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Chemie Products logoChemie Products Pvt. Ltd.PU Colour Specialists

Pigments · 9 min read

UV stability in polyurethane colourants: pigment selection for automotive and outdoor use

Why some pigments fade or chalk in sunlight, and how to specify colorants for parts exposed to daylight.

01How UV degrades colour

  • Pigment vs. polymer degradation
  • Yellowing of aromatic PU

02Pigment families

  • Inorganic vs. organic pigments
  • Light-fastness ratings and what they mean

03System design

  • Coatings, UV absorbers and HALS
  • Testing methods and acceptance criteria

04Specifying with Chemie

  • What data to share with us
  • Typical development timeline

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