[article]
| Titre : |
Impact of the new chelating agents GLDA and MGDA in detergents |
| Type de document : |
texte imprimé |
| Auteurs : |
Jan Seetz, Auteur ; Gabi Bongen, Auteur ; Klaus Henning, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 10-16 |
| Langues : |
Anglais (eng) |
| Catégories : |
Chélates
Détergents
|
| Index. décimale : |
668.1 Agents tensioactifs : savons, détergents |
| Résumé : |
The modern strong chelating agents GLDA (glutamic acid N,N-diacetic acid) and MGDA (methylglycinediacetic acid) are quickly biodegradable and are not labelled as dangerous. They have the ability to bind calcium and magnesium ions, which bind most of the stains to the surface. These chelates are also able to remove hard water carbonate scales, transforming them into water soluble metal chelates and will prevent the inactivation of anionic surfactants by water hardness cations, which will greatly improve the detergency power. |
| Note de contenu : |
- Hard water scale
- Chelating agents of the 1st and 2nd generation
- Efficacy spectrum of chelating agents
- Dissolving hard water scale (CaCO3)
- Inactivation of anionic surfactants by water hardness
- Bond strength of chelating agents for metal ions
- Water softening
- Improved product performance
- Car washing cleaners
- Kitchen cleaners
- Laundry detergents
- Dish detergents
- Hand dish detergents
- FIGURES : 1. Improvement of detergency power by a chelating - 2. Structural chemical forulas of 1st and 2nd generation of chelating agentson - 3. Molar efficiency of CaCO23 by various chelating agents (pH 8, 10 minutes exposure time) - 4. Water hardness raises the Krafft temperature of anionic surfactans to a high level - 5. Conditional stability constants K' of calcium chelates - 6. The necessary amount for water softening is determined by the strength of metal chelate formed - 7. Improved non-mechanically removal of automotive dirt by rinsing with a cleaning solution containing the strongchelating agents MGDA and GLDA compared to weak chelating agents citrate and STPP - 8. Determination of the cleaning efficiency of kitchen cleaners in scrub test on gravy soil (soil 1, tests : Julius Hoesch, Düren) - 10. Determination of cleaning efficiency with narrow ranged nonionic C9-C11 4 E0 (Berol 260), chelating agent GLDA and non-aqueous solvent PnP (Formulations JH #1 and JH #2 Julius Hoesch, Düren ; test : Julius Hoesch, Düren) - 11. Solubility of sodium chelates depending on the sodium hydroxide concentration
- TABLES : 1.Grading, composition and product characteristic of tested kitchen cleaners - 2. Performance improvement of kitchen cleners by narrow ranged nonionic C9-C11 4 EO (Berol 260), chelating agent GLDA and non-aqueous solvent PnP (Formulations JH #1 and JH #2 Julius Hoesch, Düren ; test : Julius Hoesch, Düren) |
| En ligne : |
https://drive.google.com/file/d/1GomklaOhESDkOIv7aeMdbTzNOW7yPo_q/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30680 |
in SOFW JOURNAL > Vol. 144, N° 5 (05/2018) . - p. 10-16
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