公开(公告)号：US20230062574A1

公开(公告)日：2023-03-02

申请号：US17792471

申请日：2021-01-07

Applicant: EVONIK OPERATIONS GMBH

Inventor： Frank MENZEL ,  Björn LAZAR ,  Bettina GERHARZ-KALTE ,  Alexander LYGIN ,  Mareike GIESSELER ,  Rainer GOLCHERT ,  Nina MÜHLIG ,  Wolfgang AUL ,  Tobias RENGER

IPC: C09C1/30 ,  C09C3/12

Abstract: Fumed silica powder, surface treated with a surface treatment agent selected from the group consisting of organosilanes, silazanes, acyclic polysiloxanes, cyclic polysiloxanes, and mixtures thereof, wherein the powder has: a) a number of silanol groups relative to BET surface area dSiOH of at least 0.85 SiOH/nm2, as determined by reaction with lithium aluminium hydride; b) a methanol wettability of more than 40% by volume of methanol in methanol-water mixture; c) a tamped density of not more than 200 g/L.