Accelerator mixture for peroxide hardener and two-component mortar system containing same

Patent metadata

Field	Value
Publication number	US-9463449-B2
Application number	US-201213457261-A
Country	US
Kind code	B2
Filing date	Apr 26, 2012
Priority date	Apr 27, 2011
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

An accelerator mixture for peroxide hardeners, in particular an accelerator mixture for an organic peroxide-curing resin mixture, a two-component mortar system containing the same for chemical fastening and use of the same for chemical fastening of anchoring elements in boreholes are disclosed. Using a mixture of bis-N-substituted p-toluidines with bis-N-substituted anilines or bis-N-substituted m-toluidines, it is possible to provide a mortar composition for chemical fastening of anchoring elements in boreholes, which will have an improved low-temperature curing and improved load ratings at high temperatures with an extended gel time.

First claim

What is claimed is:

1. An accelerator mixture for peroxide-curing resin mixtures, comprising:
a main accelerator (I), and a co-accelerator (II), wherein the main accelerator (I) is a compound of formula (I)

and the co-accelerator (II) is a compound of formula (II-1) or (II-2)

in which R 1 and R 2 , independently of one another, denote a C 1 or C 2 alkyl group, a C 1 -C 3 hydroxyalkyl group or a mono- or polyethoxylated or propoxylated C 1 -C 3 hydroxyalkyl group, and the molar ratio of (I):(II) is between 1:1 and 5:1.

2. The accelerator mixture according to claim 1 , wherein the main accelerator (I) is N,N-bis(2-hydroxyethyl)-p-toluidine, N,N-bis(2-hydroxypropyl)-p-toluidine or an ethoxylated or propoxylated derivative thereof.

3. The accelerator mixture according to claim 1 , wherein the co-accelerator (II) is N,N-diethylaniline, N,N-bis(2-hydroxyethyl)aniline, N-ethyl-N-hydroxyethylaniline, N,N-bis(2-hydroxyethyl)-m-toluidine or N,N-bis(2-hydroxypropyl)-m-toluidine.

4. The accelerator mixture according to claim 3 , wherein the main accelerator (I) is N,N-bis(2-hydroxypropyl)-p-toluidine and the co-accelerator (II) is N,N-bis(2-hydroxyethyl)-m-toluidine.

5. The accelerator mixture according to claim 1 , wherein a molar ratio of the main accelerator (I) to the co-accelerator (II) is 3:1.

6. A resin mixture, comprising:
a radically polymerizable compound;
an accelerator according to claim 1 ; and
optionally an inhibitor and a reactive diluent.

7. The resin mixture according to claim 6 , wherein the main accelerator (I) is N,N-bis(2-hydroxypropyl)-p-toluidine and the co-accelerator (II) is N,N-bis(2-hydroxyethyl)-m-toluidine.

8. The resin mixture according to claim 6 , wherein a molar ratio of the main accelerator (I) to the co-accelerator (II) is 3:1.

9. The resin mixture according to claim 6 , wherein the accelerator is present in an amount of 1 to 3 wt % based on the resin mixture.

10. A reactive resin mortar comprising the resin mixture according to claim 6 and inorganic additives.

11. The reactive resin mortar according to claim 10 , wherein the resin mixture is present in an amount of 30 to 50 wt % based on the reactive resin mortar.

12. The reactive resin mortar according to claim 10 , wherein the inorganic additives are present in an amount of 50 to 70 wt % based on the reactive resin mortar.

13. A two-component mortar system, comprising:
the reactive resin mortar according to claim 10 ; and
a hardener, which contains an organic peroxide as a curing agent.

14. The two-component mortar system according to claim 13 , wherein the organic peroxide is a diacyl peroxide.

15. The two-component mortar system according to claim 13 , further comprising an inhibitor.

16. The two-component mortar system according to claim 13 , wherein the hardener also contains inorganic additives.

17. The two-component mortar system according to claim 13 , further comprising a hydraulically setting or polycondensable inorganic compound, and water.

18. A method for chemical fastening of an anchoring element in a borehole, comprising the steps of:
placing the anchoring element in the borehole;
fastening of the anchoring element in the borehole with the two-component mortar system according to claim 13 .

Assignees

• Buergel Thomas
• Hilti Ag

Inventors

• Buergel Thomas

Classifications

• C04B40/065

  Two or more component mortars · CPC title

• C04B26/02

  Macromolecular compounds · CPC title

• E21B23/00

  Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells (setting of casings, screens or liners E21B43/10) · CPC title

• C04B40/0039

  Premixtures of ingredients · CPC title

• B01J31/0237 Primary

  Amines · CPC title