| Titre : |
Surfactants with sticking power : New technology improves performance to emulsion polymerization formulations in many high-value applications |
| Type de document : |
texte imprimé |
| Auteurs : |
Dan Howe, Auteur ; Jo Grade, Auteur |
| Année de publication : |
2002 |
| Article en page(s) : |
p. 28-31 |
| Langues : |
Américain (ame) |
| Catégories : |
Latex
Polymères en émulsion
Polymérisation en émulsion
Surfactants
|
| Index. décimale : |
668.3 Adhésifs et produits semblables |
| Résumé : |
Water-based polymer dispersions are used in many applications including protective coatings, paper coatings, binders for textile printing or for nonwoven fabrics and adhesives. In many areas they compete with solvent-based polymers. However, these solvent-based formulations are coming under increasing pressure from environmental legislation looking to decrease process emissions, in particular volatile organic compounds (VOCs).
In global terms, around 2 million tons of polymer are produced annually via emulsion polymerization or other heterogeneous polymerization processes. The end product of emulsion polymerization is a dispersion of particles in water, otherwise known as latex. Surfactants play a crucial role in all aspects of the production and use of latex polymers.
They help protect the latex particles from agglomeration due to external stresses experienced throughout the production process and beyond. These include temperature fluctuations in storage, shear forces during handling, compounding and during application of the final film.
The global market for surfactants in these processes is estiinated to be several tens of thousands of tons.
We estimate nonionic and anionic surfactants used in emulsion polymerization processing in the adhesives sector are around 20,000 tons annually. By comparison, the equivalent usage in polyvinyl acetate (PVAc) and acrylic paints is approximately 32,000 tons per year.
The market for emulsion polymers is highly competitive, with a historical growth rate of around 2 percent per year. Through constant pressure in areas such as VOC reduction there is a trend for increasing use of such water-based polymer systems to replace solvent-based systems.
The challenge for producers is to produce new water-based technologies that can match solvent-based performance while retaining excellent environmental characteristics. |
| Note de contenu : |
- A necessary evil ?
- Non-migratory surfactants
- Model benefit for adhesives
- NMS formulations
- NMS benefits
- Trademarks |
| En ligne : |
https://drive.google.com/file/d/1ArTUAwACXBFOdMdBXzDqysQl1b4gasUX/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20007 |
in ADHESIVES AGE > Vol. 45, N° 6 (06/2002) . - p. 28-31
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