Asahi Kasei Kabushiki Kaisha

Nec Corporation

Atsushi Ohkubo

Nobuhisa Miyake

Masaaki Shinohata

Yuji Kosugi

Koichi Nakaoka

Yusuke Ishii

Yusuke Sakurai

Kazuhiro Takagaki

Takeharu Sasaki

Tsubasa Uematsu

An isocyanate composition according to the present invention contains: a difunctional or more-functional isocyanate compound; and 1.0 ppm by mass to 1.0&#xd7;10ppm by mass, based on the isocyanate compound, of a compound having at least one unsaturated bond excluding unsaturated bonds constituting an aromatic ring, the compound being different from the isocyanate.

Isocyanate composition and method for producing isocyanate polymer

The present invention provides an isocyanate composition including an isocyanate compound having an ethylenically unsaturated bond, a compound represented by formula (1) (in the formula, Rrepresents an a-valent organic group, Rrepresents a monovalent organic group, a represents an integer of 1 or 2), and/or a compound having a UV absorption in a spectral region of a decamer or higher isocyanate measured by gel permeation chromatography; and an isocyanate composition including an isocyanate compound having an ethylenically unsaturated bond, or a compound having at least one unsaturated bond other than an unsaturated bond constituting an aromatic ring or an inert compound such as a hydrocarbon compound or the like and having a carbon-carbon unsaturated bond other than an unsaturated bond constituting an aromatic ring; or the likeR&#x2014;(COO&#x2014;R)&#x2003;&#x2003;().

Isocyanate composition, method for producing isocyanate polymer and isocyanate polymer

An isocyanate composition according to the present invention contains an isocyanate compound of formula (1) and/or (2) (wherein Rrepresents a hydrogen or a monovalent organic group, and Rrepresents a monovalent organic group), and, relative to the total mass of the isocyanate compound in the composition, 1.0 ppm by mass to 10% by mass of a compound of formula (3): R&#x2014;(COO&#x2014;R)a (wherein Rrepresents an organic group with a valence of a, Rrepresents a monovalent organic group, and a represents an integer of 1 or 2), which is different from the isocyanate compound, and/or, 1.0 ppm by mass to 10% by mass of a compound having an UV absorption in an area of decamer or higher isocyanates in a measurement spectrum of gel permeation chromatography. 

Isocyanate composition, method for producing isocyanate composition, and method for producing isocyanate polymer

An isocyanate production method according to the present invention is a method in which an isocyanate is produced by subjecting a carbamate to thermal decomposition, and includes: a step of preparing a mixture liquid containing the carbamate, an inactive solvent and a polyisocyanate compound; a step of conducting a thermal decomposition reaction of the carbamate by continuously introducing the mixture liquid into a thermal decomposition reactor; a step of collecting a low-boiling decomposition product by continuously extracting the low-boiling decomposition product in a gaseous state from the reactor, the low-boiling decomposition product having a boiling point lower than the polyisocyanate compound; and a step of collecting a high-boiling component by continuously extracting, from the reactor, a liquid phase component which is not collected in a gaseous state at the step of collecting the low-boiling decomposition product.

Isocyanate production method

In a teleconference system, the computer disposed in each teleconference terminal apparatus for line reservation becomes unnecessary. An image generator of a center generates image information to display a list of numeric and nonnumeric characters. An image display unit of the teleconference terminal apparatus receives the image information via a communication line to display a list of numeric and nonnumeric characters on a monitor screen. When a user operates a position input operation from an input device, the input device accordingly generates positional information, and a pointer display unit display a pointer image at a position of the monitor screen indicated by the positional information. Each time the user moves the pointer image to a position of a desired numeric or nonnumeric character and conducts a selection determining operation from the input device, an information transmitter sends positional information to the center. In the center, an information receiver receives the positional information. In accordance with the image and positional information, a line reserving unit recognizes time and a user by interpreting numeric and nonnumeric characters thus selectively inputted and reserves a communication line.

Line reserving system for multipoint teleconference

The picture data transmission device for use in the transmission of a picture in a television system includes a picture input circuit, a region extraction processing circuit for extracting, from an input picture signal, a picture signal of a predetermined region in a picture frame of the picture in question, a picture coding circuit for coding and outputting a picture signal of a region extracted, and a network interface circuit for transmitting a coded signal to a terminal device of other conference participant, the region extraction processing circuit extracting, from a picture frame, a picture signal of a target picture region containing a target picture and a picture signal of a part of a background region which is a region other than the target picture region in question and transferring the signals to the picture coding means, as well as selecting, in each picture frame, a different part of the background region as a part of the background region to be extracted.

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Tokyo, Japan

Atsushi Ohkubo