Titre : |
L-Lactide chemistry : a safe and renewable building block for sustainable coatings |
Type de document : |
texte imprimé |
Auteurs : |
Armin Michel, Auteur |
Année de publication : |
2016 |
Article en page(s) : |
p. 10-12 |
Note générale : |
Bibliogr. |
Langues : |
Anglais (eng) |
Catégories : |
Chimie écologique Gaz à effet de serre -- Réduction LactideLe lactide est le diester cyclique de l’acide lactique et le monomère qui permet de synthétiser le PLA (Poly Lactique Acide) par polymérisation d’ouverture de cycle (ROP).
Issu de l’acide lactique (ou acide 2-hydroxypropanoïque) et produit par fermentation du saccharose ou du glucose, le lactide est d’origine naturelle et renouvelable. Ce produit s’inscrit parfaitement dans le cadre du développement de la chimie verte. Le lactide, étant issu de l’acide lactique qui possède 2 formes stéréo-isomériques (acide lactique L(+) et acide lactique D(-)),existe sous 3 formes stéréo-isomériques : la forme L-lactide, la forme D-lactide et la forme Méso-lactide. Polyalkydes Réduction des composés organiques volatils Revêtement -- Séchage:Peinture -- Séchage Rhéologie Viscosité
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Index. décimale : |
667.9 Revêtements et enduits |
Résumé : |
The potentiel of L-Lactide-modified alkyd resins to formulate lower VOC coatings with a reduced carbon footprint.
Sustainability continues to be a major trend in the paint and coatings industry. Government regulations, in particular, have been a key driver for change as the sector finds itself under increasing pressure to comply with ever more stringent environmental controls. In the USA, the Environmental Protection Agency has established clear guidance relating to emissions.
Meanwhile, the paint industry in China has recently undergone a significant step change with the introduction of an Environmental Protection Law in February 2015. The legislation is aimed at improving air quality across the country via the establishment of emission standards and has a direct impact on the coatings industry.
While government regulations and sustainability targets play a significant role, self-accountability and consumer preferences for bio-based alternatives have also become important drivers for rapid change. Besides meeting legislative requirements, industry players are reailsing that a reduced environmental footprint translates to a competitive advantage.
As such, there is pressure on oil members of the coatings value chain to focus on sustainability and the improvement of environmental performance ; from reducing water and energy consumption and lowering emissions during the production process ; to using more environmentally friendly raw materials, eliminating toxicity and increasing functionality. Bio-based technologies are coming to the fore as a result, with new research highlighting the potentiel of L-Lactide-modified alkyd resins to formulate lower VOC coatings with a reduced carbon footprint. |
Note de contenu : |
- Defining VOCs
- A growing market
- Leveraging L-lactide chemistry
- Superior sustainable performance
- Winning sustainable technology
- FIGURES : 1. Reduction of the diluted resin viscosity (>50%) at comparable solid (55%) - 2. Reduction of the resin viscosity (>50%) at comparable solid content in a saturated polyester resin - 3.SO medium-oil alkyd resin viscosity vs solid content - 4. Reduction of drying time (25°C ; 50% humidity) - 5. Air-drying time performance vs cobalt content (25°C ; 50% humidity) |
En ligne : |
https://drive.google.com/file/d/1lxpDc3u5gB3Wry9TI5nrD3ypxksv5NjV/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27102 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 206, N° 4625 (10/2016) . - p. 10-12