Production of polymer particles with ethyleneurea groups by emulsifier‐free emulsion polymerization and the wet adhesion property of the emulsion film

Abstract

A film was prepared from an n-butyl methacrylate/methacrylamide ethylethyleneurea (EU) copolymer [P(BMA-EU)] emulsion produced by an emulsifierfree emulsion copolymerization. The wet adhesion of the emulsion film on an alkyd resin was significantly improved by copolymerization with a small amount of EU (0.5-1.0 mol %). A sodium dodecyl sulfate emulsifier, postadded to the emulsifier-free emulsion, reduced the wet adhesion. The wet adhesion of a film prepared from a poly(n-butyl methacrylate) (PBMA)/P(BMA-EU) composite emulsion produced by an emulsifier-free seeded emulsion copolymerization with PBMA seed particles was higher than that of a P(BMA-EU) film with the same EU content. The localization of EU and the cleanliness at the particle surface were also key factors in the improvement of the wet adhesion of the polymer emulsion film.

Erratum: 1-Methylcyclopropene affects the antioxidant system of apricots (Prunus armeniaca L. cv. Búlida) during storage at low temperature

“…However, the synthesis of smaller latexes usually requires additional surfactant, which can compromise the quality of waterborne coatings (e.g. poor adhesion and reduced film quality due to migration of excess surfactant) 2. In principle, reactive surfactants offer a potentially decisive advantage over conventional surfactants in emulsion polymerization because they bind irreversibly to the latex and hence cannot migrate during film formation; this allows defect‐free coatings to be produced with reduced moisture sensitivity 3…”

RAFT Synthesis of Sterically Stabilized Methacrylic Nanolatexes and Vesicles by Aqueous Dispersion Polymerization

“…poor adhesion and reduced film quality due to migration of excess surfactant). [2] In principle, reactive surfactants offer a potentially decisive advantage over conventional surfactants in emulsion polymerization because they bind irreversibly to the latex and hence cannot migrate during film formation; this allows defect-free coatings to be produced with reduced moisture sensitivity. [3] Over the last two decades, controlled/living radical polymerization techniques have become powerful tools in polymer synthesis.…”

Environmentally‐Friendly Acrylates‐Based Polymer Latices

“…A fi lm was prepared from BMA/ethylene urea (EU) emulsion copolymer by Okubo et al [142]. Th e wet adhesion of the emulsion fi lm on an alkyd resin was signifi cantly improved by copolymerization with a small amount of EU (0.5-1.0 mol%).…”