MODIFIED FORMALDEHYDE RESIN FOR PROTECTION OF OIL FIELD AND PETROCHEMICAL EQUIPMENT, ISOLATION AND STRENGTHENING OF WELLS Russian patent published in 2000 - IPC

FIELD: oil-producing and petrochemical industries. SUBSTANCE: modified formaldehyde resin contains formaldehyde and epoxy resins and additionally provided with formalin, diethyleneglycol, product of reaction of glycerin with isobutyl aldehyde or butyraldehyde, dioctylphthalate, butyl benzyl phthalate, epichlorohydrin and higher isomeric alpha-branched monocarboxylic acids of C₅-C₂₈ fraction with the following ratio of components, wt.%: 60-% alcohol solution of novolac phenol-formaldehyde resin, 59-63; epoxydiane resin, 23-26; formalin, 10-11; diethyleneglycol, 2.0-2.5; product of reaction of glycerin with isobutyl aldehyde, 0.3-0.5; dioctylphthalate, 0.15-0.2; butyl benzyl phthalate, 0.15-0.2; epichlorohydrin, 0.2-0.3; isomeric alpha-branched monocarboxylic acid of C₅-C₂₈ fraction, 0.2-0.3. EFFECT: higher resistance of composition to action of corrosive media. 3 cl, 2 tbl, 6 ex