Synthesis of macrocyclic polymers by ring insertion...

Details Synthesis of macrocyclic polymers by ring insertion... Synthesis of macrocyclic polymers by ring insertion...

2005-09-20

2005-09-20

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...

C526S172000, C526S348000, C525S240000, C502S155000, C502S167000, C548S101000, C548S103000, C556S136000, C560S205000, C564S161000

Reexamination Certificate

active

06946533

ABSTRACT:
A method for synthesizing cyclic polymers using transition metal alkylidene complexes as reaction catalysts is provided, wherein the complexes contain a cyclic group. Polymerization is carried out on the catalyst, using cyclic olefin monomers that undergo ring insertion polymerization, and no linear intermediates are generated. Following completion of polymerization, the cyclic polymer detaches from the complex via an intramolecular chain transfer reaction and the catalytic complex is regenerated. The invention also provides novel transition metal alkylidene complexes useful as catalysts in the aforementioned process, as well as novel cyclic hydrocarbons.

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