Mitsubishi Rayon Company, Limited

Mistubishi Rayon Co., Ltd.

Hiroki Hatakeyama

Naoki Yamamoto

Suehiro Tayama

Akira Yanagase

Kazuhiko Nakagawa

Yukio Kitaike

Hiroyuki Watanabe

Kiyotaka Azegami

Akira Nakata

Isao Sasaki

Hiroshi Mori

Masaharu Fujimoto

Osamu Kawai

Kazuaki Hayashida

Toshio Nagasaka

Hideyuki Sugamoto

Toshimi Yanai

Tomonori Terasawa

Yoshiko Sano

Takao Marutani

A method of producing an acrylic resin plate, comprising a step of adding 0.001 to 1 part by weight of a polymerization initiator having 10 hours half life temperature of 80&#xb0; C. or more and 0.015 to 0.2 parts by weight of cyclohexadiene or terpenoid-based compound into 100 parts by weight of a mixture composed of an alkyl methacrylate having a C1-4 alkyl group and a poly-functional (meth)acrylate to give a polymerizable mixture, and a step of polymerizing said polymerizable mixture; an acrylic resin comprising 3 to 30 wt % of an alkyl methacrylate unit having a C8-20 alkyl group, 2 to 35 wt % of a mono-ethylenically unsaturated monomer unit containing an alkyl methacrylate unit having a C1-4 alkyl group and 35 to 95 wt % of a poly-functional (meth)acrylate unit; an acrylic resin plate made of the resin and production process the same, and a transparent electrode plate for touch panel and a touch panel having them.

Acrylic resin, resin boards, transparent electrode boards for touch panels, touch panels, and processes for production of them

Disclosed is a resin composition having excellent impact resistance and resistance to whitening by impact without deteriorating excellent transparency of a methacrylic resin. Specifically, an impact resistance modifier composed of a multilayered polymer having at least three layers, namely an innermost-layer polymer derived from an alkyl methacrylate, an intermediate-layer polymer derived from an alkyl acrylate and an outer-layer polymer having its Tg within the range of 20 to 80&#xb0; C., wherein mass average particle diameter of the intermediate-layer polymer is 200 to 300 nm and the mass ratio of each layer is within an appropriate range, is blended with a methacrylic resin.

Impact resistance modifier and resin composition

A process for production of methacrylic copolymers, characterized by charging a monomer mixture comprising from 70 to 95% by weight of methyl methacrylate, from 0 to 15% by weight of &agr;-methylstyrene, from 0 to 20% by weight of styrene and from 2 to 15% by weight of maleic anhydride at a molar ratio of the sum of &agr;-methylstyrene and styrene to maleic anhydride laying within the range of 1.0 to 2.5 into a polymerizing vessel containing at least one polymeric membrane layer having an oxygen permeability of 1.5&times;10 (mol&middot;m &middot;s &middot;Pa ) or below, sealing the polymerizing vessel, and polymerizing the monomer mixture under heating in a gas phase; a methacrylic copolymer obtained by the production process which is reduced yellowing and shows excellent transparency and heat resistance; and an optical element composed of the methacrylic copolymer.

Heat-resistant methacrylic copolymers, production process thereof and optical elements

An acrylic film with excellent flexibility is easy to process and has 70 to 95 parts by weight of an acrylic rubber-containing polymer (A) and to 30 parts by weight of an acrylic-based thermoplastic polymer (B) and having a total amount of (A) and (B) of 100 parts by weight; a gel content of 50 to 70% by weight; and elongation at break in one direction of 180% or more. The acrylic rubber-containing polymer (A) has an elastic copolymer having a monomer unit whose polymer has a glass transition temperature of more than 65&deg; C. The acrylic-based thermoplastic polymer (B) has a glass transition temperature of 65&deg; C. or less and a weight average molecular weight of 100,000 to 300,000.

Acrylic films and acrylic laminates

Acrylic film-laminated molded article and acrylic film

Disclosed is a technology for providing a thermoplastic resin composition or resin laminate having an excellent mat property by using, as matting agent, a copolymer (B) prepared by polymerizing 0.5 to 80% by weight of a hydroxyalkyl (meth)acrylate having a C.sub.1-8 alkyl group and 10 to 99% by weight of an alkyl methacrylate having a C.sub.1-13 alkyl group, with a C.sub.1-8 alkyl acrylate, vinyl aromatic monomer, another vinyl monomer, and a cross-linking monomer being optional.

Mat thermoplastic resin composition and laminate therefrom, matting

Composite composition having high transparency and process for producing

Disclosed is a composite composition obtained by polymerizing a radical-polymerizable vinyl compound (A) in the presence of a silica polycondensate (B) formed by hydrolysis and polycondensation of at least one alkoxysilane compound in a dispersion system of colloidal silica. This composite composition has high transparency, rigidity, toughness and thermal resistance and is hence useful in applications where inorganic glass has heretofore been used.

Disclosed is a composite composition obtained by polymerizing a radical-polymerizable vinyl compound (a) in the presence of a silicic acid oligomer (b) and, if desired, colloidal silica (c). This composite composition has high transparency, thermal resistance, rigidity and toughness and is hence useful in applications where inorganic glass has heretofore been used.

A synthetic resin molded article having a good antistatic property, includes a synthetic resin substrate and a film of an antistatic polymer formed on the surface of the substrate. The antistatic polymer is prepared by polymerizing an anionic monomer represented by the formula (I) or a mixture of the anionic monomer and a monomer copolymerizable therewith: ##STR1## wherein R.sub.1 is H or --CH.sub.3, A.sub.1 ##STR2## or phenylene, X is N or P, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 independently represent an alkyl, aryl or aralkyl group which may have a substituent, n is 0, 1 or 2, B is an alkylene, arylene or aralkylene group which may have an ester bond, and R.sub.6 is H or an alkyl group.

Synthetic resin molded article having good antistatic property and

A process for the preparation of a synthetic resin-shaped article having good antistatic properties is provided, which entails a) polymerizing a monomer mixture containing monomers (A), (B) and (C) to form a first copolymer; b) subsequently polymerizing monomers (D) and (E) in the presence of the first polymer to prepare a second copolymer; forming a film of the second copolymer on the molding surface of a casting mold; and supplying a starting material capable of forming a synthetic resin into the casting mold and polymerizing the starting material to form the substrate in the casting mold, thereby transferring the film of the previous step to the surface of the substrate from the molding surface of the casting mold.

Process of molding antistatic resin shaped articles

A synthetic resin molded article having a good antistatic property, which including a synthetic resin substrate and a film of an antistatic polymer formed on the surface of the substrate. The antistatic polymer is prepared by polymerizing an anionic monomer represented by the formula (I) or a mixture of the anionic monomer and a monomer copolymerizable therewith: ##STR1## R.sub.2, R.sub.3, R.sub.4 and R.sub.5 independently represent an alkyl, aryl or aralkyl group which may have a substituent, n is 0, 1 or 2, B is an alkylene, arylene or aralkylene group which may have an ester bond, and R.sub.6 is H or an alkyl group.

Process for preparing synthetic resin molded articles having good

Disclosed is a resin composition comprised of (A) 100 parts by weight of a polymer containing at least 10% by weight of methacrylimide units and (B) 0.5 to 20 parts by weight of a specific polyhydric alcohol compound and/or a specific compound having polyoxyethylene segments. This resin composition provides a shaped article having a good antistatic property and heat resistance.

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Otake, Japan

Hiroki Hatakeyama