Hydrophilic coatings including a base coat layer and a top coat layer wherein at least one of the base coat and top coat compositions that form the hydrophilic coatings comprises a diacrylate compound have a number average molecular weight less than 1000.

A porous polyimide film is provided to suppress an increase in a dielectric loss tangent even when immersed in water. In the porous polyimide film, a difference between a dielectric loss tangent T1 after being left to stand for 24 hours under an atmosphere of 25° C. and relative humidity of 50% and a dielectric loss tangent T2 after immersion in water for 24 hours under an atmosphere of 25° C. is 0.0030 or less.

Described herein is a solution including at least one sulfone polymer, at least one water-soluble polymer, and gamma-valerolactone. Also described herein is a process of making a membrane using the solution, and a method of using the membrane for water ultrafiltration and/or dialysis.

It is an object of the present invention to provide a thickener capable of exhibiting excellent light resistance. The present invention relates to a thickener comprising cellulose fibers having a fiber width of 8 nm or less and water, wherein the thickener is a slurry or a gel, and when the thickener is filled in a colorless and transparent glass cell having an inside dimension of 1 cm in depth×4 cm in width×4.5 cm in height and the thickener is then irradiated with ultraviolet rays with a wavelength of 300 nm or more and 400 nm or less, using a xenon lamp, from the side of the maximum area surface of the glass cell, so as to be an irradiance of 180 W/m.sup.2 and an integrated light amount of 500 mJ/m.sup.2, the amount of a change in the yellowness before and after ultraviolet irradiation measured in accordance with JIS K 7373 is 10 or less.

Methods and hydrogels for preventing or reducing cellular adhesion and protein adsorption to a tissue (e.g. cardiac tissue) are disclosed. The hydrogels generally include at least two component polymers, a first polymer including an aminooxy group and a second polymer including a reactive oxo group, that are cross-linked by oxime bonds. The hydrogels are suitable for binding to and coating a tissue or cell. The hydrogels operate to reduce cellular adhesions and protein adsorption to the tissue or cell.

The present invention relates to a fluorine-containing resin composition, and a resin vanish, a fluorine-containing dielectric sheet, a laminate, a copper clad laminate and a printed circuit board containing the same. The fluorine-containing resin composition comprises 30 wt. %-70 wt. % of a fluorine-containing polymer, 30 wt. %-70 wt. % of an inorganic filler which includes the following particle size distribution: D10 is greater than 1.5 μm; and D50 is 10-15 μm. In the present invention, the selection of an inorganic filler with a specific particle size distribution can ensure that the boards prepared by the fluorine-containing resin composition have excellent dielectric properties and voltage resistance performance, even if the inorganic filler is added in a large amount.

A rubber additive composition may be capable of producing a rubber composition having well-balanced strength. Such rubber additive compositions may include: (A) anion-modified cellulose and (B) a hydrophobizing agent, wherein the hydrophobizing agent (B) includes at least one selected from the group consisting of (B1) a polyether amine having a primary amino group at an end of a polyether skeleton and (B2) an amine compound having a hydrocarbon group with a carbon number of 3 to 50 or a quaternary ammonium salt having a hydrocarbon group with a carbon number of 3 to 50.

Provided is a liquid crosslinking agent in which liquid life (pot life) as an undiluted solution is sufficiently long and excellent coating properties are exhibited when used. A liquid crosslinking agent containing an epoxy compound and an emulsifier, in which a content of water is 39% by mass or less with respect to a total amount of a liquid, and a contact angle with respect to a poly(ethylene-methacrylic acid) film when preparing an aqueous dispersion in which a concentration of a non-volatile component is 15% by mass is 42.0° or less. It is preferable that the epoxy compound has two or more epoxy groups in molecules, and it is preferable that the emulsifier is a nonionic surfactant. Provided is a coating method of a liquid crosslinking agent including diluting the liquid crosslinking agent with water to be used for coating.

A polyimide precursor-containing aqueous composition contains at least one polymer material selected from the group consisting of a water-insoluble fibrous organic substance and a polyalkylene oxide having a viscosity-average molecular weight of 5 million or more, a polyimide precursor, particles, and water.

An expanded polyolefin resin particle is obtained by expanding a polyolefin resin particle using water and/or an inorganic gas as a foaming agent. The polyolefin resin particle includes a polyolefin resin, a product obtained by heating and kneading a mixture, and a water absorbing substance, wherein the mixture includes a first polypropylene resin, a polypropylene wax, a polyorganosiloxane including at least one silicon-atom-bound radical polymerizable functional group per molecule, and an organic peroxide.