Foam Powdered Laundry Detergent

Uses Used in alkaline, low foam powdered laundry, and all purpose detergents metal cleaners and brighteners detergent sanitizers hard surface, floor, waterless hand and acid tile cleaners xylene emulsifier emulsion polymerization pesticide emulsifier food-pkg. adhesives, paper, polymers defoamer in food-contact paper/paperboard emulsifier in mfg. of food-contact articles Regulatory FDA 21CFR 172.710,175.105,176.180,176.210,178.3120, 178.3400 DOT nonregulated... 

The monoethanolamides are not soluble in water and are hard waxy solids, which render them useful in laundry detergent powders since they give easier flowing powders than the sticky diethanolamides and improve the foam and foam stability properties. The simple chemistry is given below ... 

In this book we introduce major techniques used in designing and developing, roughly in the sequence in which they will be used. We show how techniques have been used (or could have been used) in a variety of products a laundry detergent, insulated windows, toothpaste, anti-fouling paint, an insulin injector, a powder coating, a box of matches, herbicide capsules, foamed snacks, a pharmaceutical tablet. Rockwool insulation, a ballpoint and a methanol catalyst. The authors have been involved in the development of several of these products. 

The LAS/AS and LAS/AS/AES combinations used in some U.S. spray-dried laundry powders for more than 30 years have provided good detergency with moderate to high foaming performance [39]. A typical example of a low-density, spray-dried, high-foaming laundry powder is shown below ... 

As in the example of the detergent formulation used to obtain the foam profiles shown in Figure 8.4, early attempts to develop praetieal washing powder formulations suitable for foam-intolerant, front-loading drum-type laundry washing machines utilized the antifoam effect of calcium soaps in mixed anionic and ethoxylated alcohol surfactant systems. The approach appears to have been entirely empirical. The foam behavior of ternary mixtures of anionie surfaetants, sueh as sodium alkylbenzene sulfonates, various ethoxylated alcohols, and soaps, was optimized for low foamabil-ity in relevant machines by systematie trial. Obviously, polyvalent metal ion (especially calcium) activity as determined by temperature, water hardness, and builder type and concentration represented an additional variable. Wash temperature and pH... 

---