申请人:CANON KABUSHIKI KAISHA
公开号:EP0447591A1
公开(公告)日:1991-09-25
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:
(wherein R¹ is hydrogen or an alkyl or hydroxyalkyl group having 1 to 3 carbon atoms, R² is hydrogen or an alkyl or acyl group having 1 to 4 carbon atoms which may have hydroxy group, R³ 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:
(wherein 2≦m+n≦6, n≠0 and m≠0), or a phenylalkyl group represented by the formula:
(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°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.
一种液体喷射记录头,包括至少部分构成为活性能量射线固化
树脂组合物的固化产物,所述组合物包括
(A) 一种接枝共聚聚合物,其数均分子量大于或等于 5000,而重量平均分子量小于或等于 50000,该聚合物由一条主链组成,主链主要由至少一种单体的结构单元组成,这些单体选 自
甲基丙烯酸烷基酯、
丙烯腈和
苯乙烯组成的组,接枝链具有至少一种单体的结构单元,这 些单体选自下式 x 所表示的单体和由式 y 所表示的其他单体组成的组:
(其中 R¹ 为氢或具有 1 至 3 个碳原子的烷基或羟基烷基,R² 为氢或具有 1 至 4 个碳原子的烷基或酰基(可带有羟基),R³ 为具有 2 至 6 个碳原子的烷基、具有 2 至 6 个碳原子的卤代烷基、由式 y 代表的烷基醚基团:
(其中 2≦m+n≦6,n≠0 且 m≠0),或由式表示的苯基烷基:
(其中 2≦m+n≦4,或包含 n=0 或 m=0 的情况),加到所述主链上;
丙烯腈、甲基
丙烯酸异冰片酯、
丙烯酸异冰片酯、
丙烯酸三
环癸烷酯、
甲基丙烯酸三
环癸烷酯、
甲基丙烯酸三
环癸烷氧
乙酯、
苯乙烯、甲基
丙烯酸二甲胺基乙酯和
甲基丙烯酸环己基酯,以及从至少一种单体衍生而来的其他结构单元,这些单体选自由所述式 (x) 所代表的单体和所述式 (y) 所代表的单体组成的组;
(C) 环氧
树脂,包括至少一种在一个分子中具有一个或多个环氧基团的化合物; 以及
(D) 一种聚合
引发剂,能够通过活性能量射线的照射生成
路易斯酸。