Light Duty Dishwashing Liquid

The major uses of linear alkylbenzenes are in the manufacture of linear alkyl sulfonates, LAS, for laundry (70%), light duty dishwashing liquids (15%), industrial cleaners (12%), and household cleaners (3%). 

A commercial manufacturer of light-duty dishwashing liquids used this method to show a liquid detergent composition to have good mildness [75],... 

C in a Terg-o-Tometer. They tested commercial AOS, SAS, AS, and LAS detergents in two formulations one contains surfactant (25%) and sodium sulfate (75%) and is called a light-duty dishwash formulation. The other one contains surfactant (25%), sodium tripolyphosphate (35%), sodium silicate (8%), carboxymethylcellulose (1%), and sodium sulfate (31%), and is called a heavy-duty dishwash liquid. The results in Table 26 show that the AOS-containing formulations have superior performance, followed by SAS, AS, and LAS. 

Economical concentrated ALES base with excellent hard water tolerance. Commonly used in shampoo, bath, and personal care products. Also widely used in light duty cleansers, liquid dishwash, and fabric washes. 

Dishwashing foam stability performance of an LAS-based light-duty liquid (LDL) is strongly affected by the carbon chain distribution, by water hardness, and, under some conditions, by phenyl isomer distribution. Foaming characteristics of C)2 phenyl isomer blends have been reported previously for conditions where LAS is the single anionic surfactant in the formulation (phosphate-built laundry powder) and the level of residual water hardness is low [30,31]. Under these conditions the internal phenyl isomers of C,2 LAS gave better foam performance than the 2-phenyl isomer. 

LDL light-duty liquid or hand dishwashing liquid Pacol a dehydrogenation technology developed by UOP Corporation used in many LAB plants STPP sodium tripolyphosphate... 

Ammonium and alkanolamine alcohol sulfates are used in household formulations in light-duty liquids, manual dishwashing detergents, and liquid house-... 

Alcohol ether sulfates are used in mixture with sulfonates, either alkyl-benzenesulfonates or a-olefinsulfonates, and other surfactants, such as fatty alkanolamides, in manual liquid dishwashing detergents and light-duty detergents. These combinations show the excellent emulsifying and foaming properties required in dishwashing. 

The main performance characteristics of light-duty liquids or dishwash blends are soil emulsification and foaming. Figueroa-Raulli [73] published a comparative study of AOS vs. alkyl sulfates (AS), alcohol ether sulfates (AES), and linear alkylbenzenesulfonates (LAS) in light-duty liquid blends. The blends were evaluated for flash foam, the stability of foam under accumulating soil loads, and for the number of plates washed. Blend performance is expressed as a percentage of a dishwash reference standard. 

The performance of AOS vs. the other surfactants was tested with three foam boosters, namely, amide oxide (AO), lauryl myristic monoethanol amide (LMMEA), and coco diethanolamide (coco DEA) at 90 10 anionic/booster ratio. Blends were evaluated at 0.025% active, 41 °C, and 140 ppm vegetable shortening oil. The results in Fig. 21 show that AOS blends outperform the reference standard whereas the other blends were of equal or less performance. The AOS/LMMEA blend gave superior performance. It was further shown that the addition of a small amount of AES (10% on total actives) further enhanced the performance of the AOS system (see Fig. 22). AOS when formulated with AES and amide therefore has outstanding dishwashing performance and is an attractive candidate for use in formulating light-duty liquids. 

Light Duty Liquid Economy Hand Dishwash... 

Light-Duty Liquids. Light-duty liquids refer to the liquid products sold today primarily for the end application of dishwashing. They can also be used for the washing... 

The situation is different for products designed for light duty, such as for hand dishwashing and softening fabrics. These liquids are generally superior in performance to their powder counterparts to the extent that these existed in the first place. This is also true of shampoo formulations, for which there is no common solid equivalent. 

Light-duty liquid or gel dishwashing detergent compositions having controller pH and desirable food soil removal, rheological, and sudsing characteristics... 

Light-duty or gel dishwashing compositions containing an alkyl ether sulfate-based anionic surfactant, polyhydroxy fatty acid amide nonionic surfactant, suds boosters/stabilizers, aqueous liquid carrier, pH control agent, and acrylic copolymer thickener are disclosed in U.S. Patent 6,274,539. Viscosity as determined... 

Thomas, Gomes, Drapier, Church Colgate-Palmolive Light-duty liquid cleaning compositions especially for dishwashing Contains a water-soluble nonionic surfactant... 

Nguyen, C., Riska, G., Hawrylak, G., and Malihi, F., Characterization of Foam Properties in Light Duty Liquid Dishwashing Products, presented at the AOCS Symposium, Cincinnati, OF1, May 4—7, 1989. 

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