Acylated protein hydrolysates, surfactants

Acylated Protein Hydrolysates. These surfactants are prepared by acylation of proteia hydrolysates with fatty acids or acid chlorides. The hydrolysates are variable ia composition, depending on the degree of hydrolysis. CoUagen from leather (qv) processiag is a common proteia source. Acylated proteia hydrolysates (Maypoa, by laotex Chemical Company) are mild surfactants recommended for personal-care products (see Cosmetics). 

In the development of the protein-fatty acid condensates it was possible to combine the renewable resources fatty acids (from vegetable oil) and protein, which can be obtained from both animal waste (leather) as well as from many plants, to construct a surfactant structure with a hydrophobic (fatty acid) and a hydrophilic (protein) part (Fig. 4.12). This was carried out by reacting protein hydrolysate with fatty acid chloride under Schotten-Baumann conditions using water as solvent. Products are obtained that have an excellent skin compatibility and, additionally, a good cleaning effect (particularly on the skin) and, in combination with other surfactants, lead to an increase in performance. For instance, even small additions of the acylated protein hydrolysate improve the skin compatibility. An... 

Acylated Protein Hydrolysates. These surfactants are prepared by acylation of protein hydrolysates with fatty acids or acid chlorides. 

Acylated protein hydrolysates are mild surfactants recommended for personal-care products. 

Acylated protein hydrolysates are known to be very mild surfactants. In the formulation of surfactants, the addition of small amounts of acylated protein hydrolysates to the more strongly irritating bulk surfactants results in a more than proportional improvement in their compatibility with the skin [10]. 

This surfactant category represents the quaternized acyl protein hydrolysates, combining the care effects of the cationic substances with the positive dermatological effects of the protein derivatives and making them valuable for personal care products. 

Cocoyl hydrolyzed soy protein Synonyms Soya protein hydrolysates, reaction prods, with coco-acyl chloride Definition Condensation prod, of coconut acid chloride and hydrolyzed soy protein Uses Antistat, surfactant, hair conditioner in cosmetics, hair care, skin care Trade Name Synonyms Oleo-Soy C J[Arch Personal Care Prods. http //www. archchemicals, com]... 

Amino acid-based surfactants are derived from simple amino acids or mixed amino acids from synthesis or protein hydrolysates. They are composed of amino acid as the hydrophilic part and a long hydrocarbon chain as the hydrophobic part. The hydrophobic chain can be introduced through acyl, ester, amide, or alkyl linkage. Interest in amino acid surfactants is not new, as shown by early work in the area. In 1909, Bondi performed the first research on the introduction of a hydrophobic group to obtain A-acylgiycine and A-acyla-lamine [18], Subsequent work in this area focused on A-acylamino acids, as reported by Funk [19], Izar [20], Karrer [21], Staudinger and Becker [22],... 

Two approaches were used for the synthesis of amino acid surfactants. One was to react protein hydrolysates with alkyl acyl chloride, followed by purification and neutralization with alcoholic sodium hydroxide. The other... 

Hocker et al. [137] synthesized anionic A-acylated L-amino acids, oligopeptides, and protein hydrolysates and studied the adsorption on wool. Increased bath exhaustion and a more intense coloration of wool were obtained during dying of wool by the addition of the studied amino acid surfactants. These surfactants exhibited good biodegradabilities with 68-78% BOD5/COD. 

The use of proteins as raw material for personal and home care products has been known for more than 60 years [58]. Both animal (e.g. leather waste) and plant-based proteins are available as raw materials. Nowadays mostly plant-based proteins (e.g. from wheat, soya bean, rice, peas) are used. Typically the natural proteins are degraded by hydrolysis (either chemically or enzymatically) and the respective protein hydrolysates are obtained. After purification and work-up they are used for skin and hair care formulations. The main claims are protection and care for hair and skin. Subsequent quarternization of the protein hydrolysates leads to products with high substantivity and conditioning effects, whereas acylation of the protein hydrolysates with fatty acids results in protein surfactants, the so-called protein fatty acid condensates. In the latter case, as already described for the sugar-based surfactants, the products are based completely on natural raw materials, namely fatty acids (from vegetable oil) and the protein or protein hydrolysate as the hydrophilic part in the surfactant molecule (Figure 4.6). The... 

It is our opinion that progress has been slow in developing commercial PBS for food applications. Acylation processes (acetylation and succinylation) have been applied successfully to some extent to improve the functionality of proteins or their hydrolysates. What seem to be needed now are novel approaches (chemical or enzymatic) to develop new surfactants with enhanced surface activity and utility for food applications. The trend toward safer emul-... 

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