Patents Assigned to Josephine L. Kong-Chan
  • Patent number: 5234617
    Abstract: An aqueous liquid bleach composition containing solid, water-insoluble organic peroxyacid, bleach-stable, stilbene fluorescent whitening agent, and polyvinyl pyrrolidone or polyvinyl alcohol is provided.A preferred aqueous liquid bleach composition comprising, by weight of the composition, from 5 to 15 weight % of mononylamido peroxyadipic acid; from about 0.4 to about 10 weight % of polyvinyl pyrrolidone with a molecular weight between about 5,000 and about 100,000; and from about 0.05 to about 2 weight % of a fluorescent whitening agent of the formula: ##STR1## Preferably, the ratio of polyvinyl pyrrolidone to fluorescent whitening agent is between about 20:1 and about 1:1 and the composition has a pH at 20.degree. C. from about 1 to about 6.5.
    Type: Grant
    Filed: April 20, 1992
    Date of Patent: August 10, 1993
    Assignees: Kathleen B. Hunter, Edward E. Getty, Josephine L. Kong-Chan
    Inventors: Kathleen B. Hunter, Edward E. Getty, Josephine L. Kong-Chan