Method of transferring latex particles from an aqueous to an organic phase and making an impact resistant acrylic sheet
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United States of America Patent
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Jan 28, 1992
Issued Date -
N/A
app pub date -
Oct 10, 1989
filing date -
Mar 21, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Impact resistant compositions are prepared by the incorporation of acrylic rubber particles (or multi-stage emulsion polymer particles containing a rubbery layer) in a predominantly methyl methacrylate matrix. The emulsion particles are prepared in water as a latex stabilized with anionic groups. The particles are transferred to a methyl methacrylate medium by destabilizing the latex with a quaternary ammonium salt and optionally a di- or multivalent inorganic salt. Impact resistant compositions are prepared by separating the water from the methyl methacrylate layer and polymerizing the methyl methacrylate.
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