Mitsui Chemicals, Inc.

Keio University

Yasuhiro Koike

Takashi Oda

Tadahiro Sunaga

Keisuke Kawashima

Koji Inoue

Hiroshi Miyasako

Hisanori Ohkita

Tomoaki Matsugi

Yasuhisa Kayaba

Hitoshi Onishi

Hiroko Wachi

Katsutoshi Kinoshita

Hirofumi Io

Shingo Yamamoto

Makoto Kiya

Katsuhiro Esashika

Takeshi Osaka

Provided is a photocurable composition used for forming a resin layer of a concave-convex structure including a substrate and a resin layer provided on the substrate and having fine concavities and convexities formed on a surface thereof. A cured film of the photocurable composition has a surface free energy of 15 mJ/mto 40 mJ/mas measured based on the Kitazaki-Hata theory and a hardness of 0.05 GPa to 0.5 GPa as measured using a nanoindenter.

Photocurable composition, method for producing concave-convex structure, method for forming fine concave-convex pattern, and concave-convex structure

A material for forming an underlayer film according to the present invention is a material for forming an underlayer film which is used to form a resist underlayer film used in a multi-layer resist process, the material including a cyclic olefin polymer which has a repeating structural unit [A] represented by Formula (1) and a repeating structural unit [B] represented by Formula (2), in which a molar ratio [A]/[B] of the structural unit [A] to the structural unit [B] in the cyclic olefin polymer is greater than or equal to 5/95 and less than or equal to 95/5.

Material for forming underlayer film, resist underlayer film, method of producing resist underlayer film, and laminate

Medical instrument includes a substrate, in which cells are in contact with or held on a surface of the substrate, and at least the surface of the substrate which holds the cells is formed of a fluorine-containing cyclic olefin polymer which contains a repeating structure unit represented by Formula (1), wherein in Formula (1), at least one of Rto Ris fluorine, an alkyl with 1 to 10 carbon atoms which contains fluorine, an alkoxy with 1 to 10 carbon atoms which contains fluorine, or an alkoxyalkyl with 2 to 10 carbon atoms which contains fluorine, Rto Rare selected from hydrogen and certain non-fluorinated groups when Rto Rdo not contain fluorine, Rto Rmay be the same as or different from each other, and Rto Rmay be bonded to each other to form a cyclic structure.

Medical instrument, cell culture method, fluorine-containing cyclic olefin polymer and fluorine-containing cyclic olefin polymer composition for it, and cultured cells

Provided is a resin material for forming an underlayer film which is used to form a resist underlayer film used in a multi-layer resist process, the resin material including a cyclic olefin polymer (I), in which a temperature at an intersection between a storage modulus (G') curve and a loss modulus (G&#x2033;) curve in a solid viscoelasticity of the resin material for forming an underlayer film which is as measured under conditions of a measurement temperature range of 30&#xb0; C. to 300&#xb0; C., a heating rate of 3&#xb0; C./min, and a frequency of 1 Hz in a nitrogen atmosphere in a shear mode using a rheometer is higher than or equal to 40&#xb0; C. and lower than or equal to 200&#xb0;.

Resin material for forming underlayer film, resist underlayer film, method of producing resist underlayer film, and laminate

A method of producing a substrate with a fine uneven pattern is a method of producing a substrate having a fine uneven pattern on a surface thereof, the method including a step (a) of preparing a laminate provided with a substrate and a first resin layer provided on the substrate and having a first fine uneven pattern formed on a surface thereof; and a step (b) of forming a second fine uneven pattern corresponding to the first fine uneven pattern on the surface of the substrate by etching the surface of the first fine uneven pattern using the first resin layer as a mask, in which the first resin layer is formed of a resin composition (P) including a fluorine-containing cyclic olefin polymer (A) or a cured product of the resin composition (P).

Method of producing substrate with fine uneven pattern, resin composition, and laminate

A culture material including a 4-methyl-1-pentene polymer for cells, tissues, or organs, the culture material having a water contact angle at a culture surface of 50&#xb0; to 100&#xb0;, a sagging distance by a test method described below of 0 to 5 mm, and an oxygen permeation rate at a temperature of 23&#xb0; C. and a humidity of 0% of 4500 to 90000 cm/(m&#xd7;24 h&#xd7;atm). A test piece having the same material as the culture material and the same thickness as the culture surface of the culture material and having a flat plate shape of 100 mm long and 10 mm wide is made. The test piece is fixed onto a test board in a state where the test piece protrudes lengthwise in a horizontal direction from a top surface of the test board, the top surface being horizontal.

Culture material and use thereof

Disclosed is an optical film having low wavelength dispersibility which is obtained by stretching a film formed of a fluorine-containing cyclic olefin polymer including at least one selected from a repeating structural unit represented by the formula described below, wherein a phase difference at a wavelength of 550 nm is greater than or equal to 50 nm, wavelength dispersibility represented by a ratio Re (400 nm)/Re (550 nm) of a phase difference Re (400 nm) at a wavelength of 400 nm to a phase difference Re (550 nm) at a wavelength of 550 nm is 1.00 to 1.05, wavelength dispersibility represented by a ratio Re (400 nm)/Re (800 nm) of a phase difference Re (400 nm) at a wavelength of 400 nm to a phase difference Re (800 nm) at a wavelength of 800 nm is 1.00 to 1.05, and total light transmittance is greater than or equal to 92%. 

Optical film

A fluorine-containing cyclic olefin polymer composition of the present invention includes a fluorine-containing cyclic olefin polymer (A) containing a repeating structural unit represented by the general formula (1) and having a fluorine atom content rate of 40 to 75% by mass; a photocurable compound (B); and a photocuring initiator (C). 

Fluorine-containing cyclic olefin polymer composition, imprint product obtained using the composition, and method for producing the same

Provided is an imprint product, which is for transcribing a fine pattern of a mold surface and which contains a fluorine-containing cyclic olefin polymer containing repeating unit represented by formula (1) and having a fluorine atom content rate of 40% to 75% by mass. 

Imprint product and method for producing the same

Disclosed is an optical material including a cyclic olefin copolymer containing at least a repeating structural unit [A] represented by the general formula (1) and a repeating structural unit [B] represented by the general formula (2) and having a molar ratio [A]/[B] of from 95/5 to 1/99, wherein the absolute value of the ratio &#x394;OB/&#x394;F is from 0.001 to 0.250 in which &#x394;OB represents the amount of a change in the absolute value of the orientation birefringence calculated from the phase difference (nm) at a wavelength of 633 nm/film thickness (&#x3bc;m) in a stretched film obtained from the optical material, and &#x394;F represents the amount of a change in the absolute value of the orientation coefficient determined from the dichroic ratio of parallel light intensity Ito perpendicular light intensity I, each relative to the orientation direction according to Raman spectroscopy. 

Growing community of inventors

Ichihara, Japan

Takashi Oda