Polymer, composition, electrochromic element, dimming device, and display device
US12065535B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2019 |
| Grant date | Aug 20, 2024 |
| Priority date | — |
| Expiry date | Nov 2, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention addresses a first problem of providing a polymer that has electrochromic characteristics, and that can form a sheet which seems more transparent when applied to an electrochromic element and is decolored. The present invention for solving the problem is a polymer obtained by forming a complex between, and binding together, compound A represented by formula 1: BP1-L1-BP2 and at least one specific metal ion selected from the group consisting of first metal ions having a coordination number of 4, second metal ions having a coordination number of 6, and third metal ions having a coordination number of 4 and 6. In the formula, L1 represents a single bond or a divalent group, and BP1 and BP2 may be identical or different from each other and each independently represent a bipyridine derivative.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.