[article]
| Titre : |
A fluorine–silicone acrylic resin modified with UV-absorbing monomers and a free radical scavenger |
| Type de document : |
texte imprimé |
| Auteurs : |
Huibin Lei, Auteur ; Deliang He, Auteur ; Jun Hu, Auteur ; Ping Li, Auteur ; Haihong Huang, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 809-817 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Absorbeurs de rayonnement ultraviolet
Absorption
Angle de contact
Antiradicalaire
Fluor
Hydrophobie
Polyacryliques
Radicaux libres (chimie)
Rayonnement ultraviolet
Résistance aux conditions climatiques
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).
Vernis -- Propriétés mécaniques
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A novel UV-absorbing and free-radical-catching fluorine–silicone acrylic resin with 2-(4-benzoyl-3-hydroxyphenoxy) ethyl acrylate (BHEA), 2,2,6,6-tetramethyl-4-piperidyl methacrylate (TMPM), dodecafluoroheptyl methacrylate (DFMA) and 3-methacryloxypropyltrimethoxysilane (MPS) as functional monomers was successfully synthesized by solution copolymerization. Based on various investigations, our characterization results for the resin and its coating indicated that the resin exhibits high UV-absorbing and free-radical-catching performances, and the hydrophobicity of the varnish coating was promoted by the actions of fluorine and silicone. In addition, the weatherability improved because of the enduring triple protection of the UV absorbent (BHEA), free-radical-catching agent (TMPM), fluorine (DFMA) and silicone (MPS). After a 1000-h aging test, the color difference (∆E) and rate of loss of gloss (∆G) of varnish coatings were 2.96% and 62%, respectively, and the impact strength and flexibility of color paint coatings were 420 N cm and 2 mm, respectively. Moreover, the chemically bonded free-radical-catching agent (TMPM) showed a more enduring performance for producing nitroxides than the simple blend. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of the resins and coatings - Characterizations
- RESULTS AND DISCUSSION : FTIR analysis - X-ray photoelectron spectroscopy (XPS) analysis - Ultraviolet absorption properties - Free-radical-catching performance - Water contact angle (CA) - Weather resistance - Mechanical properties |
| DOI : |
10.1007/s11998-018-0078-z |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0078-z.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30858 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 809-817
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A fluorine–silicone acrylic resin modified with UV-absorbing monomers and a free radical scavenger in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)
