# US 12,110,430 B2 · Adhesive composition, and production method thereof

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- Number: US 12,110,430 B2
- Document ID: US12110430B2
- Status: Granted
- Kind: B2
- Application number: 17/253,586
- Filed: 2019-08-30
- Published: 2021-09-02
- Granted: 2024-10-08
- Earliest claimed: 2018-08-31
- Assignees: Cj Cheiljedang Corporation
- Applicants: Cj Cheiljedang Corporation
- Inventors: Ji Ho Hwang; Young Lyeol Yang; Chang Yub Oh; Chang Suk Lee; Kyung Su Na; Jun Ok Moon
- Web page: https://patentgrep.com/patent/US12110430B2

## CPC

- C09J 7/38: Pressure-sensitive adhesives [PSA]
- C09J 4/00: Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16}
- C09J 2400/20: Presence of organic materials
- C09J 2467/006: in the substrate
- C09J 2477/00: Presence of polyamide
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)

## Abstract

Provided is an adhesive composition, an adhesive product, and a method of preparing an adhesive composition. The adhesive composition including lysine, oxaloacetic acid, and water, wherein the lysine and the oxaloacetic acid are present in the form of an aqueous salt solution and do not form precipitates in the aqueous solution.

## Claims

### Claim 1

An adhesive composition comprising:
lysine, oxaloacetic acid, and water,
wherein the lysine and the oxaloacetic acid are present in a form of an aqueous salt solution and do not form precipitates in the adhesive composition.

### Claim 2 (depends on 1)

The adhesive composition of claim 1, wherein
the precipitates are precipitates of lysine and oxaloacetic acid.

### Claim 3 (depends on 1)

The adhesive composition of claim 1, wherein
a mixing molar ratio of the lysine to the oxaloacetic acid is adjusted such that precipitates of lysine and oxaloacetic acid do not form in the adhesive composition.

### Claim 4 (depends on 3)

The adhesive composition of claim 3, wherein
the mixing molar ratio of the lysine to the oxaloacetic acid is in a range of 1.8:1 to 1:3.

### Claim 5 (depends on 1)

The adhesive composition of claim 1, wherein
a solid content in the adhesive composition is 65 parts by weight or less based on a total weight of the adhesive composition.

### Claim 6 (depends on 1)

The adhesive composition of claim 1, wherein
a sum of the contents of lysine and oxaloacetic acid is in a range of 60 parts by weight to 100 parts by weight based on 100 parts by weight of a solid content in the adhesive composition.

### Claim 7 (depends on 1)

The adhesive composition of claim 1, further comprising
at least one solvent selected from a primary alcohol, a polyhydric alcohol, a diol, and a triol.

### Claim 8 (depends on 7)

The adhesive composition of claim 7, wherein
the solvent comprises: at least one monohydric alcohol selected from methanol, ethanol, propane-2-ol, butane-1-ol, pentane-1-ol, and hexadecane-1-ol; at least one polyhydric alcohol selected from ethane-1,2-diol, propane-1,2-diol, propane-1,2,3-triol, butane-1,3-diol, butane-1,2,3,4-tetraol, pentane-1,2,3,4,5-pentol, hexane-1,2,3,4,5,6-hexol, and heptane-1,2,3,4,5,6,7-heptol; at least one unsaturated aliphatic alcohol selected from prop-2-en-1-ol, 3,7-dimethylocta-2,6-dien-1-ol, and prop-2-yn-1-ol; at least one alicyclic alcohol selected from cyclohexane-1,2,3,4,5,6-hexol and 2-(2-propyl)-5-methylcyclohexane-1-ol; or a mixture thereof.

### Claim 9 (depends on 1)

The adhesive composition of claim 1, wherein
precipitates do not form in the adhesive composition when the adhesive composition is stored at a temperature of −18° C. or higher and less than 40° C. for 14 days or longer.

### Claim 10

A method of preparing an adhesive composition, the method comprising:
mixing lysine, oxaloacetic acid, and water to prepare a mixture; and
stirring the mixture at a temperature of less than 40° C.,
wherein the respective contents of lysine, oxaloacetic acid, and water are adjusted such that precipitates of lysine and oxaloacetic acid do not form in the adhesive composition.

### Claim 11 (depends on 10)

The method of claim 10, wherein
a mixing molar ratio of the lysine to the oxaloacetic acid is in a range of 1.8:1 to 1:3.

### Claim 12 (depends on 10)

The method of claim 10, wherein
the mixture further comprises at least one solvent selected from a primary alcohol, a polyhydric alcohol, a diol, and a triol.

### Claim 13 (depends on 1)

An adhesive product comprising the adhesive composition of claim 1.