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Ultraviolet Absorber

Last updated: June 2, 2018

What Does Ultraviolet Absorber Mean?

An ultraviolet absorber is a material that is used to dissipate ultraviolet light into a lower energy state. They are typically used to protect polymers by preventing the harmful ultraviolet light from degrading the polymer.

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Corrosionpedia Explains Ultraviolet Absorber

Ultraviolet absorbers have many different material compositions, including:

  • Benzotriazole is a common ultraviolet absorber for polyvinyl chloride (PVC).
  • Cyanoacrylate is a common absorber for adhesives.
  • Benzophenone is commonly used as an ultraviolet absorber for many different types of plastics.

There is a difference between ultraviolet absorbers and hindered amine light stabilizers. Hindered amine light stabilizers "hinder" the negative effects that ultraviolet light can have on a material, whereas ultraviolet absorbers actually absorb the ultraviolet light and release the energy in the form of heat.

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