Process for preparing stable dispersions of starch particles

Patent metadata

Field	Value
Publication number	US-9695551-B2
Application number	US-201615219839-A
Country	US
Kind code	B2
Filing date	Jul 26, 2016
Priority date	Jun 7, 2010
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

In one or more embodiments, the present disclosure provides for a process for preparing a dispersion of starch particles in an aqueous liquid. In one or more embodiments, the process includes introducing a feed starch and the aqueous liquid into a rotor stator mixer, maintaining the feed starch and the aqueous liquid in the rotor stator mixer at a temperature ranging from a gelation temperature to less than a solubilization temperature, and shearing the feed starch into starch particles with the rotor stator mixer to form the dispersion of starch particles in the aqueous liquid. In one or more embodiments, the starch particles produced by this process have an average particle size diameter of no larger than 2 micrometers and the dispersion has 20 to 65 weight percent of the starch particles based on a total weight of the dispersion.

First claim

What is claimed is:

1. A starch particle in an aqueous dispersion, the starch particle having an average particle size diameter of no larger than 2 micrometers, wherein the starch particle does not include a cross-linker added during production of the starch particle, and the aqueous dispersion having at least 20 wt. % to 65 wt. % of the starch particles based on the total weight of the aqueous dispersion and a viscosity of 1000 cP or less.

2. The starch particle of claim 1 , wherein the starch particle includes a cross-linker added after the production of the starch particle.

3. The starch particle of claim 1 , wherein the average particle size diameter of the starch particle is no larger than 1 micrometers.

4. The starch particle of claim 1 , wherein the average particle size diameter of the starch particle is 10 to 200 nanometers.

5. The starch particle of claim 1 , wherein the starch particle is formed from waxy corn.

Assignees

• Dow Global Technologies Llc

Inventors

• Welsch Gregory W
• Ninness Brian J
• Read Michael D
• Young Timothy J
• Matteucci Michal E
• Hammond David E
• Hong Liang
• Ervick Jr Donald K

Classifications

• C08B30/02 Primary

  Preparatory treatment, e.g. crushing of raw materials {or steeping process (machines for preliminary washing A23N)} · CPC title

• D21H19/12 Primary

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

• C08J3/05

  from solid polymers · CPC title

• C08L3/02

  Starch; Degradation products thereof, e.g. dextrin · CPC title

• C08B30/08

  Concentration of starch suspensions · CPC title