Layered silicates have long been used in automatic dish detergent applications for suspension and stability control agents, and for anti-spotting action.
High yield stress clays (Laponite®, Mineral Colloid, Gelwhite and Optigel (EU)) provide suspension of the silicate and other inorganic solids to ensure a homogeneous formulation. The clays can function synergistically with Xanthan Gum or synthetic polymers to improve efficiency.
It is well known in the dishwashing art that the visual appearance of the cleaned article is a critical factor for a dishwashing composition to be satisfactory to the consumer. Frequently, after cleaning of an article a film is formed thereon, which results in the article showing a dull surface when dry, or spots are formed on an article after drying, both phenomena causing the article to have an "unclean" visual appearance. By virtue of high surface energy, the deposition of clay on glass, plastic or porcelain will result in a low water contact angle. This low water contact angle will lead to spreading or sheeting and therefore the minimization or elimination of water spots. This benefit can be achieved from a traditional powder, gel or the newer generation PVA pouch delivery.
As with the laundry application, Laponite® can serve as a tablet disintegrant for bleach based tabs. The hydration of Laponite®, even in a salt laden environment, will lead to enough physical expansion to break apart the tablet or pill. Laponite® will also avoid the tablet hardening that might reduce the rate or extent of disintegration typical of many polymeric agents.
Formularies - Select below.
liquid automatic dishwashing detergent