CURING AGENT AND CURING ACCELERATOR WITH FIRE-RETARDANT ACTION FOR CURING EPOXY RESINS (II) Russian patent published in 2020 - IPC C07F9/40 C07F9/165 C10G59/00 

FIELD: chemistry.

SUBSTANCE: disclosed is a compound from a group of esters of phosphorus-containing acids according to formula (Ia)

in which the radicals R¹, R², R³, R⁶, X and indices m, n, simultaneously or independently, have values: R¹, R² = simultaneously or independently of each other, alkyl with 1–10 carbon atoms, R³ = aryl or -O-aryl with 3–20 carbon atoms, R⁶ = hydrogen or alkyl with 1–10 carbon atoms, X = oxygen or sulphur, m = 1, 2 or 3, n = 0, 1 or 2, wherein m + n = 3. Also disclosed is a composition for curing epoxy resins, a composition for accelerating curing epoxy resins, a composition of epoxy resins, use of the compound described above, as hardener for curable prepregs, laminates, coatings, mixtures of polymers, powder paints, sealants or adhesives, in each case including at least one epoxy resin, use of the compound described above, as curing accelerator of prepregs, laminates, coatings, mixtures of polymers, powder paints, sealants or adhesives, in each case including at least one epoxy resin and use of the compound described above, as a fire retardant in epoxy resins or in powder paints, sealants, adhesives or curable molding compounds, in each case including at least one epoxy resin.

EFFECT: technical result is the need to provide novel compounds which can be used to cure epoxy resins and epoxy resin compositions, particularly as curing agents and/or hardening accelerators which are included in epoxy compositions, additionally provide fire-retardant action, so that products obtained from or with a composition of epoxy resins, which can be classified as fire-resistant or flame-retardant, latent, and therefore have high stability during storage in epoxy resins below hardening temperature and high reactivity at curing temperature to ensure complete cross-linking of epoxy resin.

12 cl, 7 tbl, 10 ex