Stabilisation of mineral foams

Patent metadata

Field	Value
Publication number	US-10183891-B2
Application number	US-201615737574-A
Country	US
Kind code	B2
Filing date	Jun 20, 2016
Priority date	Jun 22, 2015
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

The invention relates to a mineral foam stabilized by an association of surfactants comprising: a first surfactant carrying at least one sulfate group; and a second amphoteric surfactant.

First claim

The invention claimed is:

1. A mineral foam containing water, mineral particles, wherein the mineral particles are particles of plaster, water-repellent agents, and a combination of surfactants comprising:
at least one first surfactant (S1) bearing at least one sulfate group; and
at least one second surfactant (S2) that is amphoteric.

2. The mineral foam as claimed in claim 1 , wherein the first surfactant is selected from the group consisting of:
alkyl ether sulfates;
alkyl sulfates; and
mixtures of two or more of these compounds.

3. The mineral foam as claimed in claim 1 , wherein the second surfactant is selected from the group consisting of:
amine oxides;
glycinates;
sultaines; and
mixtures of two or more of these compounds.

4. The mineral foam as claimed in claim 1 , suitable for the formation of lightweight building materials.

5. The mineral foam as claimed in claim 2 , wherein alkyl ether sulfates are C8-C18 alkyl ether sulfates.

6. The mineral foam as claimed in claim 5 , wherein C8-C18 alkyl ether sulfates are C12 and C13 alkyl ether sulfates.

7. The mineral foam as claimed in claim 2 , wherein alkyl sulfates are C8-C18 alkyl sulfates.

8. The mineral foam as claimed in claim 7 , wherein C8-C18 alkyl sulfates are C12 alkyl sulfates.

9. A process for forming a stable foam, the process comprising forming the foam with a combination of surfactants comprising:
at least one first surfactant (S1) bearing at least one sulfate group; and
at least one second surfactant (S2) that is amphoteric;

and contacting the foam with mineral particles, wherein the mineral particles are particles of plaster.

Assignees

• Rhodia Operations

Inventors

• Castaing Jean-Christophe
• Karegianni Katerina
• Labeau Marie-Pierre
• Vanberleere Arnaud

Classifications

• C04B24/16 Primary

  Sulfur-containing compounds · CPC title

• C04B30/00 Primary

  Compositions for artificial stone, not containing binders · CPC title

• C04B2103/406

  non-ionic · CPC title

• C04B24/12

  Nitrogen containing compounds {organic derivatives of hydrazine (hydrazine C04B22/00)} · CPC title

• C04B24/2652

  Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles · CPC title