Gypsum plaster-based material containing casein and activated carbon

Patent metadata

Field	Value
Publication number	US-9856170-B2
Application number	US-201415109497-A
Country	US
Kind code	B2
Filing date	Dec 23, 2014
Priority date	Jan 3, 2014
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

A plaster-based material, in particular a plasterboard intended for the interior fitting of dwellings, contains a mixture of casein and active charcoal. The plaster-based material is used for reducing the amount of volatile organic compounds present in the atmosphere inside dwellings, offices or public buildings.

First claim

The invention claimed is:

1. A VOC absorbing plaster-based material, comprising:
a gypsum plaster material;
a mixture of casein and active charcoal;
a total amount of casein and active charcoal ranging from 0.01 to 20 parts by weight per 100 parts by weight gypsum plaster and the weight of casein representing from 1.0% to 60% by weight of the mixture of casein and active charcoal.

2. The plaster-based material according to claim 1 further comprising the following additives in the following weight proportions, expressed per 100 parts by weight of plaster:
0.1 to 15 parts of an adhesion agent,
0.001 to 10 parts of a setting accelerator,
0.0001 to 1 part of a foaming agent,
0 to 10 parts of at least one water repellent,
0 to 20 parts of at least one fire retardant,
0 to 20 parts of at least one reinforcer.

3. The plaster-based material according to claim 1 , wherein the plaster-based material is in the form of a powder, a paste or a plaster panel.

4. The plaster-based material according to claim 3 , wherein the plaster-based material is a plasterboard.

5. The plaster-based material according to claim 1 , wherein the total amount of casein and active charcoal ranges from 0.5 to 10 parts by weight per 100 parts by weight of plaster.

6. The plaster-based material according to claim 2 , wherein the adhesion agent is a starch, a dextrin or a vegetable flour.

7. The plaster-based material according to claim 6 , wherein the starch is pretreated with an acid.

8. The plaster-based material according to claim 2 , wherein the setting accelerator is hydrated calcium sulfate or potassium sulfate.

9. The plaster-based material according to claim 2 , wherein the foaming agent is sodium lauryl sulfate.

10. The plaster-based material according to claim 2 , wherein the at least one water repellent is a siloxane.

11. The plaster-based material according to claim 2 , wherein the at least one fire retardant is vermiculite, silica, a clay or metal fibres.

12. The plaster-based material according to claim 2 , wherein the at least one reinforcer is polymer fibres, mineral fibres, animal or vegetable fibres.

13. The plaster-based material according to claim 12 , wherein the mineral fibres are glass fibres.

Assignees

• Saint Gobain Placo

Inventors

• Chuda Katarzyna
• Demathieu-Roeltgen Caroline
• Didier Benoit

Classifications

• C04B16/12

  characterised by the shape (fibrous macromolecular compounds C04B16/06; porous macromolecular compounds C04B16/08 ){, e.g. perforated strips} · CPC title

• C04B2111/0062

  Gypsum-paper board like materials · CPC title

• C04B22/02

  Elements · CPC title

• C04B24/003

  Phosphorus-containing compounds · CPC title

• C04B2111/00025

  Aspects relating to the protection of the health, e.g. materials containing special additives to afford skin protection · CPC title