Crosslinkable polymer-powder compositions redispersible in water

Patent metadata

Field	Value
Publication number	US-12134692-B2
Application number	US-201917433785-A
Country	US
Kind code	B2
Filing date	Feb 26, 2019
Priority date	Feb 26, 2019
Publication date	Nov 5, 2024
Grant date	Nov 5, 2024

Abstract

A crosslinkable polymer powder compositions redispersible in water includes one or more vinyl ester polymers, one or more compounds bearing epoxide groups and optionally one or more curing agents which crosslink with the compounds bearing epoxide groups. The vinyl ester polymers do not comprise any epoxide-functional monomer units. The crosslinkable polymer powder compositions redispersible in water includes ≥51% by weight, based on the total weight of the vinyl ester polymers, of one or more compounds bearing epoxide groups.

First claim

The invention claimed is:

1. A crosslinkable polymer powder composition redispersible in water, comprising:
one or more protective colloid-stabilized vinyl ester polymers;
one or more compounds bearing epoxide groups; and
optionally one or more curing agents which crosslink with the one or more compounds bearing epoxide groups,
wherein the one or more protective colloid-stabilized vinyl ester polymers do not comprise any epoxide-functional monomer units,
and the crosslinkable polymer powder composition redispersible in water comprises ≥51% by weight, based on the total weight of the one or more protective colloid-stabilized vinyl ester polymers, of the one or more compounds bearing epoxide groups and
wherein a mixture of the one or more protective colloid-stabilized vinyl ester polymers and the one or more compounds bearing epoxide groups has a glass transition temperature Tg of −40° C. to +20° C., determined by differential scanning calorimetry,
wherein the crosslinkable polymer powder composition redispersible in water does not comprise an emulsifier.

2. The crosslinkable polymer powder composition of claim 1 ,
wherein one or more epoxy resins are present as the one or more compounds bearing epoxide groups.

3. The crosslinkable polymer powder composition of claim 1 ,
wherein 55 to 300% by weight of the one or more compounds bearing epoxide groups are present, based on the total weight of the one or more protective colloid-stabilized vinyl ester polymers.

4. The crosslinkable polymer powder composition of claim 1 ,
wherein that 20 to 75% by weight of the one or more compounds bearing epoxide groups are present, based on the total weight of the crosslinkable polymer powder composition redispersible in water.

5. The crosslinkable polymer powder composition of claim 1 ,
wherein the one or more protective colloid-stabilized vinyl ester polymers are based on ≥50% by weight of vinyl esters, based on the total weight of the one or more protective colloid-stabilized vinyl ester polymers.

6. The crosslinkable polymer powder composition of claim 1 ,
wherein one or more protective colloid-stabilized vinyl ester polymers are selected from the group comprising vinyl ester homopolymers, copolymers of vinyl acetate with ethylene, copolymers of vinyl acetate with ethylene and one or more further vinyl esters, copolymers of one or more vinyl esters, vinyl chloride and ethylene and copolymers of vinyl acetate with ethylene and one or more acrylic esters.

7. The crosslinkable polymer powder composition of claim 1 ,
wherein 15 to 75% by weight of the one or more protective colloid-stabilized vinyl ester polymers are present, based on the total weight of the crosslinkable polymer powder composition.

8. The crosslinkable polymer powder composition of claim 1 ,
wherein the crosslinkable polymer powder composition has a glass transition temperature Tg in the range of −40° C. to +20° C., determined by differential scanning calorimetry, and the plot for determining the glass transition temperature Tg only has one maximum.

9. A process for producing the crosslinkable polymer powder composition of claim 1 , comprising:
polymerizing the one or more protective colloid-stabilized vinyl esters by means of free-radically initiated emulsion polymerization or suspension polymerization in water and then drying thereof,
wherein ≥51% by weight, based on the total weight of the one or more protective colloid-stabilized vinyl esters, of the one or more compounds bearing epoxide groups are added before or during the polymerization or before or during drying.

10. The process of claim 9 , wherein the one or more compounds bearing epoxide groups are added wholly or partially during or after post-polymerization or wholly or partially after completion of the polymerization or wholly or partially before drying.

11. A tile adhesive, comprising the crosslinkable polymer powder composition of claim 1 .

12. An integrated thermal insulation adhesive, comprising the crosslinkable polymer powder composition of claim 1 .

13. A render, comprising the crosslinkable polymer powder composition of claim 1 .

14. A spackling compound, comprising the crosslinkable polymer powder composition of claim 1 .

15. A steam barrier, comprising the crosslinkable polymer powder composition of claim 1 .

16. A levelling compound, comprising the crosslinkable polymer powder composition of claim 1 .

17. A sealing slurry, comprising the crosslinkable polymer powder composition of claim 1 .

18. A mortar, comprising the crosslinkable polymer powder composition of claim 1 .

19. A coating, comprising the crosslinkable polymer powder composition of claim 1 .

20. A binder for textiles and paper, comprising the crosslinkable polymer powder composition of claim 1 .

Assignees

• Wacker Chemie Ag

Inventors

• Melchin Timo
• Dietrich Ulf
• Wölfle Heimo

Classifications

• C08L63/00

  Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title

• C04B24/2623

  Polyvinylalcohols; Polyvinylacetates · CPC title

• C04B24/281

  Polyepoxides · CPC title

• C08L2312/00

  Crosslinking · CPC title

• C08L2201/54

  Aqueous solutions or dispersions · CPC title