Surfactant-free detergent composition comprising an anti-soil redeposition agent
AssigneeMiz Co., Ltd.
InventorsKazuyoshi Arai, Tomoki Seo
Life of this patent
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Abstract
Washing is carried out using a detergent composition having main detergency obtained through an alkaline inorganic salt and further including at least an anti-soil redeposition agent. There is provided a clothes washing method, and a detergent composition for the same, that uses a detergent having detergency equivalent to or greater than that of synthetic detergents containing a surface active agent as the main detergency ingredient and also has excellent anti-soil redeposition efficiency wherein main detergency is obtained by an alkaline inorganic salt.
Claims17
A clothes washing method characterized by washing with a washing liquid obtained by dissolving in water a detergent composition that does not include a surface active agent, but includes, as a substantial active component for detergency, a washing component comprising:
- A) an alkaline buffer system comprising:
- a) a pH buffer action salt;
- and
- b) an alkaline inorganic salt selected from the group consisting of:
- i) carbonate alkali metal salt,
- ii) silicate alkali metal salt,
- iii) carbonate alkali metal salt and bicarbonate alkali metal salt,
- iv) bicarbonate alkali metal salt and silicate alkali metal salt,
- v) carbonate alkali metal salt and silicate alkali metal salt;
- and
- B) an anti-soil redeposition component that prevents resoiling of hydrophilic fibers and hydrophobic fibers when coexisting with said inorganic salt, which is a water-soluble polymer substance of a non-ionic system including at least one species selected from the group consisting of an acetyl group, methoxyl group, hydroxypropyl group, and poly-oxy propylene group as the hydrophobic group, and including a hydroxyl group as the hydrophilic group;
- wherein the detergent composition has a pH between 9.5 and 11, is dissolved in a concentration of 0.5 to 5 g/L to form the washing liquid, and through the existence of said anti-soil redeposition component, has a surface tension of 58 dyne/cm or less.
A clothes washing detergent that does not include a surface active agent, but includes, as a substantial active component for detergency, a washing component comprising:
- A) an alkaline buffer system comprising:
- a) a pH buffer action salt;
- and
- b) 90 wt % or greater, based on the total weight of the detergent, of an alkaline inorganic salt selected from the group consisting of:
- i) carbonate alkali metal salt,
- ii) silicate alkali metal salt,
- iii) carbonate alkali metal salt and bicarbonate alkali metal salt,
- iv) bicarbonate alkali metal salt and silicate alkali metal salt,
- v) carbonate alkali metal salt and silicate alkali metal salt;
- and
- B) an anti-soil redeposition component that prevents resoiling of hydrophilic fibers and hydrophobic fibers when coexisting with said inorganic salt, which is a water-soluble polymer substance of a non-ionic system including at least one species selected from the group consisting of an acetyl group, methoxyl group, hydroxypropyl group, and poly-oxy propylene group as the hydrophobic group, and including a hydroxyl group as the hydrophilic group;
- wherein the detergent composition has a pH between 9.5 and 11, is dissolved in a concentration of 0.5 to 5 g/L to form a washing liquid, and through the existence of said anti-soil redeposition component, has a surface tension of 58 dyne/cm or less.
Dependencies are inferred from the claim text.