Antibacterial polymer composition

Patent metadata

Field	Value
Publication number	US-12410322-B2
Application number	US-202117789943-A
Country	US
Kind code	B2
Filing date	May 28, 2021
Priority date	May 28, 2020
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

The present disclosure relates to an antibacterial polymer composition, more specifically, to an antibacterial polymer composition enabling preparation of a coating layer exhibiting excellent antibacterial property. The antibacterial polymer composition may use a polymer including a specific number of repeat units as an antibacterial agent. Accordingly, unlike coating compositions using antibacterial monomers/antibacterial oligomers, elution of an antibacterial agent from the coating layer may be prevented even after time passes, and thus, it can continuously exhibit antibacterial property, and yet, is difficult to be absorbed in human body.

First claim

The invention claimed is:

1. An antibacterial polymer composition comprising
a hydrophilic polymer; and
an antibacterial polymer comprising repeat units represented by the following Chemical Formula 1,
wherein the antibacterial polymer is included in a content of 1 part by weight or more and less than 50 parts by weight, based on 100 parts by weight of the hydrophilic polymer, and
further comprising a solvent comprising water:

in the Chemical Formula 1,
R 1 to R 3 are each independently, hydrogen or methyl,
R 4 to R 7 are each independently, hydrogen, C1 to 10 alkyl, or C6 to 30 aryl, n is an integer of 10 to 10,000.

2. The antibacterial polymer composition according to claim 1 ,
wherein the hydrophilic polymer is one or more selected from the group consisting of polyvinyl alcohol (PVA), polyethyleneglycol (PEG), polyvinylpyrrolidone (PVP) and carboxymethyl cellulose (CMC).

3. The antibacterial polymer composition according to claim 1 , wherein the hydrophilic polymer is included in a content of 7 wt % to 20 wt %, based on the total weight of the antibacterial polymer composition.

4. The antibacterial polymer composition according to claim 1 ,
wherein the repeat unit represented by the Chemical Formula 1 is represented by the following Chemical Formula 1-1:

in the Chemical Formula 1-1,
n is an integer of 10 to 10,000.

5. The antibacterial polymer composition according to claim 1 ,
wherein the antibacterial polymer is a homopolymer comprising the repeat units represented by the Chemical Formula 1 only, a copolymer comprising the repeat units represented by the Chemical Formula 1 and repeat units derived from monomers having one or more ethylenically unsaturated groups, or a mixture thereof.

6. The antibacterial polymer composition according to claim 5 ,
wherein the monomers having one or more ethylenically unsaturated groups are one or more selected from acrylic acid-based monomers, alkyl (meth)acrylate-based monomers, acrylamide-based monomers, halogenated vinyl monomers, vinyl alkylate-based monomers, alkenyl cyanide monomers, and aromatic vinyl-based monomers.

7. The antibacterial polymer composition according to claim 5 ,
wherein the repeat units derived from monomers having one or more ethylenically unsaturated groups are represented by the following Chemical Formula 2 or 3:

in the Chemical Formulas 2 and 3,
R′ 1 to R′ 3 are each independently, hydrogen or methyl,
k is an integer of 1 to 10, and
m is an integer of 1 to 10,000.

8. The antibacterial polymer composition according to claim 7 ,
wherein the repeat units derived from monomers having one or more ethylenically unsaturated groups are represented by the following Chemical Formula 2-1, Chemical Formula 3-1, or Chemical Formula 3-2:

wherein in the Chemical Formula 2-1, Chemical Formula 3-1 and Chemical Formula 3-2,
m is an integer of 1 to 10,000.

9. The antibacterial polymer composition according to claim 5 ,
wherein a mole ratio of the repeat units represented by the Chemical Formula 1 and the repeat units derived from monomers having one or more ethylenically unsaturated groups in the copolymer is 1:99 to 99:1.

10. The antibacterial polymer composition according to claim 1 ,
wherein the antibacterial polymer is a linear polymer.

11. The antibacterial polymer composition according to claim 1 ,
wherein the antibacterial polymer has a weight average molecular weight of 5,000 to 1,000,000 g/mol.

12. The antibacterial polymer composition according to claim 1 ,
wherein the solvent is water, or a mixture of water and ethanol.

13. The antibacterial polymer composition according to claim 1 ,
further comprising 1 to 10 parts by weight of glycerol, based on 100 parts by weight of the hydrophilic polymer.

14. The antibacterial polymer composition according to claim 1 ,
wherein the antibacterial polymer composition has a solid content of 10 to 20 wt %.

15. The antibacterial polymer composition according to claim 1 ,
wherein the antibacterial polymer composition has viscosity under constant temperature/constant humidity (23° C., 50% relative humidity), measured at 200 rpm in a V-75 spindle using Brookfield DV2T LV TJ0 equipment, of 1,000 cP to 20,000 cP.

16. The antibacterial polymer composition according to claim 1 ,
wherein the antibacterial polymer composition exhibits antibacterial property to Gram-negative bacteria.

17. An antibacterial product comprising
a substrates; and
a coating layer equipped on at least one side of the substrate,
wherein the coating layer is formed by the antibacterial polymer composition according to claim 1 .

18. The antibacterial product according to claim 17 ,
wherein the coating layer can be separated from the substrate.

19. The antibacterial product according to claim 17 ,
wherein the antibacterial product is one or more selected from the group consisting of materials for maintaining freshness, fabric products, agricultural films, office supplies, packaging materials, and medical supplies.

Assignees

• Lg Chemical Ltd

Inventors

• Yun Haesung
• Choi Hyungsam
• Jung Seonjung
• Lee Ji Seok

Classifications

• C09D129/04 Primary

  Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title

• C09D7/65

  macromolecular (C09D7/41-C09D7/48 take precedence) · CPC title

• C08F220/58

  containing oxygen in addition to the carbonamido oxygen {, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine} · CPC title

• C08F220/60

  containing nitrogen in addition to the carbonamido nitrogen · CPC title

• C08F120/60

  containing nitrogen in addition to the carbonamido nitrogen · CPC title