FIELD: binding agents.
SUBSTANCE: invention describes a binding agent based on an aqueous basis consisting of: (a) acrylic copolymer an aqueous dispersion comprising functional groups of carboxylic acid and ethyleneurea with average molecular mass below 200000Da and value Tglass < -15°C. This acrylic copolymer can be prepared from acrylic and/or methacrylic acid alkyl and/or cycloalkyl ester with ethylene unsaturated group or its anhydride, compound with ethylene unsaturated group comprising functional groups ethyleneurea of the formula: 
, and optionally vinyl monomers and/or halides, or nitriles with olefin unsaturated group, and (b) water-soluble complex of transient metal wherein transient metal is represented by zinc and wherein the ratio of transient metal mole number in the complex to the total mole number of carboxyl groups in copolymer is from 1:1 to 1:8 but preferably from 1:2 to 1:4. Also, invention describes a covering composite prepared from the described composition of binding agent and wood as a basis covered by a covering composite. Proposed covering composite and coatings with this composition of a binding agent possess the excellent strength and good flexibility. These coatings show the property for prevention of tannins migration from the tannin-containing wood basis.
EFFECT: improved and valuable properties of composition.
9 cl, 11 ex
