Sumitomo Chemical Company, Limited

Sumitomo Chemical Companylimited

Shinnosuke Yoshioka

Daichi Fujimoto

Haruki Okawa

Tatsuaki Kasai

Katsuaki Miyazaki

Nobuyuki Hatanaka

Noriyuki Hida

Shoichi Ozawa

A liquid crystal composition is provided containing a polymerizable liquid crystal compound, the composition having high preservation stability when dissolved in a solvent and also having the ability to restrain the development of orientation defects of the liquid crystal compound. A method of producing such a liquid crystal composition is also provided with ease. The liquid crystal composition includes a first polymerizable liquid crystal compound having five or more ring structures on its principal chain and represented by the following formula (A) and a second polymerizable liquid crystal compound having five or more ring structures and represented by the following formula (B).

Liquid crystal composition, method of producing the same, and retardation film constituted from the same

Disclosed is a retardation film which shows a high light selective absorbency to visible rays having short wavelengths near 400 nm to have a high light resistance, and which can give, when used in a display device, good display properties to the display device. This film is a retardation film, satisfying all of the following formulae (1) to (4): 2&#x2264;A(380) (1), 0.5&#x2264;A(400) (2), 0.4&#x2265;A(420)/A(400) (3), and 100 nm&#x2264;Re(550)&#x2264;170 nm (4), in which each A(&#x3bb;) represents the absorbance of the film at a wavelength &#x3bb; nm, and Re (550) represents the in-plane retardation value of the film to a light ray having a wavelength of 550 nm.

Retardation film

A compound capable of suppressing the occurrence of alignment defects and lowering the phase transition temperature of a liquid crystal composition without impairing optical characteristics is provided. In particular, a compound represented by formula (A) is provided in which the variable groups are as defined in the specification. 

Compound, liquid crystal composition, optical film, polarizing plate, and optical display

A liquid crystal composition containing a polymerizable liquid crystal compound (A) having 5 or more ring structures in its main chain and a polymer (B) of the polymerizable liquid crystal compound (A) having 5 or more ring structures in its main chain, which inhibits occurrence of an orientation defect of a liquid crystal compound and exhibits excellent storage stability when dissolved in a solvent is provided.

Liquid crystal composition

The object of the present invention is to provide a light absorptive compound which is capable of selectively absorbing light around a wavelength of 400 nm, and is excellent in solubility in various solvents and/or affinity with hydrophobic substances. Also, the object of the present invention is to provide an optical film containing such a light absorptive compound, and a cured layer. A compound represented by the following formula (I): 

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Osaka, Japan

Shinnosuke Yoshioka