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    • 8. 发明公开
    • ULTRAVIOLET-CURABLE COATING AGENT AND MOLDED ARTICLE
    • UV-HÄRTBARESBESCHICHTUNGSMITTEL UND FORMARTIKEL
    • EP2145930A1
    • 2010-01-20
    • EP08752322.1
    • 2008-05-02
    • Idemitsu Technofine Co. Ltd
    • TSUBOKURA, YutakaMACHIDA, YoshinoriFUKATSU, Fumioki
    • C09D4/00B41J2/01B41M5/00B41M5/50B41M5/52C09D133/26C09D175/04G11B7/24G11B7/254G11B7/257
    • B41M5/52B41M5/5209B41M5/5254B41M5/5281C08G18/348C08G18/44C08G18/4825C08G18/6659C08G18/6692C08G18/672C09D4/06C09D133/14C09D175/16G11B7/252G11B7/2542C08G18/0823
    • A ultraviolet-curable coating agent contains: a hydrophilic polymer having the specific structure represented by the following general formula (1); a polymerization-reactive urethane oligomer; a water-soluble monomer; a photo polymerization initiator; and a water-absorptive filler. The polymerization-reactive urethane oligomer is preferably formed of a carboxyl-group-containing dihydroxyl compound, polymer polyol, organic diisocyanate compound and hydroxyl-group-containing acrylic ester, and a number average molecular weight of the polymerization-reactive urethane oligomer is preferably 1000 to 10000. By applying the ultraviolet-curable coating agent onto a front face of a substrate, an ink-receiving layer having excellent ink absorptivity, drying characteristics of printed images, bleeding resistance, anti-tacking and water resistance can be formed.

      where: P represents an integer of 2 or more;
      R1 represents -H or -CH 3 ;
      R2 represents -H or an alkyl group represented by -C m H 2m +1 (in which m is an integer of 1 to 8);
      R3 represents an alkylene group represented by -C n H 2n - (in which n is an integer of 1 to 8); and
      R4 and R5 each represent -H or an alkyl group represented by -C o H 2o +1 (in which o is an integer of 1 to 8).
    • 紫外线固化型涂料含有:具有下述通式(1)表示的具体结构的亲水性聚合物; 聚合反应性氨基甲酸酯低聚物; 水溶性单体; 光聚合引发剂; 和吸水填料。 聚合反应性氨基甲酸酯低聚物优选由含羧基的二羟基化合物,聚合物多元醇,有机二异氰酸酯化合物和含羟基的丙烯酸酯形成,聚合反应性氨基甲酸酯低聚物的数均分子量优选为1000 通过将紫外线固化性涂布剂涂布在基材的正面上,可以形成具有优异的油墨吸收性,印刷图像的干燥特性,耐渗色性,抗粘合性和耐水性的油墨接收层。 其中:P表示2以上的整数, R1表示-H或-CH 3; R2表示-H或由-C m H 2m + 1表示的烷基(其中m为1〜8的整数)。 R3表示由-C n H 2n - (其中n为1至8的整数)表示的亚烷基; R 4和R 5各自表示-H或由-C o H 2o + +1表示的烷基(其中o为1〜8的整数)。