Miyoshi Oil & Fat Co., Ltd.

Tokai Optical Co., Ltd.

Nobuhiro Kaneko

Koji Kawai

Kotaro Kaneko

Yuichi Shishino

Kuniyoshi Okamoto

Daisuke Nakamura

Shingo Ono

Provided is an ultraviolet absorber with a high molar extinction coefficient that is particularly superior in heat resistance, odor suppression at the time of thermal decomposition and long-wavelength absorption, as compared to a conventional ultraviolet absorber. The ultraviolet absorber is an ultraviolet absorber comprising a 2-phenylbenzotriazole derivative having a bonding group represented by the following formula (I) or (II):

Ultraviolet absorber having excellent heat resistance and long-wavelength absorption

Provided is an additive for imparting ultraviolet absorbency, or an additive for imparting a high refractive index, which has satisfactory compatibility with a resin serving as a matrix and can maintain high transparency even if added in high concentrations. Also provided is an additive with which the function of imparting both ultraviolet absorbency and a high refractive index can be realized by means of one kind of additive. This additive is represented by the following Formula (I):

Additive for imparting ultraviolet absorbency and/or high refractive index to matrix, and resin member using same

Provided is a benzotriazole compound that efficiently absorbs ray having a long wavelength of 360-400 nm, i) having excellent solubility in a monomer of a resin raw material, being dissolvable at a high concentration, polymerizing at excellent reactivity, and yielding a high-molecular-weight resin member and a transparent resin member, or ii) having exceptional heat resistance. This benzotriazole compound is represented by formula (I), where at least one of R-Ris represented by formula (i-1), (where Rand R11 are hydrocarbon groups, etc., and Ris represented by formula (i-2) or formula (i-3) (in formula (i-2), Arepresents a divalent group selected from nitrogen-Containing groups, oxygen-containing groups, sulfur-containing groups, phosphorus-containing groups, and phenylene groups, and R-Rand X represent hydrocarbon groups, etc.; and in formula (i-3), Arepresents a divalent group selected from nitrogen-containing groups, oxygen-containing groups, sulfur-containing groups, and phosphorus-containing groups, and Xand Xrepresent hydrocarbon groups, etc.)).

Benzotriazole compound

To provide a plastic lens which can absorb light with a wavelength of 400 to 420 nm with sufficiently high efficiency but is reduced in the absorption of light with a wavelength of around 420 nm or longer, is less affected by harmful light, suppresses yellow coloration and therefore has excellent appearance, suppresses yellowish discoloration over time, and has excellent heat resistance, light resistance, and also optical performance, particularly an excellent Abbe's number. The plastic lens is characterized by containing an ultraviolet absorbing agent represented by the following formula (I): (in the formula, Rto Reach independently represent a monovalent group such as a hydrogen atom, Rrepresents a monovalent sulfur-containing group represented by the following formula (i): (in the formula, Rrepresents a divalent hydrocarbon group with 1 to 20 carbon atoms or the like; Rrepresents a divalent hydrocarbon group with 1 to 20 carbon atoms or the like; Rrepresents a monovalent hydrocarbon group with 1 to 20 carbon atoms; the total number of carbon atoms in R, n number of R, and Ris 30 or less; m represents an integer of 0 or 1; and n represents an integer of 0 to 3)), and a resin material.

Plastic lens

Provided is an additive for imparting ultraviolet absorbency, or an additive for imparting a high refractive index, which has satisfactory compatibility with a resin serving as a matrix and can maintain high transparency even if added in high concentrations. Also provided is an additive with which the function of imparting both ultraviolet absorbency and a high refractive index can be realized by means of one kind of additive. This additive is represented by the following Formula (I): 

There is provided a biocatalyst solvent which is capable of dissolving a biocatalyst in a liquid state while maintaining the activity of the biocatalyst at a high concentration from a low temperature to a high temperature, and is capable of storing the biocatalyst for a long time period; and a biocatalyst solution using the biocatalyst solvent. Disclosed is a biocatalyst solvent which consists of an ionic liquid including a quaternary ammonium cation represented by the following Formula (I) and an anion:[Chemical Formula 1]N[R][R]&#x2003;&#x2003;(I)wherein R's each independently represent a hydroxyalkyl group having one or more hydroxyl groups and an a linear or branched alkyl moiety having 1 to 10 carbon atoms, in which the alkyl moiety may contain an oxygen atom; a carboxyalkyl group having one or more carboxyl groups and a linear or branched alkyl moiety having 1 to 10 carbon atoms, in which the alkyl moiety may contain an oxygen atom; or a hydroxycarboxyalkyl group having one or more hydroxyl groups, one or more carboxyl groups and a linear or branched alkyl moiety having 1 to 10 carbon atoms, in which the alkyl moiety may contain an oxygen atom; R's each independently represent a hydrogen atom, or a linear or branched alkyl group having 1 to 5 carbon atoms; and n represents an integer from 1 to 4.

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Tokyo, Japan

Nobuhiro Kaneko