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6. Formula optimization considerations
Although the choice of plasticizer is relatively limited, it is important to select it in such a way as to obtain the greatest benefits. This paragraph is intended to facilitate optimization – particularly from an economic point of view – of the ingredients of a formula containing a plasticizer.
6.1 Search for a technically acceptable formulation
The formulator (possibly assisted by a computer program) can quickly propose a basic formula which, from experience, satisfies most of the requirements of the specification (generally, tensile properties at imposed speed). A few factors then need to be modified to meet additional requirements, and the full range of solutions studied. The choice of plasticizer mix is often the key.
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References
- (1) - SEARS (J.K.), DARBY (J.R.) - The technology of plasticizers. - Willey & Sons Ed., 1 166 p. (ouvrage encyclopédique donnant près de 1 500 références sur 240 p. et décrivant les propriétés physiques de l'ensemble des plastifiants utilisés aujourd'hui et les propriétés des produits plastifiés) (1982).
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Standardization
- Plastiques et ébonite. Détermination de la dureté par pénétration au moyen d'un duromètre (Dureté Shore) (indice de classement : T 51-109). - NF ISO 868 - 9-86
- Plastiques. Détermination de la rigidité en torsion des plastiques souples. Partie 1 : Méthode générale (indice de classement : T 51-102). - NF ISO 458 /1 - 9-86
NF: French standards published by AFNOR (Association Française de Normalisation)....
Main suppliers of phthalates (and their brand names)
BASF AG (Palatinate) – BASF (Cie française).
Exxon Chemical Co. (Jayflex ) – Exxon Chemical France.
Hüls AG (Vestinol ) – Hüls France.
ICI Ltd (Hexaplast ) – ICI France SA.
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