Patent · US Expired

VDF polymerization process

US7122608B1 · kind B1 · utility

27Cited by

2References

13Claims

0Family size

Assignee

SOLVAY SOLEXIS S.P.A. · IT

Inventors

Giulio Brinati · Milano, IT
Paolo Lazzari · Cagliari, IT
Vincenzo Arcella · Milano, IT

Key dates

Filing date	Jun 30, 1997
Grant date	Oct 17, 2006
Priority date	—
Expiry date	Jun 30, 2017

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F14/22
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

VDF polymerization process, optionally modified with small amounts of one or more fluoro-containing comonomers, carried out in the presence of a microemulsion comprising a (per) fluoropolyether having neutral end groups, having number average molecular weight between 400 and 3000, and a surfactant based on perfluoropolyethers with salified acid end groups, said surfactant having a number molecular weight Mn comprised between 400–600 and having a distribution of molecular weights such that fractions having a number average molecular weight higher than 700 are not present, or are in amount less than 5% by weight.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.