The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 19, 2024
Filed:
Nov. 06, 2019
Rhodia Operations, Aubervilliers, FR;
Frédéric Colbeau-Justin, Collonges au Mont d'Or, FR;
Emmanuelle Allain Najman, L'Hay les Roses, FR;
Pascaline Lauriol-Garbey, Saint-Cyr-au-Mont-d'Or, FR;
RHODIA OPERATIONS, Lyons, FR;
Abstract
Precipitated silica having large median particle size for use as reinforcing filler in elastomeric compositions as well as its method of manufacture. In particular, a precipitated silica characterised by a CTAB surface area Sin the range from 70 to 350 m/g; an amount Wof at least one metal M selected from elements of groups 3, 4 and 5 of at least 0.1 mol %; and a median particle size d50, measured by centrifugal sedimentation, such that: |d50|≥183×|R|×|W|−0.67×|S|+233 (I) wherein |d50| represents the numerical value of median particle size d50 measured by centrifugal sedimentation and expressed in nm; |R|, the numerical value of the ionic radius of metal M expressed in nm; |S|, the numerical value of the CTAB surface area Sexpressed in m/g; and |W|, the numerical value of the percentage molar amount of the metal W.