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    POLYVINYL ACETAL RESIN
    2.
    发明公开
    POLYVINYL ACETAL RESIN 审中-公开

    公开(公告)号：EP3981800A1

    公开(公告)日：2022-04-13

    申请号：EP20867091.9

    申请日：2020-09-25

    申请人： Sekisui Chemical Co., Ltd.

    发明人： NAKAMURA, Kazuto ,  ARAI, Yoshito ,  HIGUCHI, Isao

    IPC分类号： C08F8/28 ,  C08F16/38 ,  C04B35/634 ,  H01G4/30

    摘要： The present invention provides a polyvinyl acetal resin which leaves less fine undissolved matter when dissolved in an organic solvent and thus can improve productivity particularly when used as a binder for a ceramic green sheet, and which can also provide a ceramic green sheet having excellent toughness and enables production of a highly reliable multilayer ceramic capacitor. Provided is a polyvinyl acetal resin having: a wavenumber A (cm -1 ) of a peak within a range of 3,100 to 3,700 cm -1 in an IR absorption spectrum measured using an infrared spectrophotometer; and a hydroxy group content (mol%), the wavenumber A of the peak and the hydroxy group content satisfying relations of the following formulas (1) and (2): 3,470 − A / Hydroxy group content ≤ 5.5 3,470 − A ≤ 185 wherein A is a wavenumber which is lower than 3,470 cm -1 and at which a transmittance a (%) satisfying [100 - (100 - X)/2] is exhibited, where X (%) is a minimum transmittance of the peak within the wavenumber range of 3,100 to 3,700 cm -1 .

    POLYVINYL ACETAL RESIN, SLURRY COMPOSITION PREPARED THEREFROM, CERAMIC GREEN SHEET, AND MULTILAYER CERAMIC CAPACITOR
    8.
    发明公开
    POLYVINYL ACETAL RESIN, SLURRY COMPOSITION PREPARED THEREFROM, CERAMIC GREEN SHEET, AND MULTILAYER CERAMIC CAPACITOR 有权
    POLYVINYLACETALHARZ，DARAUS HERGESTELLTE BREIZUSAMMENSETZUNG，KERAMISCHEGRÜNFOLIEUND MEHRSCHICHTIGER KERAMIKKONDENSATOR

    公开(公告)号：EP2607390A1

    公开(公告)日：2013-06-26

    申请号：EP11818159.3

    申请日：2011-08-12

    申请人： Kuraray Co., Ltd.

    发明人： SHIMAZUMI Yuhi

    IPC分类号： C08F16/38 ,  C04B35/632 ,  H01G4/12 ,  H01G4/30

    CPC分类号： C09D129/04 ,  C04B35/4682 ,  C04B35/6342 ,  C04B2235/3236 ,  C08F116/06 ,  C08F216/38 ,  C08K3/22 ,  C08K5/01 ,  C08K2003/2241 ,  H01G4/12 ,  H01G4/30

    摘要： According to the present invention, provided is a polyvinyl acetal resin capable of obtaining a ceramic green sheet that has sufficient mechanical strength, in which the dimensional change in the storage of ceramic green sheet is small, and the delamination hardly occurs in the delipidation.
    The present invention relates to a polyvinyl acetal resin that has a degree of polymerization of 200 or more to 6000 or less, a content percentage of vinylester unit of 0.01 to 30 mol%, a degree of acetalization of 55 to 83 mol%, and a structural unit represented by Chemical formula (1):

    in a molecule.

    摘要翻译： 根据本发明，提供一种聚乙烯醇缩醛树脂，其能够获得具有足够的机械强度的陶瓷生片，其中陶瓷生片的储存尺寸变化小，并且在脱脂时几乎不发生分层。 本发明涉及聚乙烯醇缩醛树脂，其聚合度为200以上且6000以下，乙烯基酯单元的含有率为0.01〜30摩尔％，缩醛化度为55〜83摩尔％，以及 由化学式（1）表示的结构单元：在一个分子中。