Ultraviolet-absorbing resin, aqueous resin emulsion, resin composition, aqueous resin emulsion composition and use thereof, and aqueous polyurethane emulsion

Abstract

Regarding the present inventions I to VII, an aqueous emulsion of ultraviolet-absorbing resin obtained by neutralizing a solution of an ultraviolet-absorbing resin (i), which is obtained by reacting a polyester polyol (A) having an ultraviolet-absorbing group, a compound (C) containing an ionic or a nonionic surface active group, an organic polyisocyanate (D), and a polyol (B) added according to need, in the presence of an organic solvent (s) if necessary, with a neutralizing agent (E), dispersing in water, and removing a solvent, has excellent compatibility with other resins such as an acrylic resin (iia) and/or an urethane resin (iiu), imparts excellent light resistance without impairing favorable properties of the other resin, can improve a compounding stability to an aqueous emulsion of the other resin, shows less bleedout of the ultraviolet-absorbing resin on a surface of a coating film obtained from the emulsion, imparts stable light resistance to the other resin over a long period of time, and can impart excellent alkali resistance and solvent resistance to other resin having poor alkali resistance or solvent resistance. Therefore, the emulsion can be used for coating artificial leather, plastics, woody material or the like. Regarding Invention VIII, an aqueous polyurethane emulsion, constituted of a polyester diol (VIIIA) containing at least one diol selected from the group consisting of 2-n-butyl-2-ethyl-1,3-propanediol, 2,2-diethyl-1,3-propanediol, and 2,4-diethyl-1,5-pentanediol, ε-caprolactone, and adipic acid, as an at least one structural component unit; a chain extender (VIIIB); a compound (C) containing an ionic and/or nonionic surface active group; an organic polyisocyanate (D); and a neutralizing agent (E), is an aqueous polyurethane emulsion using a polyester diol, but in spite of this, an artificial leather obtained from the same has excellent flexibility, light resistance, hydrolysis resistance and heat resistance.

Dependencies are inferred from the claim text.