Patent ID: 8304379

Claim:
A powdered solidified detergent composition characterized in that the composition comprises a solution of (a) a silicon-containing compound and (b) at least one surfactant, the silicon-containing compound being represented by the following general formula (1): wherein R 1 is a hydrocarbon group having 6 or more carbon atoms, R 2 and R 3 are each a lower hydrocarbon group having 1 to 6 carbon atoms which may be the same or different from each other, R 4 is a bivalent lower hydrocarbon group having 1to 6carbon atoms, R 5 , R 6 and R 7 are each a lower alkyl group or lower alkoxy group having 1to 6 carbon atoms which may be the same or different from each other, X is a halogen ion or organic carbonyloxy ion and the surfactant being selected from the group consisting of (b1) a cationic surfactant but excluding the above silicon-containing compound and (b2) a nonionic surfactant, the cationic surfactant (b1) is a cationic surfactant (b11) represented by the following general formula (2) wherein R 11 is a hydrocarbon group having 6 or more carbon atoms, R 12 , R 13 and R 14 are lower hydrocarbon groups having 1 to 6 carbon atoms which may be the same or different from each other, Y is a halogen ion, an organic carbonyloxy ion, or an N-cocoyl-arginine ethyl ester pyridone carboxylate salt (b12), the above nonionic surfactant (b2) is at least one nonionic surfactant selected from the group consisting of an alkyl ether or fatty acid ester of polyoxyalkylene glycol containing polyoxyethylene unit and/or polyoxypropylene unit, a sorbitan fatty acid ester and fatty acid monoglyceride, wherein said composition is characterized in that the composition is dissolvable in water and wherein the silicon-containing compound or the composition comprising a silicon-containing compound and at least one surfactant is a reduced-pressure dried substance, and the reduced-pressure drying of the substance is performed at a temperature of from −30° C. to −60° C.