Kaneka Corporation

Kaneka Corpation

Tomohiro Abo

Ryutaro Mukai

Hiroto Koma

Shinji Ozawa

Mari Fujii

Katsuya Fujisawa

Takahiro Yasumoto

Provided is a polymer material containing at least one kind of a cellulose derivative having (a) an organosilyl group (the organosilyl group having a first aliphatic group, an unsaturated aliphatic group, or an aromatic group), and (b) an acyl group or a second aliphatic group.

Polymer material, film, circular polarizing plate, image display apparatus, and manufacturing method for film

The retardation film according to the present invention is characterized by: including a polymer material that includes at least one cellulose derivative which includes specific monomer units: having an in-plane retardation Re(550) of 105-160 nm, reverse wavelength dispersion property, Re(450)/Re(550), of 0.80-0.89, and a thickness of 20-50 &#x3bc;m; and containing inorganic particles. In particular, the present invention exhibits the effect of reducing the photoelastic coefficient.

Retardation film and utilization thereof

The present invention achieves a phase difference film that is excellent in wavelength dispersion property, in-plane retardation, and film thickness, by using a polymeric material (i) which is composed of at least one type of cellulose derivative having a specific alkoxyl group substitution degree Dand a specific 2-naphthoyl group substitution degree Dand (ii) which has a specific total 2-naphthoyl group substitution degree D.

Retardation film, and optical compensation layer, optical compensation polarizing plate, liquid crystal display device and organic EL display device each using said retardation film

The object of the present invention is to obtain the polyimide and the polyamic acid excellent in heat resistance, low thermal expansion property, and transparency and achieve low birefringence and to provide a product or a member, demanded to have high heat resistance and transparency, by using the polyimide or the polyamic acid. In particular, the object is to provide a product and a member in which the polyimide or the polyamic acid of the present invention is formed on a surface of an inorganic substance such as glass, metal, a metal oxide, or a single crystal silicon. The objects are attained by introducing a rigid structure and an alicyclic structure into a skeleton and using a monomer having a fluorene skeleton together.

Growing community of inventors

Otsu, Japan

Tomohiro Abo