Cleaning implement with erodible foam substrate and controlled release system of active agent
AssigneeThe Procter & Gamble Company
InventorsDenis Alfred Gonzales, Iris Bogaerts, Vincenzo Tomarchio
Life of this patent
Estimating the term…
Abstract
A cleaning implement comprises an erodible foam substrate, such as a melamine foam substrate and a controlled release system comprising an active agent. The controlled release system comprises a component selected from the group consisting of a polymer matrix, a microcapsule, a particulate porous carrier, a complexing agent, a semi-permeable film and a combination thereof and the active agent is selected from the group consisting of a surfactant, a bleaching agent, a limescale reducing agent, a biocide, a solvent and a mixture thereof.
Claims8
A cleaning implement, comprising four layers of substrate in a sandwiched configuration, wherein an erodible foam substrate is positioned as both of the outside layers attached to two middle layers by adhesion, wherein
- (a) the erodible foam substrate comprises from about 5% to about 20% by weight of an active agent in free form;
- and
- (b) an aqueous controlled release system comprising:
- (i) a remainder of said active agent, and
- (ii) a hotmelt polymer matrix consisting essentially of an effective amount of water-soluble polyethylene glycol having an average molecular weight in the range of from 1,500 to 9,000 g/mol,
- wherein said active agent is selected from the group consisting of a surfactant, a bleaching agent, a limescale reducing agent, a biocide, a solvent, and a mixture thereof and is released from said controlled release system by an activation means selected from the group consisting of:
- water activation, degradation, friction, and combinations thereof, wherein the aqueous controlled release system is applied in-between the two middle layers.
Dependencies are inferred from the claim text.