Surfactants cocoamidopropyl betaine

Alkanolamides Alkyl sulfonates Amine oxides Amphoteric surfactants Anionic surfactants Cocoamidopropyl betaine Betaine derivatives Amido guanidines Disulfonates... 

Five amphoteric surfactants (cocoamidopropyl betaine, cocoamidopropyl sultaine, lau-roamphoglycinate, dihydroxyethyl tallow glycinate and isostearoamphopropionate) were separated by reversed-phase LC. According to the anthors (Cozzoli et al, 1989), this method could be applied to cosmetic matrices. Tegeler et al (1995) set out to determine amphoteric surfactants in typical cleansing formulation, which could contain anionic (e.g. alkyl ether... 

Amphoteric surfactants, in particular betaines, especially cocoamidopropyl betaine, typically provide synergistic benefits with anionic surfactants [18]. Similar to the benefits of amine oxides, they have been found to mitigate the inherent... 

Cocoamidopropyl betaine (CAS No 61789-40-0) is an amphoteric surfactant that contains both cationic amine and anionic carboxylate groups in one molecule. Some of the synonyms used for cocoamidopropyl betaine in the literature and trade industry are given in Table 8.5, along with the structural formula. 

An extension of the soap-coactive approach has been the production of ultra-mild bars which contain only low levels of soap, with the primary surfactant being a synthetic anionic. The first product of this type was Dove, which contained sodium cocoyl isethio-nate as the primary surfactant More recently modified versions of this formulation have appeared containing milder coactives (e.g., cocoamidopropyl betaine) and an emollient such as stearic acid (32). Such benefits come at a cost to the consumer because these materials are considerably more expensive than simple soaps. Attempts to extend this approach using alternative synthetic anionic surfactants have been less successful. This is mainly due to the poor crystallinity of many synthetic anionic surfactants which even in their anhydrous state are soft pastes as opposed to crystalline solids, making them unsuitable for use at high levels in bar products. 

Amphoteric surfactants could be considered as disinfectants when in their cationic form, but only the cocoamidopropyl betaines have been shown to behave as true disinfectants. Their biocidal activity increases with the number of secondary amine groups. 

Besides, in the hydrophobic part, a surfactant may have homologous chains and positional isomers for example, cocoamidopropyl betaine may contain alkyl chains with a carbon pair number from 8 to 18, the majority being those with a carbon number of 12 and 14. Aromatic groups are usually bonded in alkyl chain, like in alkylphenols (nonionic) or alkyl-benzenesulfonates (anionic). Also, the hydrophilic part may contain oligomers of ethylene oxide or propylene oxide. In this article, cationic polymers have been included as a subclass of cationic surfactant based on the classification made by Richmond (1990), although many authors consider this polymer to be another ingredient of cosmetic products. Another subclass, quaternary ammonium compounds (four alkyl chains around a nitrogen atom) will be frequently mentioned components. 

There are certain drawbacks of classical two-phase titration, such as the use of chlorinated solvents (chloroform) interferences from cocoamidopropyl betaine (a common ingredient of cleansing cosmetics) and difficult detection of the visual end point when nonionic surfactants are present in formulations. However, these drawbacks can be solved... 

ATR-FTIR is a useful analytical tool for multicomponent analysis that employs a mathematical data-treatment process. Also, Carolei and Gutz (2005) have used this technique combined with chemometrics, to determine three surfactants and water simultaneously in shampoo and in liquid soap without either sample dilution or pretreatment. The surfactants analysed were an amphoteric one (cocoamidopropyl betaine), two nonionic ones (coco diethanolamide in shampoo and alkylpolyglucoside in liquid soap), (minor components) and an anionic one (sodium lauryl ether sulfate). Overlapping bands and water absorption were resolved by two multivariate quantification methods classical least squares (CLS) and inverse least squares (ILS) (Massart et al., 1997, 1998). The wave numbers chosen for the calculation process were preferably those of maximum absorption of the minor components. This method can be applied during the production process but not in final product analysis because of interference caused by the fragrance added in the last step (Figure 7.1.2). 

Chem. Descrip. Cocoamidopropyl betaine Ionic Nature Amphoteric CAS 61780404) EINECS/ELINCS 2634)58-8 Uses Surfactant, vise, builder... 

SLS and DLS experiments on the aqueous micellar solutions of mixed surfactants SDS and cocoamidopropyl betaine (CAPB) show that the mixed micelles undergo a sphere-to-rodlike transition at total concentrations of surfactants as low as 10 mM and at molar fraction 0.8 of CAPB, whereas mixed micelles of CAPB and sodium laureth sulfate (sodium dodecyl-trioxyethylene sulfate, SDP3S) undergo from sphere-to-rodlike transition at higher total surfactant concentration of about 40 mM and at the same molar fraction of CAPB. This difference in the... 

Wilkes, A. J., C. Jacobs, G. Walraven, J. M. Talbot, Quatemized triethanolamine esters (ester-quats) by HPLC, HRCGC, and NMR, World Surfactants Congr., 4th, 1996,1, 389-412. Gerhards, R., I. Jussofie, D. Kasebom, S. Keune, R. Schulz, Cocoamidopropyl betaines. Ten-side, Surfactants, Deterg., 1996,33, 8-14. 

Gerhards, R., I. Jussofie, D. Kasebom, S. Keune, R. Schulz, Analysis of cocoamidopropyl betaines, Tenside, Surfactants, Deterg., 1996,33, 8-14. 

Synonyms Tegobetaine L7 N-cocamidopropyl-N,N-dimethylglycine hydroxide inner salt cocoamidopropylbetaine N-(cocoamido-propyl)-N,N-dimethyl-N-carboxymethyl ammonium betaine N-(3-cocoamidopropyl)-N,N-dimethyl-N-carboxymethyl ammonium hydroxide inner salt N-(3-cocoamidopropyl)-N,N-dimethyl-N-carboxymethyl betaine coconut oil amidopropyl betaine 3-amino-N-(carboxymethyl)-N,N-dimethyl-i-propanaminium-N-coco acyl derivatives, hydroxides, inner salts Uses surfactant in liquid soaps, shampoos, hair colorants, shower and bath formulations Cross cocobetaine... 

---