Jsr Corporation

Minoru Katou

Katsuhiko Tsuruoka

Takeshi Mogi

An aqueous coating composition useful as a floor polishing agent is disclosed. The composition comprises (A) an aqueous dispersion of a copolymer obtained by the emulsion polymerization of (a) an ethylenically unsaturated carboxylic acid monomer, (b) a (meth)acrylic acid alkyl ester monomer, and (c) other monomers polymerizable with the monomers (a) and (b), (B) an unsaturated monomer curable with energy rays, and (C) a photoinitiator. The floor polishing agent containing the aqueous coating composition exhibits excellent delamination properties and dry buff applicability.

Aqueous coating composition and floor polishing composition

Composite particles capable of forming a coating excelling in weatherability and, in particular, stain-proof characteristics, a composite particle dispersion composition containing the composite particles and excelling in film formability, and a method of preparing the composite particle dispersion composition. The composite particles contain (i) polymer particles having 2-70 wt % of a polymer phase (a) of the core and 98-30 wt % of a polymer phase (b) of the shell, and (ii) a polymer of at least either an organosilicon compound or organometallic compound present at least either on or near the surface of the polymer phase (b), wherein the polymer phase (a) and the polymer phase (b) have different monomer compositions.

Composite particles, composite particle dispersion composition, and method of preparing composite particle dispersion composition

An aqueous coating composition comprising (A) an aqueous dispersing material which is a copolymer having a glass transition temperature (Tg) of 80&deg; C. or less which is obtained by the copolymerization a specific unsaturated carboxylic acid, (meth)acrylic acid alkyl ester, and other monomers and (B) a specific aminoalcohol compound in a specific proportion. The aqueous coating composition is safe due to absence of heavy metals, produces excellent gloss and has a fine external appearance when coated, and exhibits superior durability and water resistance which are represented by black heel mark resistance and anti-scuff properties. The composition is particularly useful as a floor coating material.

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Tokyo, Japan

Minoru Katou