Foam regulators

Foam-injection molding Foam plastic sheathing Foam products Foam regulators Foam rheology... 

Foam regulators such as amine oxides, alkanolamides, and betaines are present in products where high foam value is functionally or estheticaHy desirable, mainly hand-dishwashing Hquids and shampoos. In automatic dishwashing products, on the other hand, copious foam volumes interfere with the efficiency of the mechanical rotors during operation. In this type of product, a foam depressant is often present. 

Intensive investigations have shown that specific silica-silicone mixtures or paraffin oil systems are considerably more universal in their applicability and that their effectiveness is independent of both water hardness and the nature of the surfactant-builder system employed [31-33]. Therefore, most heavy-duty detergents in Europe have silicone oil and/or paraffins as foam depressors. Soap has almost lost its importance as a foam regulator. Silica-silicone systems, frequently called silicone antifoams, are usually commercially available as concentrated powders. The key silicone oils used for antifoams are dimethylpolysiloxanes. 

Foam products Foam regulators Foam rheology... 

Liquid products are approximately 50 to 60 percent water, with the remainder being a combination of surfactants, builders, foam regulators, enzymes and enzyme stabilizers, hydrotropes, antiredeposition polymers, optical brighteners, corrosion inhibitors, dye, and perfume. Two-in-one formulations also contain antistatic and fabric softening ingredients. Liquid systems require careful selection and blending of raw materials to achieve a stable product. Special attention is necessary for the following items. 

LASs were found to possess interesting foaming characteristics, which are very significant for their application as detergents. However, LAS can be controlled by foam regulators. Also, the foam produced is stabilized by form stabilizers. The basic processes have been applied for the manufacture of LAS. The dehydrogenation of paraffins, followed by alkylation of benzene with a mixed olefin or paraffin feedstock, represents the most important route for the production of LAS. This process is catalyzed by hydrogen fluoride (HF) [1—4]. 

Phenolic foams can also be prepared without the use of CFG or hydrocarbon blowing agents. In a typical preparation [37], resol 200, ethoxylated castor oil 8, boric anhydride accelerator 36, and SnCl2.2H20 36 parts are mixed and heated for about 4 minute at 120°C to obtain a foam having density 0.003 g/cm and 29% closed cells. In another method [38], 1 mol phenol, 2.6 mol formaldehyde, and 5% dimethylaminoethanol are heated at 70°C-100°C for 4 h to obtain a liquid (70%-80% solids content) which is mixed with 2%-3% silicone foam regulator and 5 parts NaHCOs. Toluenesulfonic add (20 parts, 80% aq.) is then added to obtain a stable rigid foam. 

Different formulations plus soil antiredeposition agents, enzymes, FWAs, foam regulators, soil repellents (or others) VG VG VW N... 

Foam regulators Ensure the desired foam characteristics Fatty acid amines Betaines ... 

Uses Detergent, foam regulator in low-foam formulations, automatic dishwashing, industrial cleaners... 

Additional ingredients include enzymes, soil anti-redepositioning agents, foam regulators and fragrances. 

Foam regulators ( defoamers and foamers) are important ingredients of d. In the early days of d. use, foam was understood to be an indicator for washing power and is still seen that way today. Foam boosters, based on - fatty acid amides, ->fatty acid ethanolamides, ->betains... 

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