Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1989-06-09
1991-08-06
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526243, 526245, 526248, 526250, 526251, 526252, 526253, 526255, 526247, 528 86, 568669, C08F 1416
Patent
active
050379178
ABSTRACT:
A process for preparing a polymer having perfluorocyclobutane rings by the steps of (a) contacting monomers having at least two dimerizable perfluorovinyl groups; and (b) exposing the monomers to sufficient heat and for a sufficient time that a polymer containing perfluorocyclobutane rings is formed. The invention includes polymers having a backbone comprising hydrocarbyl groups, perfluorocyclobutane rings and non-carbon atoms and polymers of at least 10,000 molecular weight having repeating units [O-(CFR.sub.f).sub.n -O-perfluorocyclobutane].
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Babb David A.
Clement Katherine S.
Ezzell Bobby R.
Richey W. Frank
McDonald, Jr. Thomas
Michl Paul R.
The Dow Chemical Company
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