Co-granules and detergent tablets formed therefrom

Details Co-granules and detergent tablets formed therefrom Co-granules and detergent tablets formed therefrom

C - Chemistry, Metallurgy

11

D

C11D 3/20 (2006.01) C11D 3/37 (2006.01) C11D 3/386 (2006.01) C11D 3/395 (2006.01) C11D 11/02 (2006.01) C11D 17/00 (2006.01) C11D 17/06 (2006.01)

Patent

CA 2180433

A homogenous co-granule comprising a salt of a di-, tri- or tetracarboxylic acid and an inorganic acid salt. The salt of a di-, tri- or tetracarboxylic acid is preferably an alkali metal citrate or an alkali metal oxydisuccinate. The inorganic salt is preferably alkali metal silicate, in particular sodium disilicate or sodium silicate with a composition satisfying SiO2 : Na2O = 1.0 - 33, ideally 1.8 - 2.3. The co-granule preferably also comprises at least one polymeric compound, being either acid and/or salt, selected from polycarboxylic acid and polypeptides. The invention also provides detergent compositions and tablets comprising these co-granules. The invention further provides the use of said detergent compositions and tablets in a mechanical dishwashing process.

L'invention concerne des co-granulés homogènes comprenant un sel et un acide di-, tri- ou tétracarboxylique et un sel inorganique. Le sel d'un acide di-, tri- ou tétracarboxylique est de préférence un citrate de métal alcalin ou un oxydisuccinate de métal alcalin. Le sel inorganique est de préférence du silicate de métal alcalin, notamment du bisilicate de sodium ou du silicate de sodium, avec une composition satisfaisant à SiO¿2?: Na¿2?0 = 1,0 - 3,3, idéalement 1,8 - 2,3. Les co-granulés comprennent également de préférence au moins un composé polymère (un acide et/ou un sel), sélectionné dans les polymères d'acide polycarboxylique et les polypeptides. L'invention concerne également des compositions et des pastilles détergentes qui comprennent des co-granulés. L'invention concerne par ailleurs l'utilisation desdites compositions et pastilles détergentes dans un processus de lavage mécanique de la vaisselle.

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