MICROCAPSULES HAVING ACRYLIC POLYMERIC SHELLS AND METHODS OF MAKING SAME
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United States of America Patent
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Jun 11, 2015
app pub date -
Dec 5, 2014
filing date -
Dec 6, 2013
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Abstract
Microcapsules are described that include a hydrophobic core material within an acrylic polymeric shell that was polymerized from a monomeric blend that includes a mono-functional acrylic monomer as less than 25% by weight of the monomeric blend and a hyperbranched polyester acrylic oligomer as the balance of the monomeric blend, and methods of making the same. The methods include a two-stage polymerization process where the monomeric blend is polymerized with an azo-initiator in a first stage polymerization reaction and is subsequently further polymerized with a water soluble initiator in a second stage polymerization reaction.
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