Patent ID: 6060444
Filing Date: 2000-05-09
Classification: C11D

Abstract:
A homogeneous, non-caustic, solid block cleaning composition, produced by a process comprising the steps of:(a) mixing in an extruder at high shear to provide a substantially homogeneous fluid mixture which contains an effective amount of a hardening agent selected from the group consisting of a mixture of a solid polyethylene glycol having a molecular weight of 3000 to 100,000 and anhydrous sodium carbonate; a sequestering agent selected from the group consisting of phosphates, phosphonates and mixtures thereof; and a cleaning agent comprising an alkali metal compound and 30 to 95 wt % of a nonionic surfactant, in a continuous mixing system below the melting temperature of the cleaning agent; and(b) removing shear from the mixture and continuously discharging the mixture from the system, causing the mixture to harden to a solid composition.