Inhibitor combination, resin mixture containing same and use of same

Abstract

The use of a mixture of 5-pyrimidinol derivatives with sterically hindered phenol derivatives for adjusting the reactivity and the gel time of resin mixtures and reactive resin mortars based on radically polymerizable compounds is described. Furthermore, a resin mixture containing the inhibitor combination, a reactive resin mortar containing this resin mixture and two-component mortar systems with the reactive resin mortar according to the invention and a hardener with improved stability in storage and good low-temperature hardening properties are also described. The resin mixture according to the invention is suitable in particular for chemical fastening of construction elements in boreholes in various substrates.

1 . A method of adjusting the reactivity and the gel time of resin mixtures based on radically polymerizable compounds, comprising adding a combination of a compound of general formula (I): 
       
         
           
           
               
               
           
         
       
       wherein R 1  and R 2  independently of one another denote hydrogen or a branched or unbranched C 1 -C 20  alkyl group, X is —OR 3  or —NR 3   2 , where R 3  is a branched or unbranched C 1 -C 20  alkyl group or a C 2 -C 4  polyalkylene oxide group, with a compound of general formula (II) 
       
         
           
           
               
               
           
         
       
       wherein R denotes hydrogen, a branched or unbranched C 1 -C 18  alkyl group or —OR 3  or —NR 3   2 , where R 3  denotes a branched or unbranched C 1 -C 20  alkyl group, R′ is hydrogen, a branched or unbranched C 1 -C 18  alkyl group and R″ is a branched or unbranched C 1 -C 18  alkyl group, for adjusting the reactivity and the gel time of resin mixtures based on radically polymerizable compounds. 
     
     
         2 . The method according to  claim 1 , wherein R 1  and R 2  in formula (I), independently of one another, are hydrogen or a branched or unbranched C 1 -C 8  alkyl group. 
     
     
         3 . The method according to  claim 2 , wherein R 1  and R 2  in formula (I), independently of one another are hydrogen or methyl. 
     
     
         4 . The method according to  claim 3 , wherein the compound of formula (I) is 2-(dimethylamino)pyrimidin-5-ol, 2-(dimethylamino)-4,6-dimethylpyrimidin-5 -ol or 4,6-dimethyl-2-(octyloxy)pyrimidin-5-ol. 
     
     
         5 . The method according to  claim 1 , wherein the compound of formula (II) is 2,6-di-tert-butyl-4-methylphenol or 2,6-di-tert-butyl-4-hydroxyanisole. 
     
     
         6 . (canceled) 
     
     
         7 . The method according to  claim 1 , wherein the molar ratio of the component of formula (I) to the compound of formula (II) is 1:1 to 1:10. 
     
     
         8 . A resin mixture comprising at least one radically polymerizable compound, optionally a reactive diluent and an agent for adjusting the reactivity and the gel time, wherein the agent for adjusting the reactivity and the gel time is a combination of a compound of general formula (I) 
       
         
           
           
               
               
           
         
       
       wherein R 1  and R 2  independently of one another denote hydrogen or a branched or unbranched C 1 -C 20  alkyl group, and X is —OR 3  or —NR 3   2 , where R 3  is a branched or unbranched C 1 -C 20  alkyl group or a C 2 -C 4  polyalkylene oxide group, with a compound of general formula (II) 
       
         
           
           
               
               
           
         
       
       wherein R denotes hydrogen, a branched or unbranched C 1 -C 18  alkyl group or —OR 3  or —NR 3   2 , where R 3  denotes a branched or unbranched C 1 -C 20  alkyl group, R′ is hydrogen, a branched or unbranched C 1 -C 18  alkyl group and R″ is a branched or unbranched C 1 -C 18  alkyl group. 
     
     
         9 . The resin mixture according to  claim 8 , wherein R 1  and R 2  in formula (I) independently of one another are hydrogen or a branched or unbranched C 1 -C 8  alkyl group. 
     
     
         10 . The resin mixture according to  claim 9 , wherein R 1  and R 2  in formula (I) independently of one another are hydrogen or methyl. 
     
     
         11 . The resin mixture according to  claim 10 , wherein an agent (c) for adjusting the reactivity and the gel time is 2-(dimethylamino)pyrimidin-5-ol, 2-(dimethylamino)-4,6-dimethylpyrimidin-5-ol or 4,6-dimethyl-2-(octyloxy)pyrimidin-5-ol. 
     
     
         12 . The resin mixture according to  claim 8 , wherein the compound of formula (II) is 2,6-di-tert-butyl-4-methylphenol or 2,6-di-tert-butyl-4-hydroxyanisole. 
     
     
         13 . (canceled) 
     
     
         14 . The resin mixture according to  claim 8 , wherein the molar ratio of the component of formula (I) to the compound of formula (II) is 1:1 to 1:10. 
     
     
         15 . The resin mixture according to  claim 8 , wherein the resin mixture also contains an accelerator for the curing agent. 
     
     
         16 . A reactive resin mortar, comprising the resin mixture according to  claim 8  and inorganic additives. 
     
     
         17 . A two-component mortar system, comprising the reactive resin mortar according to  claim 16  as component A and a hardener arranged separately to inhibit reaction as component B. 
     
     
         18 . The two-component mortar system according to  claim 17 , wherein the hardener contains an organic or inorganic peroxide as the curing agent. 
     
     
         19 . The two-component mortar system according to  claim 17 , wherein the hardener also contains inorganic additives. 
     
     
         20 . The two-component mortar system according to  claim 17 , wherein component A additionally contains a hydraulically setting or polycondensable inorganic compound in addition to the reactor resin mortar and component B additionally contains water in addition to the curing agent. 
     
     
         21 . A method of chemical fastening comprising applying the two-component mortar system according to  claim 17  for chemical fastening. 
     
     
         22 . A shell, cartridge or film bag containing a two-component mortar system according to  claim 17  comprising two or more separate chambers in which the reactive resin mortar and/or hardener is/are arranged. 
     
     
         23 . The resin mixture of  claim 8  wherein the resin mixture further comprises a reactive diluents and an agent for adjusting the reactivity and the gel time.