FIELD: chemistry.
SUBSTANCE: claimed invention relates to cross-linked in meta positions phenolaldehyde resin, in which transverse bonds in meta positions are organic transverse bonds, formed by transition metal and organic fragments, bound to transition metal via at least four intermediate oxygen atoms, or transverse bonds in meta positions are inorganic bonds, including terminal parts, which contain rare earth element, and core, containing at least one transition metal, and each terminal part, containing rare earth element is bound to core, containing transition metal, by means of one or more O, N or S atoms. Also described is method of obtaining said cross-linked in meta positions phenolaldehyde resin, which includes combination of agent, cross-linking in meta positions, which contains transition metal or one or more source-compounds, capable of reacting with formation of such transition metal-containing cross-linking agent with phenolaldehyde resin, activated in meta positions by combination of phenolaldehyde resin with activator of meta positions, containing at least one rare earth element with at least one element of O, N and S, or with activator of meta positions, capable of substituting methylene bonds in phenolaldehyde resin with amine bonds, and having degree of incomplete cross-linking in ortho- and para-positions, equal to at least 2%, and transition metal-containing cross-linking agent represents organic compound, formed by transition metal and organic fragments, bound to transition metal via at least four intermediate oxygen atoms, or represents inorganic compound, including terminal parts, containing rare earth elements, and core, containing at least one transition metal, and each terminal part, containing rare earth element, is bound with transition metal-containing core by means of one or more O, N or S atoms. Described is proppant with resin coating, including particles of proppant substrate, covered with said cross-linked in meta positions phenolaldehyde resin. Described is material for obtaining proppant, containing residue, obtained by heating at temperature from 400°C to 600°C of said cross-linked in meta positions phenolaldehyde resin, obtained by formation in meta positions of inorganic transverse bonds, including terminal parts, which contain rare earth element, and core, which contains, at least, one transition metal, with each terminal part, which contains rare earth element, being bound with transition metal-containing core by means of one or more O, N or S atoms. Described is organometallic proppant, which includes proppant particles, including residue of decomposition of said phenolaldehyde resin, cross-linked in meta positions, and said residue of decomposition is obtained by heating at temperature from 400°C to 600°C to decompose cross-linked in meta positions phanolaldehyde resin, obtained by means of inorganic transverse bonds in meta-positions, including terminal parts, containing rare earth element, and core, containing at least one transition metal, and each terminal section, containing rare earth element, is bound with transition metal-containing core by means of one or more O, N and S atoms.
EFFECT: obtaining benzyl polymers, cross-linked in meta positions, obtaining based on them proppant, possessing improved crush strength, porosity and permeability.
35 cl, 8 dwg, 6 ex
