Ciba Specialty Chemicals Corporation

Kevin Trainor

Mervin Gale Wood

Andrea R Smith

James L Hyun

Joseph Suhadolnik

Ramanathan Ravichandran

Walid Al-Akhdar

Mark Mc Cusker

Mark McCusker

Dyes and pigments present in candle wax compositions are particularly well stabilized against color fade or color change by a combination of a UV absorber and a metal compound, particularly a tin compound. The further addition of a hindered amine or antioxidant is highly beneficial.

Candle wax compositions stabilized with UV absorber-metal combinations

White, dyed, dipped, unscented and/or scented candle wax is effectively stabilized against discoloration and fading by the incorporation therein of a red-shifted benzotriazole either alone or in combination with a hindered amine and/or an antioxidant.

Candle wax stabilized with red-shift benzotriazoles

Candle wax containing a combination of a UV absorber, preferably a benzotriazole, in combination with a hindered amine which is substituted on the N-atom by an alkoxy, a cycloalkoxy or an hydroxy-substituted alkoxy moiety is surprising better stabilized than candle wax which contains a combination of a UV absorber and a conventional hindered amine where the N-atom is substituted by hydrogen or alkyl.

Candle wax stabilized by a combination of UV absorber plus a selected hindered amine

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Brewster, NY, United States of America

Kevin Trainor