Formulations aging

Finally, a third formulation was devised which excluded the use of Freon 11 In the polyol component. Freon 11 was placed In the Isocyanate component and both Isocyanate and polyol components were changed to meet viscosity considerations. Subsequent aging studies showed the Isocyanate to age similarly to the previously aged (Formulation 2) Isocyanate. The polyol showed virtually no Increase In acid number at any aging temperature over 13 months. Thus, at ambient temperature we would expect a 6-8 year system lifetime on the Isocyanate before a 10% change In analytical properties would dictate a material change-out. The polyol appears to have a greater lifetime, but would probably be replaced at the same time. 

A third experiment was conducted to study the effect of compaction upon suspensibility. To reduce costs of ocean shipment, all industrial powders are compacted at the time of manufacture. Although the effects of compaction are unclear, the current practice is to compact immediately after air milling. Miles et al (2) have shown that compaction decreases suspensibility when the formulation is subjected to conditions of tropical storage however, their observations were made on aged formulations. This experiment, which is an extension of their work, used freshly ground powder to study the effect of the time interval between milling and compacting on suspensibility. 

Our first step was to develop a simple effective wind tunnel which allowed us to age formulations in the laboratory under very nearly natural conditions. Rather than attempt to control all climatic parameters - temperature, pressure, humidity, light intensity, wind speed, turbulence, etc. - which would have been a formidable engineering task, a very simple design was chosen in which only air speed, temperature and illumination were controlled The only real deficiency in this system is the lack of control of humidity. However, that aspect was addressed separately by measuring the pheromone release rate of each formulation under conditions of very high and very low humidity. To date, none of the candidates tested has shown a major humidity dependence. 

The purported health benefits of antioxidants have made them a popular component in anti-aging formulations. 

Silhydrate C. [Exsymcd] Copper PCA methylsilanol moisturizer fx tidn care and anti-aging formulations. 

TheophylUsilane C. [Exsymol] Methyl-siliuiol theqphyllinacetate alginate for slimming and anti-aging formulations. 

One of the most tantalizing chemical transformations known to ancient practitioners of inorganic chemistry involved roasting of mercuric sulfide ores such as cinnabar to form hydrargyrum or quicksilver (60). As the toxic properties of mercury became more widely appreciated in the middle ages, formulations of the metal and its salts were used in medical applications. 

The two nitrile compounds were suggested by the main UK supplier at the time to represent a general purpose material (P) and a good ageing formulation (R). 

Definition Oligomeric methylsilanol deriv. of pectin which is further reacted with ascorbic acid Uses Antioxidant, vise, control agent in cosmetics, anti-aging formulations, after-sun treatments, superficial burn treatments Trade Name Synonyms Ascorbosilane C f[Exsymol http //www.exsymol.com] Biosil Tech, http //www.biosiltech.com]... 

RCO- rep. fatty acid radical from coconut oil Uses Emulsifier in cosmetics, anti-aging formulations, health preps., soaps... 

Definition Hydrolysate of animal trachea derived by acid, enzyme, or other hydrolysis Uses Biological additive, skin conditioner in cosmetics, skin care, anti-aging formulations... 

Porous silicon particles could be utilized in a variety of consumer care applications if their cost of manufacture becomes low enough. Silica and porous silica are already widely used by the toothpaste and cosmetic industries, and porous silicon offers superior mechanical properties for teeth cleaning and very different optical properties for cosmetics. Partial thermal oxidation has been used to improve shelf life in liquid formulations and to match brown skin tones. Preliminary mouthfeel testing for oral hygiene products has been carried out, but formalized skin-feel testing and optimization is required for numerous dermatological products. Product examples discussed include multifunctional dentifrice abrasives, sunscreens, bronzers, foundation and makeup additive, and anti-aging formulations. 

More than 30 different cosmetic products incorporate nanoingredients. These nanomaterials-including buckyballs, nano silica, nano zinc oxide, and other nanoencapsulated material-are key ingredients in anti-aging formulations and sunscreens. 

Uses Coemulsifier, emollient, humectant, stabilizer, vise, modifier with dry afterfeel for anti-aging formulations, sun care, skin care, hair care, color cosmetics Properties Oil-sol., water-disp. 100% act. 

Uses Emollient, moisturizer, gloss aid, pigment dispersant, and wetting agent used in facial powds., blushes, foundations, eye shadow, body powds., anti-aging formulations... 

Synenyms D-Glucitol, 1,4-anhydro-, 6-monoester with olive oil fatty acids Definitien Derived from olive oil fatty acids and sorbitol Uses Emulsifier and surfactant used In sunscreens, facial molsturizers/treatments, shaving creams, sunscreens, and anti-aging formulations Cyclotetrasiloxane CAS 223706-40-9... 

---