公开(公告)号：US11498848B2

公开(公告)日：2022-11-15

申请号：US16604787

申请日：2018-04-12

Applicant: IMERTECH SAS

Inventor： Gilles Méli ,  Anaïs Berjeaud ,  Alexandra Jakob

IPC: C09C1/02 ,  C01F11/06 ,  C08K3/26 ,  C08K7/24 ,  B82Y30/00 ,  B82Y40/00 ,  F01N3/08

Abstract: Use of a porous precipitated calcium carbonate (PCC) to retain volatile organic compounds (VOCs), a method of reducing emission of VOCs from a composition, the method comprising adding a porous PCC to the composition, said compositions such as polymer compositions and methods of making said compositions.

公开(公告)号：US11872294B2

公开(公告)日：2024-01-16

申请号：US15733214

申请日：2018-12-07

Applicant: IMERTECH SAS

Inventor： Alexandra Jakob

IPC: C09D7/62 ,  A61K6/76 ,  A61K6/60 ,  A61K8/19 ,  A61K8/25 ,  A61K8/365 ,  B01J20/04 ,  B01J20/10 ,  C01B33/193 ,  D21H17/68 ,  D21H17/00 ,  D21H17/67 ,  A61K8/02 ,  C09D7/40 ,  A61K6/17 ,  A61K8/11 ,  A61Q19/00 ,  B01J20/28 ,  C09C1/02 ,  C09D13/00

CPC classification number: A61K8/0241 ,  A61K6/17 ,  A61K6/60 ,  A61K6/76 ,  A61K8/11 ,  A61K8/19 ,  A61K8/25 ,  A61K8/365 ,  A61Q19/00 ,  B01J20/043 ,  B01J20/103 ,  B01J20/28021 ,  B01J20/28059 ,  B01J20/28061 ,  B01J20/28083 ,  C01B33/193 ,  C09C1/024 ,  C09D7/62 ,  C09D7/70 ,  C09D13/00 ,  D21H17/67 ,  D21H17/675 ,  D21H17/68 ,  D21H17/73 ,  A61K2800/621 ,  A61K2800/651 ,  C01P2002/85 ,  C01P2004/03 ,  C01P2004/34 ,  C01P2004/80 ,  C01P2006/12 ,  C01P2006/16

Abstract: This disclosure describes a process for preparing silica-coated calcium carbonate particles, involving the steps of preparing an aqueous carbonate slurry containing calcium carbonate particles, adding at least one silicate composition to the aqueous carbonate slurry to obtain a carbonate-silicate slurry, lowering a pH of the carbonate-silicate slurry by adding at least one acidic compound to obtain a pH-adjusted slurry containing the silica-coated calcium carbonate particles, and isolating the silica-coated calcium carbonate particles—in which at the adding of the acidic compound is controlled such that a final pH of the pH-adjusted slurry ranges from about 7 to about 10, and the silica-coated calcium carbonate particles include a porous coating having an average pore diameter ranging from 2 nm to 50 nm. This disclosure also describes articles and compositions containing the silica-coated calcium carbonate particles, as well as hollow silica spheres formed from the silica-coated calcium carbonate particles.