Method for producing an aqueous dispersion

The method addresses the low particle count and environmental concerns of existing fluorine-containing polymer dispersions by polymerizing tetrafluoroethylene and hexafluoropropylene with compound (X) and a polymerization initiator, achieving a high particle count and efficient polymerization without fluorine-containing emulsifiers.

JP7868772B2Active Publication Date: 2026-06-02AGC INC
View PDF 7 Cites 0 Cited by

Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
AGC INC
Filing Date
2025-06-11
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing methods for producing fluorine-containing polymer aqueous dispersions result in a low number of particles and require the use of emulsifiers with fluorine atoms, which is undesirable from an environmental perspective.

Method used

A method involving the polymerization of tetrafluoroethylene and hexafluoropropylene in the presence of a compound represented by formula (X) and a polymerization initiator, without substantial use of emulsifiers with fluorine atoms, to produce a first aqueous dispersion, followed by polymerizing a second monomer to form a second fluorine-containing polymer, thereby increasing the number of particles.

Benefits of technology

This method produces an aqueous dispersion with a high number of fluorine-containing polymer particles, enhancing dispersibility and polymerization rate without using emulsifiers with fluorine atoms, thus reducing environmental impact.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 0007868772000001
    Figure 0007868772000001
  • Figure 0007868772000002
    Figure 0007868772000002
  • Figure 0007868772000003
    Figure 0007868772000003
Patent Text Reader

Abstract

A method for producing an aqueous dispersion, wherein a first monomer, which includes at least one selected from the group consisting of tetrafluoroethylene and hexafluoropropylene, is polymerized in the presence of a compound represented by formula (X) and a polymerization initiator under conditions in which an aqueous medium is present and an emulsifier having a fluorine atom is substantially absent, to produce a first aqueous dispersion containing particles of a first fluorine-containing polymer, and a second monomer including tetrafluoroethylene is polymerized in the first aqueous dispersion to produce a second aqueous dispersion containing particles of a second fluorine-containing polymer different from the first fluorine-containing polymer.　(X): C(X1)(X2)=C(X3)CONH-R-Z
Need to check novelty before this filing date? Find Prior Art