Reaction Resin Mortar Curable by Frontal Polymerization and Method for Fixing Anchor Rods

Patent metadata

Field	Value
Publication number	US-2016236983-A1
Application number	US-201415023317-A
Country	US
Kind code	A1
Filing date	Sep 19, 2014
Priority date	Sep 19, 2013
Publication date	Aug 18, 2016
Grant date	—

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

1 . A reaction resin mortar curable by frontal polymerization, 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 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 released at a temperature of 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.

2 . 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).

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

4 . The reaction resin mortar according to claim 1 , which contains an ammonium persulfate as the polymerization initiator (c), 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 the mixing thereof.

5 . The reaction resin mortar according to claim 4 , which contains, as an organically substituted ammonium salt, a tri or tetra alkyl, aryl or aryl-alkyl ammonium halide, acetate, (hydrogen)carbonate, (hydrogen)phosphate, (hydrogen)sulfate, (meth)acrylate or mixtures of these compounds.

6 . The reaction resin mortar according to claim 4 , which contains, as an inorganic persulfate, ammonium, potassium or sodium persulfate or mixtures of these compounds.

7 . 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.

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

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

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

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

12 . The reaction resin mortar according to claim 8 , wherein the polymerization accelerator (d) is selected from amines, sulfides, thiourea or mercaptans and/or metal compounds.

13 . The reaction resin mortar according to claim 8 , wherein the polymerization accelerator (d) is contained in a quantity of 0.01 to 1 wt %.

14 . A method for fixing anchor rods, rebars or the like in bore holes of different subgrades, wherein the reaction resin mortar according to at least one of the preceding claims is introduced into the bore hole, the anchor rod, the rebar or the like are inserted and the frontal polymerization is triggered by heating the reaction resin mortar to a temperature above the reaction temperature of the polymerization initiator or of the polymerization accelerator.

15 . The method according to claim 13 for fixing anchor rods, rebars or the like in hollow subgrades.

16 . The method according to claim 14 , wherein the polymerization of the reaction resin mortar is triggered by selective or extensive heating of the surface layer or in the inside the mortar mass.

17 . The method according to claim 14 , wherein the polymerization of the reaction resin mortar is triggered by the supply of heat via the fixing element.

18 . The method according to claim 14 , wherein the selective or extensive heating takes place with the aid of a flame, a soldering tip, a heating wire, a hot air fan, an induction oven, a flash of light, a laser beam and/or in-situ by a chemical reaction.

Assignees

• Hilti Ag

Inventors

• Buergel Thomas
• Pfeil Armin

Classifications

• C08F2/38

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

• C04B2103/0047

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

• C04B2111/00715

  for fixing bolts or the like · CPC title

• C04B26/02

  Macromolecular compounds · CPC title

• C08K5/37

  Thiols · CPC title