Abstract: A hydrophilic coating material including an alginate compound having a bond with a silane compound is used. The material is produced by reacting a water-soluble alginate compound and a silane compound and then by adding a divalent metal ion to an alginic acid-derived carboxyl group in the reaction product.

Abstract: A method for manufacturing a microstructure comprising cured products of photosensitive resin compositions, the method comprising: a step of forming at least two layers of the photosensitive resin compositions each comprising a photopolymerization initiator; a step of subjecting each of the formed at least two layers of the photosensitive resin compositions to patterning exposure; and a step of collectively developing the exposed at least two layers of the photosensitive resin compositions to obtain a microstructure, wherein in the at least two layers of the photosensitive resin compositions, 90% by mass or more of the photopolymerization initiators contained in at least one of the two adjacent layers of the photosensitive resin compositions is a nonionic photopolymerization initiator.

Abstract: Provided is a photosensitive structural body including: a substrate having a hydroxy group on a first surface thereof; and a cured product of a negative photosensitive resin composition arranged on the substrate, wherein the negative photosensitive resin composition contains an epoxy compound (A), a photobase generator (B), and an aromatic compound (C), and the aromatic compound (C) is a compound represented by the following general formula (1): in the general formula (1), four of R1 to R6 each independently represent a hydrogen atom or an alkyl group, and remaining two thereof each independently represent a functional group selected from an unsubstituted amino group (—NH2), a hydroxy group (—OH), and a carboxyl group (—COOH), provided that the two functional groups each selected from an unsubstituted amino group, a hydroxy group, and a carboxyl group are functional groups different from each other.

Abstract: A method for producing a shaped object, the method comprising: laminating a photosensitive resin composition on an inorganic material layer of a substrate having the inorganic material layer on a surface thereof; performing a patterned exposure of the photosensitive resin composition using an i-line; and curing a pattern-exposed portion and removing an unexposed portion to form a shaped object in which a cured product of the photosensitive resin composition is formed on the substrate, wherein the photosensitive resin composition comprises an epoxy resin, at least one cationic polymerization initiator with a molar extinction coefficient in an i-line of less than 500 L·mol?1·cm?1 and at least one sensitizer with a molar extinction coefficient in an i-line of 500 L·mol?1·cm?1 or more.

Abstract: A liquid ejection head includes a substrate having a liquid feeding port and an energy generating element, a substrate protective layer provided on the substrate, and a nozzle forming member provided on the substrate protective layer, and having an ejection port ejecting a liquid, and a liquid flow channel communicating with the liquid feeding port and the ejection port. The substrate protective layer comprises an ion scavenger.

Abstract: A photosensitive resin composition comprising: (a) an epoxy resin, (b) a cationic polymerization initiator, (c) an anthracene derivative, and (d) an organic solvent having a carbonyl group, wherein the anthracene derivative (c) comprises at least one selected from the group consisting of compounds represented by a following formula (1) (In the formula (1), R1 and R2 each independently represents an alkyl group having 4 or more carbon atoms or an aryl group having 6 to 10 carbon atoms, R3 and R4 each independently represents an alkyl group, an alkoxy group having 4 or more carbon atoms, an amino group, an alkylamino group, an alkylsulfonyl group, or a halogen atom, and m and n each independently represents an integer of 0 to 4).

Abstract: A liquid discharge head including: a substrate having a liquid supply port; a flow channel forming member that is provided on the substrate and has discharge ports for discharging a liquid and a liquid flow channel that makes the liquid supply port and the discharge ports communicate with each other; and a support member that is provided on the substrate and arranged to be in contact with at least one surface of the flow channel forming member, with the one surface not being in contact with the liquid, wherein the flow channel forming member includes a cured product of a first photosensitive resin composition including a photosensitive resin, the support member includes a cured product of a second photosensitive resin composition including the epoxy resin A having a structure represented by formula (a1) or (a2) below in main chain structure: where, n1 and n2 represent integers of at least 2.

Abstract: A liquid discharge head comprising a substrate comprising a liquid feeding port and an energy generating element for liquid discharge, and a flow channel member comprising, on the substrate, a discharge port through which a liquid is discharged and a liquid flow channel communicating with both the liquid feeding port and the discharge port, wherein the flow channel member comprises a flow channel member (1) not comprising a surface in contact with the liquid and a flow channel member (2) comprising a surface in contact with the liquid, a film stress S1 and S2 of the flow channel members (1) and (2), respectively, satisfy S1<S2, a film thickness L1 and L2 of the flow channel member (1) and (2), respectively, in a direction perpendicular to the substrate, satisfy L1<L2, and satisfying 470 MPa·?m<[L1×S1+(L2?L1)×S2]<1200 MPa·?m.

Abstract: A method for producing a laminate of a cured material from a photosensitive resin composition (1) and a photosensitive resin composition (2), wherein the method includes a step of obtaining a laminated material by laminating the composition (2) onto the composition (1); a step of subjecting the laminated material to photoexposure to obtain a photocured material; a step of developing the photocured material to obtain a developed material; and a step of heating the developed material to obtain a laminate, wherein the photoexposure dose required to cure the composition (2) is smaller than the dose required to cure the composition (1), and wherein the composition (1) contains an epoxy resin (1) having a weight-average molecular weight Mw of 5,000 to 600,000, a softening point of at least 140° C., and an epoxy equivalent weight of not more than 2,300.

Abstract: A liquid discharge head is provided which has a substrate, a flow channel forming member provided on a substrate surface of the substrate and forming a flow channel of a liquid, and a discharge port forming member provided on the flow channel forming member and having a discharge port through which a liquid is discharged, wherein the discharge port forming member and the flow channel forming member are formed of materials different from each other, a thickness of the flow channel forming member is greater than a thickness of the discharge port forming member in a direction perpendicular to the substrate surface, the discharge port forming member is a cured product of a photosensitive resin composition, and the flow channel forming member contains at least one resin selected from the group consisting of a polyether amide resin, a polyether imide resin and a polyether amide-imide resin.

Abstract: A hydrophilic coating material including an alginic acid compound and a resin, in which the alginic acid compound is granulated and dispersed in the resin. In a coating film using the material, it is preferred that the granulated alginic acid compound is exposed on the surface. Such a hydrophilic coating film is suitable as a hydrophilization treatment film of a nozzle face surface of an inkjet recording head.

Abstract: A liquid discharge head including: a substrate having a liquid supply port; a flow channel forming member that is provided on the substrate and has discharge ports for discharging a liquid and a liquid flow channel that makes the liquid supply port and the discharge ports communicate with each other; and a support member that is provided on the substrate and arranged to be in contact with at least one surface of the flow channel forming member, with the one surface not being in contact with the liquid, wherein the flow channel forming member includes a cured product of a first photosensitive resin composition including a photosensitive resin, the support member includes a cured product of a second photosensitive resin composition including the epoxy resin A having a structure represented by formula (a1) or (a2) below in main chain structure: where, n1 and n2 represent integers of at least 2.

Abstract: A liquid discharge head comprising a substrate comprising a liquid feeding port and an energy generating element for liquid discharge, and a flow channel member comprising, on the substrate, a discharge port through which a liquid is discharged and a liquid flow channel communicating with both the liquid feeding port and the discharge port, wherein the flow channel member comprises a flow channel member (1) not comprising a surface in contact with the liquid and a flow channel member (2) comprising a surface in contact with the liquid, a film stress S1 and S2 of the flow channel members (1) and (2), respectively, satisfy S1<S2, a film thickness L1 and L2 of the flow channel member (1) and (2), respectively, in a direction perpendicular to the substrate, satisfy L1<L2, and satisfying 470 MPa·?m<[L1×S1+(L2?L1)×S2]<1200 MPa·?m.

Abstract: A photoresist composition is provided, which comprises a cationic polymerization resin, a resin A, a photoacid generator, and a solvent, wherein the resin A comprises at least one resin selected from the group consisting of polyester resins and polyether resins and is soluble in a ketone-based organic solvent.

Abstract: A liquid discharge head is provided which has a substrate, a flow channel forming member provided on a substrate surface of the substrate and forming a flow channel of a liquid, and a discharge port forming member provided on the flow channel forming member and having a discharge port through which a liquid is discharged, wherein the discharge port forming member and the flow channel forming member are formed of materials different from each other, a thickness of the flow channel forming member is greater than a thickness of the discharge port forming member in a direction perpendicular to the substrate surface, the discharge port forming member is a cured product of a photosensitive resin composition, and the flow channel forming member contains at least one resin selected from the group consisting of a polyether amide resin, a polyether imide resin and a polyether amide-imide resin.

Abstract: Provided is a method for manufacturing a liquid ejection head including an ejection orifice for ejecting a liquid, a substrate and a flow path forming member that is joined to the substrate to form a liquid flow path communicating with the ejection orifice, the method including: (1) forming a resin layer having a flow path mold pattern, on the substrate; (2) adding a hydrophilizing material represented by Chemical Formula 1 to an entire surface layer of the resin layer; (3) forming a covering resin layer serving as the flow path forming member, on the resin layer and forming a compatible layer containing the resin layer, the covering resin layer and the hydrophilizing material, at an interface between the resin layer and the covering resin layer; (4) forming the ejection orifice by exposing the covering resin layer; and (5) forming a flow path by removing the resin layer.

Abstract: A hydrophilic coating material including an alginate compound having a bond with a silane compound is used. The material is produced by reacting a water-soluble alginate compound and a silane compound and then by adding a divalent metal ion to an alginic acid-derived carboxyl group in the reaction product.

Abstract: A hydrophilic coating material including an alginic acid compound and a resin, in which the alginic acid compound is granulated and dispersed in the resin. In a coating film using the material, it is preferred that the granulated alginic acid compound is exposed on the surface. Such a hydrophilic coating film is suitable as a hydrophilization treatment film of a nozzle face surface of an inkjet recording head.

Abstract: Provided is a method of producing a microstructure including: forming a resin layer from a photosensitive resin composition on a substrate; exposing the resin layer to a microstructure pattern to form a cured portion as a result of the exposure and an uncured portion as a result of non-exposure; and removing the uncured portion from the substrate through development to provide a microstructure pattern having the cured portion, wherein the photosensitive resin composition to be used contains an epoxy resin, a crosslinking agent containing a polyhydric alcohol that is bifunctional or trifunctional with respect to a terminal hydroxy group, and that is free of a perfluoroalkyl group and a perfluoroalkylene group, a photoacid generator, and a solvent.

Abstract: A liquid ejection head includes an ejection opening member having an ejection opening through which a liquid is ejected. The ejection opening member is provided with a cured layer of a composition over the surface thereof. The composition contains (a) a condensate of a hydrolyzable silane compound having a fluorine-containing group and a hydrolyzable silane compound having a cationically polymerizable group, and (b) a compound having a cationically polymerizable group and an ethylene oxide chain.