Ring-opened polymer from norbornene type of polycyclic monomer and process for producing the polymer
US5061771A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1989 |
| Grant date | Oct 29, 1991 |
| Priority date | — |
| Expiry date | Nov 8, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G61/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
(1) A solvent-soluble ring-opened polymer constituted of 100-50% by weight of a norbornene derivative of monomer (A) represented by the formula ##STR1## wherein, R.sub.1 and R.sub.2 are the same or different and each denote hydrogen or alkyl and m denotes an interger of 0 to 2, and 0-50% by weight of another norbornene derivative of monomer (B) capable of undergoing ring-opening copolymerization with the preceding monomer (A), the polymer having a number average molecular weight of 10,000 to 50,000, a weight average molecular weight-to-number average molecular weight ratio (Mw/Mn) of up to 3, and a glass transition temperature of at least 80.degree. C., and (2) a process for producing such ring-opened polymers as stated above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.