Method for preparing cyclic olefin polymer having high bulk...

Details Method for preparing cyclic olefin polymer having high bulk... Method for preparing cyclic olefin polymer having high bulk...

2007-04-10

2007-04-10

Harlan, Robert D. (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S281000

Reexamination Certificate

active

11050833

ABSTRACT:
A method for preparing a cyclic olefin polymer is described. The method includes polymerizing cyclic olefin monomers or a cyclic olefin monomer with ethylene to prepare a cyclic olefin polymer solution; slowly adding a non-solvent drop wise to the cyclic olefin polymer solution to precipitate a cyclic olefin polymer; and filtering and drying the precipitated cyclic olefin polymer. In addition, the cyclic olefin polymer prepared using this method is described. According to the present invention, a spherical cyclic olefin polymer having a high bulk density can be easily separated from the cyclic olefin polymer solution by precipitation.

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patent: 0-610-813 (1994-08-01), None
patent: 62-215611 (1987-09-01), None
patent: 11-158225 (1999-06-01), None

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