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Preparation of high solids content poly(n-butyl acrylate) latexes through miniemulsion polymerization

✍ Scribed by J. R. Leiza; E. D. Sudol; M. S. El-Aasser

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
250 KB
Volume
64
Category
Article
ISSN
0021-8995

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✦ Synopsis

An approach to prepare high solids content latexes ( ΓΊ50 wt %) is presented. The approach is based on a two-stage polymerization where in the first stage low-tomedium solids content seed latexes with a broad particle-size distribution (PSD) were prepared by semicontinuous miniemulsion polymerization. In the second polymerization stage, the solids contents of the latexes prepared in the previous step were increased to 60-70 wt % using relatively low emulsifier concentrations. The approach was used successfully to prepare fluid-and coagulum-free poly(n-butyl acrylate) latexes up to solids contents of 61 wt % using an emulsifier (sodium lauryl sulfate) concentration of 0.5 wt % based on a monomer. Nonfluid (pastelike) latexes having solids contents higher than 61 wt % were also prepared using this method. As a result, some guidelines related to the required particle-size distribution to produce fluid latexes of higher solids contents are also presented.

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## Abstract The preparation of a series of poly(__n__‐butyl acrylate‐__co__‐acrylic acid) latexes with different contents of chain‐transfer agent are reported, and investigations into the adhesive properties of the latexes were made. The latexes were prepared at a solid content of 50 wt % by a two‐