Invention Grant
US07666927B2 Removing fluorosurfactant from aqueous fluoropolymer dispersions using anion exchange polymer with functional groups resistant to degradation to trialkylamines
失效
使用具有对三烷基胺降解抗性的官能团的阴离子交换聚合物从含氟聚合物水分散体中除去含氟表面活性剂
- Patent Title: Removing fluorosurfactant from aqueous fluoropolymer dispersions using anion exchange polymer with functional groups resistant to degradation to trialkylamines
- Patent Title (中): 使用具有对三烷基胺降解抗性的官能团的阴离子交换聚合物从含氟聚合物水分散体中除去含氟表面活性剂
-
Application No.: US11292454Application Date: 2005-12-02
-
Publication No.: US07666927B2Publication Date: 2010-02-23
- Inventor: James R. Combes , David William Johnson , Stephen Thomas Breske
- Applicant: James R. Combes , David William Johnson , Stephen Thomas Breske
- Applicant Address: US DE Wilmington
- Assignee: E.I. du Pont de Nemours and Company
- Current Assignee: E.I. du Pont de Nemours and Company
- Current Assignee Address: US DE Wilmington
- Main IPC: C08L1/00
- IPC: C08L1/00
Abstract:
A process for reducing fluorosurfactant content of a stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion comprising contacting the stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion with an anion exchange resin comprising a polymer and quaternary ammonium functional groups to reduce fluorosurfactant content, the functional groups being resistant to degradation which releases trialkylamines. The anion exchange resin is separated from the dispersion after the fluorosurfactant content has been reduced.
Public/Granted literature
Information query
