Fragrance retention

Cosmetics. Talc is widely used in baby and body powders, pressed powders, creams, and antiperspirants. Its softness, sHp, inertness (fragrance retention), and relative safety make this one of the oldest and most widely recognized appHcations for talc. Talc is also used in chewing gum as a detackifier and in tableting as a lubricating process aid. 

Integrated processes encompassing MD and its variants (OMD) are likely to provide solutions to challenging problems like aroma and fragrance retention in food products. 

Copolymers also exist such as PETG, offered by Eastman Plastics. The G indicates the use of a second glycol in the polymer, i.e. 1, 4-cyclohexane-dimethanol (CHDM). The resulting copolymer is an amorphous plastic which has a high degree of clarity, low haze, good resistance to acids, alkalis and many oils and excellent fragrance retention. 

Fragrance retention and release Assessment of the smell intensity of the samples of by (i) sensory evaluation by a panel of experimenters at regular intervals [110], or [ii] by the GC-MS measurements (with solid-phase micro-extraction technique] [153] -A blind method... 

A personal care cleansing composition having enhanced perceptible skin benefits using quaternary ammonium compounds and free fatty acids has been reported. The addition of talc increases qualities to the user such as freshness, smoothness lather, and creaminess. Fragrance retention is improved (10). 

Uses Emulsifier, rheological control agent in lip care, mascara, foundations Features Food grade inert superior color, UV stability increases opacity, hardness improved oil/fragrance retention... 

Barbe, A.M., et al. Retention of volatile organic flavor/fragrance components in the concentration of liquid foods by osmotic distillation, J. Membr. Sci., 145, 67, 1998. 

Our second motivation for utilizing CDs with polymers is to alter their functionalities through incorporation of CDs into their backbones during polymerization or to attach them to polymer side chains via postpolymerization reactions. The presence of covalently bonded CDs in polymers serves to increase their acceptance and retention of additives, such as dyes, fragrances, antibacterials, etc. They may also be further reacted or treated through their covalently bonded CDs to cross-link and form networks or to form blends with other polymers having a propensity to thread through their attached CD cavities. 

WO 02/077150 10/2002 Pashkovski et al.l Colgate-Palmolive Fragrance-containing gel delivering enhanced deposition and retention of said fragrance (from structured liquids)... 

We have touched briefly on how reduced vapour pressures can lead to reduced rates of evaporation. This means that physicochemical properties not only influence perfume volatility per se but also affect other aspects of fragrance behaviour, such as substantivity and retention. These terms are used within the industry to denote perfume longevity in use, usually with respect to a particular substrate and/or surface (e.g. skin, hair, cloth, etc.). 

The Q is put into QSAR by describing the structure of a compound in a quantitative way, the simplest examples of quantitative descriptors being the mass of the compound or the number of atoms present. When the compound is described using physical, as opposed to structural, properties the relationship becomes a PAR. Correlations of this type have been used in the perfumery industry to describe and predict the substantivity and retention of fragrance ingredients that is, the ability of a compound to stick to and remain bound to surfaces such as hair, skin or cloth (see Chapter 11 for more details). 

An odour standard of n-alkane vapours is used to calibrate sensitivity and specificity of the zNose . Specificity is what allows the instrument to recognize known chemicals and/or chemical groups (odour signatures) and to deliver the appropriate alarms. The zNose is an ultra-fast GC which separates and measures the concentration of the individual chemicals of an odour directly, typically in 10 seconds. Individual chemicals are recognized by their retention time relative to the retention times of the linear-chain alkanes. Tabulating the retention times and detector counts (cts) provides a complete and quantitative measure of any odour or fragrance. 

This approach makes it possible to have alkane-based retention indices in the second-dimension if low-polarity second-dimension columns are employed therefore, most reference data for essential oil and fragrance compounds are compatible with GCxGC. Theoretical details for this method of calculating retention indices can be found in Chapter 3. The research group from the Dalian Institute of Chemical Physics has demonstrated the qualitative determination of 60 compounds in tobacco leaf extract based on two-dimensional retention indices alone [34], confirming these identities with mass spectrometry. 

Identification of these suspected allergens according to the International Fragrance Association (IFRA) official method [60] relies on a combination of retention time and ratio of selected ions acquired in selected ion monitoring mode. A single m/z channel is used for quantification, and the ratio of this ion with two additional characteristic is used for identification confirmation... 

---