Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
OPTICAL POLYMER MATERIAL, OPTICAL FILM, DISPLAY DEVICE, OPTICAL POLYMER MATERIAL MANUFACTURING METHOD, AND OPTICAL FILM MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2021/132519
Kind Code:
A1
Abstract:
This optical polymer material includes an alternating copolymer comprising a styrene derivative monomer and a maleimide derivative monomer, and has a nonlinear property wherein the photoelastic coefficient decreases down to a prescribed value in accordance with increasing the composition ratio of the styrene derivative, but rises above the prescribed value if the composition ratio of the styrene derivative is further increased. The composition ratio of the styrene derivative is within a prescribed range. Within this composition ratio range, the absolute value of the photoelastic coefficient is less than or equal to a first absolute value, and the absolute value of the intrinsic birefringence is less than or equal to a second absolute value.

Inventors:
KOIKE YASUHIRO (JP)
KOBAYASHI YUMA (JP)
WATANABE KOHEI (JP)
Application Number:
PCT/JP2020/048579
Publication Date:
July 01, 2021
Filing Date:
December 24, 2020
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KOIKE YASUHIRO (JP)
International Classes:
G02B5/30; B29D11/00; C08F212/08; C08F222/40; C08J5/18
Domestic Patent References:
WO2014061648A12014-04-24
Foreign References:
JP6114459B12017-04-12
JP2008094912A2008-04-24
JP2011048025A2011-03-10
JP2015197433A2015-11-09
JP2009179731A2009-08-13
JP2008242349A2008-10-09
JPS61218607A1986-09-29
JPS6128540A1986-02-08
JP2012203328A2012-10-22
JPS6479208A1989-03-24
Other References:
M. D. SHIKANAIA. TAGAYAY. KOIKE, APPL. PHYS. LETT., vol. 108, 2016, pages 131902
I. SKEIST, J. AM. CHEM. SOC., vol. 68, 1946, pages 1781
M. FINEMANS. D. ROSS, J. POLYM. SCI., vol. 5, no. 2, 1949, pages 259 - 265
R. KITAMURA, KOBUNSHI, vol. 14, no. 160, 1965, pages 564 - 573
H. AIDAI. TAKASEM. KOBAYASHI: "Research Report of the Department of Engineering", vol. 31, 1985, UNIVERSITY OF FUKUI, pages: 43 - 50
T. OISHIM. FUJIMOTOY. HARUTA, KOBUNSHI RONBUNSHU, vol. 48, no. 3, 1991, pages 123 - 128
See also references of EP 4083669A4
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
Download PDF: