| 摘要 |
<p>A liquid jet recording head comprising a cured product of an active energy-ray-curing resin composition as at least a part of its constitution, said composition comprises: (A) 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 which comprises a trunk chain composed mainly of structural units derived from at least one monomer selected from the group consisting of alkyl methacrylates, acrylonitrile and stylene and has graft chains having structural units derived from at least one monomer selected from the group consisting of the monomers represented by the following formula x and other monomers presented by the formula y: <CHEM> (wherein R<1> is hydrogen or an alkyl or hydroxyalkyl group having 1 to 3 carbon atoms, R<2> is hydrogen or an alkyl or acyl group having 1 to 4 carbon atoms which may have hydroxy group, R<3> is an alkyl group having 2 to 6 carbon atoms, a halogen-substituted alkyl group having 2 to 6 carbon atoms, an alkylether group represented by the formula: <CHEM> (wherein 2</=m+n</=6, n NOTEQUAL 0 and m NOTEQUAL 0), or a phenylalkyl group represented by the formula: <CHEM> (wherein 2</=m+n</=4, or the case where n=0 or m=0 is contained), added to said trunk chain; (B) a linear polymer having a number average molecular weight of 50,000 or more and a weight average molecular weight of 350,000 or less and having a glass transition temperature of 60 DEG C or more which comprises structural units derived from at least one monomer selected from the group consisting of methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, t-butyl methacrylate, benzyl methacrylate, acrylonitrile, isobornyl methacrylate, isobornyl acrylate, tricyclodecaneacrylate, tricyclodecane methacrylate, tricyclodecaneoxyethyl methacrylate, styrene, dimethylaminoethyl methacrylate and cyclohexyl methacrylate and other structural units derived from at least one monomer selected from the group consisting of the monomers represented by said formula (x) and the monomers represented by said formula (y); (C) an epoxy resin comprising at least one compound having one or more of epoxy groups in one molecule; and (D) a polymerization initiator capable of generating a Lewis acid by irradiation of an active energy-ray. <IMAGE></p> |
