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The Chemistry Behind Hair Spray
Transcript of The Chemistry Behind Hair Spray
- Solvents: used as a carrier for the active ingredients in the hair spray and are selected based on them agreeing with the propellants and chemicals.
- Elastesse-:keep the hair firm and stiff without causing it to become very brittle that it will end up breaking or snapping.
-pytocalcious :a chemical that enhances minerals in the roots of hair and adds in additional stiffness.
~Chemist's Job By Ushna Khan What Is Hair Spray? a liquid in an aerosol or other spray container, for holding the hair in place. Origin After the World War 2 the world of beauty/ fashion resulted in this useful product. At that time just aerosol was used to kill insects. Later on was its actual power discovered. Aerosol allowed liquid (hairspray) that transformed into mist by generated gas. Hair spray in 1950 Helene Curtis became the first to use the term "hairspray" for the new aerosol product called Spray Net. How does the hair stay in place? ~ Polymers They are long chain like molecules that cause the hair to stay. When the solvent evaporates, these polymer molecules act as a "glue" that places there hair they way you want it to. Main Polymers Used In the making of hairspray many different polymers were used such as polyvinylpyrrolidone- water soulable and the propensity for soaking up the humidity causes the "stickiness". Others like polydimethysiloxane and vinyl acetate which are non-soulabe create copolymers which get rid of the humidity.This provides a longer lasting hairspray. Harmful Ingredients - Ethanol: is volatile organic compounds (VOCs) and the use has been restricted because it is hazardous and contributes to air pollution. (C2H6O)--> Formula
_Vinyl Chloride: a chemical that caused health issues found in aerosol cans and this propellant was slowly disappeared from use. (C2H3Cl) --> Formula
- Chlorofluorocarbon (CFC): a propellant that caused damage to the ozone layer, containing botane and propane which caused a certain amount o pressure in the can.
-Hydrocarbons: a propellant that gained popularity in1980s but because it caused air pollution the use of this slowly decreased. CFC Ethanol CFC Design Sites I Used http://dictionary.reference.com/browse/hair+spray?s=t
http://www.pbs.org/tradesecrets/evidence/secrecy_pop02.html For the product to be safe and not cause an increasing amount of damage. Chemists have to look at efficacy, safety, cost, consumer appeal, and regulatory considerations. They have to see how each polymer and propellants react to the what they are enclosed within or how they react to the hair. That the product reacts the way it is suppose to without any conflicts arising. For all this to successfully occur chemists experiment on animals. Natural Polymers&Solvents There are natural ingredients also used in many hair sprays such as gum arabic which is made from sap of trees in Sudan. Gum tragacanth is another herbal gum that is used to stiffen the hair. (gum arabic)