公开(公告)号：US20230390710A1

公开(公告)日：2023-12-07

申请号：US18034462

申请日：2021-10-29

Applicant: Arkema Inc.

Inventor： Gregory S. O'BRIEN ,  Walter P. KOSAR ,  Saeid ZERAFATI

IPC: B01D71/34 ,  B01D67/00 ,  B01D69/02

CPC classification number: B01D71/34 ,  B01D67/00111 ,  B01D67/0018 ,  B01D67/003 ,  B01D69/02 ,  B01D2323/21 ,  B01D2325/24 ,  B01D2325/20 ,  B01D2323/12 ,  B01D2323/219

Abstract: This invention allows for the production of high strength and high permeability TIPS membranes using extractable fillers with fine powder PVDF grades.

公开(公告)号：US20180056247A1

公开(公告)日：2018-03-01

申请号：US15556063

申请日：2016-03-08

Applicant: Arkema Inc.

Inventor： Walter P. KOSAR

IPC: B01D71/32 ,  B01D67/00 ,  C08L27/16 ,  C08L27/18

CPC classification number: B01D71/32 ,  B01D67/0018 ,  B01D71/34 ,  C08F14/18 ,  C08F14/22 ,  C08F114/22 ,  C08L27/16 ,  C08L27/18

Abstract: The invention relates to polymer powders, preferably fluoropolymer powders such as polyvinylidene fluoride (such as Kynar® resins from Arkema Inc.), polyvinyl fluoride, and poly-ethylene-co-chlorotrifluoroethylene, useful for a high-solids liquid slurry. The PVDF has a narrow average particle size of from 20 to 100 microns, with less than 20 weight percent of particles outside this range. This powder can be used to form slurries having from 30 to 60 weight percent solids, the liquid slurries formed being free-flowing. The free-flowing slurries are useful in forming membranes in a thermally induced phase separation (TIPS) process.