# US 2018/0023252 A1 · Starch Amine Complexes for Increased Water Resistance of Paper

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- Number: US 2018/0023252 A1
- Document ID: US20180023252A1
- Status: Published application
- Kind: A1
- Application number: 15/277,331
- Filed: 2016-09-27
- Published: 2018-01-25
- Earliest claimed: 2016-07-19
- Assignees: The United States of America as represented by the Secretary of Agriculture
- Applicants: The United States of America, as Represented by the Secretary of Agriculture
- Inventors: George F. Fanta; Frederick C. Felker; Gordon W. Selling
- Web page: https://patentgrep.com/patent/US20180023252A1

## CPC

- D21H 19/12: applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
- D21H 17/07: Nitrogen-containing compounds
- D21H 17/24: Polysaccharides
- D21H 17/66: Salts, e.g. alums
- D21H 21/16: Sizing or water-repelling agents
- D21H 23/22: Addition to the formed paper
- D21H: PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR

## Abstract

Disclosed are methods of increasing the surface hydrophobicity of the surface of a cellulosic article involving applying a solution of amylose-fatty ammonium salt inclusion complex in water to the article and then optionally applying an alkaline solution to the article to neutralize said amylose fatty ammonium salt inclusion complex to form an insoluble amylose fatty amine inclusion complex. Also disclosed are cellulosic articles produced by the methods.

## Claims

### Claim 1

A method of increasing the surface hydrophobicity of the surface of a cellulosic article, said method comprises applying a solution of amylose-fatty ammonium salt inclusion complex in water to said article and then optionally applying an alkaline solution to said article to neutralize said amylose-fatty ammonium salt inclusion complex to form an insoluble amylose fatty amine inclusion complex.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the concentration of said amylose-fatty ammonium salt inclusion complex in water is from about 1 to about 5% solids.

### Claim 3 (depends on 1)

The method according to claim 1, wherein said amylose-fatty ammonium salt inclusion complex is made by a process comprising passing amylose and water through a steam jet cooker at a temperature of about 140° C. and a pressure of about 550 kPa to form a jet cooked starch solution and adding water solutions of fatty ammonium salts to said jet cooked starch solutions to form said amylose-fatty ammonium salt inclusion complexes.

### Claim 4 (depends on 1)

A cellulosic article, said cellulosic article made by the method according to claim 1.

### Claim 5 (depends on 4)

The cellulosic article according to claim 4, wherein said cellulosic article has a contact angle at least about 5 degrees up to about 150 degrees higher than a control cellulosic article.

### Claim 6 (depends on 5)

The cellulosic article according to claim 5, wherein said cellulosic article is paper or a cellulosic paper product that has a contact angle at least about 5 degrees up to about 150 degrees higher than a control cellulosic paper or a cellulosic paper product.

### Claim 7 (depends on 5)

The cellulosic article according to claim 5, wherein said cellulosic article is a cotton fiber, fabric or yarn, that has a contact angle at least about 5 degrees up to about 150 degrees higher than a control cotton fiber, fabric or yarn.