Organobismuth(III) and organobismuth(V) carboxylates and their evaluation as paint driers
✍ Scribed by Mushtaq Ali; William R McWhinnie
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 422 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0268-2605
No coin nor oath required. For personal study only.
✦ Synopsis
A range of bismuth and organobismuth carboxylates has been prepared (e.g. Bi(carboxylate)3; PhBi(carboxylate'),; and Ph,Bi(carboxylate"), where carboxylate = octanoate, i.e. 5-ethylhexanoate; carboxylate' = acetate and monomaleate; carboxylate" = acetate, propionate, benzoate, 5-ethylhexanoate, and 0.5 oxalate. A combination of IR (solid) and NMR (solution) studies suggests that in the case of the bismuth(V) compounds the carboxylates may be inequivalent in the crystalline forms but equivalent in solution. The compounds have been tested as driers in two paint formulations, Synolac SOW (linseed-based) and Sorbal P470 (linoleic-rich). Although initially promising results were obtained for Synolac 50W, the shelf life of the bismuth driers was poor. With Sorbal P470, bismuth driers were inferior to established formulations. However, a combination of Bi(OOCH,H,,), with tris(diethyldithiocarbamat0)bismuth(II1) out-performed established driers.