Patent ID: 7128901
Filing Date: 2006-10-31
Classification: A45D,A61K,A61Q

Abstract:
1. A process for forming a free standing antiperspirant or deodorant solid stick product using particulate and fluid materials that are combined by means of amalgamation, homogenization, compaction and extrusion at a temperature below the melting temperature of said product and extruded by mechanically working the particulate and fluid materials, wherein the process comprises the steps of: (A) selecting a mixture of particulate and fluid materials as: (a) 16–35 weight % volatile and non-volatile silicone, provided that the composition contains at least about 16 weight % volatile silicone; (b) 10–30 weight % of a structuring agent with a melting point ≦80° C. selected from the group consisting of C16–20 fatty alcohols; C16–C22 fatty acids with or without an hydroxy substitution; C16–C22 fatty ethers; waxes with a melting point ≦80 degrees C.; paraffins having a melting point of less than 80 degrees C.; glycerin; vegetable oils; hydrogenated oils; and mixtures of any of the foregoing sufficient to form a stick product having a hardness of 50–90 Dietert Green hardness units, on a B scale; (c) 8–30 weight % a particulate material having a particle size less than 10 microns and selected from the group consisting in type and amount of 8–20 weight % talc; 8–20 weight % clays; 8–20 weight % zeolites; 1–12 weight % superabsorbent having little or no tack upon wetting; 1–8 weight % low melting point polyethylene; (d) an effective amount of an antiperspirant active ingredient sufficient to provide a deodorant and/or an antiperspirant; and (e) Optionally 2.5–5 weight % Japan wax; and (B) performing a process comprising the steps of: (a) mixing and combining the structuring agents into a well mixed blend of solids; (b) feeding the mixture into a first homogenizing means; (c) homogenizing the mixture; (d) mixing the homogenized mass with particulate, active, fragrance and any other remaining ingredients in a second mixing means; (e) homogenizing the mixture of (d) using a second homogenizing means; (f) extruding the complete mixture to obtain a uniform, solid, cohesive extrudate; and (g) cutting the extrudate into billets of a selected length; and (h) forming unit products.