Preparation and characterization of a novel fluoro-silicone acrylate copolymer by semi-continuous emulsion polymerization

• The particle size of the latex was around 100 nm with a narrow size distribution.
• The latex films were stable at temperature as high as 400 °C.
• The water contact angles of cotton and silk fabrics were 125.8° and 120.7°.
• When D3F was 20 wt% of the total monomers, the copolymer obtained best property.

A novel fluoro-silicone acrylate (FSA) copolymer latex was synthesized with 2-acrylamido-2-methyl-propanesulfonic acid (AMPS), which served as a polymerizable emulsifier by semi-continuous emulsion polymerization. Methyl methacrylate (MMA), butyl acrylate (BA) and 1,3,5-trimethyltris (3,3,3-trifluoropyropyl) cyclotrisiloxane (D3F) were served as co-monomers while vinyltriethoxysilane (VTES) was used as a cross-linking agent. The structure and surface morphologies of the copolymer were characterized by FT-IR, 1H NMR, TEM, TGA and DSC. The influences of AMPS, D3F and VTES on the copolymer's properties of appearance, conversion rate, gel rate and solid content were discussed. The analytical results indicated that the FSA copolymer latex had a narrow particle size distribution around 100 nm with high temperature stability. The copolymer latex shows excellent water repellency with the contact angles of cotton and silk textile of 125.8° and 120.7°, respectively.

A semi-continuous emulsion polymerization in the presence of 2-acrylamide-2-methylpro panesulfonic which served as a polymerizable emulsifier was synthesized. The characterizations of the acrylate copolymer emulsion containing fluoro-silicone showed a sound performance.Figure optionsDownload as PowerPoint slide