Abstract: A method for the production of a cross-linked support matrix that in form of a bed will permit liquid flow velocities above 5 cm/h, preferably above 50 cm/h, to pass through the bed. The method is characterized in that it comprises the steps: (a) providing a starting support matrix that has pendent unsaturated groups, and (b) subjecting said starting support matrix to electron beam or gamma-ray irradiation. The use of a cross-linked support matrix produced by a method comprising the steps of: (a) providing a starting support matrix that has pendent unsaturated groups, and (b) subjecting said starting support matrix to electron beam or gamma-ray irradiation as a support matrix in liquid chromatography, cell culturing, step-wise solid phase synthesis of organic compounds, running catalytic reactions by the use of a solid phase bound catalyst.

Abstract: An object of the present invention is to provide an excellent process for production of a surface-treated particulate water-absorbent resin wherein the process adopts a surface-treatment process that can enhance the properties (which the water-absorbent resin is desired to have) to extremely high levels, and also can solve the prior problems in such as safety, and further can sufficiently carry out the treatment even at a reaction temperature near room temperature. As a means of achieving this object, the process according to the present invention for production of a surface-treated particulate water-absorbent resin is characterized by comprising the steps of: adding a treating liquid to a particulate water-absorbent resin as a base polymer, wherein the treating liquid contains a radically polymerizable compound; and then irradiating the particulate water-absorbent resin with active energy rays while fluidizing the particulate water-absorbent resin, thereby surface-treating it.

Abstract: Disclosed are environmentally friendly, substantially all solids coating compositions which are curable using ultraviolet and visible radiation. In addition, the disclosed coating compositions are suitable for coating thermally sensitive objects and/or rusted surfaces. In addition, methods are disclosed for coating surfaces, or at least a portion of the surfaces, and curing of the coated surface to obtain partially or fully cured coated surfaces are also disclosed. Furthermore, articles of manufacture incorporating fully cured coated surfaces are disclosed, including, for example gas tanks such as, barbeque propane tanks. Also disclosed are methods, processes, production lines, articles of manufacture, and factories which incorporate these environmentally friendly, substantially all solids coating compositions curable using ultraviolet and visible radiation.

Abstract: A method of increasing the gas transmission rate of a packaging film comprises providing a packaging film that comprises at least about 0.001 weight % of single-walled carbon nanotube material based on the weight of the film. The packaging film is exposed to an amount of radiation energy effective to increase the oxygen transmission rate of the packaging film by at least about 100 cc (STP)/m2. day (1 atm, 0% RH, 23° C.).

Abstract: An oxygen scavenger composition includes an organic oxygen scavenger, a transition metal catalyst, and a blend of at least two photoinitiators selected from 1,3,5-tris(4-benzoylphenyl)benzene, thioxanthone derivative, acyl phenylphosphineoxide derivative, and diphenyl sulfide derivative. A film includes at least one layer including an organic oxygen scavenger, a transition metal catalyst, and a blend of at least two photoinitiators selected from 1,3,5-tris(4-benzoylphenyl)benzene, thioxanthone derivative, acyl phenylphosphineoxide derivative, and diphenyl sulfide derivative.

Abstract: Disclosed are environmentally friendly, substantially all solids coating compositions which are curable using ultra violet and visible radiation. In addition, methods for coating surfaces, or at least a portion of the surfaces, and curing of the coated surface to obtain partially or fully cured coated surfaces are also disclosed. Furthermore, articles of manufacture incorporating fully cured coated surfaces are disclosed, in particular motor vehicles and motor vehicle parts or accessories.

Abstract: An active energy ray curable ink-jet ink comprising an epoxy compound containing and alicyclic epoxy group and an epoxyfied fatty acid ester group, and a printed material used therewith.

Abstract: The present invention relates to a sinter powder composed of polyamide which also comprises PMMI, PMMA, or copolymers with PMMI, in particular PMMI-PMMA copolymers, to the use of this sinter powder for laser-sintering, and also to moldings produced from this sinter powder. The moldings made from the powder of the invention have marked advantages over conventional products in their appearance and in their surface quality, especially as far as roughness and dimensional stability during selective laser sintering (SLS) are concerned. In addition, moldings produced from the sinter powder of the invention also have better mechanical properties than moldings based on conventional nylon-12 powders, in particular in terms of modulus of elasticity and tensile strength. These moldings also have a density close to that of injection moldings.

Abstract: The present invention provides a one-bottle dental bonding composition that provides a bonding layer excellent in bonding strength, independent of the skill of the practitioners, and, more preferably, that releases fluoride ion gradually into oral cavity over an extended period of time. The one-bottle dental bonding composition comprises a radical polymerizable monomer (A) having an acidic group in the molecule, another radical polymerizable monomer (B), a photopolymerization initiator (C) and a water-soluble organic solvent (D), and is substantially free of water.

Abstract: Process for preparing crosslinked pressure ensitive adhesives, in which a plyacrylate is prepared by the free radical copolymericzation of a monomer mixture , the polyacrylate is then concentrated and the concentrated polyacrylate is reacted with further monomers having functional groups and subsequently crosslinking.

Abstract: To provide a radiation-sensitive curable liquid resin composition having excellent applicability and capable of producing a film excelling in hardness, scratch resistance, adhesion, transparency, and appearance of the surface of the film. A curable liquid resin composition comprising: (A) particles prepared by bonding at least one oxide of an element selected from the group consisting of silicon, aluminum, zirconium, titanium, zinc, germanium, indium, tin, antimony, and cerium to a specific organic compound which comprises a polymerizable unsaturated group and a group shown by —X—C(?Y)—NH— (wherein X is NH, O, or S, and Y is O or S), and preferably a silanol group, (B) a compound having two or more polymerizable unsaturated groups in the molecule, (C) a specific alkylene glycol organic solvent, and preferably (D) a polymerization initiator.

Abstract: The invention relates to primer coating compositions exhibiting very good adhesion properties on a large variety of substrates, in particular plastic substrates such as ophthalmic lenses made of organic glasses and which also impart good impact resistance properties to the thus coated substrates. The invention also concerns substrates coated with these primer coating compositions as well as a method for making such coated substrates.

Abstract: The invention relates to a curable resin composition, cured products thereof, and laminated materials. The curable composition comprises: (A-1) acicular oxide particles, the oxide being an oxide of at least one element selected from the group consisting of silicon, aluminum, zirconium, titanium, zinc, germanium, indium, tin, antimony, and cerium, (B) a compound having two or more polymerizable unsaturated groups, (C) a photopolymerization initiator is provided. After cure, the composition has excellent scratch resistance. In addition, it may have excellent antistatic characteristics and transparency. In a preferred embodiment the composition also comprises (A-2) particles other than the acicular particles (A-1), being oxide of at least one element selected from the group consisting of silicon, aluminum, zirconium, titanium, zinc, germanium, indium, tin, antimony, and cerium.

Abstract: Ultraviolet (UV)-curable polyurethane compositions are provided which are made by reacting an isocyanate with an ultraviolet (UV)-curable polyol that is made by co-polymerizing an alkylene oxide, an unsaturated carboxylic acid or anhydride and a hydroxy functional compound and which has an ultra-low level of unsaturation. The inventive ultraviolet (UV)-curable polyurethane compositions may find use in or as coatings, adhesives, sealants, elastomers and the like.

Abstract: To provide an aqueous emulsion composition which has high adhesion strength for a wide variety of materials including molded products and affords sufficient wettability even for the object to be adhesive bonded of low surface polarity so that it can develop sufficient adhesiveness and whose emulsion is stable so satisfactorily as to provide good mechanical stability and storage stability, and to provide an adherent composition comprising the aqueous emulsion composition, at least ethylene-vinyl acetate copolymer or modified resin thereof, photo polymerization initiator, and unsaturated ethylenic monomer are mixed and dissolved or dispersed, to prepare oil drop component, followed by emulsifying the oil drop component in water by using a surface-active agent, whereby an aqueous emulsion composition, in which micelles each encapsulating at least the ethylene-vinyl acetate copolymer or modified resin thereof, the photo polymerization initiator and unsaturated ethylenic monomer are dispersed in water, is prepared

Abstract: A photosensitive composition for forming a dielectric of the present invention comprising inorganic particles, an alkali developable resin and additives, wherein the additives comprise a compound having a quinonediazido group (C1), a compound containing at least two alkyletherified amino groups in the molecule (C2) and a thermal acid generator (C3), or wherein the inorganic particles comprise inorganic superfine particles (A-I) having a mean particle diameter of less than 0.05 ?m and inorganic fine particles (A-II) having a mean particle diameter of not less than 0.05 ?m. The composition can be calcined at low temperatures to form a dielectric layer with high dimensional precision, said layer having a high dielectric constant and a low dielectric loss. Also provided are a dielectric and an electronic part prepared from the composition.

Abstract: A process for the production of coatings with scratch-resistant durable surfaces that comprise as photoinitiator (B) in a photocurable formulation at least one surface-active photoinitiator, concentrated at the surface of the formulation, of formula (Ia) or (Ib), wherein Ra is a radical of formula (IIa), Rb is a radical of formula (IIb)), or Ra and Rb are naphthyl, anthracyl, phenanthryl or a heterocyclic radical each of which is unsubstituted or substituted; R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10 are, for example, each independently of the others hydrogen; A-Y; C1–C12alkyl, halogen or phenyl; R11 and R12 are, for example, C1–C12 alkyl; X is —OR20 or —N(R21)(R22); R20 is, for example, hydrogen or C1–C4alkyl; R21 and R22 are, for example, hydrogen or C1–C12 alkyl; X1 is, for example, —O—; Y is, for example, a single bond or —O—; Y1 is, for example, a single bond; and A is, for example, C6–C30alkyl.

Abstract: A photocurable composition which can be produced and cured while utilizing two different polymerization modes, can be used for bonding over a sufficiently long time period, and has excellent peel strength. The composition comprises (A) a compound containing a polymerizable unsaturated bond and giving a homopolymer having a glass transition temperature of 0 to 100° C., (B) a compound which has an unsaturated bond and is copolymerizable with the compound (A), (C) a compound having at least one cationically polymerizable group per molecule, (D) a polymerization catalyst which upon irradiation with light initiates the polymerization of the compounds (A) and (B), and (E) a cationic polymerization catalyst which upon irradiation with light initiates the cationic polymerization of the compound (C) at the cationically polymerizable group(s).

Abstract: A photoimageable composition comprising finely divided particles of inorganic material comprising coated silver particles that are at least partially coated with at least one surfactant and inorganic binder dispersed in organic medium comprising an aqueous developable polymer, photo-initiation system and organic solvent.

Abstract: Provided are radiation-cured, laminated materials, radiation-curable adhesive compositions suitable for use in forming the laminated materials, and methods of making laminated materials.

Abstract: A coating composition comprising (1) an anionic surfactant comprising a sulfonic acid salt, (2) a sol of fine inorganic oxide particles, (3) a silicon compound having one acryl or methacryl group and a hydrolyzable group or a product of hydrolysis of the compound, (4) a compound having at least two photopolymerizable unsaturated groups, and (5) a photopolymerization initiator; and a coated article obtained by applying the coating composition to a base and then photocuring the coating. The coated article combines antifogging properties with abrasion resistance sufficient for practical use.

Abstract: A high refractive index, curable, synthetic resin composition comprising a core resin composition composed of a mixture of ethylenically unsaturated compounds, and an initiation system containing both photo and thermal initiators, particularly a photochromic resin composition which further includes at least one photochromic dye. Also a curing process, which includes a combination of multi-step radiation curing and thermal annealing. Articles produced of cured composition exhibit superior physical and, in appropriate cases, photochromic properties and can be easily mass produced on a commercial scale due to short processing time and use of readily available chemicals.

Abstract: A resin composition of the present invention is obtainable by adding a photo-polymerization initiator (d) to a resin solution (a) containing a modified product of a thermoplastic resin (A). The modified product is prepared by conducting radical polymerization of the thermoplastic resin (A) with a (co)polymer (B) of a copolymerizable monomer (C) comprising a monomer having an ?,?-mono-ethynically unsaturated group, or the monomer and other copolymerizable monomers in a weight ratio (A)1(B) of 1/9 to 9/1, in an organic solvent, or by conducting polymerization of a copolymerizable monomer (C) comprising a monomer having an ?,?-mono-ethylenically unsaturated group, or the monomer and other copolymerizable monomers in a weight ratio (A)/(C) of 1/9 to 9/1, in an organic solvent in the presence of the thermoplastic resin (A), and then conducting radical polymerization thereof. A paint including the resin composition and a process for forming a coating film are also disclosed.

Abstract: The present invention provides radiation curable resin compositions that contain no or essentially no volatile organic components (VOCs), and to methods of using these compositions. The radiation curable resin compositions find particular use as coating compositions. In particular, the radiation curable resin compositions of this invention comprise a vinyl dioxolane end-capped oligomer blended with a photoinitiator.

Abstract: A latent material having various controlled shrinkage tensions and patterns and a method of making the same. The materials include polymer materials that are capable of absorbing microwave energy. Different degrees of shrinkage of the material may be controlled to create different tensions in the material. Additionally, various stereo and three-dimensional patterns may be generated on the material. These materials may be used in the formation of personal care articles. The materials are made by incorporating a polymer material onto the film, wherein the polymer material is capable of turning microwave energy into heat. Upon exposure to microwave radiation, the heat will cause the latent material to shrink. The use of different types and amounts of polymer materials will result in a latent material having different tensions and patterns.

Abstract: A process for preparing hot-melt pressure-sensitive adhesives from aqueous dispersions based on polyacrylate, and pressure-sensitively adhesive articles produced therefrom, which comprises producing highly concentrated aqueous dispersions with polymer contents between 68% by weight and 87% by weight of gel-free, molecularly-dispersely meltable polymer particles with an at least bimodal size distribution in size ranges between 0.5 ?m and 1000 ?m Ø.

Abstract: The present invention provides a novel photosensitive compound having an azido group suitable for exposure to light of a short wavelength; a photosensitive resin containing the photosensitive compound; and a photosensitive composition containing the photosensitive compound or photosensitive resin. The photosensitive compound containing a photosensitive unit represented by formula (1): wherein R is selected from among the following groups, R: X is selected from among the following groups, X: and each of Y and Z represents a hydrogen atom, an alkyl group, an acetal-group-containing alkyl group, an aryl group, an aralkyl group, or a substituent containing a base-forming nitrogen atom, wherein at least one of R and X contains an azido group.

Abstract: There is disclosed a method of easily producing a long-lived ion sensitive film having excellent durability and used in an ion sensor. The method starts with preparing a monomer mixture consisting chiefly of monomer units including a functional group and a second group of bonded atoms. The functional group has a function of identifying a certain chemical substance. The second group can become an active species that induces a polymerization or bridging reaction by being irradiated with an electron beam or radiation. Then, the monomer mixture is irradiated with the electron beam or radiation in a low energy range. Thus, the monomer mixture is polymerized.

Abstract: The invention relates to cross-linked acrylic microparticles, a method for the production thereof by polymerization in a dispersion in a non aqueous medium and to the uses thereof in covering or moulding compositions involving a favourable compromise between hardness, flexibility and adhesion. The micropparticles are obtained from a composition comprising: 50-99% mols of a constitutent (A) consisting of Cardura E 10 (meth)acrylate and optionally alkyl (meth)acrylate in C2-C8; a compound (B) consisting of at least one monomer or oligomer having at least 2 ethylenic unsaturations; a compound (C) consisting of at least one monomer or oligomer having in addition to one ethylenic unsaturation at least one second function (F1) with the possibility of at least partial chemical modification of the initial functions f1 into final functions f2.

Abstract: This present invention discloses a photopolymerisable mixture comprising a polymer binder, a radically photopolymerisable component containing at least one photooxidisable group, a polyethylene glycol di(meth)acrylate containing 2 or more ethylene glycol units, a photoreducible dye and a metallocene. This mixture can be used for preparing high-speed light-sensitive recording materials showing a particularly high resolution, especially for small negative types.

Abstract: This invention relates to a radiation-resistant acrylic adhesive composition with less reduction in the adhesion thereof upon irradiation with radiations, which composition comprises an acrylic polymer and a radiation-resistant agent, and a radiation-resistant adhesive product comprising the composition.

Abstract: A method of modifying a polymeric material which comprises the steps of activation-treatment and a hydrophilic polymer-treatment, or comprises the steps of activation-treatment, a hydrophilic polymer-treatment, and monomer grafting in this order, or comprises the step of a solvent-treatment followed by these steps. Thus, the polymeric material, e.g., polyolefin, is improved in hydrophilicity, adhesion, etc. without lowering the practical strength thereof. The polymeric material thus improved in adhesion and other properties can be used in many applications where water absorption and adhesion are required, such as an absorption material, e.g., a wiping/cleansing material, a water retention material, a material for microorganism culture media, a separator for batteries (or cells), a synthetic paper, a filter medium, a textile product for clothing, a medical/sanitary/cosmetic supply, and reinforcing fibers for composite materials.

Abstract: A process for crosslinking polyacrylate compositions, wherein, by selective irradiation of the pressure-sensitive adhesive composition with electron beams, the polymer is cured only in certain structures and, as a result, structured pressure-sensitive adhesive compositions can be prepared.

Abstract: Provided are an active energy ray-curable urethane (meth)acrylate and an active energy ray-curable composition for paints and coating agents having abrasion resistance and lubricity, and uses thereof. The curable urethane (meth)acrylate has a long chain alkyl group having 13 to 25 carbon atoms and an active energy ray-curable functional group and is modified with polycaprolactone. The urethane (meth)acrylate is obtainable by reacting an organic isocyanate having three or more isocyanate groups in one molecule, a long chain alkyl alcohol, and a polycaprolactone-modified hydroxyethyl (meth)acrylate. On the other hand, the active energy ray-curable composition contains the urethane (meth)acrylate.

Abstract: The object of the invention is to provide a rubber composition or its crosslinked product used for a rubber stopper for a medicament or a rubber article for a medical treatment, suitable for radiation treatments to be carried out for the purpose of sterilizing. Accordingly, the present invention provides a rubber composition or its crosslinked product used for a rubber stopper for a medicament or a rubber article for a medical treatment, comprising an isobutylene copolymer, as a predominant component, with a density of at most 0.95, capable of being readily subjected to a radiation treatment.

Abstract: The invention is concerned with the problem that with known plastic casting moulds, especially those of polypropylene, the lenses produced with these moulds have a slippery surface. The invention solves this problem through the use of polymers which are notable for their very low oxygen permeability.

Abstract: A process for manufacture of a photochromic polymeric article comprising: providing a fluid polymerisable composition; subjecting the fluid polymerisable composition to a first curing step to provide a solid article of intermediate hardness; contacting the solid article of intermediate hardness with a photochromic substance; and subjecting the solid article of intermediate hardness to a further curing step to increase the hardness and provide a polymeric article imbibed with the photochromic substance.

Abstract: A dental adhesive composition for bonding dental restoratives to dentin and enamel provides a one-part self-etching, self-priming dental adhesive composition having hydrolysis stable polymerizable acidic adhesive monomers.

Abstract: A radiation-curable composition is comprised of the reaction product of an amine-terminated (poly)aminoamide and a mono-(meth)acrylate or a poly-(meth)acrylate. The radiation-curable composition is a liquid at room temperature and does not undergo substantial volume contraction upon curing and exhibit excellent adhesion to porous and non porous substrates alike.

Abstract: An ultraviolet crosslinking pressure-sensitive adhesive composition showing good pressure-sensitive adhesive characteristics is obtained by using a block copolymer of styrenic polymer component and acrylic polymer component. The pressure-sensitive adhesive composition is produced by conducting living radical polymerization of styrenic monomer and acrylic monomer in a proper order in the presence of a transition metal and its ligand using a polymerization initiator to obtain a block copolymer (a) wherein at least one styrenic polymer block A and at least one acrylic polymer block B are bound to each other and mixing it with a trichloromethyl group-containing triazine derivative (b) or, alternatively, to obtain a block copolymer (a) which contains carboxy precursor groups in the acrylic polymer block B, and converting the precursor groups to carboxyl groups, before or after mixing with the component (b), by heat-treating in the presence of an acid catalyst.

Abstract: Aqueous storage-stable, non-sedimenting photoinitiator suspensions comprising (a) a mono- or bis-acylphosphine oxide of formula (I), wherein R1 is C1-C20alkyl; C2-C20alkyl interrupted by one or more O atoms; C1-C12alkoxy; phenyl-C1-C4alkyl; or phenyl that is unsubstituted or substituted by C1C20alkyl, C1-C12alkoxy, halogen, cyclopentyl, cyclohexyl, C2-C12alkenyl, C2-C18alkyl interrupted by one or more O atoms, and/or by phenyl-C1-C4alkyl; or R1 is biphenylyl; R2 is an aromatic radical or has one of the meanings give for R1; R3 and R4 are each independently of the other C1-C12alkyl, C1-C12alkoxy or halogen; and R5 is hydrogen, C1-C12alkyl, C1-C12alkoxy or halogen; (b) a dispersant; and (c) water are suitable especially in the photopolymerisation of aqueous formulations comprising ethylenically unsaturated monomers.

Abstract: The present invention discloses methods for enhancing the wear-resistance of polymers, the resulting polymers, and in vivo implants made from such polymers. One aspect of this invention presents a method whereby a polymer is irradiated, preferably with gamma radiation, then thermally treated, such as by remelting of annealing. The resulting polymeric composition preferably has its most oxidized surface layer removed. Another aspect of the invention presents a general method for optimizing the wear resistance and desirable physical and/or chemical properties of a polymer by crosslinking and thermally treating it. The resulting polymeric compositions is wear-resistant and may be fabricated into an in vivo implant.

Abstract: An intaglio printing ink comprising a first binder compound selected from the group of water-soluble or water-thinnable acrylate oligomers, and optionally, a second monomeric binder compound selected from the group comprising water-soluble or water-thinnable PEG diacrylate or polyethoxylated polyol triacrylate monomers to adjust the viscosity of the ink composition. To initiate polymerization of the binder compounds upon irradiation by electromagnetic radiation or electron beam radiation a photoinitiator is included. Further optional additives, such as pigments, fillers, photosensitizers, stabilizers emulsifiers and security pigments may be present. The ink shows excellent wipeability and allows precipitation from the wiping solution.

Abstract: A process for producing scratch-resistant coatings, encompassing the following steps: applying at least one UV-curable coating composition to at least one surface of an article to be coated, said coating composition comprising at least one polymer and/or oligomer P1 containing on average at least one ethylenically unsaturated double bond per molecule, and curing the coating composition by exposure to UV radiation, which comprises conducting the curing of the coating composition under an oxygen-containing protective gas which has an oxygen partial pressure in the range from 0.2 to 18 kPa.

Abstract: A photoimageable composition comprising finely divided particles of inorganic materials comprising functional phase particles selective from electrically conductive, resistive and dielectric particles; and inorganic binder dispersed in organic medium comprising an aqueous developable polymer; photoinitiation system; and a photospeed enhancer wherein the enhancer comprises a ratio of 30/70 to 70/30 mixture selected from stearic acid and palmitic acid; salt of stearate and salt of palmitate; stearic acid and salt of palmitate; salt of stearate and palmitic acid; and organic solvent.

Abstract: This invention provides a high-solids coating composition which comprises (A) a compound which has at least one radically polymerizable unsaturated group per molecule, (B) a hydroxyl group-containing ester compound which is obtained by ester-forming addition reaction between 2,2-dimethylolalkanoic acid having 6 to 8 carbon atoms and alkanoic acid monoglycidylester, and which has an acid value of 20 mgKOH/g or less, (C) a curing agent which is reactive with the above-mentioned hydroxyl group-containing ester compound (B), and (D) a photopolymerization initiator, and also provides a process to form a coating film by spray coating of said coating composition, which process is characterized by irradiating flying paint particles which have been sprayed and/or paint which has been applied onto a substrate with active energy ray so as to make the coating composition partially react, and by subsequently heating the coating composition.

Abstract: Dental bonding compositions and methods for promoting adhesion of an amalgam-based restorative material to a dental substrate. The inventive compositions include one or more polymerizable resins that are able to adhere to a dental substrate when at least partially polymerized, one or more polymerization photoinitiators in an amount so as to result in partial polymerization of the resin when the compositions are irradiated with radiant energy, and one or more chemical initiators (e.g., benzoyl peroxide) that cause further polymerization of the resin when the composition is contacted with an amalgam restorative. A bonding composition applied to a dental substrate and irradiated with radiant energy is more polymerized in a region adjacent to the dental substrate, while a less polymerized inhibition layer forms in the region of the surface. Packing an uncured amalgam into the dental preparation mechanically disrupts the inhibition layer so as to form peaks, troughs and other irregularities.

Abstract: The invention relates to a mixture, containing A) a polymer, which consists to an extent of at least 40 wt % of C1-C18 alkyl (meth)acrylates (referred to herein as polyacrylates) and B) a homopolymer or copolymer of vinyl alkyl ether (referred to herein as polyvinyl alkyl ether), which consists, to an extent of at least 70 wt %, of structural units of the following formula, in which X stands for a single bond or a C1-C3 alkyl group and R for a C1-C6 alkyl group.

Abstract: Membranes made from amphiphilic copolymers are disclosed. The amphiphilic copolymers can be ABA copolymers, where one of A and B is hydrophilic and the other is hydrophobic. The copolymers may be crosslinked to form more stable structures. Crosslinking can be accomplished using a variety of methods, including end to end polymerization of copolymers having terminal unsaturated groups. Molecules such as membrane proteins can be incorporated into the membrane to allow the transport there through of selected components.

Abstract: The present invention provides: a water-absorbent resin powder, which includes no fine metallic foreign substance, and in which the deterioration is suppressed; its production process; and uses. The present invention production process for a water-absorbent resin powder comprises the steps of: polymerizing an unsaturated monomer; and drying the resultant crosslinked hydrogel polymer, wherein the water-absorbent resin powder has a crosslinked structure and a mass-average particle diameter of 300 to 600 &mgr;m wherein the ratio of fine particles having particle diameters of not larger than 150 &mgr;m is less than 10 mass % of the water-absorbent resin powder, with the production process being characterized by further comprising a magnetic-flux irradiation step of passing a magnetic field having a magnetic flux density of not less than 0.05 Wb/m2 through the water-absorbent resin powder after the drying step in the production process.