Kuraray Co., Ltd.

Tatsufumi Watanabe

Katsuya Fujisawa

Junichi Tanaka

Atsushi Nagasawa

Kenichi Hamada

Takahiro Kitano

Kazushige Ishiura

Yoshihiro Morishita

Hiroshi Oshima

Shinji Hiramatsu

Kazunori Watanabe

Masaji Kato

Hirofumi Tanabe

Susumu Matsunaga

Jun Nagai

Tatsuo Morotomi

To provide a method of bonding two materials directly with each other, at least one of which is made of a plastic material, which method is applicable to bonding two materials, with no need to use any bonding agent and without allowing the materials to be exposed to high temperature and/or high pressures. In this method in which a first member made of a plastic material and a second member are bonded together, one surface of the first member to be bonded with the second member is irradiated with energy rays having a quantity of energies not lower than 4 eV, followed by directly bonding the first and second members together without any bonding agent being used.

Plastic bonding method

The present invention relates to a method of obtaining a (meth)acrylate-based polymer from a reaction solution containing the (meth)acrylate-based polymer, the method including (a) adding an acid to the reaction solution containing the (meth)acrylate-based polymer which is obtained by polymerizing a monomer composed mainly of a (meth)acrylate in a water-insoluble organic solvent in the presence of a metal compound, (b) washing the reaction solution to which the acid has been added by admixing water at 90&#xb0; C. or more, (c) separating the mixed solution of the reaction solution and water generated by the washing in (b) into an organic solvent solution layer and an aqueous solution layer, and (d) isolating each of the organic solvent solution layer and the aqueous solution layer in order to obtain the (meth)acrylate-based polymer from the isolated organic solvent solution layer.

Method of taking (meth)acrylic ester polymer out of liquid reaction mixture

A continuous production process, for producing an (meth)acrylic ester (co)polymer comprises the step of continuously feeding an organoaluminum compound-containing polymerization initiator solution and an (meth)acrylic ester into a reactor to continuously obtain a living polymer-containing polymer reaction liquid. The {[molar quantity of methacrylic ester or acrylic ester]/([molar quantity of organoaluminum compound]&#x2212;[molar quantity of polymerization initiator])} fed into the reactor is regulated to be 15 to 80, and the content of the (meth)acrylic ester in the total feed amount of a polymerization initiator solution and an (meth)acrylic ester fed into the reactor is regulated to not more than 5% by mass.

Process for continuously producing (meth)acrylic ester polymer or copolymer

Disclosed is an optical device which can be formed as a thinner layer by a simplified manufacturing process at a reduced cost. Specifically, the optical device has a multilayer structure wherein a polyvinyl alcohol- or polyvinylene-base polarizing film (b) and protective films (a and c) are directly laminated on top of another without any adhesive layer including a pressure sensitive adhesive layer interposed therebetween. The protective film (c) on one side is composed of a triacetyl cellulose, an alicyclic polyolefin resin, or an alicyclic acrylic resin, and the protective film (a) on the other side is composed of a triacetyl cellulose, a polycarbonate, a polyethylene terephthalate, a polyethylene naphthalate, a (meth)acrylate resin, an alicyclic polyolefin resin, or an alicyclic acrylic resin.

Optical device provided with polarizing plate

The invention relates to a lens sheet applicable to a screen for a pixel type projection TV characterized in high quality and definition and a simple producing method thereof. The inventive lens sheet has a shielding layer without any axial misalignment at front and rear sides. The lens sheet comprises a lens portion with a plurality of lens elements arranged in at least one side and a shielding layer provided in a non-transmitting portion of a light radiation plane, in which the shielding layer is provided on a layer made of a cured photo-curing composition (A). The photo-curing composition (A) is composed of 100 weight parts of photo-curing resin composition (a) having a surface free energy of 30 mN/m or more and 0.01 to 10 weight parts of compound (b) having a surface free energy of 25 mN/m or less.

Lens sheet and method for producing it

Growing community of inventors

Tsukuba, Japan

Tatsufumi Watanabe