Stabilizing agent for peroxide-bleaching procedure and methods of bleaching a fiber material by using same
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United States of America Patent
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Sep 19, 2000
Grant Date -
N/A
app pub date -
Jun 16, 1997
filing date -
Jun 21, 1996
priority date (Note) -
Expired
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Abstract
A stabilizing agent for peroxide-bleaching procedure includes (A) a component including a homopolymer or copolymer of .alpha.-hydroxyacrylic acid or water soluble salt or polylactone of the homo- or co-polymer, (B) a component including a homopolymer or copolymer of acrylic acid, methacrylic acid and/or maleic acid and water-soluble salt of the homo- or co-polymer, (C) a component including DTPA, TTHA or water-soluble salt thereof and optionally (D) a component including a water-soluble inorganic Mg salt and is used to pretreat a fiber material with a pretreating liquid containing the stabilizing agent before bleaching with peroxide, or to bleach the fiber material by a bleaching liquid containing a peroxide bleaching agent and the stabilizing agent.
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