Copper complex AZO compounds and dyeing methods using said compounds
申请人:Nippon Kayaku Kabushiki Kaisha
公开号:EP0632105A1
公开(公告)日:1995-01-04
A copper complex azo compound represented by the formula:
and a method of dyeing a paper making material and a cellulose fiber or a cellulose-containing fiber with the compound.
A paper making material and a cellulose fiber can be dyed medium blue with a heavy shade and good fastness without using dianisidine, a toxic chemical substance, designated as the Class 1 Specified Chemical Substance (Japan).
ACHROMATIC DYE-BASED HIGHLY-TRANSMISSIVE POLARIZATION ELEMENT, AND POLARIZATION PLATE
申请人:Nippon Kayaku Kabushiki Kaisha
公开号:EP2983020A1
公开(公告)日:2016-02-10
[Problem] To provide a highly-transmissive polarization plate that can express achromatic white when a polarization element is arranged parallel to an absorbing axis, and achromatic black when the polarization element is arranged orthogonal to the absorbing axis.
[Solution] A polarization element, which is obtained from a base material containing a dichromatic dye formed from an azo compound, is characterized in that the single-body transmittance is 35-60%, and a* and b* values, which are acquired for a polarization element or a polarization plate using JIS·Z·8729, have an a* and b* absolute value that is: less than 1 in a single-body transmittance measurement; less than 2 when two sheets of the base material are arranged parallel to the absorbing axis direction and the a* and b* values are measured; and less than 2 when two sheets of the base material are arranged orthogonal to the absorbing axis direction and the a* and b* values are measured.
Achromatic dye-based highly-transmissive polarization element, and polarization plate
申请人:Nippon Kayaku Kabushiki Kaisha
公开号:US10209417B2
公开(公告)日:2019-02-19
A polarization element, which is obtained from a base material containing a dichromatic dye formed from an azo compound, is characterized in that the single-body transmittance is 35-60%, and a* and b* values, which are acquired for a polarization element or a polarization plate using JIS⋅Z⋅8729, have an a* and b* absolute value that is: less than 1 in a single-body transmittance measurement; less than 2 when two sheets of the base material are arranged parallel to the absorbing axis direction and the a* and b* values are measured; and less than 2 when two sheets of the base material are arranged orthogonal to the absorbing axis direction and the a* and b* values are measured.