US EPA

2703291 

Journal Article 

Synthesis and surface properties of self-crosslinking core-shell acrylic copolymer emulsions containing fluorine/silicone in the shell 

Kim, DoH; Lee, YHee; Park, ChaC; Kim, HanDo 

2014 

Yes 

Colloid and Polymer Science
ISSN: 0303-402X
EISSN: 1435-1536 

292 

1 

173-183 

10.1007/s00396-013-3064-0 

WOS:000329239000017 

Stable emulsions of a core-shell acrylic copolymer (non-crosslinkable V0, and crosslinkable V2, V4, V6, and V8, where the numbers indicate the wt% of crosslinking agent based on the total acrylate monomer content) containing butyl acrylate (BA, 45 wt%), glycidyl methacrylate (GMA, 45 wt%), heptadecafluorodecyl methacrylate (PFA, 10 wt%), and various contents of crosslinking agent (vinyltriethoxysilane, VTES) were synthesized using a three-stage seeded emulsion polymerization process with a small amount of surfactant. The average particle size and viscosity of emulsions increased significantly with increasing VTES content. This study examined the effects of the VTES content on the surface/mechanical properties of self-crosslinked copolymer film samples containing a fixed acrylate monomer content to find the optimum VTES content. XPS showed that the film-air surface of the copolymer samples had a higher fluorine/silicone content than the film-dish interface. The tensile strength/modulus, thermal stability, and two Tgs (alpha and beta Tgs) of the film samples increased significantly with increasing VTES content. The contact angle of the film samples increased with increasing VTES content up to approximately 6 wt%, and then decreased slightly. The optimum VTES content was approximately 6 wt% based on the total acrylate monomer content to obtain a high water/oil repellent coating material (V6) with the highest water/methylene iodide-contact angles (118.2A degrees/81.8A degrees) and lowest surface energy (18.4 mN/m). 

Surface properties; Self-crosslinking; Core-shell emulsion; Fluorinated acrylic copolymer