Aqueous compositions with improved barrier properties

Patent metadata

Field	Value
Publication number	US-12286757-B2
Application number	US-202017755901-A
Country	US
Kind code	B2
Filing date	Nov 12, 2020
Priority date	Nov 15, 2019
Publication date	Apr 29, 2025
Grant date	Apr 29, 2025

Abstract

Described herein is an aqueous composition to improve barrier properties. Particularly, described herein is a polymer-based grease resistant aqueous composition for coating paper and paper products.

First claim

The invention claimed is:

1. An aqueous composition comprising:
(i) at least one first polymer in an amount in a range of from about 10 wt. % to about 90 wt. % derived from at least one first monomer selected from the group consisting of ethylenically substituted aromatic compounds and at least one second monomer selected from the group consisting of (meth) acrylonitrile, (meth) acrylamide, (meth) acrylic acid, alkyl (meth) acrylates and mixtures thereof; and
(ii) at least one second polymer in an amount in a range of from about 10 wt. % to about 90 wt. % comprising the reaction product of a partially neutralized, acid-functional support resin and at least one ethylenically-unsaturated monomer selected from the group consisting of olefins, mono vinylidene aromatics, alpha beta ethylenically-unsaturated carboxylic acids and esters thereof, ethylenically-unsaturated dicarboxylic anhydride and mixtures thereof; and
wherein the wt. % is based on a total weight of the aqueous composition, wherein a ratio of volume average particle size diameter of the at least one first polymer to volume average particle size diameter of the at least one second polymer is in a range of from about 20:1 to about 2:1, and

wherein the at least one first monomer is different from the at least one second monomer.

2. The aqueous composition according to claim 1 , wherein a viscosity of the aqueous composition is in a range of from about 100 cp to about 2500 cp, determined using a viscometer with a #2 spindle at 50 rpm at 23° C.

3. The aqueous composition according to claim 1 , wherein a solid content of the aqueous composition is in a range of from about 20 wt. % to about 70 wt. %, based on a total weight of the aqueous composition.

4. The aqueous composition according to claim 1 , wherein a weight average molecular weight of the first polymer is in a range of from about 20 kDa to about 500 kDa determined according to gel permeation chromatography.

5. The aqueous composition according to claim 1 , wherein a volume average particle size diameter of the first polymer is in a range of from about 90 nm to about 400 nm determined according to dynamic light scattering technique.

6. The aqueous composition according to claim 1 , wherein a viscosity of the first polymer is in a range of from about 100 cp to about 2500 cp, determined using a viscometer with a #2 spindle at 50 rpm at 23° C.

7. The aqueous composition according to claim 1 , wherein the ethylenically substituted aromatic compound is selected from the group consisting of styrene, methylstyrene, butylstyrene, decylstyrene, vinyltoluene, indene, methylindenes and mixtures thereof.

8. The aqueous composition according to claim 1 , wherein an amount of the first monomer is in a range of from about 10 wt. % to about 50 wt. % and an amount of the second monomer is in a range of from about 10 wt. % to about 90 wt. % based on a total weight of the first polymer.

9. The aqueous composition according to claim 1 , wherein an amount of the first monomer is in a range of from about 10 wt. % to about 40 wt. % and an amount of the second monomer is in a range of from about 20 wt. % to about 90 wt. % based on a total weight of the first polymer.

10. The aqueous composition according to claim 1 , wherein an amount of the at least one first monomer is in a range of from about 10 wt. % to about 30 wt. % and an amount of the at least one second monomer is in a range of from about 70 wt. % to about 90 wt. % based on a total weight of the first polymer.

11. The aqueous composition according to claim 1 , wherein the partially neutralized, acid-functional support resin is selected from the group consisting of ammonium salt of a modified acrylic copolymer, an amine salt of a modified acrylic copolymer and mixtures thereof.

12. The aqueous composition according to claim 11 , wherein the modified acrylic copolymer is derived from the group consisting of (meth) acrylic acid monomers, (meth) acrylate monomers, vinyl aromatic monomers and mixtures thereof.

13. The aqueous composition according to claim 1 , wherein a weight average molecular weight of the second polymer is in a range of from about 100 kDa to about 1000 kDa determined according to gel permeation chromatography.

14. The aqueous composition according to claim 1 , wherein a volume average particle size diameter of the second polymer is in a range of from about 50 nm to about 200 nm determined according to dynamic light scattering technique.

15. The aqueous composition according to claim 1 , wherein a viscosity of the second polymer is in a range of from about 100 cp to about 5000 cp determined using a viscometer with a #2 spindle at 50 rpm at 20° C.

16. The aqueous composition according to claim 1 , wherein a weight average molecular weight of the partially neutralized, acid-functional support resin is in a range of from about 2 kDa to about 20 kDa determined according to gel permeation chromatography.

17. The aqueous composition according to claim 1 , wherein the partially neutralized, acid-functional support resin of the second polymer is neutralized with a base selected from the group consisting of ammonia, sodium hydroxide, potassium hydroxide, organic amine and mixtures thereof.

18. The aqueous composition according to claim 1 , wherein partially neutralized refers to neutralization of at least about 5 mol % of acid groups on the acid-functional support resin with a base.

19. The aqueous composition according to claim 1 , wherein the second polymer comprises a partially neutralized, acid-functional support resin in an amount of about 10 wt. % to about 50 wt. % and at least one ethylenically-unsaturated monomer in an amount in a range of from about 5 wt. % to about 90 wt. % based on a total weight of the second polymer.

20. The aqueous composition according to claim 1 , further comprising a wax in an amount in a range of from about 0.10 wt. % to about 25 wt. % based on a total weight of the aqueous composition.

21. The aqueous composition according to claim 20 , wherein the wax is an aqueous emulsion.

22. The aqueous composition according to claim 21 , wherein the aqueous emulsion is selected from the group consisting of paraffins, polyethylene, polypropylene, microcrystalline waxes, fluorinated waxes, ethylene copolymer waxes, propylene copolymer waxes and mixtures thereof.

23. The aqueous composition according to claim 1 , further comprising a surfactant.

24. The aqueous composition according to claim 23 , wherein the surfactant is anionic or non-ionic.

25. The aqueous composition according to claim 24 , wherein the surfactant is selected from the group consisting of alkyl sulfonates, alkyl benzene sulfonates, alkyl sulfates, alkyl benzene sulfates, phosphates, phosphinates, fatty carboxylates and mixtures thereof.

26. The aqueous composition according to claim 24 , wherein the surfactant comprises at least one fatty alcohol ethoxylate.

27. The aqueous composition according to claim 24 , wherein the surfactant comprises at least one alkylsulfosuccinate ethoxylate.

28. The aqueous composition according to claim 24 , wherein the surfactant comprises at least one alkylsulfosuccinate ethoxylate and at least one fatty alcohol ethoxylate.

29. The aqueous composition according to claim 24 , wherein the surfactant comprises at least one fatty alcohol having an alkyl chain length of about 12 c

Assignees

• Basf Se

Inventors

• Zeits Paul
• Seecharan Andrew
• Deeter Gary
• Sardashti Amirpouyan

Classifications

• D21H27/10

  Packing paper (packaging materials of special type or form B65D65/38) · CPC title

• D21H19/12

  applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds · CPC title

• D21H17/37

  Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates · CPC title

• C09D133/064

  containing anhydride, COOH or COOM groups, with M being metal or onium-cation · CPC title

• C09D125/16

  Homopolymers or copolymers of alkyl-substituted styrenes · CPC title