Polyester polycarbonates
US4267120A · kind A · utility
28Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1979 |
| Grant date | May 12, 1981 |
| Priority date | — |
| Expiry date | Dec 14, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/902
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Covers polyester polycarbonates of the structure: ##STR1## wherein X and Y, independently, are H, methyl, or ethyl, m and n independently are integers of 1-5, R is a nucleus of a glycol selected from the group of lower alkylene glycols and polyalkylene glycols of up to about 600 molecular weight, Z is an organic radical from a cyclic organic acid anhydride having 4-20 carbon atoms, and r is an integer of 1-5. Also covers a method of preparing said polyester polycarbonates as well as polyurethanes derived therefrom, as well as polyisocyanurate polymers containing both isocyanurate linkages and urethane linkages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.