Curing composition for an epoxy resin compound, epoxy resin compound and multi-component epoxy resin system

Patent metadata

Field	Value
Publication number	US-11535699-B2
Application number	US-201917276914-A
Country	US
Kind code	B2
Filing date	Sep 9, 2019
Priority date	Sep 19, 2018
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A curing composition for an epoxy resin compound useful for the chemical fastening of construction elements, an epoxy resin compound, and a multi-component epoxy resin system are provided. A method for the chemical fastening of construction elements in boreholes and a method of using a salt (S) as an accelerator in an epoxy resin compound for chemical fastening, the epoxy resin compound including a Mannich base and an amine which is reactive to epoxy groups.

First claim

The invention claimed is:

1. A multi-component epoxy resin system, comprising:
an epoxy resin component (A) and a curing component,
wherein the epoxy resin component (A) contains a curable epoxy resin, and the curing component contains at least one Mannich base and at least one amine which is reactive to epoxy groups,
wherein the curable epoxy resin is based on one or more of bisphenol A or bisphenol F,
wherein the at least one Mannich base is obtainable by reacting a phenolic compound selected from one or more of the group consisting of bisphenol A, bisphenol F, resorcinol, and phenol,
with an aldehyde or an aldehyde precursor and an amine having at least two active hydrogen atoms in the molecule which are bonded to a nitrogen atom, and
further comprising at least one salt (S) selected from salts of nitric acid, or salts of trifluoromethanesulfonic acid or combinations thereof contained in the epoxy resin component (A) and/or in the curing component, and
wherein the at least one salt (S) comprises a cation other than ammonium or other than an ammonium cation substituted with an organic group, and
wherein the at least one amine which is reactive to epoxy groups is selected from the group consisting of one or more selected from one or more of the group consisting of mXDA (m-xylylenediamine), IPDA (3-aminomethyl-3,5,5-trimethylcyclohexane), Dytek A (2-methylpentanediamine), TMD (1,6-diamino-2,2,4-trimethylhexane), N-EAP (N-ethylaminopiperazine), MCDA (methylcyclohexyl diamine), and 1,3-BAC (1,3-bis(aminomethyl)cyclohexane).

2. The multi-component epoxy resin system according to claim 1 , wherein the at least one salt (S) comprises a cation selected from the group consisting of alkali metals, alkaline earth metals, lanthanoids, aluminum, and combinations thereof.

3. The multi-component epoxy resin system according to claim 1 , wherein the aldehyde is an aliphatic aldehyde, and wherein the aldehyde precursor comprises trioxane or paraformaldehyde.

4. The multi-component epoxy resin system according to claim 1 , wherein the at least one salt (S) is present in a proportion of from 0.1 to 15 wt. %, based on total weight of the curing composition.

5. The multi-component epoxy resin system according to claim 1 , wherein the at least one salt (S) is contained in the curing component.

6. The multi-component epoxy resin system according to claim 1 , wherein the aldehyde is formaldehyde and wherein the aldehyde precursor comprises trioxane or paraformaldehyde.

7. A method for the chemical fastening of construction elements in boreholes, the method comprising:
chemical fastening of the construction elements with a multi-component epoxy resin system according to claim 1 .

8. A cured compound prepared by curing the multi-component epoxy resin system according to claim 1 .

9. The multi-component epoxy resin system according to claim 1 , wherein the at least one salt (S) comprises calcium triflate or calcium nitrate, and wherein the at least one salt (S) is present in a proportion of from 1.0 to 10 wt. %, based on total weight of the curing composition.

10. The multi-component epoxy resin system according to claim 1 , wherein the salt is a triflate.

11. The multi-component epoxy resin system according to claim 1 , wherein the salt is a nitrate.

12. The multi-component epoxy resin system according to claim 1 , wherein the at least one salt (S) is other than a triflate of magnesium, calcium, zinc, or tin.

Assignees

• Hilti Ag

Inventors

• Behrens Nicole
• Bornschlegl Alexander

Classifications

• C04B40/0666

  Chemical plugs based on hydraulic hardening materials · CPC title

• C08G59/56 Primary

  together with other curing agents · CPC title

• C08K2003/287

  Calcium, strontium or barium nitrates · CPC title

• C08K3/28

  Nitrogen-containing compounds · CPC title

• C08G59/68 Primary

  characterised by the catalysts used · CPC title