-
公开(公告)号:US12134564B2
公开(公告)日:2024-11-05
申请号:US17291030
申请日:2019-11-06
Applicant: RHODIA OPERATIONS
Inventor: Cyril Chomette , Frédéric Colbeau-Justin , Fabien Stocklouser , Cédric Boivin , Thomas Chaussee
IPC: C01B33/193 , B60C1/00 , C08K3/36 , C08L101/00 , B82Y40/00
Abstract: A precipitated silica having large particle size for use in tire applications. In particular, a precipitated silica characterised by a CTAB surface area SCTAB equal to or greater than 160 m2/g; a median particle size d50, measured by centrifugal sedimentation, such that |d50|>25000/|SCTAB| (I) wherein |d50| represents the numerical value of the median particle size d50 measured by centrifugal sedimentation and expressed in nm and |SCTAB| represents the numerical value of the CTAB surface area SCTAB expressed in m2/g; and
an aluminium content not exceeding 4500 ppm.-
公开(公告)号:US11884551B2
公开(公告)日:2024-01-30
申请号:US16611157
申请日:2018-05-03
Applicant: RHODIA OPERATIONS
Inventor: Emmanuelle Allain Najman , Fabien Stocklouser , Pascaline Garbey , Caroline Fayolle , Sylvaine Neveu , Laurent Guy
IPC: C01B33/193 , B01J21/08 , B01J35/10 , C08K3/36
CPC classification number: C01B33/193 , B01J21/08 , B01J35/1014 , B01J35/1019 , C08K3/36 , C01P2002/54 , C01P2004/51 , C01P2006/12 , C01P2006/16 , C08K2201/005 , C08K2201/006
Abstract: A precipitated silica having a broad particle size distribution and large median particle size as well as its method of manufacture is provided. The precipitated silica has a CTAB surface area SCTAB in the range from 40 to 300 m2/g, a difference between BET surface area SBET and CTAB surface area SCTAB of at least 35 m2/g, a width of the particle size distribution Ld, measured by centrifugal sedimentation, of at least 1.5, an amount of aluminium WA1 in the range from 0.5 to 7.0 wt %, and a median particle size d50, measured by centrifugal sedimentation, such that for a given value of CTAB surface area SCTAB and amount of aluminium WAl, parameter A, defined by the following equation: A=|d50|+0.782×|SCTAB|−8.524×|WAl|.
-
公开(公告)号:US20250026649A1
公开(公告)日:2025-01-23
申请号:US18905025
申请日:2024-10-02
Applicant: RHODIA OPERATIONS
Inventor: Cyril Chomette , Frédéric Colbeau-Justin , Fabien Stocklouser , Cédric Boivin , Thomas Chaussee
IPC: C01B33/193 , B60C1/00 , B82Y40/00 , C08K3/36 , C08L101/00
Abstract: A precipitated silica having large particle size for use in tire applications. In particular, a precipitated silica characterised by a CTAB surface area SCTAB equal to or greater than 160 m2/g; a median particle size d50, measured by centrifugal sedimentation, such that ❘ "\[LeftBracketingBar]" d 50 ❘ "\[LeftBracketingBar]" > 25000 / ❘ "\[LeftBracketingBar]" S C T A B ❘ "\[RightBracketingBar]" ( I ) wherein |d50| represents the numerical value of the median particle size d50 measured by centrifugal sedimentation and expressed in nm and |SCTAB| represents the numerical value of the CTAB surface area SCTAB expressed in m2/g; and an aluminium content not exceeding 4500 ppm.
-
-