Candle wax compositions stabilized with uv absorbers and select hindered amine light stabilizers
AssigneeBASF SE
InventorsMervin G. Wood, Diane T. Langer, Don M. Barber, Leo Devota
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Abstract
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.
Claims27
A stabilized composition comprising:
- candle wax;
- an ultraviolet light absorber;
- and
- a hindered amine light stabilizer of formula (I)
- wherein:
- A is —CH(R3)—CH2— or —CH2—CH(R3)—;
- each R1 is C1-C21 alkyl;
- acyclic C3-C21 alkenyl having 1, 2, or 3 double bonds;
- or C3-C7 cycloalkyl;
- R2 is H or C1-C3 alkyl;
- and
- R3 is H or C1-C4 alkyl.
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A method of stabilizing candle wax, which method comprises adding to a candle wax composition an effective stabilizing amount of
- an ultraviolet light absorber;
- and
- a hindered amine light stabilizer of formula (I)
- wherein:
- A is —CH(R3)—CH2— or —CH2—CH(R3)—;
- each R1 is C1-C21 alkyl;
- acyclic C3-C21 alkenyl having 1, 2, or 3 double bonds;
- or C3-C7 cycloalkyl;
- R2 is H or C1-C3 alkyl;
- and
- R3 is H or C1-C4 alkyl.
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Dependencies are inferred from the claim text.