Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2006-08-24
2008-12-23
Teskin, Fred M (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S161000, C526S281000, C526S283000
Reexamination Certificate
active
07468417
ABSTRACT:
The present invention relates to a method of preparing a copolymer having controlled gel content by polymerizing cyclic olefin compound by ROMP (Ring Opening Metathesis Polymerization), and more precisely, a method of preparing cyclic olefin copolymer with high yield, in which a complex prepared by mixing a W salt compound and an organoaluminum halide compound is used as a catalyst in the presence or absence of a molecular weight regulator, and a method of controlling gel formation by regulating the composition of cyclic olefin monomer composing a copolymer as shown in the following Empirical Formula 1 without using a reaction speed regulator or gel formation inhibitor.(Empirical Formula 1)Norbornene=30˜70 weight %Cyclic olefin compound=70˜30 weight %At this time, the cyclic olefin compound presented in the above Empirical Formula 1 is one or more compounds selected from a group consisting of dicyclopentadiene and compounds represented by the following Formula 1.Wherein, m is an integer of 0-1, R1is C1-C5alkyl and R2is H or C1-C10alkyl.
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Jang Young-chan
Kwag Han Jin
Sung Hyun-Kyung
Korea Kumho Petrochemical Co. Ltd.
Occhiuti Rohlicek & Tsao LLP
Teskin Fred M
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