Title translation:NOUVEAU PROCEDE DE PREPARATION DE SILICE PRECIPITEES,NOUVELLES SILICES PRECIPITEES ET LEURS UTILISATIONS,NOTAMMENT POUR LE RENFORCEMENT DE POLYMERES
Abstract:
The invention concerns a novel method for preparing a precipitated silica, wherein: a silicate is reacted with an acidifying agent so as to obtain a precipitated silica suspension; the precipitated silica suspension is filtered in order to obtain a filter cake; the filter cake is subjected to a disintegration operation involving the addition of an aluminium compound; following the disintegration operation, a drying step is carried out. The invention is characterized in that a polycarboxylic acid selected from among dicarboxylic and tricarboxylic acids is added to the filter cake after the addition of the aluminium compound. The invention also concerns novel precipitated silicas and their uses.
Abstract:
The invention relates to a process for the preparation of a novel precipitated silica, wherein: a silicate is reacted with an acidifying agent, so as to obtain a silica suspension; said silica suspension is filtered, so as to obtain a filter cake; said filter cake is subjected to a liquefaction operation, optionally in the presence of an aluminum compound; wherein at least one polycarboxylic acid is added to the filter cake, during or after the liquefaction operation. It also relates to a novel precipitated silica and to its uses.
Abstract:
The invention relates to a process for the preparation of a novel precipitated silica, wherein: a silicate is reacted with an acidifying agent, so as to obtain a silica suspension; said silica suspension is filtered, so as to obtain a filter cake; said filter cake is subjected to a liquefaction operation optionally in the presence of an alunniniunn compound; wherein 2-methylglutaric acid is added to the filter cake, during or after the liquefaction operation. It also relates to a novel precipitated silica and to its uses.
Abstract:
Precipitated silica having a BET specific surface area in the range of from 35-700 m2/g, a CTAB specific surface area in the range of from 30 to 400 m2/g, and a content of polycarboxylic acid and/or carboxylate groups, expressed as total carbon content, of at least 0.15 wt %
Abstract:
Precipitated silica having a BET specific surface area in the range of from 35-700 m2/g, a CTAB specific surface area in the range of from 30 to 400 m2/g, and a content of polycarboxylic acid and/or carboxylate groups, expressed as total carbon content, of at least 0.15 wt %
Abstract:
The invention relates to a novel method for preparing precipitated silica wherein: a silicate is reacted with an acidifying agent such as to obtain a precipitated silica suspension; said precipitated silica suspension is filtered such as to obtain a filter cake; said filter cake is subjected to a disintegrating operation; after the disintegration operation, a drying step occurs, characterized in that at least one polycarboxylic acid is added to the filter cake during or after the disintegration operation. The invention also relates to novel precipitated silicas and to the uses thereof.
Abstract:
The invention relates to the joint use, in an elastomer composition comprising an isoprenic elastomer, of a precipitated silica containing aluminium, as a reinforcing inorganic filler, the aluminium content of said precipitated silica being higher than 0.5 wt. %, and 3-acryloxy-propyltriethoxysilane as an inorganic filler - elastomer coupling agent. The invention also relates to the elastomer compositions obtained and the items produced from said compositions.