Polymer particles of controlled shape
First Claim
1. A method for the preparation of polymer particles comprising the steps of:
- a) forming an organic phase by dissolving a polymer material in a solvent;
b) dispersing the organic phase in an aqueous phase comprising a particulate stabilizer and homogenizing the resultant dispersion, thereby forming spherical particles having a selected particle size and uniform particle size distribution;
c) following the homogenizing, adding a particle shape-modifying surface active material to the spherical particles; and
d) removing the solvent, thereby producing irregularly shaped polymer particles having substantially the same selected particle size and particle size distribution as that of the spherical particles.
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Abstract
A method for the preparation of polymer particles comprising the steps of: a) forming an organic phase by dissolving a polymer material in a solvent; b) dispersing the organic phase in an aqueous phase comprising a particulate stabilizer and homogenizing the resultant dispersion, thereby forming spherical particles having a selected particle and uniform particle size distribution; c) following the homogenizing, adding a particle shape-modifying surface active material to the spherical particles; and d) removing the solvent, thereby producing irregularly shaped polymer particles having substantially the same selected particle size and particle size distribution as that of the spherical particles.
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Citations
21 Claims
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1. A method for the preparation of polymer particles comprising the steps of:
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a) forming an organic phase by dissolving a polymer material in a solvent;
b) dispersing the organic phase in an aqueous phase comprising a particulate stabilizer and homogenizing the resultant dispersion, thereby forming spherical particles having a selected particle size and uniform particle size distribution;
c) following the homogenizing, adding a particle shape-modifying surface active material to the spherical particles; and
d) removing the solvent, thereby producing irregularly shaped polymer particles having substantially the same selected particle size and particle size distribution as that of the spherical particles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification