| Titre : |
Better resin management |
| Type de document : |
texte imprimé |
| Auteurs : |
Shao-Hua Guo, Auteur ; Wei Wang, Auteur ; Stephen H. Harris, Auteur ; Shanty Patel, Auteur ; L. Joseph Junker, Auteur ; Ronald S. Blackwell, Auteur ; Farhad Faddakar, Auteur ; Daniel B. Pourreau, Auteur |
| Année de publication : |
2002 |
| Article en page(s) : |
p. 24-27 |
| Langues : |
Anglais (eng) |
| Catégories : |
Acrylates hydroxy-fonctionnels
Automobiles -- Revêtements:Automobiles -- Peinture
Copolymère uréthane acrylique
Durée de vie en pot
Formulation (Génie chimique)
Groupe allyle
Polyhydroxyéthyle acétate
Polyméthacrylate d'hydroxyéthyle
Polyols
Revêtements bi-composant:Peinture bi-composant
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The evolution in the approach for developing low-VOC coatings is examined.
Acrylic two-component (2K) urethane technology has undergone a gradual evolution over the past twenty years. Incremental changes in acrylic polyols and isocyanate crosslinkers have been, for the most part, driven by lower VOC content limits and increased performance requirements.
However, the basic chemistry of acrylic polyols has not substantially changed over that time period. Almost every acrylic polyol on the market today is obtained by free-radical polymerisation of acrylate and methacrylate esters and styrene. Hydroxyl functionality is introduced by adding hydro-functional acrylates (HFAs) to the monomer blend. |
| Note de contenu : |
- Lower VOCs hits performance
- The resin management concept
- End-use versatility
- Improving control
- Resin management at work
- Pot life
- Overall benefits
- FIGURES : 1. Hydroxy-functional acrylates (HFA) used in conventional polyols - 2. HFA polyols have greater variation of functionality with weight - 3. Allylic monomers used in the latest acrylic polyols - 4. Comparison of HEMA-based and AP1.0-based polyols
- TABLE : White pigmented 2K urethane formulations from hard and soft blends and commercial acrylic polyols |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28083 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 192, N° 4452 (05/2002) . - p. 24-27
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