Preparation and Characterization of Styrene/Butyl Acrylate Emulsifier-Free Latex with 2-Acrylamido-2-Methyl Propane Sulfonic Acid as a Reactive Emulsifier

Abstract

A kind of emulsifier-free latex (FL) was successfully synthesized from styrene (St) and butyl acrylate (BA) with 2-acrylamido-2-methyl propane sulfonic acid (AMPS) as a reactive emulsifier. The particle size of latex particles, stability against electrolytes, minimum film forming temperature (MFT) and water contact angle (CA) were evaluated and compared with a conventional latex (CL). Test results show that FL has larger particle size, better stability against electrolytes and lower MFT value compared with CL; higher AMPS content leads to smaller particle size and smaller water CA.

Keywords:

• 2-Acrylamido-2-methyl propane sulfonic acid (AMPS)
• contact angle
• emulsifier-free emulsion polymerization
• minimum film forming temperature
• particle size

Notes

Other conditions: St = 40 g; BA = 60 g; KPS = 0.5 g; AMPS = (SDBS + OP-10) = 3.0 g.

Other conditions: St = 40 g; BA = 60 g; KPS = 0.5 g; AMPS = (SDBS + OP-10) = 3.0 g· + = stable after two months; ++ = flocculation in 30 days.

Other conditions: St = 40 g; BA = 60 g; KPS = 0.5 g; AMPS = (SDBS + OP-10) = 3.0 g.

+ = stable after two months.

++ = flocculation in 30 days.

Other conditions: St = 40 g; BA = 60 g; water = 150 g; KPS = 0.5 g; wt% of AMPS is based on total monomers.

Other conditions: water = 150 g; AMPS = (SDBS + OP-10) = 3.0 g; KPS = 0.5 g.

Other conditions: St = 40 g; BA = 60 g; water = 150 g; KPS = 0.5 g; wt% of AMPS is based on total monomers.