Compositions containing polyanion, ethoxylated cationic polymer and phyllosilicates for improved oxygen barrier coatings

Patent metadata

Field	Value
Publication number	US-10570306-B2
Application number	US-201615742644-A
Country	US
Kind code	B2
Filing date	Jul 27, 2016
Priority date	Jul 30, 2015
Publication date	Feb 25, 2020
Grant date	Feb 25, 2020

Abstract

Described is an aqueous composition comprising (a) at least one polyanion, (b) at least one ethoxylated cationic polymer, and (c) at least one phyllosilicate. The composition can be used for providing oxygen barrier properties to a polymer film.

First claim

The invention claimed is:

1. An aqueous composition, comprising:
(a) at least one polyanion;
(b) at least one ethoxylated cationic polymer; and
(c) at least one phyllosilicate.

2. The aqueous composition of claim 1 , wherein the aqueous composition comprises:
(a) the at least one polyanion in a range of 10 to 90 wt. %, with respect to a solids content of the aqueous composition;
(b) the at least one ethoxylated cationic polymer in a range of 10 to 90 wt. %, with respect to the solids content; and
(c) the at least one phyllosilicate in a range of 5 to 75 wt. %, with respect to the solids content.

3. The aqueous composition of claim 1 , wherein the at least one polyanion (a) and the at least one ethoxylated cationic polymer (b) are dissolved in the aqueous composition and wherein the at least one polyanion (a) is a polymer comprising acid groups neutralized with at least one base selected from the group consisting of an inorganic base and a monovalent organic base, said polymer comprising acid groups having a weight average molecular weight of at least 10000 g/mol prior to neutralization and wherein said at least one ethoxylated cationic polymer (b) has a weight average molecular weight of at least 2500 g/mol.

4. The aqueous composition of claim 1 , wherein a weight ratio of the at least one polyanion (a), calculated without neutralizing agent, to the at least one ethoxylated cationic polymer (b) is in a range of 10:1 to 10:5 and wherein a weight ratio of the sum of the at least one polyanion (a) and the at least one ethoxylated cationic polymer (b) to the at least one phyllosilicate (c) is in a range of 95:5 to 50:50.

5. The aqueous composition of claim 1 , wherein the at least one polyanion is a polymer produced from monomers selected from the group consisting of a monoethylenically unsaturated C 3 to C 10 carboxylic acid, vinylsulfonic acid, styrenesulfonic acid, acrylamidomethylpropanesulfonic acid, vinylphosphonic acid, and a salt thereof.

6. The aqueous composition of claim 1 , wherein the at least one polyanion (a) is a neutralized polyacrylic acid or a neutralized copolymer of acrylic acid and maleic acid, and a weight average molecular weight of the at least one anionic polymer (a) is in a range of 10,000 to 200,000 g/mol.

7. The aqueous composition of claim 1 , wherein a degree of ethoxylation of the at least one ethoxylated cationic polymer (b) is in a range of 40:1 to 1:10 based on a weight amount of CH2CH2O-units to the other polymer components, and a weight average molecular weight of the at least one ethoxylated cationic polymer (b) is in a range of 2500 to 3 million g/mol.

8. The aqueous composition of claim 1 , wherein the at least one phyllosilicate (c) is an exfoliated organically modified smectite.

9. The aqueous composition of claim 1 , wherein the at least one phyllosilicate (c) is a natural or synthetic phyllosilicate with an aspect ratio greater than 400.

10. The aqueous composition of claim 1 , wherein the at least one phyllosilicate (c) is a synthetic smectite of the formula: [M n/valency ] inter [M I m M II o ] oct [Si 4 ] tet O 10 Y 2 , wherein
M is H + or a metal cation with an oxidation state of 1 to 3,
M I is a metal cation with an oxidation state of 2 or 3,
M II is a metal cation with an oxidation state of 1 or 2,
O is oxygen,
Y is a mono-anion,
m is
≤2.0 for each M I metal cation with an oxidation state of 3, and
≤3.0 for each M I metal cations with an oxidation state of 2,

o is ≤1.0, and
n, the layer charge, is in a range of 0.01 to 2.0.

11. The aqueous composition of claim 1 , wherein a surface of the at least one phyllosilicate (c) comprises an organic compound comprising at least one group selected from the group consisting of an amino group and an ammonium group.

12. The aqueous composition of claim 1 , wherein the at least one phyllosilicate (c) is hydrothermally produced or is produced by high-temperature melt synthesis and subsequent exfoliation and/or delamination.

13. The aqueous composition of claim 1 , wherein the at least one ethoxylated cationic polymer (b) is selected from the group consisting of an ethoxylated vinylimidazolium polymer, an ethoxylated diallyl dimethyl ammonium halide polymer, an ethoxylated vinylamine polymer, an ethoxylated ethylene imine polymer, an ethoxylated dialkylaminoalkyl acrylate polymer, an ethoxylated dialkylammoalkyl methacrylate polymer, an ethoxylated dialkylaminoalkyl acrylamide polymer and an ethoxylated dialkylaminoalkyl methacrylamide polymer.

14. The aqueous composition of claim 1 , wherein the at least one ethoxylated cationic polymer (b) is an ethoxylated polyalkylenimine or an ethoxylated polyamine of formula I:

wherein:
R represents identical or different, linear or branched C 2 -C 12 -alkylene radicals or an etheralkyl unit of the following formula:

wherein:
R 10 , R 11 ,R 12 represent identical or different, linear or branched C 2 -C 6 -alkyline radicals, and
d is an integer in a range of 0 to 50;

B represents a continuation of the ethoxylated polyalkylenimine or the ethoxylated polyamine by branching;
E is an alkylenoxy unit of the formula II, wherein the alkylenoxy units may be in any order

wherein:
R 1 represents 1,2-propylene, 1,2-butylene, 1,2-isobutylene and/or 1,2-pentene;
R 2 represents hydrogen and/or C 1 -C 22 -alkyl and/or C 7 -C 22 aralkyl;
m is an integer in a range of 5 to 50;
n is an integer in a range of 0 to 40;
y and z are each from 0 to 150, where the sum of y+z is at least 1;

wherein a number of ethyleneoxy groups is more than 50% of all alkylenoxy groups.

15. The aqueous composition of claim 1 , wherein the at least one ethoxylated cationic polymer (b) is an ethoxylated polyethyleneimine.

16. A polymer film, coated with the aqueous composition of claim 1 .

17. The polymer film of claim 16 , wherein an oxygen transmission rate of the polymer film after coating is less than 40% of an oxygen transmission rate of the polymer film before coating, both rates being measured at 25° C. and 75% relative humidity.

18. The polymer film of claim 16 , wherein the polymer film comprises at least one material selected from the group consisting of a polyethylene terephthalate, an oriented polypropylene, a polyethylene, a casted polypropylene, a biodegradable aliphatic-aromatic copolyester, a metalized polyethylene terephthalate, a metalized oriented polypropylene and a polyimide, and wherein a thickness of a coating layer is in a range of 0.2 to 50 μm after drying.

19. A package, comprising the polymer film of claim 16 .

20. A method of coating a polymeric film with the aqueous composition of claim 1 , the method comprising:
(a) contacting at least one side of the polymeric film with the aqueous composition and
(b) drying said aqueous composition to form a barrier coating on the polymeric film.

Assignees

• Basf Se

Inventors

• Pietsch Ines
• Roschmann Konrad
• Deeter Gary
• Mcguire Meaghan
• Feller Russell Kenneth
• Breu Josef
• Kalo Hussein

Classifications

• C08J7/0427

  with only one layer of a composition containing a polymer binder (with more layers C08J7/042) · CPC title

• C09D133/064

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

• C09D7/62

  modified by treatment with other compounds · CPC title

• C09D5/00

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• C08J2433/02

  Homopolymers or copolymers of acids; Metal or ammonium salts thereof · CPC title