Open-ring copolymer, hydrogenated open-ring copolymer,...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

Reexamination Certificate

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C526S171000, C526S279000, C526S283000, C525S326500, C525S328800, C525S329500, C525S338000, C524S553000

Reexamination Certificate

active

06995226

ABSTRACT:
A ring-opened metathesis copolymer and its hydrogenated product having a desired monomer unit ratio and a high molecular weight and having hydroxyl groups or hydroxycarbonyl groups can be obtained by conducting a ring-opening metathesis copolymerization of a norbornene-type monomer having hydroxyl groups or hydroxycarbonyl groups with an unsubstituted norbornene-type monomer having at least three rings in the presence of a catalyst predominantly comprised of an organic ruthenium compound having coordinated therewith a neutral electron-donating ligand, and, if desired, hydrogenating the resulting copolymer. The thus-obtained ring-opened metathesis copolymer and its hydrogenation product are characterized by having a low water absorption, good adhesion to metal and other materials, good compatibility with a curing agent and other compounds, and high heat resistance, and exhibiting reduced signal retardation and signal noise.

REFERENCES:
patent: 6197894 (2001-03-01), Sunaga et al.
patent: 6486264 (2002-11-01), Tsunogae et al.
patent: 6713154 (2004-03-01), Tsunogae et al.
patent: 0 827 975 (1998-11-01), None
patent: 11-52574 (1999-02-01), None
patent: 2001-30272 (2001-02-01), None

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