COATING COMPOSITION FOR CONCRETE SURFACE Russian patent published in 2004 - IPC

FIELD: polymer materials.

SUBSTANCE: invention relates to cold-curing compositions based on oligomer epoxide systems with reduced combustibility for coating concrete-supported poured floors to be applied in various areas including nuclear power stations. Composition contains epoxide component (A) including 4,4'-isopropylidenediphenol epoxide resin, reactive diluent, ethylhexanol monoglycidyl ether (Laproxid 301) as modifier, amine curing agent (B component), special-destination additives, and, additionally, polyoxypropylenepolyol diglycydyl ether (Laproxid 702) and/or polyoxypropylenepolyol triglycydyl ether (Laproxid 703) as part of component A, total percentage of epoxide groups in component A being 18-21.2%. Amine curing agent (B), in particular, is butyl acrylate-modified triethylenetetramine (DTB-2) or aminobenzylaniline, or mixture of two amines selected from: polyoxypropyleneamine DA-200 or DA-500, aminoethylpiperazine, triethyleneteramine, condensation products of phenol and polyamines obtained in presence of formaldehyde reacting as Mannich base, acrylonitrile-modified triethyleneteramine (UP-633M). Amount of curing agent is selected equal to 0.8-1 its stoichiometric amount. Composition is further supplemented by mineral filler in amount 100-180 parts of the total weight of components (A+B), in particular aluminum hydroxide and zinc borate at ratio (2-8,9):1 with 1% magnesium oxide. Composition may also contain, in amounts constituting 100 to 300% on the weight of mineral filler, inert fillers: quartz sand 0.1-0.8 mm fraction, broken glass or 0.1-0.8 mm glass bills, and special additives: bleaching agent, pigments, polymerization promoter. Cured composition shows following characteristics: tensile strength 15-20 MPa, adhesion to concrete 8.8-13.2 MPa for detachment and 4.4-6.2 MPa for shift, and Ce⁺⁺ deactivation behavior 55-120.

EFFECT: improved performance characteristics of coating composition.

5 cl, 4 tbl