Patent · US Expired

Ring-opened polynorbornenes

US7157523B2 · kind B2 · utility

0Cited by

10References

12Claims

0Family size

Assignee

JSR CORPORATION · JP

Inventors

Nobuyuki Miyaki · Tokyo, JP
Yoshikazu Miyamoto · Tokyo, JP
Souichi Yoshida · Tokyo, JP
Yuichi Hashiguchi · Tokyo, JP

Key dates

Filing date	Nov 12, 2003
Grant date	Jan 2, 2007
Priority date	—
Expiry date	Nov 12, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S525/94
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The disclosure is directed to a partially hydrogenated ring-opened polynorbornene and a process for making the same. The ring-opened polynorbornene is low in birefringence, high in wavelength dependency about birefringence and excellent in transparency and heat resistance.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.