Main-chain polymers, optical films, methods for producing the same, and multilayer films

A main-chain polymer with photoreactive units and a monovalent carboxylic acid ester end group addresses the inefficiencies of existing methods by enabling the production of low-yellowness inverse wavelength dispersion films without alignment films, improving manufacturing efficiency and reducing costs.

JP7876427B2Active Publication Date: 2026-06-19TOSOH CORP +1
View PDF 7 Cites 0 Cited by

Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
TOSOH CORP
Filing Date
2022-11-29
Publication Date
2026-06-19

Smart Images

  • Figure 0007876427000001
    Figure 0007876427000001
  • Figure 0007876427000002
    Figure 0007876427000002
  • Figure 0007876427000003
    Figure 0007876427000003
Patent Text Reader

Abstract

To provide a main chain polymer that enables the production of a film with low yellowness (YI).SOLUTION: A main chain polymer includes, in the polymer main chain, a photoreactive-reverse wavelength dispersion unit which expresses both functions of photoreactivity and reverse wavelength dispersion of birefringence. The main chain polymer has at least one end which is a monovalent carboxylate represented by the following formula (2'). [In the formula (2'), R10 is a group selected from the group consisting of an optionally substituted C1-20 alkyl group, an optionally substituted C3-8 cycloalkyl group, and an optionally substituted C3-12 aromatic group. ** denotes a position of bonding to another structure in the main chain polymer].SELECTED DRAWING: None
Need to check novelty before this filing date? Find Prior Art