Abstract: An improved active energy ray-curing resin composition comprising (i) a graft copolymerized polymer having a number average molecular weight of 5,000 or more and a weight average molecular weight of 50,000 or less: (ii) a linear polymer having a number average molecular weight of 5,000 or more and a weight average molecular weight of 350,000 or less and having a glass transition temperature of 60.degree. C. or more: (iii) a half-esterificated epoxy resin: and (iv) a polymerization initiator capable of generating a Lewis acid by irradiation of an active energy ray. The resin composition can be desirably cured with an active energy ray such as ultraviolet ray or electron beam and it is capable of being laminated in a desired pattern on a copper-coated laminate for use as a printed board or on a plate of metal, glass, ceramics or plastic.

Abstract: An improved active energy ray-curing resin composition comprising (i) a graft copolymerized polymer having a number average molecular weight of 5,000 or more and a weight average molecular weight of 50,000 or less: (ii) a linear polymer having a number average molecular weight of 5,000 or more and a weight average molecular weight of 350,000 or less and having a glass transition temperature of 60.degree. C. or more: (iii) an epoxy resin containing at least one compound having one or more epoxy groups in one molecule, (iv) a monomer having an ethylenically unsaturated bond and (v) a polymerization initiator capable of generating a Lewis acid by irradiation of an active energy ray. The resin composition can be desirably cured with an active energy ray such as ultraviolet ray or electron beam and it is capable of being laminated in a desired pattern on a copper-coated laminate for use as a printed board or on a plate of metal, glass, ceramics or plastic.

Abstract: An active energy ray-curing resin composition comprises (i) a heat-crosslinkable linear copolymer comprising 5 to 30 mol % of a monomer represented by the general formula I shown below and 5 to 50 mol % of a monomer represented by the general formula II shown below as the copolymer constituents: ##STR1## (wherein R.sup.1 is hydrogen or alkyl or hydroxyalkyl group having 1 to 3 carbon atoms; R.sup.2 is hydrogen or alkyl or acyl group having 1 to 4 carbon atoms which may have a hydroxyl group; R.sup.3 is hydrogen or alkyl group having 1 to 3 carbon atoms; R.sup.4 is a divalent hydrocarbon group which may have internally an ether bond and may also be substituted with halogen atoms; and R.sup.5 is alkyl having 3 to 12 carbon atoms or phenylalkyl group or phenyl group), and (ii) a monomer having an ethylenically unsaturated bond.

Abstract: A head for ink jet recording and an ink jet recording apparatus equipped with this head, wherein the head has an end face that includes an ink eject opening having a thin layer of a polymer derivative compound of 1,3- or 1,4-bis(hexafluoroisopropyl)benzene, or 2,2-disphenylhexafluoropropane represented by the formula (I or II): ##STR1## wherein X represents ##STR2## Y represents hydrogen atom or methyl group, m and n represent 0 or 1, and when m is 0, n is also 0.

Abstract: A method of manufacturing a liquid jet recording head using first and second substrates in which at least one of said substrates can transmit an active energy beam, said method comprising the steps of:(1) laminating a solid layer onto at least a liquid channel forming portion on the first substrate;(2) forming a laminate which is constituted by sequentially laminating said first substrate, an active energy beam hardening material layer which covers said solid layer, and the second substrate;(3) laminating a mask adapted to shield said liquid chamber forming portion against the active energy beam onto said active energy beam transmitting substrate of said laminate and thereafter, irradiating the active energy beam from above the mask, and thereby hardening the active energy beam hardening material layer in said irradiated portion; and(4) removing the solid layer and the active energy beam hardening material layer in the unhardened state.

Abstract: An ink jet recording head having an ink pathway in communication with a jetting exit formed on a substance on which an active element generating energy utilized for jetting out an ink is disposed, at least a portion of the ink pathway being constituted with a cured film of photosensitive resin, wherein the photosensitive resin composition includes (a) a specific high molecular compound, (b) a photopolymerizable compound having two or more acryloyl groups or methacryloyl groups in one molecule, and (c) a photopolymerization initiator. The ink jet recording head has various advantages, for example, (i) having satisfactory durability against a change in temperature during working conditions, (ii) causing no defoliation between the ink pathway walls and other constituent members even under continuous long-term use, (iii) developing no crack in the ink pathway walls even for continuous long-term use, and (iv) having satisfactory jetting durability.

Abstract: A liquid jet recording head, having a liquid pathway communicated to the discharging outlet of the liquid provided on a substrate surface, said pathway being formed by subjecting a layer of a resin composition curable with an active energy ray to a predetermined pattern exposure with the use of said active energy ray to thereby form a cured region of said resin composition and removing the uncured region from said layer, said resin composition being an active energy ray curable resin composition comprises,(A) a graft copolymerized polymer comprising trunk chains composed mainly of structural units comprising a monomer comprising in the molecule one (meth)acryloyl group and a dicyclopentenyl derivative group represented by the general formula (I) shown below: ##STR1## (wherein Z represents a 5-membered ring represented by ##STR2## R.sub.1 and R.sub.

Abstract: An active energy ray-curable resin composition comprises (A) a graft copolymerized polymer comprising graft chains composed mainly of structural units derived from at least one monomer selected from the group consisting of (a) hydroxyl containing (meth)acrylic monomers, (b) amino or alkylamino containing (meth)acrylic monomers, (c) carboxyl containing (meth)acrylic or vinyl monomers, (d) N-vinylpyrrolidone, (e) vinylpyridine or its derivatives and (f) (meth)acrylic amide derivatives represented by the general formula (II) shown below: ##STR1## (wherein R.sub.1 is hydrogen or methyl group and R.sub.2 is hydrogen or an alkyl or acyl group having 1 to 4 carbon atoms which may have hydroxyl group added to trunk chains composed mainly of structural units compsiting at least one monomer selected from the group consisting of the monomer represented by the general formula (I) shown below: ##STR2## (wherein R.sub.1 to R.sub.

Abstract: A liquid jet recording head, having a liquid pathway communicated to the discharging outlet of the liquid provided on a substrate surface, said pathway being formed by subjecting a layer of a resin composition curable with an active energy ray to a predetermined pattern exposure with the use of said active energy ray to thereby form a cured region of said resin composition and removing the uncured region from said layer, said resin composition being an active energy ray curable resin composition comprising;(A) a graft copolymerized polymer comprises; trunk chains composed mainly of structural units as monomer represented by the general formula (I) shown below: ##STR1## (wherein R.sub.1 to R.sub.

Abstract: An active energy beam-curable type resin composition, which comprises (A) a graft copolymer comprising a main chain composed mainly of structural units of monomers containing one (meth)acryloyl group and a dicyclopentenyl derivative group represented by the following general formula (I): ##STR1## wherein Z represents a five-membered ring given by ##STR2## and R.sub.1 and R.sub.

Abstract: A liquid jet recording head is produced by (a) forming a solid layer comprising a photoresist of a positive type photosensitive material on a substrate in accordance with the pattern of the liquid flow path, (b) filling up the recess on the substrate where the solid layer is not present, with a liquid flow path wall forming material, and (c) removing the solid layer from the substrate.

Abstract: A light jet recording head has a liquid passage communicated to the discharging outlet of the liquid provided on a substrate surface, said passage being formed by subjecting a layer of a resin composition curable with an active energy ray to a predetermined pattern exposure with the use of said active energy ray to thereby form a cured region of said resin composition and removing the uncured region from said layer, said resin composition comprising:(i) a linear polymer having a glass transition temperature of 50.degree. C. or higher and a weight-average molecular weight of about 3.0.times.10.sup.4 or more; and(ii) an epoxy resin comprising at least one compound having two or more epoxy groups in the molecule, the epoxy groups existing in said epoxy resin being partially esterified with an unsaturated carboxylic acid.

Abstract: A liquid jet recording head has a liquid passage communicated to the discharging outlet of the liquid which is formed with a resin composition cured with an active energy ray. The resin composition to be cured comprises (i) a heat-crosslinkable linear copolymer containing 5-30 mol % of a monomer of formula I and 5-50 mol % of a monomer of formula II ##STR1## and (ii) a monomer having an ethylenically unsaturated bond.

Abstract: A liquid jet recording head, having a liquid passage communicated to the discharging outlet of the liquid provided on a substrate surface, said passage being formed by subjecting a layer of a resin composition curable with an active energy ray to a predetermined pattern exposure with the use of said active energy ray to thereby form a cured region of said resin composition and removing the uncured region from said layer, said resin composition comprising (i) a graft copolymerized polymer, (iii) an epoxy resin comprising at least one compound having one or more epoxy groups in the molecule and (iv) a polymerization initiator capable of generating a Lewis acid by irradiation of an active energy ray.

Abstract: A liquid jet recording head having a liquid passage communicated to a liquid discharging outlet provided on a substrate surface is obtained, said passage being formed by subjecting a layer of a resin composition curable with an active energy ray to a predetermined pattern exposure with the use of said active energy ray to thereby form a cured region of said resin composition and removing the uncured region from said layer, said resin composition comprising:(i) a linear polymer having a glass transition temperature of 50.degree. C. or higher and a weight average molecular weight of about 3.0.times.10.sup.4 or higher;(ii) a monomer having an ethylenically unsaturated bond;(iii) an epoxy resin comprising at least one compound having one or more epoxy groups in the molecule; and(iv) a polymerization initiator capable of generating a Lewis acid by irradiation with an active energy ray.

Abstract: A liquid jet recording head has a liquid passage communicated to the discharging outlet of the liquid provided on a substrate surface, said passage being formed by subjecting a layer of a resin composition curable with an active energy ray to a predetermined pattern exposure with the use of said active energy ray to thereby form a cured region of said resin composition and removing the uncured region from said layer, said resin composition comprising the component (i) shown below and at least one of the components (ii) and (iii) shown below:(i) a graft copolymerized polymer comprising a trunk chain composed mainly of structural units derived from at least one monomer selected from the group consisting of alkyl methacrylate, acrylonitrile and styrene, having graft chains composed mainly of structural units derived from at least one monomer selected from the group consisting of (A) hydroxyl containing acrylic monomers, (B) amino or alkylamino containing acrylic monomers, (C) carboxylic containing acrylic or vin

Abstract: A liquid jet recording head is produced by (a) forming a solid layer comprising a photoresist of a positive type photosensitive material on a substrate in accordance with the pattern of the liquid flow path, (b) filling up the recess on the substrate where the solid layer is not present, with a liquid flow path wall forming material, and (c) removing the solid layer from the substrate.