Daiso Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Osaka Soda Co., Ltd.

Toshiyuki Funayama

Toyofumi Otaka

Shigeru Shoji

Yasushi Hamura

Mitsuhiro Tani

Kazuya Tsujimura

Kazunori Yokoyama

Mitsuru Kaitou

Kozo Misumi

Masahide Onishi

Yoshio Nakamura

Taro Ozaki

Motoki Kitagawa

Koshiro Hamaguchi

Tadahiro Ono

Tsuyoshi Imaoka

Tomonori Harada

In an active noise reduction device, in order to solve this problem, a control block determines a level of a reference signal detected by a level detection unit. If determining that the level of the reference signal is small, the control block decreases a level of a cancel signal. This operation suppresses generation of an abnormal sound even if a level of a noise is small.

Active noise reduction device, instrument using same, and active noise reduction method

An active noise reduction device is used with a secondary noise source that generates a secondary noise and an error signal source that outputs an error signal corresponding to a residual sound caused by interference between the secondary noise and a noise. A &#x3bc;-adjustment unit calculates a step-size parameter for updating a filter coefficient of an adaptive filter by multiplying a standard step-size parameter by a ratio of a standard representative input value corresponding to amplitude of a signal to a representative input value corresponding to the amplitude of the signal.

Active noise reduction device and active noise reduction method

A composition for sportswear, includes a rubber component (a) which contains an epihalohydrin rubber, a vulcanizing agent (b) in an amount of 0.1 to 10 parts by weight for 100 parts by weight of the rubber component (a), and a foaming agent (c) in an amount of 0.5 to 20 parts by weight therefor. The composition for sportswear is preferably includes a colorant (d).

Composition for sportswear and foam thereof

The present invention provides a vulcanized rubber material having improved heat resistance while maintaining ozone resistance of an epihalohydrin rubber, and a rubber composition for vulcanization for producing the same. The invention further provides a vulcanized rubber material and a rubber composition for vulcanization, that can achieve the above objects without using an organonickel compound having a concern about toxicity, or if used, using the same as less as possible. The present invention relates to a rubber composition for vulcanization comprising (a) 100 parts by weight of an epihalohydrin rubber, (b) 0.01 to 0.5 part by weight of a copper salt of dithiocarbamic acid, (c) an acid acceptor, and (d) a polythiol type vulcanizing agent or a polyol type vulcanizing agent, a vulcanized rubber material obtained by vulcanizing the composition, and an automotive rubber part comprising the vulcanized rubber material.

Rubber composition for vulcanization

Disclosed is a vulcanized rubber laminate in which both an unvulcanized epichlorohydrin-based rubber composition layer containing a specific polyfunctional (meth)acrylate compound and a specific vulcanizing agent and an unvulcanized fluororubber composition layer containing a specific vulcanizing agent are heated and bonded, whereby, both rubber layers are firmly bonded. A vulcanized rubber laminate in which (A) an unvulcanized epichlorohydrin-based rubber composition layer and (B) an unvulcanized fluororubber composition layer are heated and bonded, wherein the unvulcanized epichlorohydrin-based rubber composition (A) contains: (1) a polyfunctional (meth)acrylate compound having two or more (meth) acryloyl groups in the molecule, and (2) at least one kind selected from the group consisting of a triazine-based vulcanizing agent, a thiourea-based vulcanizing agent, a quinoxaline-based vulcanizing agent and a bisphenol-based vulcanizing agent, and the unvulcanized fluororubber composition (B) contains an organic peroxide-based vulcanizing agent.

Vulcanized rubber laminate

The invention provides a vulcanized rubber laminate obtained by firmly bonding an unvulcanized epichlorohydrin rubber layer and an organic peroxide-containing fluororubber layer. The laminate is obtained by thermal adhesion a layer of an unvulcanized epichlorohydrin rubber composition to a layer of an unvulcanized fluororubber composition. The epichlorohydrin rubber composition comprises 1) an unvulcanized epichlorohydrin rubber containing 3 to 15 mol % of allyl glycidyl ether unit, 2) quinoxaline-based vulcanizing agents, mercaptotriazine-based vulcanizing agents or bisphenol-based vulcanizing agents, and 3) 1,8-diazabicyclo(5,4,0)undecene-7 salts, 1,5-diazabicyclo(4,3,0)nonene-5 salts, quaternary ammonium salts, quaternary phosphonium salts, basic white carbons or an alkaline metal salt of higher fatty acid the fluororubber composition comprises an fluororubber and an organic peroxide-based vulcanizing agent.

A composition for epihalohydrin vulcanized rubber excellent in heat resistance while keeping good vulcanization rate and store stability, comprising (a) an epihalohydrin robber, (b) a metal soap, (c) an acid acceptor, and (d) a vulcanizing agent, the composition further preferably containing (e) a fatty acid for suppressing vulcanization, or preferably containing (f) an alcohol for accelerating vulcanization.

Composition for vulcanized rubber and vulcanization product

An active noise controller can determine the signal transmission characteristics from the power amplifier and the speaker to the microphone without using any special external measuring instrument and calculate a cosine correction value and a sine correction value without using an external computer. The active noise controller uses the cosine correction value and the sine correction value to actively reduce vibrational noise. The measurement mode is selected on touch panel (), and correction value calculator () calculates cosine correction value Cand sine correction value Cby using filter coefficients Wand Wwhich allow error signal e'(n) to approach zero. Memory () stores these values Cand C

Active noise controller

The present invention provides a chlorine-containing polymer vulcanizing composition with improved preservation stability. The present invention is a chlorine-containing polymer vulcanizing composition obtained by blending (a) a zeolite compound, (b) a vulcanizing agent, and (c) an optional organic vulcanization accelerator. The zeolite compound can be natural zeolite, an A-type, X-type, or Y-type synthetic zeolite, a sodalite, natural or synthetic mordenite, ZSM-5, or a metal substitution product thereof. The zeolite compound is preferably an activated zeolite compound. With respect to 100 parts by weight of chlorinated polyethylene, (a) preferably 0.5 to 30 parts by weight, more preferably 5 to 25 parts by weight, of the zeolite compound, (b) preferably 0.1 to 5 parts by weight, more preferably 0.5 to 3 parts by weight, of the vulcanizing agent, and (c) preferably 0.5 to 3 mol, more preferably 0.7 to 1.5 mol, of the vulcanization accelerator with respect to 1 mol of (b) the vulcanizing agent are blended.

Growing community of inventors

Osaka, Japan

Toshiyuki Funayama