	US 11,958,980 B2
	Precipitated silica and process for its manufacture
Emmanuelle Allain Najman, L'Hay les Roses (FR); Pascaline Garbey, Saint-Cyr-au-Mont-d'Or (FR); Cédric Feral-Martin, Emerainville (FR); Laure Bertry, Aubervilliers (FR); Laurent Guy, Sathonay-Camp (FR); Thomas Chaussee, Cailloux-sur-Fontaines (FR); and Stéphanie Croyeau, Beaumont sur Oise (FR)
Assigned to RHODIA OPERATIONS, Aubervilliers (FR)
Appl. No. 16/772,146
Filed by RHODIA OPERATIONS, Aubervilliers (FR)
PCT Filed Dec. 20, 2018, PCT No. PCT/EP2018/086056 § 371(c)(1), (2) Date Jun. 11, 2020, PCT Pub. No. WO2019/129607, PCT Pub. Date Jul. 4, 2019.
Claims priority of application No. 17306937 (EP), filed on Dec. 27, 2017; and application No. 18305450 (EP), filed on Apr. 12, 2018.
Prior Publication US 2020/0392347 A1, Dec. 17, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. C09C 1/30 (2006.01); C08K 3/36 (2006.01); C08K 9/04 (2006.01)

CPC C09C 1/3063 (2013.01) [C08K 3/36 (2013.01); C08K 9/04 (2013.01); C01P 2006/12 (2013.01); C08K 2201/006 (2013.01)]

21 Claims

1. A precipitated silica comprising alkyl moieties chemically bound to at least a portion of the Si atoms in the silica structure, characterised in that the resonance assigned to the methyl groups in said alkyl moieties in the ¹³C NMR spectrum of the precipitated silica is between −2.5 and −4.5 ppm.