Patent ID: 6703012
Filing Date: 2004-03-09
Classification: A61L,C08K

Abstract:
A process for forming a toilet block for use in a toilet bowl consisting essentially of the sequential steps of:(i) extruding polyvinyl alcohol or 50-90% partially hydrolyzed polyvinyl acetate having a number average molecular weight of from about 15,000 up to about 68,000 and containing 0-15% by weight polar plasticizer to form an extrudate which is water-soluble at a temperature in the range of 25-35Â° C.; (ii) chilling and pelletizing the resulting extrudate at a temperature in the range of from about 5Â° C. up about 60Â° C.; (iii) cryogenically grinding the resultant pelletized product at a pressure in the range of from about 1 atmosphere up to about 50 atmospheres to a particle size in the range of from about 10 up to about 500 microns to form cryogenically-ground particles; (iv) subsequently comminuting the resulting cryogenically-ground particles in order to form a powder; (v) mixing the resulting powder with: (a) from 1 up to about 20% by weight of a compatible fragrance comprising a major proportion of at least one highly polar organic primary alcohol; (b) at least one compatible sulfonate or sulfate-containing surfactant having both detergent and foaming properties; and (c) from 25 to 45% by weight of a water-soluble filler selected from the group consisting of alkali metal bicarbonates, alkali metal sulfates, alkali metal carbonates, alkali metal citrates, alkali metal phosphates and sodium chloride; and then (vi) molding the resultant mixture into a toilet block.