| 摘要 |
PROBLEM TO BE SOLVED: To provide a formed body having selective reflection properties with respect to wavelengths and circularly polarized light. SOLUTION: A selectively reflective soln. containing a cellulose deriv. and polymerizable solvent is polymerized to obtain a formed body. The cellulose drive. has about 2.2 to 3 alkyl substitution degree, about 0 to 0.8 acyl substitution degree, and about 2.8 to 3 sum of the alkyl substitution degree and acryl substitution degree. An example of such a cellulose deriv. is alkylcellulose (ethylcellulose) or acylated alkylcellulose having a high substitution degree. As for the polymerizable solvent, (meth)acrylic monomers such as (meth)acrylic acid can be used.
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