Silica fine powder and use thereof
Provided is an external additive for toner, which is suitable for producing a toner having excellent storage stability and chargeability. A silica fine powder suitable for being added to the external additive for toner is also provided. The silica fine powder has a specific surface area of 15 m2/g o...
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| creator | Nitta, Junya Sasaki, Shuji Mizumoto, Takahisa |
| description | Provided is an external additive for toner, which is suitable for producing a toner having excellent storage stability and chargeability. A silica fine powder suitable for being added to the external additive for toner is also provided. The silica fine powder has a specific surface area of 15 m2/g or more and 90 m2/g or less, a loose bulk density of 0.09 g/cm3 or more and 0.18 g/cm3 or less, a carbon content of 0.25 wt % or more and 0.90 wt % or less, and a hydrophobicity of 60% or more and 75% or less. It is preferable that a ratio (A)/(B) of the loose bulk density of the silica fine powder after surface treatment (A) to a loose bulk density of the silica fine powder before the surface treatment (B) be 1.05 or more and 1.60 or less. |
| format | Patent |
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A silica fine powder suitable for being added to the external additive for toner is also provided. The silica fine powder has a specific surface area of 15 m2/g or more and 90 m2/g or less, a loose bulk density of 0.09 g/cm3 or more and 0.18 g/cm3 or less, a carbon content of 0.25 wt % or more and 0.90 wt % or less, and a hydrophobicity of 60% or more and 75% or less. It is preferable that a ratio (A)/(B) of the loose bulk density of the silica fine powder after surface treatment (A) to a loose bulk density of the silica fine powder before the surface treatment (B) be 1.05 or more and 1.60 or less.</description><language>eng</language><subject>ADHESIVES ; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY ; CHEMISTRY ; CINEMATOGRAPHY ; COMPOUNDS THEREOF ; DYES ; ELECTROGRAPHY ; ELECTROPHOTOGRAPHY ; HOLOGRAPHY ; INORGANIC CHEMISTRY ; MAGNETOGRAPHY ; METALLURGY ; MISCELLANEOUS APPLICATIONS OF MATERIALS ; MISCELLANEOUS COMPOSITIONS ; NATURAL RESINS ; NON-METALLIC ELEMENTS ; PAINTS ; PERFORMING OPERATIONS ; PHOTOGRAPHY ; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ; PHYSICS ; POLISHES ; PREPARATION OF CARBON BLACK ; THEIR RELEVANT APPARATUS ; TRANSPORTING ; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES</subject><creationdate>2019</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=20190416&DB=EPODOC&CC=US&NR=10259944B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20190416&DB=EPODOC&CC=US&NR=10259944B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Nitta, Junya</creatorcontrib><creatorcontrib>Sasaki, Shuji</creatorcontrib><creatorcontrib>Mizumoto, Takahisa</creatorcontrib><title>Silica fine powder and use thereof</title><description>Provided is an external additive for toner, which is suitable for producing a toner having excellent storage stability and chargeability. 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It is preferable that a ratio (A)/(B) of the loose bulk density of the silica fine powder after surface treatment (A) to a loose bulk density of the silica fine powder before the surface treatment (B) be 1.05 or more and 1.60 or less.</description><subject>ADHESIVES</subject><subject>CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY</subject><subject>CHEMISTRY</subject><subject>CINEMATOGRAPHY</subject><subject>COMPOUNDS THEREOF</subject><subject>DYES</subject><subject>ELECTROGRAPHY</subject><subject>ELECTROPHOTOGRAPHY</subject><subject>HOLOGRAPHY</subject><subject>INORGANIC CHEMISTRY</subject><subject>MAGNETOGRAPHY</subject><subject>METALLURGY</subject><subject>MISCELLANEOUS APPLICATIONS OF MATERIALS</subject><subject>MISCELLANEOUS COMPOSITIONS</subject><subject>NATURAL RESINS</subject><subject>NON-METALLIC ELEMENTS</subject><subject>PAINTS</subject><subject>PERFORMING OPERATIONS</subject><subject>PHOTOGRAPHY</subject><subject>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</subject><subject>PHYSICS</subject><subject>POLISHES</subject><subject>PREPARATION OF CARBON BLACK</subject><subject>THEIR RELEVANT APPARATUS</subject><subject>TRANSPORTING</subject><subject>TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2019</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZFAKzszJTE5USMvMS1UoyC9PSS1SSMxLUSgtTlUoyUgtSs1P42FgTUvMKU7lhdLcDIpuriHOHrqpBfnxqcUFicmpeakl8aHBhgZGppaWJiZORsbEqAEAi_wl1g</recordid><startdate>20190416</startdate><enddate>20190416</enddate><creator>Nitta, Junya</creator><creator>Sasaki, Shuji</creator><creator>Mizumoto, Takahisa</creator><scope>EVB</scope></search><sort><creationdate>20190416</creationdate><title>Silica fine powder and use thereof</title><author>Nitta, Junya ; Sasaki, Shuji ; Mizumoto, Takahisa</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US10259944B23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2019</creationdate><topic>ADHESIVES</topic><topic>CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY</topic><topic>CHEMISTRY</topic><topic>CINEMATOGRAPHY</topic><topic>COMPOUNDS THEREOF</topic><topic>DYES</topic><topic>ELECTROGRAPHY</topic><topic>ELECTROPHOTOGRAPHY</topic><topic>HOLOGRAPHY</topic><topic>INORGANIC CHEMISTRY</topic><topic>MAGNETOGRAPHY</topic><topic>METALLURGY</topic><topic>MISCELLANEOUS APPLICATIONS OF MATERIALS</topic><topic>MISCELLANEOUS COMPOSITIONS</topic><topic>NATURAL RESINS</topic><topic>NON-METALLIC ELEMENTS</topic><topic>PAINTS</topic><topic>PERFORMING OPERATIONS</topic><topic>PHOTOGRAPHY</topic><topic>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</topic><topic>PHYSICS</topic><topic>POLISHES</topic><topic>PREPARATION OF CARBON BLACK</topic><topic>THEIR RELEVANT APPARATUS</topic><topic>TRANSPORTING</topic><topic>TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES</topic><toplevel>online_resources</toplevel><creatorcontrib>Nitta, Junya</creatorcontrib><creatorcontrib>Sasaki, Shuji</creatorcontrib><creatorcontrib>Mizumoto, Takahisa</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Nitta, Junya</au><au>Sasaki, Shuji</au><au>Mizumoto, Takahisa</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Silica fine powder and use thereof</title><date>2019-04-16</date><risdate>2019</risdate><abstract>Provided is an external additive for toner, which is suitable for producing a toner having excellent storage stability and chargeability. A silica fine powder suitable for being added to the external additive for toner is also provided. The silica fine powder has a specific surface area of 15 m2/g or more and 90 m2/g or less, a loose bulk density of 0.09 g/cm3 or more and 0.18 g/cm3 or less, a carbon content of 0.25 wt % or more and 0.90 wt % or less, and a hydrophobicity of 60% or more and 75% or less. It is preferable that a ratio (A)/(B) of the loose bulk density of the silica fine powder after surface treatment (A) to a loose bulk density of the silica fine powder before the surface treatment (B) be 1.05 or more and 1.60 or less.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ADHESIVES CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY CINEMATOGRAPHY COMPOUNDS THEREOF DYES ELECTROGRAPHY ELECTROPHOTOGRAPHY HOLOGRAPHY INORGANIC CHEMISTRY MAGNETOGRAPHY METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-METALLIC ELEMENTS PAINTS PERFORMING OPERATIONS PHOTOGRAPHY PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PHYSICS POLISHES PREPARATION OF CARBON BLACK THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES |
| title | Silica fine powder and use thereof |
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