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US 11,390,709 B2Granted
Liquid copolymer formed by ring-opening copolymerization of cyclopentene, crosslinkable composition, and crosslinked rubber object
AssigneeZeon Corporation
InventorYasuo Tsunogae
Life of this patent
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Abstract
A liquid cyclopentene ring-opened copolymer includes a monomer unit derived from cyclopentene and a monomer unit derived from a norbornene compound, the monomer unit derived from cyclopentene being present in an amount of 60 to 95 wt %, the liquid cyclopentene ring-opened copolymer having a hydroxyl group-terminated copolymer chain and having a melt viscosity at 25° C. of less than 500 Pa·s, which is measured using a B-type viscometer.
Claims7
A liquid cyclopentene ring-opened copolymer comprising a monomer unit derived from cyclopentene and a monomer unit derived from a norbornene compound,
- the monomer unit derived from cyclopentene being present in an amount of 60 to 95 wt %,
- the liquid cyclopentene ring-opened copolymer having a hydroxyl group-terminated copolymer chain and having a melt viscosity at 25° C. of less than 500 P·s, which is measured using a B-type viscometer at a shear rate of within the range of 1.2 to 10 sec−1.
Dependencies are inferred from the claim text.