Reaction resin mortar curable by frontal polymerization and method for fixing anchor rods

Patent metadata

Field	Value
Publication number	US-10322970-B2
Application number	US-201415023317-A
Country	US
Kind code	B2
Filing date	Sep 19, 2014
Priority date	Sep 19, 2013
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

A reaction resin mortar curable by frontal polymerization is described, comprising at least one radically polymerizable compound (a), at least one thiol-functionalized compound (b) and at least one polymerization initiator (c), wherein the weight ratio of the at least one radically polymerizable compound (a) and the at least one thiol-functionalized compound (b) is in the range of 10:1 to 2:1 and wherein the polymerization initiator (c) is selected from compounds which can be thermally activated and/or thermally released at a temperature of above 30° C. and/or ammonium persulfates which are formed in-situ from at least one organically substituted ammonium salt and at least one inorganic persulfate as well as a method for fixing anchor rods, rebars or the like in bore holes using the reaction resin mortar.

First claim

The invention claimed is:

1. A reaction resin mortar curable by frontal polymerization, comprising:
at least one radically polymerizable compound (a);
at least one thiol-functionalized compound (b), wherein the thiol-functionalized group has at least two thiol groups; and
at least one polymerization initiator (c),
wherein the weight ratio of the at least one radically polymerizable compound (a) and the at least one thiol-functionalized compound (b) is in the range of 10:1 to 2:1 and
wherein the polymerization initiator (c) is selected from the group consisting of compounds which can be thermally released at a temperature of 30° C.; a combination of at least one organically substituted ammonium salt and at least one inorganic persulfate, wherein the at least one organically substituted ammonium salt and the at least one inorganic persulfate form an ammonium persulfate when reacted in situ; and mixtures thereof.

2. The reaction resin mortar according to claim 1 ,
wherein the polymerization initiator (c) is a combination of at least one organically substituted ammonium salt and at least one inorganic persulfate, and
wherein the at least one organically substituted ammonium salt and the at least one organic persulfate are present separately in a reaction inhibiting manner such that the organically substituted ammonium persulfate is formed only after mixing the at least one organically substituted ammonium salt and the at least one organic persulfate.

3. The reaction resin mortar according to claim 2 , wherein the at least one organically substituted ammonium salt is selected from the group consisting of a tri or tetra alkyl, aryl or aryl-alkyl ammonium halide, acetate, (hydrogen)carbonate, (hydrogen)phosphate, (hydrogen)sulfate, (meth)acrylate, and mixtures thereof.

4. The reaction resin mortar according to claim 2 , wherein the at least one inorganic persulfate is selected from the group consisting of ammonium, potassium or sodium persulfate, and mixtures thereof.

5. The reaction resin mortar according to claim 1 , which also contains a polymerization accelerator (d).

6. The reaction resin mortar according to claim 5 , wherein the polymerization accelerator (d) is selected from amines, sulfides, thiourea or mercaptans and/or metal compounds.

7. The reaction resin mortar according to claim 5 , wherein the polymerization accelerator (d) is contained in a quantity of 0.01 to 1 wt %.

8. The reaction resin mortar according to claim 1 , which also contains inorganic and/or organic aggregates.

9. The reaction resin mortar according to claim 8 , wherein the aggregate is selected from fillers and/or additives.

10. The reaction resin mortar according to claim 9 , wherein the aggregate is contained in a quantity of up to 60 wt %.

11. The reaction resin mortar according to claim 1 , which contains 10 to 98 wt % of a mixture of the at least one radically polymerizable compound (a) and the at least one thiol-functionalized compound (b).

12. The reaction resin mortar according to claim 1 , which contains 2 to 30 wt % of the polymerization initiator (c).

13. The reaction resin mortar according to claim 1 , which contains, as the polymerization initiator (c), a peroxide and/or an azo compound, which, optionally in the presence of a polymerization accelerator (d), each have a half-life period t 1/2 in the range between 1 and 200 minutes at a temperature of 100° C. in chlorobenzene.

Assignees

• Hilti Ag

Inventors

• Buergel Thomas
• Pfeil Armin

Classifications

• C04B2111/00715

  for fixing bolts or the like · CPC title

• C08K5/37

  Thiols · CPC title

• C08F2/38

  Polymerisation using regulators, e.g. chain terminating agents {, e.g. telomerisation} · CPC title

• C04B26/02

  Macromolecular compounds · CPC title

• C04B2103/0047

  as a mixture of nonomers and prepolymers or oligomers · CPC title