Title:
ELECTROVISCOUS FLUID COMPOSITION
Document Type and Number:
Japanese Patent JP3115674
Kind Code:
B2
Abstract:
PURPOSE: To obtain the subject composition which develops high shearing stress and excels in electric current characteristics and long-term stability by adding an inorganic compound soluble in acidic water to a suspension of a crosslinked polymer to coagulate the crosslinked polymer and separating the coagulated polymer from the suspension.
CONSTITUTION: The objective composition comprises an electrical insulating dispersing medium and dispersed phase particles dispersed in this medium comprising a sulfonated polymer obtained by synthesizing a crosslinked polymer by effecting the aqueous suspension polymerization of a monomer mixture essentially consisting of a vinyl aromatic compound and a polyvinyl compound and optionally containing other vinyl compounds and sulfonating the aromatic rings existing in the crosslinked polymer. An inorganic compound soluble in acidic water is added to the suspension of the crosslinked polymer to coagulate the crosslinked polymer, and the crosslinked polymer is separated from the suspension to obtain a crosslinked polymer. This composition can develop, high shearing stress and excels in electric current characteristics and long-term stability.
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Inventors:
Satoshi Ono
Ryuji Aizawa
Yoshinobu Asako
Minoru Kobayashi
Ryuji Aizawa
Yoshinobu Asako
Minoru Kobayashi
Application Number:
JP942592A
Publication Date:
December 11, 2000
Filing Date:
January 22, 1992
Export Citation:
Assignee:
Nippon Shokubai Co., Ltd.
International Classes:
C10M143/10; B01J13/00; C10M151/02; F16D35/00; C10N20/06; C10N30/00; C10N30/04; C10N40/04; C10N40/08; C10N40/14; C10N60/10; C10N70/00; (IPC1-7): C10M143/10; B01J13/00; C10M151/02
Domestic Patent References:
| JP3215597A | ||||
| JP5112608A | ||||
| JP5112790A | ||||
| JP598711A |
Attorney, Agent or Firm:
Mikio Hatta (4 outside)