Soil-release agents

Early soil-release agents, applied particularly to resin-finished cellulosic goods, were water-soluble polymers, many being related to thickeners (section 10.8) such as starch, hydroxypropyl starch, sodium carboxymethylcellulose, methylcellulose, hydroxyethyl-cellulose, alginates, poly(vinyl alcohol) and poly(vinylpyrrolidone). These functioned essentially as temporary barriers and preferential reservoirs for soil, which was thus easily removed along with the finish in subsequent washing, when they then helped to minimise... 

Essentially nonionic soil-release agents comprise polyesters, polyamides, polyurethanes, polyepoxides and polyacetals. These have been used mainly on polyester and polyester/ cellulosic fabrics, either crosslinked to effect insolubilisation (if necessary) or by surface adsorption at relatively low temperature. Polyester soil-release finishes have been most important, particularly for polyester fibres and their blends with cellulosic fibres. These finishes, however, have much lower relative molecular mass (1000 to 100 000) than polyester fibres and hence contain a greater proportion of hydrophilic hydroxy groups. They have been particularly useful for application in laundering processes. These essentially nonionic polymers may be given anionic character by copolymerising with, for example, the carboxylated polymers mentioned earlier these hybrid types are generally applied with durable press finishes. 

Polyfluorinated chemicals now dominate in the fields of oil-repellent and water-repellent finishes. The earlier so-called conventional polyfluorinated products were of the type represented by poly(N-methylperfluoro-octanesulphonamidoethyl acrylate) (10.248) [499]. Such products presented a shield of closely packed fluoroalkyl groups at the fibre-air interface, thus giving low-energy surfaces with excellent oleophobicity. These showed excellent resistance to oil-based stains but were less satisfactory as soil-release agents during... 

Soil Antiredeposition Agents, Soil Repellent/Soil Release Agents... 

E. Gosselink, Soil release agents in powdered detergents, in M. S. Showell, (ed.), Powdered Detergents, Marcel Dekker, New York, 1998. 

Additional components of the dryer sheet formula can include perfumes for marketing and soil release agents to prevent soiling of fabric during the use period prior to the next washing [43]. 

Other fabric properties that are enhanced by soil-release finishes include protection from soil redeposition during laundering and absorbency or transport of liquid water. Fabrics with increased absorbency provide garments that feel more comfortable under hot, humid conditions, thus leading the name comfort finish that has often been applied to fabrics treated with soil-release agents. 

The procedure given in AATCC Test Method 79 can also be used to determine the degree of absorbency of fabrics finished with soil-release agents. Typically, near instantaneous wetting of the fabric with water (< 1 s) is expected from nonfluorine-containing soil-release finishes. 

Soil release extender. Nonionic stabilizer and unique extender for fluorochemical soil release agents. Used on upholstery, darpery, and apparel fabrics. Reduces fluorochemical consumption by 50%. 

PRYM 49 is a very effective soil release agent by itself and works very well as an extender with fluorochemical stain release products. Although particularly suitable for post cure permanent press use, it is also effective in precure applications. 

Minimizes amounts of fluorochemical soil release agent needed... 

Fatty alcohol (co-softener), fatty acid ester (co-softener), fatty amides (co-softener), amido amines (co-softener), polyethylene terephthalate (soil release agent), PVP-type polymers, (dye transfer inhibitor)... 

The use of soil release agents in liquid laundry detergents is meant to address some of these issues [133], These ingredients are usually polymeric and are composed of hydrophilic as well as hydrophobic segments. The hydrophobic functionality of the polymer allows it to be deposited and remain adsorbed onto the... 

The concept of polymeric soil release agents has been around for well over 25 years. The initial polymer chemistries (polyethylene terephthalate-polyoxyethylene terephthalate, PET-POET) were designed to deposit on fabrics and facilitate oily soil removal upon subsequent washing [98,133,134], The limitation of this chemistry was its effectiveness on synthetics (polyester) alone, with limited benefits being observed on cotton and synthetic blends. In recent years the focus has shifted to delivering soil release on cotton. Two classes of polymer chemistries have been disclosed in the recent patent literature for cotton soil release one based on hydrophobically modified polycarboxylates derived from acrylic acid and hydrophobic comonomers at defined molar ratios [188] and the other based on modified polyamines [189-193],... 

Adsorption in similar fashion of other bath components onto the substrate or soil can also produce electrical and steric barriers to the close approach of soil particles to the substrate, thus inhibiting or preventing the redeposition of soil particles. Special components, called soil release agents or antiredeposition agents, are often added to the bath for this purpose. These are generally polymeric materials that by adsorption onto the fabric or soil produce a steric and sometimes also an electrical barrier to the close approach of soil particles (Trost, 1963). 

Uses Soil release agent in rug shampoos paper sizing and coatings commercial laundries emulsion polymerization oven cleaners leveling... 

Textile warp sizing resins, soil release agents, and such, may be made from SMA Intermediate sizing of this type... 

Printing paste dispersant—textile paper coatings Textiles soil release agent Soil-repellent finishes polyester fiber... 

Chem. Descrip. Proprietary polymer Uses Surface modifier, soil release agent for hard surface cleaners Features Not compat, with anionic surfactants compat. with common nonionic, cationic, amphoteric surfactants... 

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