The present invention relates to a piezoelectric material, comprising: a vinylidene fluoride/trifluoroethylene copolymer; and a (meth)acrylic polymer which contains a structural unit derived from a (meth)acrylic monomer represented by Formula (I):

##STR00001## [wherein, R.sub.1 represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, wherein at least one hydrogen atom of R.sub.1 is optionally substituted with a halogen atom; and R.sub.2 represents a linear or branched alkyl group having 1 to 10 carbon atoms, an alicyclic hydrocarbon group having 3 to 12 carbon atoms which contains an alicyclic structure having 3 to 6 carbon atoms, a phenyl group, or a phenylalkylene group which contains an alkylene group having 1 to 4 carbon atoms, wherein, at least one carbon atom of the alkyl group, the alicyclic hydrocarbon group, the phenyl group, and the phenylalkylene group is optionally substituted with —O—, —N—, or —S—, at least one hydrogen atom of the alkyl group, the alicyclic hydrocarbon group, and the alkylene group is optionally substituted with a hydroxy group, an alkyl group having 1 to 6 carbon atoms, and/or an alkoxy group having 1 to 6 carbon atoms, at least one hydrogen atom on the phenyl rings of the phenyl group and the phenylalkylene group is optionally substituted with a hydroxy group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, and/or a cyano group, and at least one hydrogen atom of R.sub.2 is optionally substituted with a halogen atom, with a proviso that at least one hydrogen atom of R.sub.1 and/or R.sub.2 is substituted with a halogen atom.

The present invention provides a release hard coating, comprising a bottom hard coating component and a top release coating component, wherein the bottom hard coating component comprises a crosslinked polymer matrix and nano-silica particles; and the top release coating component comprises a release polymer capable of having a grafting reaction with the bottom hard coating component. The release hard coating can be applied onto a substrate such as PET to resist sticky illegal advertisements and protect the substrate from wear.

The present invention provides a window film, a manufacturing method thereof, and a display device including the same. The window film comprises: a basic material layer; a window coating layer formed on one surface of the basic material layer; and a back coating layer formed on the other surface of the basic material layer, wherein the window film has a relation of formula 1.

Some polymeric devices, as described herein, can be made of a first layer and a second layer bonded together with one or more microfluidic channels defined internal to the device. The first layer and the second layer may each include a substrate and a polymer bonded to the substrate. The two layers may be bonded through a polymer network that interpenetrates the polymers in the first and second layers. This disclosure also describes methods of bonding together polymeric articles. The methods include diffusing polymerizable monomers and radical forming initiators into the surfaces of one or both of the polymers, putting the surfaces into contact, and initiating polymerization to create a polymer network that interpenetrates the polymers.

The present disclosure relates to a porous fluorine-based resin composite membrane having excellent water repellency and oil repellency, and a method for producing the same.

A gas barrier film including a polymer base, an undercoat layer that contains, as the main component, an acrylic resin having at least one side chain selected from the group consisting of the side chains (I) to (III) mentioned below, and an inorganic layer, wherein the undercoat layer and the inorganic layer are arranged in this order on at least one surface of the polymer base in such a manner that the undercoat layer and the inorganic layer are in contact with each other: (I) a side chain having an acrylic polymer skeleton; (II) a side chain having a dimethylsiloxane skeleton; and (III) a side chain having a skeleton containing a fluorine atom.

A sealing member includes: a rubber base material; and a coating provided on the rubber base material and having a melting point of 50 C. or higher, wherein the coating contains a polymer containing an acrylic acid ester containing a perfluoroalkyl group or a methacrylic acid ester containing a perfluoroalkyl group, as a monomer.

Provided is a method for producing a film, including a step A of applying a coating liquid containing a film-forming compound, a polymer, and a solvent onto a support to form a coating film, the polymer being at least one selected from a polymer having a fluoroaliphatic group or a polymer having a siloxane structure, and allowing a solution having the polymer dissolved in methyl ethyl ketone at a solid content of 55% by mass to have a viscosity of 15 mPa.Math.s or more at a liquid temperature of 60 C.; a step B of drying the coating film formed in the step A at a rate at which the coating film shows a mass change of from 0.02 g/m.sup.2/s to 0.1 g/m.sup.2/s for a time which is twice or more t seconds satisfying a predetermined condition A; and a step C of drying the coating film after the step B at a rate at which the coating film shows a mass change of from 0.02 g/m.sup.2/s to 0.2 g/m.sup.2/s.

A porous fluorine resin film in which a fibril structure is stabilized through impregnation coating of a water-repellent and oil-repellent polymer having a high oil repellency grade, and free shrinkage also proceeds before impregnation and application of the water-repellent and oil-repellent polymer, thereby improving dimensional stability, and a method for preparing the porous fluorine resin film.

According to the present invention, there are provided a film forming composition, which contains a polymer having a repeating unit represented by General Formula (I) and a curable compound, an optical film having a film formed of the composition, a hardcoat film, a polarizing plate, and a method for manufacturing a hydrophilized hardcoat film. In General Formula (I), R.sup.1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, L represents an ester bond, an ether bond, a phenylene group, or an amide bond, R.sup.2 and R.sup.4 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, or a halogenated alkyl group having 1 to 20 carbon atoms, and R.sup.3 represents a hydrogen atom or a substituent. ##STR00001##