| Titre : |
Resin design for a sustainable future : Using fatty acid modified polyurethane dispersions in paints to combine excellent performance with a safer end product |
| Type de document : |
texte imprimé |
| Auteurs : |
Bas Tuijtelaars, Auteur ; Cor Koning, Auteur ; Bauke de Vries, Auteur ; Bert Hofkamp, Auteur ; Roel Swaans, Auteur ; Diane de Bruijne, Auteur ; Derrick Twene, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 48-55 |
| Note générale : |
Erratum Fig. 2 et 3 p. 55 - Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Composés organiques volatils
Diisocyanates
Liants
Polymères en émulsion
Polyuréthanes
Produits chimiques -- Toxicologie
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
Triéthylamine
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Neutralising amines such as triethylamine are widely used in water-borne polyurethane dispersions where they stabilise the polymer particles. After application these toxic amines evaporate from the coating posing a risk to human health and the environment. |
| Note de contenu : |
- Reducing environmental impact
- Optimising polyurethane dispersions
- Volatile amines beneficial to performance
- Toxic when drying
- Emission tests prove tea release
- Volatile organic amines are the main contributor to emissions
- New systems protect end user health
- Developing a resin with no health risks
- Tailored PU design improves resistance
- Environmentally friendly and high performance
- New non-toxic binders offer a sustainable future
- FIGURES : 1. Example of green standards and ecolabels - 2. Schematic formation of a polyurethane dispersion, using a tertiary amine as neutralising agent. The generated salt groups act as internal dispersants, stabilising the emulsions - 3. TEA labeling - 4. The results for the online monitoring of triethylamine (TEA) emissions in ambient air, originated from a 100 µm paint film based on a commercially available urethanised alkyd dispersion for DSM. The blue curve represents the TEA concentration in the air chamber over time = t. The red curve represents the cumulative amount of TEA emitted (in mg) - 5. Results of monitoring triethylamine (TEA) emissions in ambient air, originated from a 50 µm polyurethane film based on three commercially availagle urethanised alkyd dispersions and four corresponding commercial paints. The curves represent the collected TEA in the air chamber over time = t - 6. Calculated VOC content of a physically drying parquet lacquer based on a commercial polyurethane dispersion. Initial concentration of the co-solvents is much higher compared with the volatile amine. R values of measurements at 3, 7 and 28 days, according to AgBB emission testing on this lacquer. Triethylamine contributes to 80-90 % on the calculated R-value because of its low LCI value - 7. Water resistance and chemical rsistances of the four auto-oxidisable polyurethane dispersions listed in Table 2 according to DIN-68861-1 1B. The bars for chemical resistances represent an average of 5 different staining resistances (coffee, tea, ethanol, red wine and hand cream). Score : 0 = very poor, 5 = excellent
- TABLES : 1. Total VOC (g/l) according to ISO 11890-2 - 2. Comparison of dispersion characteristics and dry film properties of four auto-oxidisable polyurethane disprsions with different stabilising and neutralising compounds. Sores for smell : - means bad smell ; ++ means odourless - 3. Overview of the environmental advantages of the amine-free #4 based on an alternative acid and a permanent based, compared with the TEA-containing reference system #1 (see Table 2) |
| En ligne : |
https://drive.google.com/file/d/1JWDWjgCJiQJCEZ1UuBPFFiZDP-rddP2W/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28557 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 5 (05/2017) . - p. 48-55
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