Hardening accelerator for mineral binder compositions

Patent metadata

Field	Value
Publication number	US-9233876-B2
Application number	US-201314090639-A
Country	US
Kind code	B2
Filing date	Nov 26, 2013
Priority date	May 26, 2011
Publication date	Jan 12, 2016
Grant date	Jan 12, 2016

Abstract

A hardening accelerator for mineral binder compositions, in particular for cementitious binder compositions, is provided. The hardening accelerator contains a combination of a) a first amino alcohol (A) including at least one primary alcohol group, and b) a second amino alcohol (E) including at least one secondary alcohol group.

First claim

What is claimed is:

1. A hardening accelerator for a mineral binder composition, the hardening accelerator comprising:
a) a first amino alcohol (A) and
b) a second amino alcohol (E),
wherein the first amino alcohol (A) is tris(hydroxymethyl)aminomethane and/or N-methyldiethanolamine, and wherein the second amino alcohol (E) is N-methyldiisopropanolamine.

2. The hardening accelerator according to claim 1 , wherein a weight ratio of the first amino alcohol (A) to the second amino alcohol (E) is in the range of 100:1-1:100.

3. The hardening accelerator according to claim 1 , further comprising at least one of a concrete additive and/or a mortar additive.

4. The hardening accelerator according to claim 1 , further comprising at least one additive that is a liquifier.

5. The hardening accelerator according to claim 1 , wherein a weight ratio of the first amino alcohol (A) to the second amino alcohol (E) is in the range of 50:1-1:50.

6. The hardening accelerator according to claim 1 , wherein a weight ratio of the first amino alcohol (A) to the second amino alcohol (E) is in the range of 10:1-1:10.

7. The hardening accelerator according to claim 4 , wherein the liquifier is a polycarboxylate.

8. The hardening accelerator according to claim 4 , wherein the liquifier is a comb polymer comprising a polycarboxylate backbone having polyether side chains bound via ester, ether and/or amide groups.

9. A binder composition, comprising:
a mineral binder, and
the hardening accelerator according to claim 1 .

10. The binder composition according to claim 9 , wherein the first amino alcohol (A) and the second amino alcohol (E), relative to the mineral binder, in each case comprise a proportion of 0.01-6 M.

11. The binder composition according to claim 9 , wherein the mineral binder is a cementitious binder.

12. The binder composition according to claim 9 , wherein the mineral binder is a hydraulic binder.

13. The binder composition according to claim 9 , wherein the first amino alcohol (A) and the second amino alcohol (E), relative to the mineral binder, in each case comprise a proportion of 0.01-4 wt %.

14. The binder composition according to claim 9 , wherein the first amino alcohol (A) and the second amino alcohol (E), relative to the mineral binder, in each case comprise a proportion of 0.025-3 wt %.

15. The binder composition according to claim 9 , wherein the first amino alcohol (A) and the second amino alcohol (E), relative to the mineral binder, in each case comprise a proportion of 0.05-3 wt %.

16. The binder composition according to claim 9 , wherein the first amino alcohol (A) and the second amino alcohol (E), relative to the mineral binder, in each case comprise a proportion of 0.08-1.5 wt %.

17. A molded body obtained by curing the binder composition according to claim 9 after an addition of water.

18. A method for preparing a mineral binder composition, the method comprising adding the hardening accelerator according to claim 1 to a mineral binder.

Assignees

• Sika Technology Ag

Inventors

• Marazzani Beat
• Bürge Christian
• Kurz Christophe
• Mäder Gilbert

Classifications

• C04B24/122 Primary

  Hydroxy amines · CPC title

• C04B2103/14

  Hardening accelerators · CPC title

• C04B24/2647

  containing polyether side chains · CPC title

• C04B28/04

  Portland cements · CPC title

• C04B40/0039

  Premixtures of ingredients · CPC title