Composition comprising bicyclic carbonate oligomer
US4701538A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1985 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | Nov 12, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A composition comprising a cyclic oligomer of the formula ##STR1## wherein X is selected from the group consisting of alkylene of two to twelve carbon atoms, inclusive, alkylidene of one to twelve carbon atoms, inclusive, cycloalkylene of four to twelve carbon atoms, inclusive cycloalkylidene of four to twelve carbon atoms, inclusive, --S--, --O--, --S--S--, ##STR2## a is zero or 1; n and m are the same or different and are integers of one to about fifteen; PA0 R is alkylene of two to eight carbon atoms, inclusive or alkylidene of one to eight carbon atoms, inclusive, phenylene or a single bond. PA0 R.sup.1 and R.sup.2 are the same or different and are alkyl or one to four carbon atoms, inclusive or halo; PA0 b and c are the same or different and are integers of zero to four; and PA0 R.sub.3 and R.sub.4 are the same or different and are alkyl of one to eight carbon atoms, inclusive, phenyl, hydrogen or R.sub.3 and R.sub.4 are taken together to form an alkylene of two to eight carbon atoms inclusive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.