Patent ID: 6585986
Filing Date: 2003-07-01
Classification: A61K,A61Q,C09K

Abstract:
A gelation agent obtained by mixing a water swelling clay mineral with a quaternary ammonium salt cation surfactant, said water swelling clay mineral comprising a colloidal hydrated aluminum silicate with a three-layer structure represented by the following formula:(X, Y)2&square;3(Si, Al)4O10(OH)2Z1/3&square;nH2O wherein X is Al, Fe(III), Mn(III), or Cr(III); Y is Mg, Fe(II), Ni, Zn, Li, or Mn(II); Z is K, Na, 1/2Ca, or 1/2Mg; and n is a natural number greater than 0; and said quaternary ammonium salt cation surfactant is represented by the following formula: where R1 denotes a benzyl group or alkyl group with a carbon number of 10-22, R, denotes a methyl group or alkyl group with a carbon number of 10-22, R3 and R4 are hydroalkyl groups or alkyl groups with a carbon number of 1-3, and X denotes a halogen atom or methyl sulfate residue, and a fatty acid which is liquid at normal temperatures, said quaternary ammonium salt cation surfactant being present in an amount of 60-140 milli-equivalents for 100 g of said water swelling clay, and said fatty acid being present in an amount of 1-300 g for 100 g of water swelling clay mineral.