Provided are a functional polymer membrane including: a surface layer; and an anion exchange membrane or a cation exchange membrane, in which the surface layer contains a polymer which includes a cross-linked structure having, in a cross-linking unit, an ionic group with a charge opposite to a charge of an ionic group included in at least one of the anion exchange membrane or the cation exchange membrane; a production method thereof, and a stack or a device provided with a polymer functional membrane.

Provided is a functional polymer membrane including a porous support; and a resin layer and an auxiliary layer which are supported by the porous support, in which both of the resin layer and the auxiliary layer contain an ion exchange polymer having one of an anion exchange group and a cation exchange group, a charge of the ion exchange group of the ion exchange polymer included in the resin layer is opposite to a charge of the ion exchange group of the ion exchange polymer included in the auxiliary layer, and both of the ion exchange polymers respectively included in the resin layer and the auxiliary layer are polymers having a unit obtained from an acryloyl group which may have an alkyl group at the -position; a stack or a device provided with a functional polymer membrane; and a method of producing, a functional polymer membrane.

The invention relates to a process for the production of mould-foamed poly(meth)acrylimide (P(M)I) cores, in particular of polymethacrylimide (PMI) cores, which can be used by way of example in automobile construction or aircraft construction. A feature of this process is that polymer granules or polymer powder preheated under pressure are moreover charged under pressure to a compression mould where they are foamed with depressurization. In particular, a feature of the process is that it optionally uses a preferably two-shell compression mould for the heating and also for the cooling of the granules and, respectively, the rigid foam core formed therefrom.

Embodiments of the invention provide a method for producing a multilayer coated film which involves obtaining a first layered body by forming, on a film substrate, a wet-coated film including a coating material (A) containing an active energy ray-curable resin which contains a first photopolymerization initiator and a second photopolymerization initiator, the reaction wavelengths of which differ from one another; and forming a pre-cured coated film including the coating material (A) in a dry-to-the-touch state by preliminarily curing the wet-coated film including the coating material (A), by irradiating the first layered body with active energy rays which include the reaction wavelength of the first photopolymerization initiator and do not include the reaction wavelength of the second photopolymerization initiator. The method further includes obtaining a second layered body by forming a wet-coated film including a coating material (B) on the pre-cured coated film including the coating material (A); and obtaining the multilayer coated film by fully curing the pre-cured coated film including the coating material (A) by irradiating the second layered body with active energy rays including the reaction wavelength of the second photopolymerization initiator.

A surface treatment liquid capable of making a surface of a treatment target hydrophilic or hydrophobic without including a resin having a coating film formation property, and a surface treatment method using the surface treatment liquid. The surface treatment liquid includes a resin, a solvent and a strong acid having a pKa of 1 or less. The resin includes a functional group I that is at least one of a hydroxyl group, a cyano group, and a carboxyl group, and a functional group II that is a hydrophilic group or a hydrophobic group other than the functional group I.

This invention aims to provide a thermally foamable microsphere which is excellent in heat resistance, has a high expansion ratio, and shows stable foaming behavior; a method of producing the thermally foamable microsphere; and suitable use thereof. This invention provides a thermally foamable microsphere in which an outer shell encapsulating a foaming agent is formed of a copolymer having a polymethacrylimide structure. In particular, this invention provides a thermally foamable microsphere in which monomers capable of forming the polymethacrylimide structure by a copolymerization reaction are methacrylonitrile and methacrylic acid. Moreover, this invention provides a method of producing the thermally foamable microsphere and use of the thermally foamable microsphere as an additive.

There is provided an optical film including an ultraviolet light absorbent having a first peak with a maximum absorption coefficient of 0.07 to 0.10 phr.sup.1m.sup.1 in a wavelength band of 290 to 320 nm and a second peak with a maximum absorption coefficient of 0.11 to 0.16 phr.sup.1m.sup.1 in a wavelength band of 330 to 400 nm, and acrylic resin, wherein the content of the ultraviolet light absorbent is 0.3 to 1.0 parts by weight with respect to 100 parts by weight of the acrylic resin, and a polarizing plate including the same.

A process for preparing an ion-exchange membrane having a textured surface profile comprising the steps (i) and (ii): (i) screen-printing a radiation-curable composition onto a membrane in a patterned manner; and (ii) irradiating and thereby curing the printed, radiation-curable composition; wherein the radiation-curable composition has a viscosity of at least 30 Pa.Math.s when measured at a shear rate of 0.1 s.sup.1 at 20 C.

A composition comprising: a) 5 to 65 wt % of curable compound comprising one ethylenically unsaturated group and at least one anionic group; b) 2.5 to 70 wt % of crosslinking agent comprising at least two acrylic groups; c) a tertiary amine; and d) 0 to 45 wt % of inert solvent; wherein the molar ratio of component c) to a) is at least 0.7. Also described are a process for making composite membranes and the resultant membranes.

Disclosed herein are an optical resin composition whose orientation birefringence and photoelastic birefringence are both very low and which has high transparency and which provides a film having few surface defects, high heat stability, high solvent resistance, and excellent surface appearance, and a film comprising the optical resin composition.

The optical resin composition comprises: a resin (A) having a maleimide unit represented by the formula (5) and a (meth)acrylic ester unit; and a glutarimide acrylic resin (B). The resin composition may further comprise multi-layered particles.

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