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AssigneesTosoh Corporation, Sagami Chemical Research Institute
InventorsHiroki ICHIJO, Ryuichi SAKASHITA, Noritake MURAKAMI, Yuki SHICHIDA, Ayato INABA, Takahiro KITAGAWA, Taiyo YOKOI, Kouta IBE, Osamu KOBAYASHI
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A main chain polymer comprises, in its main chain, a photoreactive reverse wavelength dispersion unit exhibiting photoreactivity and reverse wavelength dispersion of birefringence, the photoreactive reverse wavelength dispersion unit has a structure of formula (1): L1 and L2 are the same or different, each is a carbonyl group, an ester linkage, an amide linkage, an ether linkage or a single bond; * represents a site of binding with another structure in the main chain polymer; Ar is a ring system selected from a monocyclic aromatic ring system, a polycyclic aromatic ring system and an annulated aromatic ring system whose ring-constituting atoms are atoms selected from a carbon atom, a nitrogen atom, an oxygen atom and a sulfur atom, with the monocyclic aromatic ring system, polycyclic aromatic ring system or annulated aromatic ring system optionally having a substituent; R0, R1, R2, R3 and R4 each independently are a hydrogen atom, a halogen atom or a C1 to C8 alkyl group.
A main chain polymer comprising, in a polymer main chain thereof, a photoreactive reverse wavelength dispersion unit that exhibits both functions of photoreactivity and reverse wavelength dispersion of birefringence, wherein:
A dihydroxy compound represented by the following formula (1′):
A method for producing a dihydroxy compound, the method comprising allowing a dihydroxy compound the following formula (3) and a ketone the following formula (4′) to react together to obtain a dihydroxy compound represented by the following formula (1′),
Dependencies are inferred from the claim text.