External additive for toner for electrophotography, toner for electrophotography, double-component developer for electrophotography, image-forming process using the toner, and image-forming apparatus using the toner
An external additive for a toner for electrophotography which contains oxide fine particles which contain silicon, in which the oxide fine particles have a primary particle diameter of 30 nm to 300 nm in number average, a standard deviation sigma of a particle size distribution of the primary partic...
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| creator | ASAHINA YASUO NAKAYAMA SHINYA MOCHIZUKI SATOSHI UMEMURA KAZUHIKO SUGIURA HIDEKI |
| description | An external additive for a toner for electrophotography which contains oxide fine particles which contain silicon, in which the oxide fine particles have a primary particle diameter of 30 nm to 300 nm in number average, a standard deviation sigma of a particle size distribution of the primary particle diameter satisfies a relation of: R/4 |
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UMEMURA KAZUHIKO ; SUGIURA HIDEKI</creator><creatorcontrib>ASAHINA YASUO ; NAKAYAMA SHINYA ; MOCHIZUKI SATOSHI ; UMEMURA KAZUHIKO ; SUGIURA HIDEKI</creatorcontrib><description>An external additive for a toner for electrophotography which contains oxide fine particles which contain silicon, in which the oxide fine particles have a primary particle diameter of 30 nm to 300 nm in number average, a standard deviation sigma of a particle size distribution of the primary particle diameter satisfies a relation of: R/4<=sigma<=R, in which the R expresses the primary particle diameter, the oxide fine particles are substantially spherical having a circularity SF1 defined as equation (1) of 100 to 130 and a circularity SF2 defined as equation (2) of 100 to 125; SF1=(L2/A)x(pi/4)x100 equation (1) SF2=(P2/A)x(1/4pi)x100 equation (2), in the equations, "L" expresses the absolute maximum length of the oxide fine particles; "A" expresses a projected area of the oxide fine particles; and "P" expresses a maximum perimeter of the oxide fine particles.</description><language>eng</language><subject>ADHESIVES ; CHEMISTRY ; CINEMATOGRAPHY ; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F ; COMPOUNDS THEREOF ; DYES ; ELECTROGRAPHY ; ELECTROPHOTOGRAPHY ; HOLOGRAPHY ; INORGANIC CHEMISTRY ; MAGNETOGRAPHY ; METALLURGY ; MISCELLANEOUS APPLICATIONS OF MATERIALS ; MISCELLANEOUS COMPOSITIONS ; NATURAL RESINS ; NON-METALLIC ELEMENTS ; PAINTS ; PHOTOGRAPHY ; PHYSICS ; POLISHES ; PREPARATION OF CARBON BLACK ; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES</subject><creationdate>2009</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20091103&DB=EPODOC&CC=US&NR=7611815B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20091103&DB=EPODOC&CC=US&NR=7611815B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>ASAHINA YASUO</creatorcontrib><creatorcontrib>NAKAYAMA SHINYA</creatorcontrib><creatorcontrib>MOCHIZUKI SATOSHI</creatorcontrib><creatorcontrib>UMEMURA KAZUHIKO</creatorcontrib><creatorcontrib>SUGIURA HIDEKI</creatorcontrib><title>External additive for toner for electrophotography, toner for electrophotography, double-component developer for electrophotography, image-forming process using the toner, and image-forming apparatus using the toner</title><description>An external additive for a toner for electrophotography which contains oxide fine particles which contain silicon, in which the oxide fine particles have a primary particle diameter of 30 nm to 300 nm in number average, a standard deviation sigma of a particle size distribution of the primary particle diameter satisfies a relation of: R/4<=sigma<=R, in which the R expresses the primary particle diameter, the oxide fine particles are substantially spherical having a circularity SF1 defined as equation (1) of 100 to 130 and a circularity SF2 defined as equation (2) of 100 to 125; 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SF1=(L2/A)x(pi/4)x100 equation (1) SF2=(P2/A)x(1/4pi)x100 equation (2), in the equations, "L" expresses the absolute maximum length of the oxide fine particles; "A" expresses a projected area of the oxide fine particles; and "P" expresses a maximum perimeter of the oxide fine particles.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ADHESIVES CHEMISTRY CINEMATOGRAPHY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F COMPOUNDS THEREOF DYES ELECTROGRAPHY ELECTROPHOTOGRAPHY HOLOGRAPHY INORGANIC CHEMISTRY MAGNETOGRAPHY METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-METALLIC ELEMENTS PAINTS PHOTOGRAPHY PHYSICS POLISHES PREPARATION OF CARBON BLACK TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES |
| title | External additive for toner for electrophotography, toner for electrophotography, double-component developer for electrophotography, image-forming process using the toner, and image-forming apparatus using the toner |
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