SUNSCREEN COMPOSITIONS CONTAINING AN ULTRAVIOLET RADIATION-ABSORBING POLYESTER
Compositions including an oil phase substantially homogeneously distributed in a continuous water phase, the oil phase including a sunscreen agent that includes a UV-absorbing polyester in an amount effective to provide the composition with an SPF of about 10 or greater and which is the polymerization reaction product of monomers including a UV-absorbing triazole, a diester, a diol and a tetrol polyol; an alkylated polyvinylpyrrolidone; and an emulsifier selected from anionic emulsifier and/or a non-ionic emulsifier, where the composition is substantially free of a non-polymeric UV-absorbing sunscreen agent and has an SPF of less than 2 in the absence of the UV-absorbing polyester.
1 . A composition, comprising:
a continuous water phase,
a discontinuous oil phase homogeneously distributed in said water phase, said oil phase comprising a sunscreen agent comprising about 10% or more by weight of a UV-absorbing polyester, which UV-absorbing polyester is the polymerization reaction product of monomers comprising a UV-absorbing triazole, a diester, a diol and a tetrol polyol,
an alkylated polyvinylpyrrolidone; and
an oil-in-water emulsifier selected from the group consisting of an anionic emulsifier and a non-ionic emulsifier,
wherein said composition is substantially free of a non-polymeric UV-absorbing sunscreen agent and has an SPF of less than 2 in the absence of said UV-absorbing polyester.
2 . (canceled)
3 . (canceled)
4 . The composition of claim 1 wherein said sunscreen agent consists essentially of said UV-absorbing polyester.
5 . The composition of claim 1 comprising about 12% or more by weight of said UV-absorbing polyester.
6 . (canceled)
7 . The composition of claim 1 wherein said UV-absorbing polyester has a weight average molecular weight of about 4,000 or more.
8 . The composition of claim 1 having an SPF of about 20 or greater.
9 . The composition of claim 1 wherein the UV-absorbing triazole, the diester, the diol and the tetrol polyol are reacted such that the mole fraction of UV-absorbing triazole, relative to the total number of moles of monomer used in the reaction, is from about 0.39 to about 0.60.
10 . The composition of claim 1 wherein the UV-absorbing triazole, the diester, the diol and the tetrol polyol are reacted such that the mole fraction of UV-absorbing triazole, relative to the total number of moles of all monomers used in the reaction, is from about 0.37 to about 0.42.
11 . The composition of claim 1 wherein the oil-in-water emulsifier is an anionic emulsifier.
12 . The composition of claim 1 wherein the oil-in-water emulsifier is a non-ionic emulsifier.
13 . The composition of claim 12 wherein the non-ionic emulsifier has a molecular weight of about 10,000 daltons or less.
14 . The composition of claim 1 wherein the oil in water emulsifier is present in a concentration by weight from about 0.5% to about 6%.
15 . The composition of claim 1 wherein the oil in water emulsifier is present in a concentration by weight from about 1% to about 4%.
16 . The composition of claim 1 wherein the alkylated polyvinylpyrrolidone is present in a concentration by weight from about 0.3% to about 3%.
17 . The composition of claim 1 wherein the alkylated polyvinylpyrrolidone is present in a concentration by weight from about 1% to about 2.5%.
18 . The composition of claim 1 wherein the UV-absorbing polyester is the polymerization reaction product of a UV-absorbing triazole, dimethyladipate, dimerdiol and di-trimethylolpropane, wherein the UV-absorbing triazole, dimethyladipate, dimerdiol and di-trimethylolpropane are reacted such that the mole fraction of UV-absorbing triazole, relative to the total number of moles of monomer used in the reaction, is from about 0.39 to about 0.60.
19 . The composition of claim 4 comprising about 15% or more by weight of said UV-absorbing polyester.