AQUEOUS CROSS-LINKING BINDING COMPOSITION AND COMPOSITION FOR COVERING, LACQUER SEALING AGENT COMPOSITION COMPRISING SUCH BINDING COMPOSITION Russian patent published in 2005 - IPC

FIELD: chemical technology.

SUBSTANCE: invention relates to a cross-linking binding composition based on an aqueous base comprising (A) an aqueous dispersion of hybrid resin based on polyester-polyacrylate that comprises 50-90 wt.-% of polyester and 10-50 wt.-% of polyacrylate. Hybrid resin is prepared by grafting the composition of unsaturated monomers polymerized by radical mechanism on partially unsaturated hydroxy-functional polyester; and (B) organic polyisocyanate wherein partially unsaturated hydroxy-functional polyester prepared by reaction of mixture of polycarboxylic acid and, optionally, monocarboxylic acids with one or some (cyclo)aliphatic alcohols wherein 0.5-6 mole% of acids and/or alcohols show the unsaturation level of ethylene type. The composition of unsaturated monomers polymerized by radical mechanism comprises a mixture of hydrophobic and hydrophilic monomers. Also, invention relates to a method for preparing composition used for covers comprising above said an aqueous binding composition and substrate with applied cross-linked cover prepared by applying such composition for cover. Invention provides preparing the composition with retaining exploitation indices as result of excessive foam formation and differing with acceptable values of working life and hardening rate.

EFFECT: valuable properties of composition.

16 cl, 3 tbl, 19 ex