A multi-phase detergent tablet

C - Chemistry – Metallurgy – 11 – D

Patent

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Details

C11D 17/02 (2006.01) C11D 3/12 (2006.01) C11D 3/22 (2006.01) C11D 3/37 (2006.01) C11D 17/00 (2006.01) C11D 1/72 (2006.01)

Patent

CA 2337401

A multi-phase detergent tablet for use in a washing machine, the tablet comprising a first phase in adhesive contact with one or more second phases, at least one second phase being in the form of a compressed particulate solid incorporating liquid adhesive and having an average porosity of less than about 0.15 ml/g. The liquid adhesive is preferably selected from polyethylene glycols having an average molecular weight in the range from about 200 to about 700 and is preferably applied by post-addition to the particulate solid prior to compression. The multi-phase tablets provide improved interphase adhesivity, robustness and strength together with excellent dissolution and cleaning characteristics.

L'invention porte sur des pastilles détergentes multiphases pour machines à laver comprenant une première phase adhérant à une ou plusieurs phases, l'une des deuxièmes phases étant sous la forme d'un solide de particules comprimées incorporant un adhésif liquide et présentant une porosité moyenne de inférieure à environ 0,15 ml/g. Ledit adhésif liquide est de préférence choisi parmi des polyéthylèneglycols d'un poids moléculaire moyen compris entre 200 et 700, et qui s'applique de préférence par post addition au solide de particules avant la compression. Les pastilles multiphases se caractérisent par leur adhérence entre phases améliorée, leur solidité, leur résistance, ainsi que par une dissolution et un pouvoir détergent élevés.

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