PRECIPITATED SILICAS FOR STORAGE-STABLE RTV-1 SILICONE RUBBER FORMULATIONS WITHOUT STABILIZER

A precipitated silica having an SiOHisolated absorbance ratio of greater than or equal to 1.5, a silanol group density of 1 to 3.0 SiOH/nm2, a modified tapped density of 1 to 50 g/l, and a pH of 3-5, when measured as a aqueous suspension of 5.00 g of the precipitated silica in 100 ml. of deionized w...

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Hauptverfasser: KEMPF, MICHAEL, EL MOUSSAOUI, AZIZ, SCHOLZ, MARIO, ALLERDISSE, RENE, KUHN, DIETER, RUF, MARKUS, PANZ, CHRISTIAN, OBLADEN, HELGA, MEIER, KARL
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:A precipitated silica having an SiOHisolated absorbance ratio of greater than or equal to 1.5, a silanol group density of 1 to 3.0 SiOH/nm2, a modified tapped density of 1 to 50 g/l, and a pH of 3-5, when measured as a aqueous suspension of 5.00 g of the precipitated silica in 100 ml. of deionized water allows preparation of storage-stable RTV-1 silicone rubber formulations without stabilizer. A process for preparing the precipitated silica and its use in thickening sealants is provided.