Method for preparing an at least partially exfoliated clay

Patent metadata

Field	Value
Publication number	US-12448522-B2
Application number	US-202117455454-A
Country	US
Kind code	B2
Filing date	Nov 18, 2021
Priority date	May 20, 2019
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

The invention relates to a method for preparing an at least partially exfoliated clay. The present invention further relates to an at least partially exfoliated clay obtainable by such a method and to a suspension comprising such a clay, as well to the use of such an at least partially exfoliated clay and of a suspension comprising such an at least partially exfoliated clay. Furthermore, the present invention is also directed to a polymeric composition comprising an at least partially exfoliated clay and/or a suspension comprising an at least partially exfoliated clay.

First claim

The invention claimed is:

1. A method for preparing an at least partially exfoliated clay, the method comprising:
providing a clay;
providing an exfoliating agent comprising a partial ester of a poly(alkylene oxide) (meth)acrylate, vinylene carbonate, and water; and
mixing the clay and the exfoliating agent to obtain the at least partially exfoliated clay,
wherein the water is present in an amount of 10% or less by volume, based on the total volume of the exfoliating agent.

2. The method of claim 1 , wherein the water is present in an amount of from 0.1% to 10% by volume, based on the total volume of the exfoliating agent.

3. The method of claim 1 , wherein the partial ester of the poly(alkylene oxide) (meth)acrylate is present in an amount of from 30 to 90% by volume, based on the total volume of the exfoliating agent.

4. The method of claim 1 , wherein the vinylene carbonate is present in an amount of from 5 to 60% by volume, based on the total volume of the exfoliating agent.

5. The method of claim 2 , wherein the water is present in an amount of from 0.1% to 5% by volume, based on the total volume of the exfoliating agent.

6. The method of claim 5 , wherein the water is present in an amount of 0.5% to 3% by volume, based on the total volume of the exfoliating agent.

7. The method of claim 1 , wherein the clay is selected from the group consisting of hectorite and fluorohectorite.

8. The method of claim 7 , wherein the clay is hectorite.

Assignees

• Henkel Ag & Co Kgaa

Inventors

• Misiak Hanns
• Zhao Ligang
• Kinzelmann Hans-Georg
• Amschler Sonja
• Mayr Lina
• Breu Josef
• Edenharter Andreas

Classifications

• C09J175/04

  Polyurethanes · CPC title

• C09J11/08

  Macromolecular additives · CPC title

• C09J11/04

  inorganic · CPC title

• C09C3/10

  Treatment with macromolecular organic compounds {(C09C3/006 takes precedence)} · CPC title

• C09C3/04

  Physical treatment, e.g. grinding or treatment with ultrasonic vibrations {(C09C3/006 takes precedence)} · CPC title