Two-agent type liquid bleaching compositions
AssigneeKao Corporation
InventorsKazuyoshi Ozaki, Masataka Maki, Nobuyuki Ogura, Muneo Aoyagi
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Abstract
To provide two-agent type liquid bleaching compositions having excellent bleaching effect even if a mixing ratio of the two agents varies, great usability, and no problem in storage stability, two-agent type liquid bleaching compositions contains an agent A and an agent B filled and held in separate chambers of a container and comprises the agent A made of constituents containing 0.1 to 10% by weight of hydrogen peroxide and water and provided with certain buffering capacity, and the agent B made of constituents containing an alkali agent and water and provided with certain buffering capacity.
Claims10
Two-agent type liquid bleaching compositions made of an agent A and an agent B filled and held in separate chambers of a container, said two-agent type liquid bleaching compositions comprising:
- said agent A composed of hydrogen peroxide which contains 0.1 to 10% by weight, an acid agent and water;
- and
- said agent B composed of an alkali agent and water,
- wherein said agent A and said agent B meet the following conditions of (I) and (II), respectively:
- (I) A pH of said agent A ranges from 1 to 6.5 at 20° C. and a volume of aqueous 0.1 N sodium hydroxide solution required to adjust a pH of 1,000 ml of said agent A to 7 at 20° C. is from 50 to 1,000 m;
- and
- (II) A pH of said agent B ranges from 9 to 12 at 20° C. and a volume of aqueous 1 N sulfuric acid solution required to adjust a pH of 1,000 ml of said agent B to 7 at 20° C. is from 450 to 2,000 ml.
A method of bleaching an article, comprising mixing an agent A and an agent B with each other at a weight ratio ranging from 1/3 to 3/1 and then bringing the mixture into contact with the article:
- the agent A composed of constituents including hydrogen peroxide which contains 0.1 to 10% by weight, an acid agent and water, and satisfying the condition of (I) described below, and the agent B composed of constituents including an alkali agent and water, and indicating the condition of (II) described below,
- (I) A pH of said agent A ranges from 1 to 6.5 at 20° C. and a volume of aqueous 0.1 N sodium hydroxide solution required to adjust a pH of 1,000 ml of said agent A to 7 at 20° C. is from 50 to 1,000 ml;
- and
- (II) A pH of said agent B ranges from 9 to 12 at 20° C. and a volume of aqueous 1 N sulfuric acid solution required to adjust a pH of 1,000 ml of said agent B to 7 at 20° C. is from 450 to 2000 ml.
Dependencies are inferred from the claim text.