The present invention relates to an improved controlled delivery system that can be incorporated in soap bars to enhance deposition of active ingredients and sensory markers onto skin. The carrier system also provides controlled release or prolonged release of these actives from the skin over an extended period of time. The controlled delivery system of the present invention comprises substantially free-flowing, powder formed of solid hydrophobic, positively charged, nanospheres of encapsulated active ingredients, that are encapsulated in moisture sensitive microspheres. The high cationic charge density of the nanosphere improves deposition of active ingredients onto skin. The high cationic charge density on the nanosphere surface is created by incorporating a cationic conditioning agent into the solid hydrophobic matrix of the nanospheres, by incorporating a cationic charge “booster” in the moisture sensitive microsphere matrix, or by using a cationic conditioning agent in the nanosphere matrix in conjunction with a cationic charge “booster” in the microsphere matrix. The invention also pertains to soap products comprising the controlled release system of the present invention.
本发明涉及一种改进的可控给药系统,可将其加入肥皂条中,以增强活性成分和感官标记在皮肤上的沉积。该载体系统还能使这些活性成分在较长时间内从皮肤中控制释放或延长释放时间。本发明的控释系统包括基本自由流动的粉末,由固态疏
水性、带正电荷、封装活性成分的纳米球组成,这些纳米球封装在湿敏微球中。纳米球的高阳离子电荷密度提高了活性成分在皮肤上的沉积效果。纳米球表面的高阳离子电荷密度是通过在纳米球的固态疏
水基质中加入阳离子调节剂,在湿敏微球基质中加入阳离子电荷 "增效剂",或在纳米球基质中使用阳离子调节剂的同时在微球基质中使用阳离子电荷 "增效剂 "而产生的。本发明还涉及包含本发明控释系统的肥皂产品。