Liquid concentrate for cleaning composition, cleaning composition and cleaning method

A cleaning composition intended for cleaning an object to be cleaned in a clouded state, the cleaning composition comprising 100 parts by weight of a liquid concentrate for cleaning composition and 50 to 1900 parts by weight of water,

• wherein the liquid concentrate for cleaning composition includes, as organic solvents, at least a first organic solvent and a second organic solvent;
• the first organic solvent is at least one compound selected from the group consisting of a hydrophobic glycol ether compound, a hydrophobic hydrocarbon compound, a hydrophobic aromatic compound, a hydrophobic ketone compound and a hydrophobic alcohol compound, which has a boiling point in the range of 140° C. to 190° C. and a solubility in water (measurement temperature:
• 20° C.) of 50% by weight or less;
• the second organic solvent is a hydrophilic amine compound having a boiling point in the range of 140° C. to 190° C. and a solubility in water (measurement temperature:
• 20° C.) of greater than 50% by weight;
• the amount of incorporation of the second organic solvent is adjusted to a value in the range of 0.3 parts to 30 parts by weight relative to 100 parts by weight of the first organic solvent;
• in case further comprising, as a third organic solvent, at least one compound selected from the group consisting of a hydrophilic glycol ether compound, a hydrophilic alcohol compound, a hydrophilic nitrogen-containing compound and a hydrophilic sulfur-containing compound, which has a boiling point in the range of 140° C. to 190° C. and a solubility in water (measurement temperature:
• 20° C.) of 50% by weight or greater, the amount of incorporation of the third organic solvent is adjusted to a value in the range of 150 parts by weight or less relative to 100 parts by weight of the first organic solvent;
• and
• the amount of incorporation of an organic solvent which has a boiling point of higher than 190° C. is adjusted to a value of 0 parts by weight, or a value in the range of 0 parts to 15 parts by weight (provided that 0 parts by weight is excluded), relative to 100 parts by weight of the first organic solvent.

A cleaning method comprising:

• a step for mixing 100 parts by weight of a liquid concentrate for cleaning composition with 50 parts to 1900 parts by weight of water;
• and
• a step for cleaning an object to be cleaned in a clouded state,
• wherein the liquid concentrate for cleaning composition includes, as organic solvents, at least a first organic solvent and a second organic solvent;
• the first organic solvent is at least one compound selected from the group consisting of a hydrophobic glycol ether compound, a hydrophobic hydrocarbon compound, a hydrophobic aromatic compound, a hydrophobic ketone compound and a hydrophobic alcohol compound, which has a boiling point in the range of 140° C. to 190° C. and a solubility in water (measurement temperature:
• 20° C.) of 50% by weight or less;
• the second organic solvent is a hydrophilic amine compound having a boiling point in the range of 140° C. to 190° C. and a solubility in water (measurement temperature:
• 20° C.) of greater than 50% by weight;
• the amount of incorporation of the second organic solvent is adjusted to a value in the range of 0.3 parts to 30 parts by weight relative to 100 parts by weight of the first organic solvent;
• in case further comprising, as a third organic solvent, at least one compound selected from the group consisting of a hydrophilic glycol ether compound, a hydrophilic alcohol compound, a hydrophilic nitrogen-containing compound and a hydrophilic sulfur-containing compound, which has a boiling point in the range of 140° C. to 190° C. and a solubility in water (measurement temperature:
• 20° C.) of 50% by weight or greater, the amount of incorporation of the third organic solvent is adjusted to a value in the range of 150 parts by weight or less relative to 100 parts by weight of the first organic solvent;
• and
• the amount of incorporation of an organic solvent which has a boiling point of higher than 190° C. is adjusted to a value of 0 parts by weight, or a value in the range of 0 parts to 15 parts by weight (provided that 0 parts by weight is excluded), relative to 100 parts by weight of the first organic solvent.