A detergent composition

C - Chemistry – Metallurgy – 11 – D

Patent

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C11D 3/20 (2006.01) C11D 3/00 (2006.01) C11D 3/10 (2006.01)

Patent

CA 2261944

A detergent composition comprising a detergent surfactant, a dicarboxylic acid source and an alkaline source wherein said dicarboxylic acid source and alkaline source are capable of reacting together to produce a gas; said dicarboxylic acid source has an effervescence optimum index (EOI) of 4.00, where EOI = [MW x HI] x [10.2-pKa1]-1 x [10.2-pKa2]-1; MW = molecular weight of the dicarboxylic acid of the acid source; HI = hydrophobicity index = ratio of the number of carbon atoms in the chemical formula of the dicarboxylic acid of the acid source : number of oxygen atoms in the chemical formula of the dicarboxylic acid of the acid source; pKa1 is the logarithm of the reciprocal of the dissociation constant of one of the carboxylic acid groups; pKa2 is the logarithm of the reciprocal of the dissociation constant of the second carboxylic acid group; and pKa's 10.20 are not taken into consideration; and the mole ratio of the dicarboxylic acid source to the alkaline source is between 0.005 : 1 and 2.00 : 1; with the proviso that the detergent composition does not contain an alkali metal chloroisocyanurate.

Cette composition de détergence comprend un tensioactif détergent une source d'acide dicarboxylique ainsi qu'une source alcaline, et elle est caractérisée en ce que la source d'acide dicarboxylique et la source alcaline peuvent réagir ensemble afin de produire un gaz. La source d'acide dicarboxylique présente un indice optimal d'effervescence (EOI) ? 4,00, cet indice répondant à la formule: EOI = (MW x HI) x (10,2-pKa¿1?)?-1¿ x (10,2-pKa¿2?)?-1¿, dans laquelle MW représente la masse moléculaire de l'acide dicarboxylique de la source acide, HI représente l'indice d'hydrophobie, lequel correspond au rapport du nombre d'atomes de carbones de la formule chimique de l'acide dicarboxylique de la source acide sur le nombre d'atomes d'oxygène de la formule chimique de cet acide dicarboxylique, pKa¿1? représente le logarithme de la valeur inverse de la constante de dissociation de l'un des groupes de l'acide carboxylique, pKa¿2? représente le logarithme de la réciproque de la valeur inverse de dissociation du second groupe de l'acide carboxylique, les pKa ? à 10,20 n'étant pas pris en considération, et le rapport molaire source d'acide dicarboxylique/source alcaline se situe entre 0,005/1 et 2,00/1, à la condition que la composition de détergence ne contienne pas un chloro-isocyanurate de métal alcalin.

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