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.