Method for introducing carbonyl groups into polymers containing double carbon-carbon linkages
Патенты
| Язык: |
Английский |
| Тип: |
Патент на изобретение |
| Номер (11) |
EP 1627890 B1 |
| Номер заявки (21): |
04733505.4 |
| Дата подачи заявки (22): |
17 мая 2004 г. |
| Дата начала отсчета срока действия патента (24): |
|
| Дата публикации патента (44,45,46): |
17 сент. 2008 г. |
| Дата публикации заявки (43): |
22 февр. 2006 г. |
The invention discloses a method for selectively introducing carbonyl groups into polymers by oxygenation of double C=C bonds of polymers with the aid of nitrous oxide (N 2 O) at a temperature comprised between 50 and 350°C and a pressure of N 2 O of from 0.01 to 100 atmospheres. The introduction of an insignificant amount of C=O groups allows one to modify the physico-chemical properties of a polymer, with its molecular weight and molecular-weight distribution preserved. Deeper oxygenation results in controlled cleavage of polymer macromolecules and makes it possible to produce oxygen-containing oligomers having a desired molecular weight.