Composition for joints

Patent metadata

Field	Value
Publication number	US-10131581-B2
Application number	US-201515321021-A
Country	US
Kind code	B2
Filing date	Jun 25, 2015
Priority date	Jun 26, 2014
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

A composition based on calcium carbonate includes nanometric boehmite and/or nanometric aluminum trihydroxide. A coating can be obtained from this composition. This composition makes it possible to obtain products having better high-temperature dimensional stability.

First claim

The invention claimed is:

1. A composition, comprising:
from 50 to 99 wt % of the calcium carbonate;
from 0.1 to 10 wt % of particles of boehmite having a particle size smaller than 950 nm; and
at least one additive.

2. The composition according to claim 1 , wherein the at least one additive is organic.

3. The composition according to claim 1 , comprising:
from 0.5 to 10% of the at least one additive, wherein the at least one additive is selected from the group consisting of an organic additive allowing chemical setting of said composition and a binder.

4. The composition according to claim 1 , wherein the at least one additive is a mineral additive.

5. The composition according to claim 1 , wherein the size of the particles of boehmite is below 750 nm.

6. The composition according to claim 5 , wherein the size of the particles of boehmite is above 20 nanometers.

7. The composition according to claim 1 , wherein the size of the particles of boehmite is below 500 nm.

8. The composition according to claim 7 , wherein the size of the particles of boehmite is above 20 nanometers.

9. The composition according to claim 1 , wherein the size of the particles of boehmite is below 400 nanometers.

10. The composition according to claim 1 , wherein the size of the particles of boehmite is above 20 nanometers.

11. A coating composition, comprising:
the composition according to claim 1 , mixed with water.

12. The coating composition according to claim 11 , comprising from 28 to 40 wt % of water.

13. A product, comprising the composition according to claim 1 .

14. An element of construction, comprising:
the composition according to claim 1 .

15. An element of construction, comprising:
the coating composition according to claim 11 .

16. A method for fireproofing a product, comprising:
adding particles of boehmite having a particle size smaller than 950 nm in an amount of 0.1 to 10 wt % to a composition comprising from 50 to 99 wt % of the calcium carbonate and at least one additive.

17. A method of manufacturing an element of construction, comprising:
mixing a composition comprising
from 50 to 99 wt % of the calcium carbonate,
from 0.1 to 10 wt % of particles of boehmite having a particle size smaller than 950 nm; and
at least one additive; and then

forming the element of construction.

18. The method according to claim 17 , wherein the element of construction is a joint.

19. An element of construction formed by the method according to claim 17 .

20. A composition, comprising:
from 50 to 99 wt % of calcium carbonate;
from 3 to 8 wt % of particles of aluminium trihydroxide having a particle size smaller than 950 nm; and
at least one selected from the group consisting of a mineral additive and an organic additive,
wherein the mineral additive is at least one selected from the group consisting of a hydrated calcium sulphate, anhydrous calcium sulphate, dolomite, talc, mica, and a clay, and
wherein the organic additive is at least one selected from the group consisting of a cellulose ether, a polyacrylamide, a polyvinyl alcohol, a polyvinyl acetate, a styrene/acrylic copolymer, and an ethylenevinyl acetate copolymer.

21. The composition of claim 20 , comprising the mineral additive.

Assignees

• Saint Gobain Placo

Inventors

• Bouteiller Bernard
• Roubin Marc

Classifications

• C04B2111/34

  Non-shrinking or non-cracking materials · CPC title

• C04B14/28

  of calcium · CPC title

• C04B26/02 Primary

  Macromolecular compounds · CPC title

• C04B28/06 Primary

  Aluminous cements (monolithic refractories or refractory mortars C04B35/66) · CPC title

• C04B22/142

  Sulfates · CPC title