Mitsui Chemical, Inc. Patent applications |
Patent application number | Title | Published |
20160053135 | POLYAMIC ACID, VARNISH CONTAINING SAME, AND POLYIMIDE FILM - The present invention addresses the problem of providing a high-transparency polyimide film in which the thickness-direction phase difference Rth is kept within a predetermined range. The present invention also addresses the problem of providing a polyamic acid and a varnish used to obtain the polyimide film. In order to overcome the aforementioned problem, the present invention is a polyimide film containing a polyimide obtained by bringing about a reaction between a tetracarboxylic dianhydride and a diamine, the polyimide film having (a) a thickness-direction phase difference Rth of −5 to 100 nm per 10 μm of thickness, (b) a transmittance of 80% or more with respect to light having a wavelength of 400 nm, (c) a haze of 3% or less, and (d) a glass transition point of 250° C. or higher. | 02-25-2016 |
20110256402 | ETHYLENE POLYMER COMPOSITION, METHOD FOR PRODUCING THE SAME, AND MOLDED ARTICLE OBTAINED USING THE SAME - Provided is an ethylene polymer composition which can be obtained with a solid phase method such as solid phase drawing molding, is suitable for producing a molded article having high strength, and has the following properties. This ethylene polymer composition comprises an ethylene polymer (a) with an intrinsic viscosity [η] of not less than 2 dL/g and not more than 20 dL/g and an ethylene polymer (b) with an intrinsic viscosity [η] of more than 35 dL/g and not more than 50 dL/g, with the mass ratio (a)/(b) being from 0/100 to 50/50 and the [η] for the entire composition being more than 30 dL/g and not more than 50 dL/g. The method for producing the ethylene polymer composition includes, for example, the polymerization of an ethylene-containing olefin under specific conditions using a catalyst for olefin polymerization which comprises a solid titanium catalyst component comprising magnesium, a halogen and titanium. | 10-20-2011 |
20110110638 | POLYMERIC OPTICAL WAVEGUIDE FILM - This invention provides a polymeric optical waveguide film possessing excellent sliding and bending resistance and machinability. This polymeric optical waveguide film is a bendable polymeric optical waveguide film comprising a first clad layer, a second clad layer, and a core held between the first and second clad layers. This polymeric optical waveguide film has grooves provided by a cutting process. A polymeric material constituting a layer, which is located on the outside of the core when the polymeric optical waveguide film is bent and a part or the whole of which has been cut in the thickness-wise direction by the cutting operation, has a tensile modulus of not less than 0.1 GPa and less than 1 GPa as measured at room temperature using a test piece having a thickness of 0.06 mm. | 05-12-2011 |