Hyperbranched polyaspartate esters and a process for their preparation
US5561214A · kind A · utility
32Cited by
1References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 1995 |
| Grant date | Oct 1, 1996 |
| Priority date | — |
| Expiry date | May 18, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J201/005
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to hyperbranched polyaspartate esters containing repeating structural units corresponding to the formula I and/or II ##STR1## The present invention also relates to a process for the preparation of these hyperbranched polyaspartate esters by self condensing, via a transesterification reaction, at least a portion of the hydroxy and ester groups of the hydroxy aspartates corresponding to the above formula at a temperature of 60.degree. to 240.degree. C. to form hyperbranched polyaspartate esters and eliminating alcohols having the formula R.sub.1 --OH and/or R.sub.2 --OH.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.