Polymer film, ultraviolet absorber, merocyanine compound and process for preparing merocyanine compound
US8652364B2 · kind B2 · utility
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2References
7Claims
0Family size
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Key dates
| Filing date | Mar 11, 2011 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | Mar 11, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A polymer film comprising at least one compound represented by formula (I) is disclosed. A1 and A2 each independently represent a group having a Hammett's σp value of 0.2 or more, or bond each other to form a cyclic active methylene structure; and X1 and X2 each independently represent a hydrogen atom, aryl group, hetero-cyclic group, cyano, N-alkyl- or N-aryl-carbamoyl, or alkyl- or aryl-oxycarbonyl, or bond each other to form a saturated ring in which nitrogen and carbon atoms are embedded, and the group and ring may have at least one substituent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.