Anionic polymerization in high viscosity dispersing medium to form microparticles with narrow size distribution
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United States of America Patent
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Jul 17, 1990
Issued Date -
N/A
app pub date -
Feb 14, 1989
filing date -
Dec 18, 1987
priority date (Note) -
Expired
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Abstract
The viscosity of the dispersing medium, such as cyclohexane, in the anionic dispersion polymerization of monomers, such as styrene, is increased by adding a higher viscosity inert miscible liquid, such as hexadecane, or a soluble inert solid, or by using a liquid having a viscosity of greater than about 2 cp. The increased viscosity assists in the formation of dispersed polymer particles having a narrower particle size distribution than those produced in the lower viscosity dispersing medium.
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