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Rinse added fabric softening compositions and method of use for the delivery of fragrance precursors

  • US 6,156,710 A
  • Filed: 02/12/1999
  • Issued: 12/05/2000
  • Est. Priority Date: 08/12/1996
  • Status: Expired due to Term
First Claim
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1. A rinse added fabric softening composition comprising:

  • a) from 0.01% to 15% of an acetal or ketal having the formula;

    ##STR25## wherein R is C3 -C20 linear alkyl, C4 -C20 branched alkyl, C6 -C20 cyclic alkyl, C6 -C20 branched cyclic alkyl, C6 -C20 linear alkenyl, C6 -C20 branched alkenyl, C6 -C20 cyclic alkenyl, C6 -C20 branched cyclic alkenyl, C6 -C20 substituted or unsubstituted aryl, and mixtures thereof;

    R1 is hydrogen or R;

    R2 and R3 are each independently selected from the group consisting of C5 -C20 linear alkyl, C4 -C20 branched alkyl, C6 -C20 cyclic alkyl, C6 -C20 branched cyclic alkyl, C6 -C20 linear alkenyl, C6 -C20 branched alkenyl, C6 -C20 cyclic alkenyl, C6 -C20 branched cyclic alkenyl, C6 -C20 aryl, C7 -C20 substituted aryl, and mixtures thereof;

    provided each acetal or ketal;

    i) is formed from at least one fragrance raw material having a molecular weight greater than or equal to about 100 g/mol;

    ii) has a molecular weight greater than or equal to about 300 g/mol;

    iii) has a molecular weight at least two times greater than the lowest molecular weight fragrance raw material which comprises said acetal or ketal; and

    b) from 85% to 99.99%, by weight of the composition, of adjunct ingredients, said adjunct ingredients selected from the group consisting of fabric softening actives, liquid carriers, concentration aids, soil release agents, perfumes, preservatives, stabilizers, chelants, bacteriocides, colorants, optical brighteners, antifoam agents, and mixtures thereof;

    wherein said compositions have a neat pH of less than 6 at 20°

    C.

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