Sanyo Electric Co., Ltd.

International Center for Environmental Technology Transfer

Panasonic Corporation

Matsushita Electric Works, Ltd.

Panasonic Electric Works Co., Ltd.

Masaru Hidaka

Toshinobu Haruki

Kenichi Kikuchi

Hiroyuki Yoshida

Takaharu Nakagawa

Tetsuya Maekawa

Toyoyuki Urabe

Hirotsugu Murashima

Masao Takuma

Takumi Izumitani

Keishi Shibata

Junko Matsui

The present invention relates to a method for decomposing, in the presence of subcritical water, a thermosetting resin comprising a polyester moiety and a crosslinking moiety therewith to provide a compound comprising an acid residue derived from the polyester moiety and a residue derived from the crosslinking moiety, and collecting the compound in an efficient yield, specifically, which comprises steps of:

Method for decomposing thermoset resin and recovering decomposition product

The present invention relates to a process for decomposing a polymer into a monomer or oligomer by hydrolysis with sub- or supercritical water. The process of the present invention is characterized in that at least a part of the polymer is a polymer comprising a constitutional unit derived from an organic acid in the molecular structure, and the polymer being contacted with sub- or supercritical water in the presence of a water-insoluble base.

Depolymerization process

The present invention provides a method for decomposing a plastic so as to recycle useful substances therefrom as raw materials for a similar plastic. In particular, the present invention provides a method for decomposing a plastic, comprising the step of treating a thermosetting resin comprising a polyester and its crosslinking moiety, with subcritical water of a temperature lower than the thermal decomposition temperature of the thermosetting resin. According to the present invention, the thermosetting resin can be decomposed into a polyhydric alcohol, a polybasic acid and a compound comprising an acid residue derived from the polyester and a residue derived from the crosslinking moiety, without causing a random decomposition of the thermosetting resin.

Method of decomposing plastic

In automatic focusing apparatus of a video camera, any of the entire area, the central area and the midmost area of a picture is selected as an in-focus target area, so that an automatic focusing operation is performed in accordance with a focus evaluating value of the in-focus target area. When the entire area of the picture is selected as the in-focus target area, a focus evaluating value of the central area of the picture is simultaneously evaluated. When the automatic focusing operation starts, the entire area of the picture is selected as the in-focus target area, and if the focus evaluating value of the central area becomes higher than a predetermined value, the in-focus target area is switched to the central area of the picture. When the midmost area of the picture is manually set as the in-focus target area, the midmost area is selected with priority as the in-focus target area.

Automatic focusing apparatus and automatic focusing method for

In an automatic focusing apparatus of a video camera, a first focus evaluating value which steeply changes and a second focus evaluating value which gently changes relative to the position of a lens, are detected in response to a video signal obtained in an image sensing circuit (4). A switching circuit (19) alternately selects the first and second focus evaluating values every one field to apply the same to in-focus state detecting circuits (20, 21), respectively. The in-focus state detecting circuits (20, 21), together with a focusing motor control circuit (10), perform an automatic focusing operation by hill-climbing control. In addition, a calculating circuit (22) calculates the relative ratio of the first focus evaluating value to the second focus evaluating value. The focusing motor control circuit (10) sets the rotational speed of a focusing motor (3) to a normal speed when the calculated relative ratio is smaller than a predetermined value while setting the rotational speed of the focusing motor (3) to a low speed when it is larger than the predetermined value. Therefore, a lens (1) is moved at low speed when the focusing lens is in the vicinity of the in-focus position while being moved at high speed when it is in the defocused state.

Automatic focusing apparatus having a variable focusing speed and

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Nara, Japan

Masaru Hidaka