[article]
| Titre : |
Antistatic coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Frank Ott, Auteur ; Jürgen Patzlaff, Auteur ; Reinhold Rüger, Auteur |
| Année de publication : |
2006 |
| Article en page(s) : |
p. 28-30 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Antistatiques
Pigments
Revêtements de sols:Peinture de sols
|
| Index. décimale : |
667.2 Colorants et pigments |
| Résumé : |
The authors discuss the development of transparent or light coloured conductive materials. Almost everybody has his personal experience with electrostatic charging, for example, walking on parquet, laminate or plastic floor and feeling an electric shock touching the door handle or the handrail. What is merely unpleasant and sometimes painful can create severe damage for electronic devices. Uncontrolled electric discharging is a high rick in manufacturing, packaging and transportation of sensitive electronic parts. Electric flashover is also known to be a severe hazard in areas where flammable, chemicals, solvents, gases or dusts are handled. Therefore, control of electrostatic charging is a must for fire and explosion protection in laboratories, manufacturing areas and transportation vehicles. Common polymer binders used in coatings are insulators and electrostatic charging of coated surfaces is out of control, in particular under dry conditions. For the above-mentioned reasons, there is an increasing demand to provide coatings and plastics with conductive and antistatic properties. For a long time, formulators have used various additives to implement some conductivity into coatings. So far, materials in use for such purposes have significant limitations. Well known and long established in conductive coatings is carbon black but its significant limitation is its deep black colour not allowing the formulation of light coloured coatings. In general, black or dark coloured floorings, for example, are not widely accepted for aesthetic or practical reasons. This is especially an issue in clean rooms and hospitals. Metal powders, such as silver powder, silver flakes or, alternatively, silver coated glass beads or mica are used in the electronic industry but have found only niche applications in coatings for cost reasons. Salt-like additives on the other hand are colourless but require a certain degree of humidity to a coating antistatic. Furthermore, their function is not permanent and conductivity is unstable with air humidity and diminishes over time. In order to provide designers and formulators with the opportunity to combine conductivity and light colours suitable conductive pigments are required. |
| Note de contenu : |
- Conducting metal oxides
- Minatec conductive pigments
- Pigment composition
- Mode of action
- Advantages
- Applications |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27503 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 196, N° 4505 (10/2006) . - p. 28-30
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