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Sunscreen compositions containing an ultraviolet radiation-absorbing polyester

  • US 9,592,190 B2
  • Filed: 12/10/2014
  • Issued: 03/14/2017
  • Est. Priority Date: 06/28/2012
  • Status: Active Grant
First Claim
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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 15% or more by weight of a UV-absorbing polyester, which UV-absorbing polyester is the polymerization reaction product of four monomers comprising (1) dimerdiol (“

    DDO”

    ), C36H72, CAS No. 147853-32-5;

    (2) di-trimethylolpropane (“

    DITMP”

    ), C12H26O5, CAS No. 23235-61-2;

    (3) dimethyladipate (“

    DMA”

    ), C8H14O4, CAS No 627-93-0; and

    (4) benzenepropanoic acid, 3-(2h-benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4-hydroxy-methylester (“

    triazole”

    ) C20H23N3O3, CAS No 84268-33-7, wherein the molar ratio of the four monomers (DDO;

    DITMP;

    DMA;

    triazole) is 3.4;

    2.1;

    4.0;

    6.0,about 0.3 to about 3% by weight of an alkylated polyvinylpyrrolidone; and

    an oil-in-water emulsifier selected from the group consisting of an anionic emulsifier and a non-ionic emulsifier, wherein, if said oil-in-water emulsifier comprises said anionic emulsifier, said anionic emulsifier is present at from about 0.5% to about 6% by weight, and wherein if said oil-in-water emulsifier comprises said non-ionic emulsifier, said non-ionic emulsifier is present at from about 1% to about 10% by weight and is free of an oil-gelling polymer; and

    wherein said composition comprises less than 1% by weight of a non-polymeric UV-absorbing sunscreen agent, has an SPF of less than 2 in the absence of said UV-absorbing polyester, an SPF of about 20 or greater and a Water Resistance Value of greater than 65%.

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