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1. (WO2015121332) NOVEL METHOD OF PREPARING PRECIPITATED SILICAS, NOVEL PRECIPITATED SILICAS, AND THEIR USES, IN PARTICULAR FOR REINFORCING POLYMERS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2015/121332    International Application No.:    PCT/EP2015/052920
Publication Date: 20.08.2015 International Filing Date: 12.02.2015
IPC:
C01B 33/193 (2006.01), B29D 30/00 (2006.01), C08K 3/36 (2006.01)
Applicants: RHODIA OPERATIONS [FR/FR]; 25 rue de Clichy F-75009 Paris (FR)
Inventors: BOIVIN, Cédric; (FR).
GUY, Laurent; (FR).
PERIN, Eric; (FR).
LAMIRI, Kilani; (FR)
Agent: FERRI, Isabella; (IT)
Priority Data:
1400414 14.02.2014 FR
Title (EN) NOVEL METHOD OF PREPARING PRECIPITATED SILICAS, NOVEL PRECIPITATED SILICAS, AND THEIR USES, IN PARTICULAR FOR REINFORCING POLYMERS
(FR) NOUVEAU PROCEDE DE PREPARATION DE SILICES PRECIPITEES, NOUVELLES SILICES PRECIPITEES ET LEURS UTILISATIONS, NOTAMMENT POUR LE RENFORCEMENT DE POLYMERES
Abstract: front page image
(EN)The invention relates to a novel method of preparing a precipitated silica, wherein: a silicate is made to react with an acidifying agent, so as to obtain a precipitated silica suspension; the precipitated silica suspension is filtered so as to obtain a filter cake; the filter cake is subjected to a disintegration operation involving the addition of at least one aluminium compound; and the disintegration operation is followed by a drying step. The invention is characterized in that, during or after the disintegration operation, at least one polycarboxylic acid is added to the filter cake. The invention also concerns novel precipitated silicas and their uses.
(FR)L'invention concerne un nouveau procédé de préparation d'une silice précipitée, dans lequel : - on fait réagir un silicate avec un agent acidifiant, de manière à obtenir une suspension de silice précipitée, - on filtre ladite suspension de silice précipitée, de manière à obtenir un gâteau de filtration, - on soumet ledit gâteau de filtration à une opération de délitage comprenant l'addition d'au moins un composé de l'aluminium, - après l'opération de délitage, on procède à une étape de séchage, caractérisé en ce qu'on ajoute au gâteau de filtration, au cours de ou après l'opération de délitage, au moins un acide polycarboxylique. Elle est également relative à de nouvelles silices précipitées et à leurs utilisations.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG).
Publication Language: French (FR)
Filing Language: French (FR)