Method for Preparing an At Least Partially Exfoliated Clay

Patent metadata

Field	Value
Publication number	US-2022073751-A1
Application number	US-202117455454-A
Country	US
Kind code	A1
Filing date	Nov 18, 2021
Priority date	May 20, 2019
Publication date	Mar 10, 2022
Grant date	—

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

1 . A method for preparing an at least partially exfoliated clay, comprising the steps of:
(1) providing a clay; (2) providing an exfoliating agent, comprising a partial ester of poly(alkylene oxide) (meth)acrylate, a cyclic carbonate and water, wherein the water is present in an amount of 10% by volume or less based on the volume of the exfoliating agent; (3) mixing the clay and the exfoliating agent; and (4) obtaining the at least partially exfoliated clay.

2 . The method according to claim 1 , wherein the clay is a natural or synthetic layered silicate mineral.

3 . The method according to claim 1 , wherein the clay is selected from the group consisting of smectite, montmorillonite, saponite, beidellite, montmorillonite, hectorite, stevensite, vermiculite, kaolinite, hallosite, magadiite, fluorohectorite, and combinations thereof.

4 . The method according to claim 1 , wherein the partial ester of poly(alkylene oxide) (meth)acrylate is represented by:
(CH 2 ═CR 1 —CO 2 —(CHR 2 CH 2 O) a —(CHR 3 CH 2 O) b )dx-L-((CHR 4 CH 2 O) c —(CHR 5 CH 2 O) d —OH) y
wherein
R 1 is hydrogen or methyl, R 2 to R 5 are each independently hydrogen or C 1-6 alkyl,
L is single bond or w valent linking group selected from linear or branched chain C 1-12 alkylene, C 3-12 cyclic alkylene, phenylene, residue of a C 1-12 polyol, optionally substituted by hydroxy, thiol, epoxy, vinyl, (meth)acrylic ester group and pentaerythritol residue,
x is from 1 to 5,
y is from 1 to 5,
w is from 2 to 6,
a and b are each independently 1 to 50, and
c and d are each independently 0 to 50,
with the proviso that
when L is single bond, x and y are 1, and when L is the w valent linking group, w is the sum of x and y.

5 . The method according to claim 1 , wherein the partial ester of poly(alkylene oxide) (meth)acrylate is selected from poly(alkylene oxide) mono(meth)acrylate, pentaerythritol poly(alkylene oxide) (meth)acrylate, poly(ethylene oxide) mono(meth)acrylate, poly(propylene oxide) mono(meth)acrylate, pentaerythritol poly(ethylene oxide) di(meth)acrylate, and combinations thereof.

6 . The method according to claim 1 , wherein the partial ester of poly(alkylene oxide) (meth)acrylate has a number average molecular weight from 150 to 3,000.

7 . The method according to claim 1 , wherein the cyclic carbonate is selected from a compound represented by:

in which,
A is represented by (C(R 6 R 7 )) p , R 8 X or Z,
p is of 2 or more, R 6 and R 7 , each independently is hydrogen atom, a saturated or unsaturated, straight-chain or branched chain or cyclic, aromatic or arylaliphatic, optionally substituted hydrocarbon group with 1 to 12 carbon atoms, or ether group with 1 to 12 carbon atoms and up to 3 oxygen atoms,
R 8 is a divalent aliphatic, cycloaliphatic, aromatic, arylaliphatic or ether-containing optionally substituted hydrocarbon group with 1 to 20 carbon atoms, and X is hydroxy-, epoxy, carboxylic acid-, carboxylic acid ester group, or
Z is an unsaturated polymerizable group, a vinyl-group, a (meth)acrylic-group, a maleic acid-group, a fumaric acid-group, an itaconic acid-group or a crotonic acid-ester-group;

the dimer thereof; and combinations thereof.

8 . The method according to claim 1 , wherein the cyclic carbonate is selected from the group consisting of vinylene carbonate, ethylene carbonate, propylene carbonate, glycerine carbonate, 5-ethyl-5-(hydroxymethyl)-1,3-dioxane-2-one, 1,3-dioxane-2-one, 5-((allyloxy)methyl)-5-ethyl-1,3-dioxane-2-one, 1,3-dioxepine-2-one and combination thereof.

9 . The method according to claim 1 , wherein the cyclic carbonate has a number average molecule weight from 50 to 1,000.

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

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

12 . The method according to claim 1 , wherein the cyclic carbonate is present in amount of 5 to 60% by volume based on the volume of the exfoliating agent.

13 . An at least partially exfoliated clay obtainable by the method of claim 1 .

14 . A suspension comprising the at least partially exfoliated clay according to claim 13 and the exfoliating agent.

15 . A polymeric composition comprising the at least partially exfoliated clay according to claim 13 .

16 . A polymeric composition comprising the suspension according to claim 14 .

17 . The polymeric composition according to claim 15 , wherein the polymeric composition is selected from the group consisting of a coating composition, a sealant composition, and an adhesive composition.

Assignees

• Henkel Ag & Co Kgaa

Inventors

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

Classifications

• C08K9/08

  Ingredients agglomerated by treatment with a binding agent · CPC title

• C09C1/42 Primary

  Clays · CPC title

• C09D7/61

  inorganic · CPC title

• C09J11/04

  inorganic · CPC title

• C09J11/08

  Macromolecular additives · CPC title