Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2006-10-17
2006-10-17
Lipman, Bernard (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S247000, C526S255000
Reexamination Certificate
active
07122608
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.
REFERENCES:
patent: 4864006 (1989-09-01), Giannetti et al.
patent: 5498680 (1996-03-01), Abusleme et al.
patent: 0625526 (1994-11-01), None
Arcella Vincenzo
Brinati Giulio
Lazzari Paolo
Arent & Fox PLLC
Lipman Bernard
Solvay Solexis S.p.A.
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