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Sunblocking polymers and their formulation

  • US 5,487,885 A
  • Filed: 12/09/1993
  • Issued: 01/30/1996
  • Est. Priority Date: 12/21/1992
  • Status: Expired due to Fees
First Claim
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1. A polyacrylic acid based sunscreen composition having as its UV absorbing moieties:

  • for UV-A, a compound of the formula;

    ##STR4## wherein;

    n is 0 or 1;

    Z is oxy or amino of not more than about than about 12 carbon atoms;

    Y is non-oxo carbonyl of not more than about 12 carbon atoms; and

    W is oxy or amino;

    for UV-B, a compound of the formula;

    ##STR5## wherein;

    R2 is hydrogen or alkyl of up to 6 carbon atoms;

    R3 is a divalent hydrocarbylene group;

    W and R are as defined above;

    for UV-C, a compound of the formula;

    ##STR6## wherein;

    R4 is hydrogen or alkyl of from 1 to 6 carbon atoms; and

    the other symbols have been defined above; and

    an oxyaliphatic substituted acrylic acid of the formula;

    
    
    space="preserve" listing-type="equation">R.sup.5 WCOC(R)═

    CH.sub.2wherein R5 is an aliphatic group of from 1 to 4 carbon atoms having from 1 to 3 oxy groups, wherein the other symbols have been defined previously; and

    the polymer is insoluble in water and swellable in a polyethylene glycol-water composition comprising from about 50-95% polyethylene glycol.

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