The effects of zinc borate (ZB), aluminum trihydrate (ATH), and their mixture on the flame-retardant and smoke-suppressant properties of poly(vinyl chloride) (PVC) as well as their mechanism for flame retardancy and smoke suppression were studied through the limiting oxygen index (LOI) test, smoke d
The optimization of the smoke suppressant and flame retardant properties of flexible PVC
โ Scribed by P. Carty; E. Metcalfe; W. N. Annison
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 310 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0021-8995
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โฆ Synopsis
The combination of mixture diagrams and quality functions can be a straightforward and rapid method of simultaneously optimizing polymer formulations for both flame retardancy and smoke suppression. For a semirigid PVC formulation using a three-component additive mixture it was found possible to raise the limiting oxygen index by over 7 units, while simultaneously reducing smoke production by more than 20%.
๐ SIMILAR VOLUMES
Zinc hydroxystannate (ZHS), at levels of 2-5 phr, and the hydrated fillers, magnesium hydroxide (MH) and alumina trihydrate (ATH), at levels of 20-50 phr, are effective flame retardants and smoke suppressants for flexible PVC. Novel ZHS-coated hydrated fillers are found to exhibit markedly improved
Potassium aluminum sulphate, hereafter referred to as alum, was used as a flame-retardant for some African timbers. It was observed that this treatment did not drastically reduce the strength of these timbers. Reasons are adduced to explain this result.