C - Chemistry – Metallurgy – 11 – D
Patent
C - Chemistry, Metallurgy
11
D
C11D 7/02 (2006.01) C11D 3/08 (2006.01) C11D 3/39 (2006.01) C11D 7/18 (2006.01) C11D 7/20 (2006.01) C11D 11/00 (2006.01) C11D 17/00 (2006.01) C11D 17/06 (2006.01)
Patent
CA 2204383
The invention concerns washing, bleaching and cleaning agent compositions containing coated alkali metal percarbonate, in particular sodium percarbonate, and conventional components of such compositions, including in particular silicate-like builders. Compositions according to the invention, which have good stability during storage yet dissolve rapidly and thus render extension of the washing, bleaching or cleaning period unnecessary, contain an alkali metal percarbonate with an Oa* content in the composition of at least 70 %, a dissolution time of the alkali metal percarbonate in water of less than 10 minutes, determined under specific test conditions in each case, and a morphology index MI greater than 0.03, in particular greater than 0.04, in which: MI = 0.0448 . CV + 3.61 . 106 . d-3; CV = .sigma./d; .sigma. = .SIGMA.(di-d)2.wi/100 and d = .SIGMA.di.wi/100.
L'invention concerne des compositions d'agents de lavage, de blanchiment et de nettoyage, contenant du percarbonate de métal alcalin, en particulier du percarbonate de sodium, et des constituants courants de ces compositions, notamment des adjuvants de type silicate. Ces compositions présentent d'une part une grande stabilité au stockage, et se dissolvent rapidement d'autre part, ne nécessitant donc pas un allongement de la durée de lavage, de blanchiment et de nettoyage. Elles contiennent un percarbonate de métal alcalin présentant un taux en O¿a?* dans la composition inférieur à 70 %, un temps de dissolution du percarbonate de métal alcalin dans l'eau inférieur à 10 minutes, déterminés respectivement dans des conditions d'essai définies, et un indice de morphologie MI supérieur à 0,03, en particulier supérieur à 0,04, avec MI = 0,0448 . CV + 3,61 . 10?6¿ . d?-3¿; CV = .sigma./d; .sigma. = ?.SIGMA.(d¿i?-d)?2¿.w¿i?/100 et d = .SIGMA.d¿i?.w¿i?/100.
Bertsch-Frank Birgit
Bewersdorf Martin
Klasen Claas-Jurgen
Lieser Thomas
Schutte Rudiger
Aktiengesellschaft Degussa
Marks & Clerk
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