Whitening agents for cellulosic substrates
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United States of America Patent
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Mar 20, 2012
Grant Date -
Dec 1, 2011
app pub date -
Aug 11, 2011
filing date -
Jan 19, 2007
priority date (Note) -
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Abstract
This invention relates to novel whitening agents for cellulosic substrates. The whitening agents are comprised of at least two components: at least one chromophore component and at least one polymeric component. Suitable chromophore components generally fluoresce blue, red, violet, or purple color when exposed to ultraviolet light, or they may absorb light to reflect these same shades. The whitening agents are further characterized by having a dispersion component value of the Hansen Solubility Parameter of less than or equal to about 17 MPa0.5. This invention also relates to laundry care compositions including but not limited to liquid and/or powder laundry detergent formulations and rinse added fabric softening (RAFS) compositions that comprise such whitening agents.
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