Non-molten-mix process for making bar comprising acyl...

C - Chemistry – Metallurgy – 11 – D

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C11D 10/04 (2006.01) C11D 3/22 (2006.01) C11D 17/00 (2006.01) C11D 17/06 (2006.01) C11D 1/12 (2006.01)

Patent

CA 2345343

Detergent bar compositions comprising optional fillers with both soap and high levels of acyl isethionate surfactants are prepared. When high levels of soap and surfactant are normally used in such a process, there is a significant "grittiness" problem. Preprocessing the isethionate containing chip (e.g., "DEFI" chip) has been unexpectedly found to remedy this problem. Preprocessing involves blending of the isethionate with fatty acid soap, optionally surfactant (e.g., betaine) and other minor components using the same process as that used to manufacture final soap (e.g., mixing components at greater than 90 °C for at least 15 minutes, cooling for example on a chill roll, and refining to form chips). The raw material so formed is collected in the form of noodles or chips and then used as the sodium acyl isethionate source in a non-molten process.

On prépare des compositions de barres détergentes contenant des charges éventuelles, ainsi que du savon et des niveaux importants de tensioactifs à base d'acylisethionate. Quand on met en application des niveaux importants de savon et de tensioactif, il en résulte habituellement un problème posé par de grosses particules semblables à du gravier. On a découvert que le traitement préalable des copeaux contenant isethionate (par exemple, copeaux DEFI) apporte une solution positive à ce problème. Ce traitement préalable consiste à mélanger l'isethionate avec un savon à base d'acides gras, éventuellement un tensioactif (par exemple, bétaïne) et d'autres constituants mineurs au moyen du même procédé que celui de la préparation du savon fini (par exemple, mélange des constituants à une température supérieure à 90 DEG C pendant au moins 15 minutes, refroidissement sur un cylindre refroidisseur et raffinage afin d'obtenir des copeaux). On recueille la matière première obtenue sous forme de copeaux ou de boudins fins, puis on l'utilise en tant que source d'acylisethionate de sodium dans un procédé exempt de fusion.

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