Mitsubishi Chemical Corporation

Kousuke Fujiyama

Seiichiro Mori

Yusuke Nakai

Tetsuya Noda

Fuminori Nakaya

Go Otani

Taeko Oonuma

Tetsuya Jigami

Masashi Ikawa

Shingo Hikita

Akikazu Matsumoto

Yasuhiko Nabeshima

Masanari Nishimura

The present application pertains to a production method for a polymer, including a step for polymerizing a starting material composition (I) that includes: a monomer mixture (I-1) containing a macromonomer (a) represented by the following formula (1), and (b) a vinyl monomer; and 0.01 to 5 parts by mass of a non-metallic chain transfer agent with respect to 100 parts by mass of the monomer mixture (I-1); a polymer obtained by the production method; and a molded article. According to the present invention, there can be provided a polymer having exceptional resistance to dwell-induced degradation, and a molded article having exceptional yellowing resistance, a low haze value, and exceptional pliability. 

Polymer, production method for same, and molded article

A structure with a substrate, and a fine-unevenness-structure layer provided to at least one surface of the substrate, wherein the fine-unevenness-structure layer is disposed at a surface of the structure, the indentation elastic modulus of the structure is 1-1300 MPa, and the ratio (&#x394;&#x3bc;) of the rate of change of the coefficient of kinetic friction of the surface of the structure is 0.15-1.05, wherein &#x394;&#x3bc;=&#x394;&#x3bc;f/&#x394;&#x3bc;s: &#x394;&#x3bc;s represents the rate of change of the coefficient of kinetic friction of the surface of the structure at an initial-abrasion stage of a reciprocating abrasion test; and &#x394;&#x3bc;f represents the rate of change of the coefficient of kinetic friction of the surface of the structure immediately prior to the end of the reciprocating abrasion test. This structure exhibits excellent scratch resistance without compromising on the optical performance thereof, such as the antireflection performance.

Structure, production method thereof, and article provided with said structure

An acrylic composition, which has excellent flexibility at low temperature and can form a formed body whose adhesion at room temperature is suppressed, the formed body of the acrylic composition, a key sheet of a mobile telephone, and a light guide obtained from the formed body are provided. The acrylic composition contains specific long chain di(meth)acrylate (A) and mono(meth)acrylate (B), and the glass-transformation temperature (TgDMS) of the polymer of the acrylic composition is 40&#xb0; C. or less. The formed body is obtained by polymerization of the acrylic composition, and the key sheet of the mobile telephone and the light guide are obtained from the formed body.

Acrylic composition, formed body, key sheet of mobile telephone, and light guide

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Otake, Japan

Kousuke Fujiyama