Waterborne paints containing nano-sized crystalline domains formed by comb-like polymers

Designed incorporation of semi-crystalline domains into structured latex particles via solvent-aided emulsion polymerization

“…Mehravar et al have recently reported the use of crystalline polymeric domains to reinforce coatings made from acrylic latexes. [26][27][28][29] For example, the synthesis of a semi-crystalline latex composed of poly(stearyl acrylate) by miniemulsion polymerization followed by a seeded emulsion polymerization of methyl methacrylate and butyl acrylate gave a semi-crystalline core-amorphous shell latex that formed a film at ambient temperature. The inclusion of semi-crystalline domains was shown to lead to higher Young's modulus and tensile strength, as well as resulting in improved barrier properties of the film.…”

Phase Separation Driven On-Demand Debondable Waterborne Pressure-Sensitive Adhesives

“…For that the PSA tape strips (12.5 cm × 2.5 cm) on a stainless steel (SS) substrate under pressure (4 passes of a 2 kg roller) at 23 °C followed by a 20 min build up in adhesion. The PET-adhesive-SS system (Scheme 1) was annealed at 60 °C (just above the melting temperature (51 °C) of the semicrystalline phase [22,24,25] for 10 min and then allowed to cool down to room temperature. Peel strength before and after annealing was measured.…”

Semi‐crystalline/amorphous latex blends for coatings with improved mechanical performance

“…While the examples above have used amorphous polymers, recent work has demonstrated that semi‐crystalline polymers can be used to provide a reinforcing hard phase. Mehravar et al synthesized a series of poly(stearyl acrylate) core/poly(methyl methacrylate‐co‐butyl acrylate) shell latexes and demonstrated that the semi‐crystalline poly(stearyl acrylate) phase significantly improved the Young's modulus and can also result in significantly reduced water vapor transmission and improved anticorrosion resistance 20–23 . While this work has shown the possibilities of using semi‐crystalline domains to reinforce amorphous systems, the core‐shell morphology of the hybrid latexes used resulted in sub‐optimum enhancement in the mechanical properties 24 …”