ELECTRO-RHEOLOGICAL FLUID AND CYLINDER DEVICE

Title:

ELECTRO-RHEOLOGICAL FLUID AND CYLINDER DEVICE

Document Type and Number:

WIPO Patent Application WO/2021/246099

Kind Code:

A1

Abstract:

Provided are an electro-rheological fluid that exhibits an excellent ER effect and that has sufficient durability, and a cylinder device.　An electro-rheological fluid (300) according the present invention is characterized by comprising a fluid (30) and polyurethane particles (31) containing metal ions, wherein the polyurethane particles (31) have phase-separated structure with a hard segment and a soft segment and contain an additive that increases urethane bonds which form the hard segment.

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Inventors:

ISHII SATOSHI (JP)
TAKAHASHI HITOMI (JP)

Application Number:

PCT/JP2021/017373

Publication Date:

December 09, 2021

Filing Date:

May 06, 2021

Export Citation:

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Assignee:

HITACHI ASTEMO LTD (JP)

International Classes:

C08G18/00; C08G18/08; C08G18/65; C08K3/00; C08K3/08; C08L75/04; C10M149/14; F16F9/46; F16F9/53; C10N30/00; C10N30/08; C10N40/06; C10N40/14

Domestic Patent References:

WO2019035330A1

2019-02-21

Foreign References:

CN101007978A	2007-08-01
JPH0873877A	1996-03-19
JPH08245974A	1996-09-24

Other References:

UEMURA, TAKASHI; HIROSHI KIMURA, KEIJI MINAGAWA; KIYOHITO KOYAMA: "Rheological property of ERF with urethane polymer", DYNAMICS AND DESIGN CONFERENCE '94; SYMPOSIUM ON INTELLIGENT MATERIALS AND SMART STRUCTURES; JULY 12-13, 1994, 1 January 1994 (1994-01-01) - 13 July 1994 (1994-07-13), JP, pages 59 - 60, XP009533029
SCHNEIDER S; EIBL S: "Review of the electrorheological (ER) effect of polyurethane-based ER fluids", APPLIED RHEOLOGY., KERSCHENSTEINER VERLAG, LAPPERSDORF., DE, vol. 18, no. 2, 1 January 2008 (2008-01-01), DE , pages 23956 - 23956-8, XP009142175, ISSN: 1430-6395

Attorney, Agent or Firm:

POLAIRE I.P.C. (JP)

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