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Title:
MAGNESIUM OXIDE POWDER, VULCANIZER COMPOSITION FOR RUBBER, RUBBER COMPOSITION, METHOD FOR PRODUCING MAGNESIUM OXIDE POWDER
Document Type and Number:
WIPO Patent Application WO/2023/047990
Kind Code:
A1
Abstract:
In the magnesium oxide powder, D50 at which the cumulative value by a volume-based under-the-sieve cumulative particle size distribution curve becomes 50% is 10 μm or less, the ratio D90/D10 of the particle size D90 at which the cumulative value becomes 90% to the particle size D10 at which the cumulative value by a volume-based under-the-sieve cumulative particle size distribution curve becomes 10% is 10 or less, and the citric acid activity is in a range from 500 seconds to 2500 seconds.

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Inventors:
NAKAGAWA MASAMICHI (JP)
FUJIKAWA ISAMU (JP)
HAMAOKA TAKASHI (JP)
HIMOTO TAKESHI (JP)
YAMAGUCHI SEIJI (JP)
WATANABE KUNIO (JP)
Application Number:
PCT/JP2022/033919
Publication Date:
March 30, 2023
Filing Date:
September 09, 2022
Export Citation:
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Assignee:
UBE MAT IND LTD (JP)
International Classes:
C01F5/08; C08K3/22; C08L21/00
Domestic Patent References:
WO2011007638A12011-01-20
WO2011040593A12011-04-07
WO2012043564A12012-04-05
WO2009038207A12009-03-26
Foreign References:
KR101639653B12016-07-14
US4443425A1984-04-17
JP2021157106A2021-10-07
JP2019044137A2019-03-22
JP2015052031A2015-03-19
Other References:
LI XUE; ZHANG YING; ZHANG YAN; JIN ZE; CHANG PENG; LIU YUNYI: "Preparation of active magnesium oxide with caustic calcined magnesia by ammonia circulation method", ADVANCED POWDER TECHNOLOGY, ELSEVIER BV, NL, vol. 27, no. 4, 30 March 2016 (2016-03-30), NL , pages 1109 - 1114, XP029667169, ISSN: 0921-8831, DOI: 10.1016/j.apt.2016.03.020
Attorney, Agent or Firm:
TAZAKI Akira et al. (JP)
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