| Titre : |
Silica gels sector to grow |
| Type de document : |
texte imprimé |
| Auteurs : |
David Kent, Auteur ; Tim Fletcher, Auteur ; Norbert Wings, Auteur |
| Année de publication : |
2004 |
| Article en page(s) : |
p. 12-14 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Anticorrosifs
Anticorrosion
Calcium
Gel de silice
Métaux -- Revêtements protecteurs
Pigments
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The author conclude, in Part 2, why silica gels will increase in popularity as the desire to couple high anti-corrosive perfomance with environmental awareness intensifies.
The development of more environmental friendly coating systems presents new challenges to the manufacturers of speciality chemicals and additives for coatings. New matting agents designed to meet the specific challenges provided by waterborne, high-solids and, to some extent UV curing systems have been commercialised in recent years. However, there is a continuiting demand for new, improved products and development programmes are ongoing. It is expected that calcium modified silica gel pigment technology will be turned to more and more as the preferred non-toxic method of corrosion control in all types of coatings, as the desire to couple high anti-corrosive performance with environmental awareness intensifies. |
| Note de contenu : |
- Addition levels
- Corrosion resistance suppression
- Other combinations
- Grades offered
- Weathering results
- FIGURES : 1. Representation of the surface of Ca/Silica pigments - 2. Diagrammatic representation of the mechanism of action of Ca/Silica pigments (ferrous substrates) - 3. Type ACs vs. zinc chromate in a 2 pack epoxy and a short oil alkyd after 10 years outdoor weathering - 4. The effect of Type AC3 in combination with silane A 187 on wet adhesion of a wash primer formulation on aluminium after water soaking at 40°C - 5. The effect of the combination of type with Alcophor 827 in a waterborne alkyd (resydrol 436W) on salt performance over degreased cold rolled steel - 6. Diagrammatic representation of the ion-exchange between silica gel and calcium ions.
- TABLES : 1. Typical properties of Ca/silica pigments compared to conventional anti-corrosive pigments - 2. A comparison of the different grades of calcium modified silica gel pigments |
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in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 194, N° 4482 (11/2004) . - p. 12-14
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