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In the ingredient descriptions: Good means that I like to see this in a product's list of ingredients. Okay means this product appears safe for a curly person like me to use. Caution means that this ingredient may not be good in some hair care products, or for some people. Avoid means this ingredient may hurt your hair. If you see this ingredient in a hair product, it's best to put it down and walk away.

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PPG   
Avoid
PPG is an abbreviation for Polyoxypropylene Glycol and Polypropylene Glycol [Winter pg 414]. This often functions as a humectant. Since this product contains Polyoxyproplylene Glycol, that means it contains Ethylene Oxide, which is banned in Europe and Canada for use in Cosmetics, so I'm giving this an "Avoid" status. —T
See also: Polyoxypropylene Glycol Polypropylene Glycol Ethylene Oxide
Source(s): Winter

PPG-1 Trideceth-6   
Caution
An emollient often used for skin conditioning. It also prevents a product from separating. Since the PPG part of this product contains Polyoxyproplylene Glycol, that means it contains Ethylene Oxide. Ethylene Oxide is banned in Europe and Canada for use in Cosmetics, so I'm giving this a "Caution" status, since I'm not sure how much Ethylene Glycol is in this ingredient (I'm not sure whether or not there's enough in here to cause a problem, since this ingredient will be in a product with lots of other ingredients). —T
See also: Polyoxypropylene Glycol Polypropylene Glycol Ethylene Oxide
Source(s): http://www.cosmeticsdatabase.com/ingredient.php?ingred06=705236&refurl=%2Fscoring%2Fdraw_brand.php%3Fbrand_id%3D619%26

PPG-2 Methyl Ether    (aka Methylene glycol, Dipropylene glycol methyl ether)
Caution
Used as a fragrance ingredient and a solvent (helps to dissolve one product into another) in hair sprays. Has a mild, pleasant scent.Since the PPG part of this product contains Polyoxyproplylene Glycol, that means it contains Ethylene Oxide. Ethylene Oxide is banned in Europe and Canada for use in Cosmetics, so I'm giving this a "Caution" status, since I'm not sure how much Ethylene Glycol is in this ingredient (I'm not sure whether or not there's enough in here to cause a problem, since this ingredient will be in a product with lots of other ingredients). —T
See also: Polyoxypropylene Glycol Polypropylene Glycol Ethylene Oxide
Source(s): http://www.cosmeticdatabase.com/ingredient.php?ingred06=705255¬hanks=1 http://www.cosmeticsinfo.org/ingredient_details.php?ingredient_id=1705

PPG-5-Ceteth-20   
Okay
The PPG stands for polypropylene glycol and polyoxypropylene glycol [Winter (7th edition) page 430]. This is used as a wetting agent and to help mix together normally un-mixable ingredients (such as oil and water). [Gottschalck pg 2202]
See also: Polypropylene glycol Polyoxypropylene glycol Ceteth-2
Source(s): Winter Gottschalck

PPG-10 Butanediol   
Caution
I haven't been able to find any objective information on this ingredient. Right now I will put an educated guess about it based on similar ingredients. When I find out more about it, I'll add it here.—T Based on the information I've found about PPG-10 Cetyl Ether and other PPG compounds, it looks like this is a mixture of PPG-10 and Butanediol. The PPG-10 is used as an emollient, and the Butanediol is used as a humectant. [Winter pgs 414,424; Hunting (Conditioning) pgs 130, 341]. See also PPG and Butylene Glycol. Since the PPG part of this product contains Polyoxyproplylene Glycol, that means it contains Ethylene Oxide. Ethylene Oxide is banned in Europe and Canada for use in Cosmetics, so I'm giving this a "Caution" status, since I'm not sure how much Ethylene Glycol is in this ingredient (I'm not sure whether or not there's enough in here to cause a problem, since this ingredient will be in a product with lots of other ingredients). —T
See also: PPG Butylene glycol Ethylene Oxide
Source(s): Hunting Winter

PPG-10 Cetyl Ether   
Caution
Made from processed Cetyl Alcohol. Used for conditioning and to keep product from separating. Considered nontoxic and nonirritating to eyes and skin. A light yellow to colorless liquid that's insoluble in water. It will dissolve in mineral oil. It's mild, stable and odorless [Hunting (Conditioning) pg 341]. Since the PPG part of this product contains Polyoxyproplylene Glycol, that means it contains Ethylene Oxide. Ethylene Oxide is banned in Europe and Canada for use in Cosmetics, so I'm giving this a "Caution" status, since I'm not sure how much Ethylene Glycol is in this ingredient (I'm not sure whether or not there's enough in here to cause a problem, since this ingredient will be in a product with lots of other ingredients). —T
See also: Cetyl alcohol PPG Ethylene Oxide Polyoxypropylene Glycol
Source(s): Hunting

PPG-14 Butyl Ether   
Caution
Used as a conditioning ingredient. Since the PPG part of this product contains Polyoxyproplylene Glycol, that means it contains Ethylene Oxide. Ethylene Oxide is banned in Europe and Canada for use in Cosmetics, so I'm giving this a "Caution" status, since I'm not sure how much Ethylene Glycol is in this ingredient (I'm not sure whether or not there's enough in here to cause a problem, since this ingredient will be in a product with lots of other ingredients). —T
See also: PPG Ethylene Oxide Polyoxypropylene Glycol
Source(s): http://www.cosmeticscop.com/

PPG-Ceteth-20   
Okay
Made from condensing Cetyl alcohol. Used as an emulsifier, and for conditioning. Comes as a pale yellow to almost colorless liquid that's water soluble and odorless [Hunting (conditioning pg 340].
See also: Cetyl alcohol
Source(s): Hunting



References:

Applewhite, Thomas H., ed. Proceedings of the World Conference on Lauric Oils: Sources, Processing, and Applications
AOCS Publishing, 1994.

Barel, André O., Marc Paye, and Howard I. Maibach., eds. Handbook of Cosmetic Science and Technology, Second Edition
Marcel Dekker, Inc., 2001.

Begoun, Paula. Don’t Go Shopping for Hair-Care Products Without Me. 3rd Edition.
Renton: Beginning Press, 2005.

Begoun, Paula. The Beauty Bible.
Renton: Beginning Press, 2002.

Begoun, Paula. Don’t Go to the Cosmetics Counter Without Me.
Renton: Beginning Press, 2003.

Bellum, Sarah, ed. The Beauty Brains: Real Scientists Answer Your Beauty Questions
New York: Brains Publishing, 2008.

Gottschalk, Tari E. and McEwen, Gerald N, Jr. PhD, eds. International Cosmetic Ingredient Dictionary and Handbook, Tenth Edition 2004, Volumes 1-4.
Washington D. C.: The Cosmetic, Toiletry, and Fragance Association, 2004.

Halal, John Hair Structure and Chemistry Simplified, Fifth Edition
Albany: Milady, 2002.

Hunting, Anthony L.L. Encyclopedia of Conditioning Rinse Ingredients.
Cranford, NJ: Micelle Press, Inc., 1987.

Hunting, Anthony L.L. Encyclopedia of Shampoo Ingredients.
Cranford, NJ: Micelle Press, Inc., 1983.

Johnson, Dale H. (Ed.). Hair and Hair Care, Cosmetic Science and Technology Series. Vol. 17.
New York: Marcel Dekker, 1997. Print.

Nnanna, Ifendu A. and Jiding Xia., eds. Protein-Based Surfactants: Synthesis: Physicochemical Properties, and Applications (Surfactant Science)
Madison Heights: CRC, 2001.

Quadflieg, Jutta Maria. Fundamental properties of Afro-American hair as related to their straightening/relaxing behaviour.
Diss. U of Rheinisch-Westfälischen Technischen Hochschule Aachen, 2003.

Schueller, Randy and Perry Romanowski, eds. Conditioning Agents for Hair and Skin.
New York: Marcel Dekker, Inc., 1999.

Winter, Ruth M.S. A Consumer's Dictionary of Cosmetic Ingredients: Complete Information About the Harmful and Desirable Ingredients Found in Cosmetics and Cosmeceuticals
New York: Three Rivers Press, 2005.

Zviak, Charles., ed. The Science of Hair Care (Dermatology)
New York: Marcel Dekker, Inc., 1986.

 

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