Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1995-03-16
1996-04-23
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526249, C08F 238
Patent
active
055104355
ABSTRACT:
Cyclopentanes alkyl-substituted with one or more C.sub.1 -C.sub.6 alkyls are used as chain transfer agents in (co)polymerization reactions carried out, either in suspension or in aqueous emulsion, at low temperatures, comprised between -30.degree. and +30.degree. C., for preparing thermoplastic hydrogen-containing fluoropolymers , such as for instance ethylene/chlorotrifluoroethylene and ethylene/tetrafluoroethylene copolymers, or homopolymers and copolymers of vinylidenefluoride. They are transfer agents having high efficiency, which are liquid and thus can be easily handled and dosed, non-toxic, yielding alkyl end groups of high thermal stability.
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Copending U.S. application Ser. No. 08/405,811, filed Mar. 16, 1995, Abusleme et al--"(Co) Polymerization Process in Suspension for Preparing Hydrogen Containing Thermoplastic Fluoropolymers".
Copending U.S. application Ser. No. 08/332,748, Abusleme et al (filing date and title unknown.
Abusleme Julio A.
Kirsch Sheldon J.
Ausimont S.p.A.
Sarofin N.
Schofer Joseph L.
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