number of the polyester (A) is in the range from 25 to 150 mg KOH/g.

5. The composition as claimed in claim 1 , wherein the at least one layered hydroxide (B) is at least one selected from the group consisting of layered double hydroxides and layered single hydroxides.

6. The composition as claimed in claim 5 , wherein the layered hydroxide comprises at least one metallic cation selected from the group consisting of Li + , Zn 2+ , Mg 2+ , Ca 2+ , Cu 2+ , Ni 2+ , Co 2+ , Fe 2+ , Mn 2+ , Cd 2+ , Pb 2+ , Sr 2+ , Al 3+ , Bi 3+ , Fe 3+ , Cr 3+ , Ga 3+ , Ni 3+ , Co 3+ and Mn 3+ .

7. The composition as claimed in claim 1 , wherein at least 5 mol % of monomers in polyester (A) are the at least one difunctional monomer (a1).

8. The composition as claimed in claim 1 , wherein the at least one layered hydroxide is prepared in a basic reaction medium comprising at least one alcohol and optionally water.

9. The composition as claimed in claim 1 , wherein the layered hydroxide is obtained from a metal salt and a base in a process that leaves no extraneous components originating from the metal salts and bases remaining in the composition, or a process that also produces at least one extraneous component capable of removal from the composition by evaporating and without washing.

10. The composition as claimed in claim 9 , wherein the metal salt is a hydroxide, acetate, oxide, or combination thereof, and wherein the base is ammonium hydroxide.

11. The composition as claimed in claim 1 , further comprising at least one crosslinking agent, at least one polymeric binder other than the polyester (A), and/or at least one organic solvent.

12. The composition as claimed in claim 1 , which is an aqueous coating material which comprises at least one polymeric binder other than the polyester (A), having anionic groups.

13. A process for producing the composition as claimed in claim 1 , the process comprising preparing the at least one layered hydroxide (B) in the presence of the polyester (A).

14. A coating, comprising the composition as claimed in claim 1 .

15. A method, comprising coating a substrate with the coating of claim 14 .

16. The composition of claim 1 , wherein a scattering curve of the composition shows reflections at scattering angles of 35° and also 60°.

17. The composition of claim 1 , wherein the at least one synthetic layered hydroxide comprises exfoliated layers or layers intercalated with the at least one polyester.

Assignees

• Basf Coatings Gmbh
• Univ Blaise Pascal Clermont Ferrand Ii

Inventors

• Hintze-Bruening Horst
• Austrup Elke
• Leroux Fabrice
• Stimpfling Thomas
• Swanson Claudia
• Langry Arthur
• Koenig Andrej

Classifications

• C08K3/22

  of metals · CPC title

• C08K5/098

  Metal salts of carboxylic acids · CPC title

• C09D167/08 Primary

  Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids · CPC title

• C09D7/70

  characterised by shape, e.g. fibres, flakes or microspheres · CPC title

• C09D5/084 Primary

  Inorganic compounds · CPC title