Process for preparing bead polymers with an average particle size in the range from 1 to 40 .mu.M, moulding compositions comprising bead polymer, and mouldings and PAMA plastisols
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United States of America Patent
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Oct 26, 2004
Grant Date -
Sep 5, 2002
app pub date -
Dec 28, 2001
filing date -
Dec 28, 2000
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Abstract
The present invention provides a process for preparing bead polymers having an average particle size of 1 to 40 .mu.m, which includes: contacting: at least one polymerizable mix which includes at least 50% by weight of at least one (meth)acrylate monomer, at least one aluminum compound, and an aqueous phase, to prepare a mixture; dispersing the mixture at a shear rate.gtoreq.10.sup.3 s.sup.-1 to form a dispersion, wherein the dispersion is stabilized by the aluminum compound; and polymerizing to produce bead polymers having an average particle size of 1 to 40 .mu.m.
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