| 摘要 |
PURPOSE: Provided are a triggered response composition and a process for triggering the release of active ingredients to an aqueous system, which deliver or offer controlled release of one or more active ingredients/beneficial agents to an environment of use. CONSTITUTION: The triggered response composition comprises one or more polyelectrolytes in contact with an aqueous system that is stable and insoluble in an aqueous system at relatively high ionic strength and basic strength and that exhibits one or more chemical/physical responses selected from dispersing, disintegrating, dissolving, destabilizing, swelling, deforming, softening, flowing and combinations thereof; wherein the chemical/physical response of the composition is triggered upon one or more ionic strength and basic strength changes to the aqueous system. The polyelectrolyte is one or more alkali soluble polymers comprising: (a) 15-70 wt% of one or more acidic monomers; (b) 30-95 wt% of one or more non-ionic vinyl monomers; and, optionally (c) 0.01-5 wt% of one or more metal cross-linking agents.
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