A method for manufacturing a water-based coating material is provided, including: (a) reacting tetraalkoxysilane, acidic aqueous solution of vanadium salt, and trialkoxyalkylsilane to form an oligomer; (b) reacting the oligomer with colloidal silica particles to form a modified oligomer; and (c) reacting the modified oligomer with trialkoxyepoxysilane to obtain a water-based coating material.

Compositions, devices, and methods are disclosed for the modification of polymer surfaces with coatings having a dispersion of silicone polymer and hydrophobic silica. The surface coatings provide the polymer surface with high hydrophobicity, as well as increased resistance to biofouling with proteinaceous material. The polymer surfaces can be particularly useful in microfluidic devices and methods that involve the contacting of the covalently modified polymer surfaces with emulsions of aqueous droplets containing biological macromolecules within an oil carrier phase.

Compositions, devices, and methods are disclosed for the modification of polymer surfaces with coatings having a dispersion of silicone polymer and hydrophobic silica. The surface coatings provide the polymer surface with high hydrophobicity, as well as increased resistance to biofouling with proteinaceous material. The polymer surfaces can be particularly useful in microfluidic devices and methods that involve the contacting of the covalently modified polymer surfaces with emulsions of aqueous droplets containing biological macromolecules within an oil carrier phase.

Aqueous antimicrobial coating compositions are disclosed comprising at least one organosilane homopolymer, present as a distribution of polymer chain lengths, and optionally at least one amine. A method of preparing an antimicrobial coating comprises coating a surface with the aqueous antimicrobial coating composition and allowing the composition to dry into a film that exhibits residual antimicrobial efficacy against microorganisms even after mechanical abrasion of the coating. The organosilane homopolymer may comprise only 3-aminopropylsilanetriol homopolymer, mixtures of 3-aminopropylsilanetriol homopolymer, 3-chloropropylsilanetriol homopolymer and 3-(trihydroxysilyl)propyl dimethyloctadecyl ammonium chloride homopolymer, or any one of various unique organosilane homopolymers having multiple amine functionality.

An aqueous antimicrobial coating composition capable of forming an antimicrobial coating on a surface comprises at least two organosilanes, each of the at least two organosilanes having a structure, RSi(OR).sub.3 wherein R=(CH.sub.2).sub.3Y; Y=.sup.+N(CH.sub.3).sub.2(C.sub.18H.sub.37)X.sup.; .sup.+N(CH.sub.3).sub.2(C.sub.14H.sub.29)X.sup.; .sup.+N(C.sub.10H.sub.21).sub.2(CH.sub.3)X.sup.; Cl or NH.sub.2; X.sup.=halide, sulfate, nitrate, phosphate, carbonate, organic sulfonate, organic carbonate, BF.sub.4.sup., or ClO.sub.4.sup.; and R=H, methyl or ethyl, or a C.sub.3-C.sub.6 straight-chained, branched or cyclic alkyl group, with the proviso that the organosilane RSi(OR).sub.3 having the C.sub.3-C.sub.6 straight-chained, branched or cyclic alkyl group hydrolyzes in the aqueous antimicrobial coating composition to RSi(OH).sub.3.

An aqueous antimicrobial coating composition capable of forming an antimicrobial coating on a surface comprises at least two organosilanes, each of the at least two organosilanes having a structure, RSi(OR).sub.3 wherein R=(CH.sub.2).sub.3Y; Y=.sup.+N(CH.sub.3).sub.2(C.sub.18H.sub.37)X.sup.; .sup.+N(CH.sub.3).sub.2(C.sub.14H.sub.29)X.sup.; .sup.+N(C.sub.10H.sub.21).sub.2(CH.sub.3)X.sup.; Cl or NH.sub.2; X.sup.=halide, sulfate, nitrate, phosphate, carbonate, organic sulfonate, organic carbonate, BF.sub.4.sup., or ClO.sub.4.sup.; and R=H, methyl or ethyl, or a C.sub.3-C.sub.6 straight-chained, branched or cyclic alkyl group, with the proviso that the organosilane RSi(OR).sub.3 having the C.sub.3-C.sub.6 straight-chained, branched or cyclic alkyl group hydrolyzes in the aqueous antimicrobial coating composition to RSi(OH).sub.3.

A coating composition comprising (A) inorganic oxide fine particles, (B) a hydrolyzable group-containing organic silicon compound, (C) water or an acid aqueous solution, (D) a curing catalyst and (E) an organic solvent, wherein the inorganic oxide fine particles (A) contain 100 parts by mass of (A1) first inorganic oxide fine particles containing not less than 50 mass % of a zirconium oxide component and 0.1 to 90 parts by mass of (A2) cerium oxide fine particles. This coating composition is used to form a hard coat film.

A coating composition comprising (A) inorganic oxide fine particles, (B) a hydrolyzable group-containing organic silicon compound, (C) water or an acid aqueous solution, (D) a curing catalyst and (E) an organic solvent, wherein the inorganic oxide fine particles (A) contain 100 parts by mass of (A1) first inorganic oxide fine particles containing not less than 50 mass % of a zirconium oxide component and 0.1 to 90 parts by mass of (A2) cerium oxide fine particles. This coating composition is used to form a hard coat film.

Provided are a photocatalyst transfer film allowing a photocatalyst layer that is uniform, highly transparent, and exhibits an antimicrobial property in dark places to be transferred to the surfaces of various transfer base materials; and a production method thereof. The photocatalyst transfer film has, on a base film, a photocatalyst layer containing a titanium oxide particle-containing photocatalyst, antimicrobial metal-containing alloy particles, a silicon compound and a surfactant. The production method of the photocatalyst transfer film includes applying a photocatalyst coating liquid to a base film; and performing drying. The photocatalyst coating liquid contains a titanium oxide particle-containing photocatalyst, antimicrobial metal-containing alloy particles, a silicon compound, a surfactant and an aqueous dispersion medium.

Compositions, devices, and methods are disclosed for the modification of polymer surfaces with coatings having a dispersion of silicone polymer and hydrophobic silica. The surface coatings provide the polymer surface with high hydrophobicity, as well as increased resistance to biofouling with proteinaceous material. The polymer surfaces can be particularly useful in microfluidic devices and methods that involve the contacting of the covalently modified polymer surfaces with emulsions of aqueous droplets containing biological macromolecules within an oil carrier phase.