04-01-2018 дата публикации
Номер: US20180002527A1
A stabilized composition includes candle wax; an ultraviolet light absorber; and a hindered amine light stabilizer of formula (I). The compositions stabilize the candle with respect to yellowing, color fading in the case of dyed or pigmented candles, and other degradation of the waxes. The materials and compositions may be used in a wide variety of a candle waxes including, but not limited to, paraffin, beeswax, natural oils, polyamide plus fatty acids and esters thereof, fatty acids such as stearin, opacifiers, glycerides plus oxidized wax, alcohols, and ethylene oligomers. 2. The composition of claim 1 , wherein Ris selected from the group consisting of:{'sub': 1', '21, 'sup': 5', '5, 'C-Calkyl substituted with at least one substituent of formula ORor CN, wherein Ris H, methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, or tert-butyl;'}{'sub': 3', '7, 'sup': '5', 'C-Ccycloalkyl substituted with at least one substituent that is methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, or tert-butyl, O—Ror —CN; and'}{'sub': 4', '21, 'sup': 4', '4, 'C-Calkyl substituted with —CO—R, wherein Ris methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, or tert-butyl.'}3. The composition of claim 1 , wherein each Ris C-Calkyl claim 1 , C-Calkyl claim 1 , or C-Ccycloalkyl.4. The composition of claim 3 , wherein component each Ris a C-Calkyl.5. The composition of claim 1 , wherein each Ris C-Calkyl substituted with at least one substituent of C-Calkoxy or —OH.6. The composition of claim 1 , wherein Ris H.7. The composition of claim 1 , wherein A is —CH—CH— claim 1 , —CH(CH)—CH— or —CH—CH(CH)—.9. The composition of claim 1 , wherein the ultraviolet light absorber is at least one compound selected from the group consisting of: benzotriazole claim 1 , benzophenone claim 1 , alpha-cyanoacrylate claim 1 , oxanilide claim 1 , s-triazine claim 1 , cinnamate claim 1 , malonate claim 1 , benzoate claim 1 , salicylate and benzoxazin-4-one.10. The composition of claim 9 , ...
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