UV absorption and photoisomerization of p-methoxycinnamate grafted silicone

Photochemistry and Photobiology
Supason PattanaargsonYongsak Sritana-anant

Abstract

p-Methoxycinnamate moieties, UV-B-absorptive chromophores of the widely used UV-B filter, 2-ethylhexyl p-methoxycinnamate (OMC), were grafted onto the 7 mol% amino functionalized silicone polymer through amide linkages. Comparing with OMC, the resulting poly [3-(p-methoxycinnamido)(propyl)(methyl)-dimethyl] siloxane copolymer (CAS) showed less E to Z isomerization when exposed to UV-B light. The absorption profiles of the product showed the maximum absorption wavelength to be similar to that of OMC but with less sensitivity to the type of solvent. Poly (methylhydrosiloxane) grafted with 10 mol% p-methoxycinnamoyl moieties was prepared through hydrosilylations of 2-propenyl-p-methoxycinnamate, in which the resulting copolymer showed similar results to those of CAS.

References

Jan 1, 1990·Journal of the American Academy of Dermatology·C R TaylorB A Gilchrest
Jan 1, 1996·Annual Review of Medicine·C R Taylor, A J Sober
Oct 6, 1997·Lancet·C G HaydenH A Benson
Aug 1, 1998·Contact Dermatitis·C RicciA Tosti
Jan 27, 1999·Mutation Research·J J Finlay-Jones, P H Hart
Dec 20, 1999·Pharmaceutical Research·V K GuptaM Rerek
Dec 3, 1999·British Journal of Clinical Pharmacology·R JiangH A Benson
May 3, 2001·Environmental Health Perspectives·M SchlumpfW Lichtensteiger
Nov 13, 2001·The British Journal of Dermatology·A DarvayJ P McFadden
May 24, 2008·International Journal of Cosmetic Science·S Pattanaargson, P Limphong

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Citations

Oct 18, 2011·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Azusa KikuchiMikio Yagi
Jul 17, 2012·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Nozomi Oguchi-FujiyamaMikio Yagi
Nov 10, 2012·Photochemistry and Photobiology·Azusa KikuchiMikio Yagi

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