The present invention is a composition comprising an aqueous dispersion of metal oxide pigment particles coated with a polymer comprising structural units of an alkyltrihydroxysilane or a salt thereof and a dialkyldihydroxysilane or a salt thereof. The composition of the present invention provides hydrophobicity to pigment particles, thereby imparting water resistance, and allows for high loadings of pigment in water without increased viscosity.

Provided are: coated flaky titanic acid particles, which can form a design coating film with a good silky texture and shadowed appearance when flaky titanic acid is applied to an organic solvent-based paint and, which can also sufficiently suppress discoloration (yellowing) of the coating film even in a relatively severe environment, such as prolonged exposure to ultraviolet light; and a production method therefor.

The surface of the flaky titanic acid particles has an oxide and/or hydroxide of aluminum, and an anionic surfactant present thereon. Preferably, the anionic surfactant is a hydrocarbon-based anionic surfactant having 5 or more carbon atoms in the main chain or a fluorinated anionic surfactant having 4 or more carbon atoms. Said production method comprises: a step for maintaining an aqueous slurry, which contains flaky titanic acid particles and an aluminum source, at a temperature of 50-95 C. inclusive and at a pH of 5-12 inclusive to treat the surface of the flaky titanic acid particles with an oxide and/or hydroxide of aluminum; and a subsequent step for mixing the obtained flaky titanic acid and an anionic surfactant in a solution.

The present disclosure relates to the technical field of pigment dispersing agents, and provides an acrylate comb dispersing agent and a preparation method and use thereof, and a white ink-jet color paste and a preparation method thereof. The dispersing agent provided by the present disclosure is similar to a comb in structure and is synthesized from a hydrophobic monomer (comb handle) and a hydrophilic macromonomer (comb teeth). The acrylate comb dispersing agent provided by the present disclosure is good in dispersity, capable of stably dispersing titanium dioxide, relatively low in molecular weight and capable of meeting the requirements of ink-jet ink. The white ink-jet color paste provided by the present disclosure is strong in stability and low in viscosity, is not easy to settle and flocculate, and meets the requirements of the ink-jet ink.

This invention provides a polymer thick film dielectric paste composition, comprising a mixture of titanium dioxide and boron nitride powders, a resin blend of polyol and phenoxy resin, one or more additives selected from the group consisting of a linear aliphatic polyester, a block copolymer, a blocked aliphatic polyisocyanate, and a wetting and dispersing agent, and one or more polar, aprotic solvents. The paste composition may be used to form polymer thick film dielectric layers in electrical circuits subject to thermoforming and in articles requiring stretchable dielectric layers such as wearables.

A wetting agent according to Formula (I): ##STR00001## wherein R.sup.1 is selected from a branched alkyl group or linear alkyl group or a cycloaliphatic group or an aromatic group, each having 6 to 15 carbon atoms; R.sup.2 is selected from hydrogen, methyl, or ethyl; R.sup.3 is selected from hydrogen, methyl, or ethyl; R.sup.4 is selected from hydrogen, methyl, or ethyl; R.sup.5 is selected from methyl or ethyl; x ranges from 0 to 5; y ranges from 0 to 10; z ranges from 1 to 10; with the proviso that when x ranges from 1 to 5, R.sup.2 is different from R.sup.3; and with the proviso that when x=0, R.sup.3 is different from R.sup.4. The wetting agent also imparts anti-foam properties to aqueous solutions while reducing surface tension.

A method for increasing a detection distance of a surface of an object illuminated by near-IR electromagnetic radiation, including: (a) directing near-IR electromagnetic radiation from a near-IR electromagnetic radiation source towards an object at least partially coated with a near-IR reflective coating that increases a near-IR electromagnetic radiation detection distance by at least 15% as measured at a wavelength in a near-IR range as compared to the same object coated with a color matched coating which absorbs more of the same near-IR radiation, where the color matched coating has a E color matched value of 1.5 or less when compared to the near-IR reflective coating; and (b) detecting reflected near-IR electromagnetic radiation reflected from the near-IR reflective coating. A system for detecting proximity of vehicles is also disclosed.

Provided are surface-modified inorganic compound particles having excellent dispersibility in a water soluble organic solvent, and also having excellent chemical stability in water.

Provided are Surface-modified particles, in which a surface of inorganic compound particle is modified with a compound represented by the following formula (1) or a salt thereof.

##STR00001##

[In formula (1), R.sup.1 represents an alkyl group having 1 to 4 carbon atoms or an alkenyl group having 2 to 4 carbon atoms.]

An aqueous polyurethane resin having a cationic group in a side chain thereof is obtainable by reacting a polyester polyol, a polyisocyanate, and a diol containing a quaternary N-atom or amino group, the quaternary N-atom or amino group being not present in the carbon chain between the two hydroxyl groups of the diol. The polyester polyol is obtained by reacting an aromatic polycarboxylic acid and a polyol. The polyurethane resin is suitable as a resin in treatment liquids for inkjet printing.

A liquid set for inkjet recording, includes (i) an aqueous treatment liquid including a polyurethane resin obtainable by reacting a polyester polyol, a diol containing a quaternary N-atom or tertiary amino group, and a polyisocyanate, wherein the quaternary N-atom or tertiary amino group is present in a side chain of the carbon chain linking the two hydroxyl groups of the diol, and the polyester polyol is obtained by reacting a polyol and an aromatic polycarboxylic acid; and (ii) an aqueous inkjet ink including a colorant. A method for inkjet printing includes using the liquid set.

An aqueous polyurethane resin dispersion includes a cationic group and a polyalkylene oxide in a side chain thereof. The polyurethane resin is obtainable by reacting a polyester polyol, a polyether diol, a polyol containing a quaternary N-atom or tertiary amino group, and a polyisocyanate. The polyester polyol is obtained by reacting an aromatic polycarboxylic acid and a polyol. The polyurethane resin is suitable as a resin in treatment liquids of substrates and images made by inkjet printing.