FIELD: chemistry.
SUBSTANCE: present invention relates to use of a new combination of a compound of formula (I) and a compound of formula (II) in the molar ratio of 1:1 to 1:10 for adjusting the reactivity and gel time of the resin mixtures based on free-radically polymerizable compounds. Compounds of formula (I) and (II) correspond to the general formulas
in which R1 and R2 are each case independently hydrogen, a straight or branched C1-C8-alkyl group, and X is -OR3 o r-NR3 2, wherein R3 is a straight or branched C1-C8-alkyl group, R is a straight C1-C4-alkyl group or is -OR3, wherein R3 is a straight C1-C4-alkyl group, R′ is a branched C3-C4-alkyl group, and R″ is a branched C3-C4-alkyl group. Combination is a mixture of 2-(dimethylamino)pyrimidin-5-ol with 2,6-di(tert.butyl)-4-metilfenol; or 2-(dimethylamino)-4,6-dimethyl-pyrimidine-5-ol with 3,5-di(tert.butyl)-4-gidroksianizol or 4,6-dimethyl-2-(oktiloksi)pyrimidin-5-ol with 2,6-di(tert.butyl)-4-metilfenol. Present invention also relates to the use of the resin mixture to make mortar comprises at least one radically polymerizable compound selected from an ethylene unsaturated compound, and the said agent (combination) to control reactivity and gel time of the resin mixtures in an amount of 100 parts per million to 2.0 wt% calculated using a radically polymerizable compound. Invention also relates to reactive construction mortar from the mixture of the said resins which also contains inorganic inert additives and a solvent selected from lower alkilketones, di(lower alkyl) - lower alkanoilamides, lower benzenes, phthalic acid ethers, paraffins and water. Said mortar is used for a two-component system for obtaining cured construction mixture. Two-component system comprises the said reactive mortar from mixture of resins as component A and a curing agent selected from organic peroxide in water, and inorganic inert filling agents as component B; those are separated from each other to inhibit reactivity, and will create cured construction mixture when mixed. Said two-component system is used for chemical fixation of anchor elements.
EFFECT: reactive mortars based on the proposed combination are characterised by storage stability, exhibit a synergetic effect if gel time is adjusted and increased strength of anchorage.
14 cl, 2 tbl, 7 ex
