Active agent microparticles

摘要

The present invention concerns polymeric-enveloped microparticles including at least one HASE type acrylic copolymer, at least one solid-liquid phase change material with a phase transition temperature ranging from 20 to 90° C., and at least one active agent. In particular, the microparticles include at least one HASE type acrylic copolymer including at least one anionic monomer with a polymerizable vinyl group and a carboxyl group, at least one non-ionic hydrophobic monomer with a polymerizable vinyl group, and at least one alkoxylated associative macromonomer with a polymerizable vinyl group and a hydrophobic hydrocarbon chain.

主权项

1. Polymeric-enveloped microparticles, comprising:
a) 1 to 20% by weight of an acrylic copolymer of HASE type, the acrylic polymer comprising in polymerized form:
an anionic monomer with a polymerizable vinyl function and a carboxyl group;a non-ionic hydrophobic monomer with a polymerizable vinyl function; andan alkoxylated associative macromonomer with a polymerizable vinyl group and a hydrophobic hydrocarbon chain; b) 4 to 95% by weight of a solid-liquid phase change material with a phase transition temperature ranging from 20 to 90° C., the solid-liquid phase change material being at least one of a natural wax and a synthetic wax; and c) 4 to 95% by weight of an active agent which is a fragrance or odorous molecule or an agrochemical active ingredient; wherein the microparticles have controlled mechanical strength and provide controlled release of the active agent.