Title:
COLOR CHANGING MEMBER
Document Type and Number:
Japanese Patent JP2021155473
Kind Code:
A
Abstract:
To provide a color changing member with an improved color changing property.SOLUTION: A color changing member comprises: a 4-methyl-1-pentene-based polymer (a) which has, in a range of 10°C to 100°C, one or more temperatures that show maximum values of loss tangent (tan δ) which are obtained by a dynamic viscoelasticity measurement under conditions of a rate of temperature increase of 4°C/min, a frequency of 1.59 Hz, and a strain amount of 0.1% and which shows a maximum value of the loss tangent of 0.5 to 3.5; and a leuco dye-based thermochromic material (b) which has a color changing temperature in a range of 15 to 40°C, where relative to a total of 100 pts.mass of the 4-methyl-1-pentene-based polymer (a) and the thermochromic material (b), the thermochromic material (b) is preferably 0.7 to 15 pts.mass.SELECTED DRAWING: None
Inventors:
YOSHII HIROAKI
Application Number:
JP2020053980A
Publication Date:
October 07, 2021
Filing Date:
March 25, 2020
Export Citation:
Assignee:
MITSUI CHEMICALS INC
International Classes:
C08L23/20
Attorney, Agent or Firm:
Shinji Hayami