Aqueous dispersion and process for preparation thereof
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United States of America Patent
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Oct 4, 1988
Issued Date -
N/A
app pub date -
Dec 16, 1987
filing date -
Jul 25, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
When a hydrophobic thermoplastic resin such as an olefin resin and a water-insoluble or non-water-swelling polymer containing a carboxylic acid salt group are melt-kneaded in the presence of water, phase inversion of forming a dispersion comprising water as the dispersion medium phase and resin particles as the dispersed phase is caused even if the amount of water is very small. If an anionic surfactant, optionally together with a solvent or oil, is made present in the composition to be melt-kneaded, the size of dispersed particles can be greatly reduced in the formed aqueous dispersion even if a resin having a very high molecular weight or a high melt viscosity is used.
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