Cotton-gentle hypochlorite bleach
AssigneeLH Taylor Associates
InventorLawnie Henderson Taylor
Life of this patent
Estimating the term…
Abstract
Methodologies and equipment for using a hypochlorite solution to remove menstrual fluid, underarm perspiration or other hard-to-remove stains from soft fabric articles with reduced damage to the fabric articles when compared with popular chlorine bleaches. The soft fabric articles preferably are in white, although the present invention can also be applied to articles in other colors. In one embodiment, the weight concentration ratio of the alkali metal hydroxide over the hypochlorite salt in the hypochlorite solution is no less than 1:12.5. The hypochlorite solution may contain at least 0.2% by weight of sodium hydroxide and/or have a pH of at least 11.8.
Claims21
A method for preparing a bleach cleaning composition for cleaning a stain from a soft fabric article and by which method the damaging effect of a metallic salt of hypochlorous acid solution on the soft fabric article can be reduced progressively to a minimum, said method comprising,
- providing a bleach cleaning composition for use in cleaning a stain from a soft fabric article,
- wherein said bleach cleaning composition is an effective concentration of a metallic salt of hypochlorous acid to provide the bleach cleaning function of said composition combined with a concentration of an alkali metal hydroxide for reducing the damaging effect of said metallic salt of hypochlorous acid on said soft fabric contacted by said bleach cleaning composition,
- wherein said concentration of alkali metal hydroxide and said effective concentration of metallic salt of hypochlorous acid are intentionally related by a weight concentration ratio, defined as the weight percent concentration of the metallic salt of hypochlorous acid over the weight percent concentration of the alkali metal hydroxide in said bleach cleaning composition (or the reciprocal ratio),
- whereby said weight concentration ratio (or the reciprocal ratio) allows the selection of the concentration amount of alkali metal hydroxide required for a given extent of damage reduction of a given concentration of metallic salt of hypochlorous acid in said bleach cleaning composition contacting a soft fabric article,
- wherein said composition consists of a metallic salt of hypochlorous acid, at least 0.2 weight percent of an alkali metal hydroxide, and.
- wherein unspecified additive(s) unrelated to the claimed invention is(are) not excluded.
A bleach product comprising:
- a bleach cleaning composition for use in cleaning stain from a soft fabric article, and that has reduced damaging effect of the metallic salt of hypochlorous acid solution on the soft fabric article, said damaging effect for a given bleach cleaning composition being determined by,
- providing a bleach cleaning composition for use in cleaning a stain from a soft fabric article,
- wherein said bleach cleaning composition is an effective concentration of a metallic salt of hypochlorous acid to provide the bleach cleaning function of said composition combined with a concentration of an alkali metal hydroxide for reducing the damaging effect of said metallic salt of hypochlorous acid on said soft fabric contacted by said bleach cleaning composition,
- wherein said concentration of alkali metal hydroxide and said effective concentration of metallic salt of hypochlorous acid are intentionally related by a weight concentration ratio, defined as the weight percent concentration of the metallic salt of hypochlorous acid over the weight percent concentration of the alkali metal hydroxide in said bleach cleaning composition,
- whereby said weight concentration ratio allows the selection of the concentration amount of alkali metal hydroxide required for a given extent of damage reduction of a given concentration of metallic salt of hypochlorous acid in said bleach cleaning composition contacting a soft fabric article,
- wherein said composition consists of a metallic salt of hypochlorous acid, at least 0.2 weight percent of an alkali metal hydroxide, and
- wherein unspecified additive(s) unrelated to the claimed invention is(are) not excluded.
21-130. (canceled)
Dependencies are inferred from the claim text.