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Doyama
Kazuo Doyama, Tsukuba-Shi JP
| Patent application number | Description | Published |
|---|---|---|
| 20090299062 | THERMOSETTING COMPOUND, COMPOSITION CONTAINING THE SAME, AND MOLDED ARTICLE - The object of the present invention is to provide a thermosetting compound having dielectric properties, in particular permittivity and dielectric loss, which are improved compared to prior art, a composition containing the same, and a molded article. The thermosetting compound according to the present invention is a dihydro benzoxazine compound represented by the following Formula (2), | 12-03-2009 |
| 20100204433 | THERMOSETTING RESIN HAVING BENZOXAZINE STRUCTURE AND METHOD FOR PRODUCING THE SAME - The present invention provides a thermosetting resin having a benzoxazine ring structure represented by the following formula (I): | 08-12-2010 |
Kazuo Doyama, Ibaraki JP
| Patent application number | Description | Published |
|---|---|---|
| 20090054614 | METHOD FOR PRODUCING THERMOSETTING RESIN, THERMOSETTING RESIN, THERMOSETTING COMPOSITION CONTAINING SAME, MOLDED BODY, CURED BODY, AND ELECTRONIC DEVICE CONTAINING THOSE - The present invention provides a method for producing a thermosetting resin having a dihydrobenzoxazine ring structure, characterized by heating and reacting a) a multi-functional phenolic compound represented by the following general formula (I), b) a diamine compound represented by the following general formula (II) and c) an aldehyde compound: | 02-26-2009 |
| 20090187003 | THERMOSETTING RESIN, THERMOSETTING COMPOSITION CONTAINING SAME, AND MOLDED PRODUCT OBTAINED FROM SAME - An object of the invention is to provide a thermosetting resin excellent in dielectric characteristics and heat resistance, and to provide a thermosetting composition comprising the thermosetting resin, as well as a molded product, substrate material for electronic devices and so forth obtained from the thermosetting resin. The present invention provides a thermosetting resin having a dihydrobenzoxazine ring structure represented by formula (I) in a main chain thereof, a thermosetting composition comprising the thermosetting resin, as well as a molded product, substrate material for electronic devices and so forth obtained from the thermosetting resin. | 07-23-2009 |
| 20090318658 | BAKED RESIN PRODUCT AND ELECTRONIC DEVICE COMPRISING SAME - The present invention provides a baked resin product that exhibits an excellent heat resistance and an electronic device that incorporates this baked resin product. The present invention provides a baked resin product obtained by baking a resin composition that contains a main chain-type aromatic benzoxazine structure, wherein the baked resin product has a peak measured by | 12-24-2009 |
Yoshiaki Doyama, Osaka JP
| Patent application number | Description | Published |
|---|---|---|
| 20100253260 | MOTOR DRIVE CONTROL DEVICE - To present a motor drive control device capable of realizing high speed driving by a simple power feeding control method. The motor drive control device of the invention has a three-phase full bridge circuit for adjusting the feeding phase so as to invert the terminal voltage in feeding-off time, by cyclically repeating positive direction feeding period, non-feeding period, negative direction feeding period, and non-feeding period. In high speed driving, the phase is adjusted so as to invert the terminal voltage right after feeding-off, and if not reaching the desired rotating speed, the feeding time is shortened. As a result, the phase angle to the actual applied voltage can be advanced, and high seed rotation by weak-field system driving is realized. When there is a sufficient allowance in the voltage, the phase is adjusted so as to invert the terminal voltage immediately before turning on the feeding, and the feeding time width is adjusted so that the phase relation of the feeding-off time and the terminal voltage inverting time may be a desired relation and the applied voltage and the current phase are optimized, and the maximum efficiency driving is realized. | 10-07-2010 |