Hair gel

From Wikipedia, the free encyclopedia

Hair gel is a hairstyling product that is used to stiffen hair into a particular hairstyle. The results it produces are usually similar to but stronger than those of hair spray and weaker than those of hair glue or hair wax.

[edit] Types

Many brands of hair gel in North America and the UK come in numbered variants. Higher numbered gels maintain a greater "hold" on hair, while lower numbers do not make the hair as stiff and in some products give the hair a wet look.

Some forms of hair gel include temporary coloring for the hair, including variants in unnatural colors associated with various subcultures, and is popular within the goth and raver subcultures. ^{[citation needed]}

[edit] Cationic polymers

Cationic polymers are a main functional component of hair gel. The positive charges in polymer cause it to stretch, making the gel more viscous. This is because the stretched-out polymer takes up more space than a coiled polymer and thus resists the flow of solvent molecules around it. The positive charges also bind the gel to the negatively charged amino acids on the surface of the keratin molecules in the hair. More complicated polymer formulas exist, e.g. a copolymer of vinylpyrrolidone, methacrylamide, and N-vinylimidazole. [1]