Denture cleanser

Claim 1

A thermogenic denture cleansing composition in powder or granular form comprising (a) 60 to 85 wt % of an approximately stoichiometric mixture of (1) an oxidizing agent selected from the group consisting of alkali metal percarbonate, perborate, persulfate, perpyrophosphate and monopersulfate, and (2) a reducing agent selected from alkali metal sulfite, thiosulfite or metabisulfite; thiourea; and ascorbic acid, (b) 5 to 15 wt % of a bleaching agent selected from the group consisting of alkali metal monopersulfates, said 5 to 15 wt % of alkali metal monopersulfates being in addition to any alkali metal monopersulfate used as an oxidizing agent, (c) 0.01% to 5.0 wt % of a wetting agent selected from alkali metal salts of long chain alkyl sulfates, alkali metal salts of alkyl benzene sulfonates and nonionic surfactants that are stable to oxidants at a pH of 7 to 10, (d) 0.01% to 0.5 wt % of a sequestering agent selected from alkali metal salts of aminocarboxylic acids, and (e) sufficient pH adjusting agent to give the composition, when in aqueous solution, a pH of 7-10.