The Effect of Various Cosmetic Pretreatments on Protecting Hair from Thermal Damage by Hot Flat Ironing

August 2011 in “ PubMed ”

Yan Zhou, Raymond Rigoletto, D. Koelmel, G Zhang, Timothy Gillece, Linda Foltis, David J. Moore, Xin Qu, C. C. Sun

thermal damage hot flat irons polymeric pretreatments VP/acrylates/lauryl methacrylate copolymer polyquaternium-55 polyelectrolyte complex protein degradation cuticle integrity

TLDR Polymeric pretreatments can significantly reduce hair breakage and damage from hot flat irons.

The study investigated the effects of various polymeric pretreatments on protecting hair from thermal damage caused by hot flat ironing, which operates at temperatures over 200 °C. Techniques such as FTIR imaging spectroscopy, DSC, and SEM were used to assess hair damage and the protective effects of pretreatments. The study found that thermal stress led to significant hair breakage, but pretreatments with polymers like VP/acrylates/lauryl methacrylate copolymer, polyquaternium-55, and a polyelectrolyte complex of PVM/MA copolymer and polyquaternium-28 significantly reduced breakage. These pretreatments protected the keratin structure, improved moisture retention, and enhanced cuticle integrity, providing thermal protection and reducing hair damage.

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