.beta.-diketones, processes for making .beta.-diketones and use of .beta.-diketones as stabilizers for PVC
US5475145A · kind A · utility
2Cited by
12References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1993 |
| Grant date | Dec 12, 1995 |
| Priority date | — |
| Expiry date | Nov 5, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/07
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention is directed to compositions containing novel beta-diketones of formula (I) and formula (II), EQU R.sub.1 COCH.sub.2 COR.sub.2 (I) EQU R.sub.2 COCH.sub.2 COR.sub.2 (II) which may be used to stabilize various polymers, such as polyvinyl chlorides (PVCs). The present invention is also directed to a method for preparing .beta.-diketones by a Claisen condensation reaction, which is represented as follows: EQU R.sub.4 COCHR.sub.5 H+R.sub.6 C(O)OR.sub.7 +RO.sup.- .fwdarw.[R.sub.4 COCR.sub.5 COR.sub.6 ]--+R.sub.7 OH+ROH.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.