Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Chemical Industries Limited

Shoji Takagi

Tsutomu Sasaki

Mitsuhiro Nishida

Kazuo Okahashi

Sakuei Yamamoto

Yasushi Kawashima

Nobuo Sonoda

Naoki Yagi

Atsushi Takimoto

Kenji Honma

Hiroshi Teratani

Kazumi Masuo

Hideaki Urata

Shunichiro Nishizaki

Yoshinobu Nakashima

Yosiro Komazawa

Yuzi Ganryu

Isao Ikeda

Asao Okuda

Kosuke Haraga

Akifumi Matsukawa

The present invention relates to a bonded assembly characterized in that a board having a convexed portion on a jointing surface thereof and a board having, on a jointing surface thereof, a concaved portion or a through hole to be engaged with the convexed portion are jointed with adhesives. Also, the present invention relates to a bonded assembly characterized in that an adhesive is coated on the portion other than the convexed portion of the board so that the coating thickness is smaller than the height of the convexed portion, and then the board is jointed to another board having a concaved portion or a through hole, after making alignment of the boards. Further, the present invention relates to a rivet having means for fitting to and temporarily fixing to an inserting through hole, and a method of jointing boards which comprises a step for inserting, fitting and temporarily fixing the rivet having the means for temporarily fixing to the inserting through hole on the board. The present invention can provide a highly reliable bonded assembly, a method of jointing boards therefor and a rivet for facilitating jointing the boards, which assure easy and accurate alignment of the boards, secure an adhesive coating thickness required, prevent the adhesive from adhering to unnecessary portions and increase the strength as the bonded assembly.

Bonded assembly, method of jointing for preparation thereof and rivet

A molding material having low moisture permeability for use in the stators of submersible motors. The molding material comprises approximately 20-30 parts by weight of an epoxy resin, approximately 1-3 parts by weight of a curing agent, approximately 0.5-1.5 parts by weight of zinc stearate, approximately 2-3 parts by weight of a mechanical reinforcing agent, approximately 7.5-56.5 parts by weight of quartz powder, and one or more substances selected from anhydrous gypsum and silica gel, with the total amount of said inorganic substance(s) being approximately 55-20 parts by weight, and with the total amount of quartz powder and said inorganic substance(s) being approximately 62.5-76.5 parts by weight. Because of its low moisture permeability, the insulating properties of the molding material can be maintained indefinitely.

Molding material for the stator of a submersible motor

An epoxy resin composition which comprises an epoxy resin derived from an ester of an alkadienealcohol; an epoxy resin prepared by reacting an epichlorohydrin and a bisphenol and an acid anhydride curing agent. The cured product has very high mechanical strength and cracking resistance and is useful as an electrical insulating material.

Epoxy resin composition

Growing community of inventors

Marugame, Japan

Shoji Takagi