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    • 9. 发明授权
    • Resin composition for stereolithography
    • 用于立体光刻的树脂组合物
    • US08293448B2
    • 2012-10-23
    • US12304962
    • 2007-06-15
    • Takashi ItoTsuneo HagiwaraKenji HirotsuTadashi Murakami
    • Takashi ItoTsuneo HagiwaraKenji HirotsuTadashi Murakami
    • G03C9/00G03C5/00G03F7/00
    • C08F2/50B33Y70/00C08G59/18C08L63/00G03F7/0037G03F7/038
    • Provided is a resin composition for stereolithography that absorbs little water and moisture over time in uncured state, maintains a low moisture absorption rate even under high humidity, and has high curing sensitivity, from which a stereolithography product excellent in the properties, such as dimensional accuracy, mechanical properties, and dimensional stability can be smoothly produced for reduced light irradiation time. The resin composition for stereolithography comprising an oxetane compound expressed by the general formula (I) below: wherein R1 denotes an alkyl group having 1 to 5 carbon atoms, and R2 denotes an alkylene group having 2 to 10 carbon atoms that may contain an ether bond, in the proportion of from 3 to 60 mass % based on the total mass of the resin composition for stereolithography.
    • 提供一种用于立体光刻的树脂组合物,其在未固化状态下随时间吸收几乎没有水分和水分,即使在高湿度下也保持低吸湿率,并且具有高固化灵敏度,由此可以获得诸如尺寸精度的性能优异的立体光刻产品 ,可以平滑地产生机械性能和尺寸稳定性,以减少光照射时间。 用于立体光刻的树脂组合物,其包含由以下通式(I)表示的氧杂环丁烷化合物:其中R 1表示具有1至5个碳原子的烷基,R 2表示可含有醚键的具有2至10个碳原子的亚烷基 ,以用于立体光刻的树脂组合物的总质量为3〜60质量%的比例。
    • 10. 发明授权
    • Process for preparing 4-aminopyrimidine compound
    • 4-氨基嘧啶化合物的制备方法
    • US07619084B2
    • 2009-11-17
    • US11666510
    • 2005-10-28
    • Shigeyoshi NishinoKenji HirotsuHidetaka ShimaTakashi Harada
    • Shigeyoshi NishinoKenji HirotsuHidetaka ShimaTakashi Harada
    • C07D239/02
    • C07D239/42
    • The present invention is to provide a process for preparing a 4-aminopyrimidine compound represented by the formula (3): wherein R1 and R2 each represent a hydrogen atom or group which does not participate in the reaction and which may have a substituent(s), and R1 and R2 may be bonded to each other to form a ring, and R4 represents a hydrogen atom or a hydrocarbon group, which comprises reacting ammonia, a 3-substituted or unsubstituted acrylonitrile compound represented by the formula (1): CR1(CN)═CR2Y  (1) wherein R1 and R2 have the same meanings as defined above, and Y represents an amino group or OR, where R represents a hydrogen atom or a hydrocarbon group, and an organic acid compound represented by the formula (2): (R3O)3CR4  (2) wherein R3 represents a hydrocarbon group, and R4 has the same meaning as defined above.
    • 本发明提供一种制备式(3)表示的4-氨基嘧啶化合物的方法:其中R1和R2各自表示氢原子或不参与反应的基团,并且可以具有取代基, R 1和R 2可以彼此键合形成环,R 4表示氢原子或烃基,其包括使氨,3-取代或未取代的由式(1)表示的丙烯腈化合物:CR1( CN)-CR2Y(1)其中R1和R2具有与上述相同的含义,Y表示氨基或OR,其中R表示氢原子或烃基,和由式(2)表示的有机酸化合物 ):(R3O)3CR4(2)其中R3表示烃基,R4具有与上述相同的含义。