Hydrophilization treatment agent composition

2:

• The hydrophilization treatment agent composition according to claim 1, wherein the composition further comprises (C) a polyvalent metal ion.

3:

• The hydrophilization treatment agent composition according to claim 2, wherein (C) is a divalent metal ion.

4:

• The hydrophilization treatment agent composition according to claim 2, wherein a molar ratio of (C) to the total of (A) and (B), (C)/[(A)+(B)], is 0.2 or more and 4 or less.

5:

• The hydrophilization treatment agent composition according to claim 1, wherein (A) is one or more branched anionic surfactants selected from the group consisting of an internal olefin sulfonate salt, a secondary alkane sulfonate salt and a dialkyl sulfosuccinate salt.

6:

• The hydrophilization treatment agent composition according to claim 1, wherein the composition comprises (A) in an amount of 0.001 mass % or more and 60 mass % or less.

7:

• The hydrophilization treatment agent composition according to claim 1, wherein the composition is for use on hard surfaces.

8:

• The hydrophilization treatment agent composition according to claim 1, wherein (B) is a cationic surfactant having two hydrocarbon groups with 6 or more and 14 or less carbons.

9:

• The hydrophilization treatment agent composition according to claim 1, wherein (B) is a cationic surfactant represented by the following general formula (B):
• wherein two of R1b, R2b, R3b and R4b are hydrocarbon groups with 6 or more and 14 or less carbons and the remaining two are hydrocarbon groups with 1 or more and 3 or less carbons;
• and X− is a counter ion.

10:

• A method for hydrophilizing a solid surface, comprising contacting the solid surface with a treatment liquid comprising (A) a branched anionic surfactant, (B) a di-long chain hydrocarbon cationic surfactant, and water, in which a molar ratio of (B) to a total of (A) and (B), (B)/[(A)+(B)], is 0.1 or more and 0.8 or less.

11:

• The hydrophilizing method according to claim 10, wherein the treatment liquid further comprises (C) a polyvalent metal ion.

12:

• The hydrophilizing method according to claim 11, wherein (C) is a divalent metal ion.

13:

• The hydrophilizing method according to claim 11, wherein a molar ratio of (C) to the total of (A) and (B), (C)/[(A)+(B)], is 0.2 or more and 4 or less.

14:

• The hydrophilizing method according to claim 11, wherein the treatment liquid is obtained by mixing a composition comprising the component (A), the component (B) and water with a composition comprising the component (C) and water.

15:

• The method for hydrophilizing a solid surface according to claim 10, wherein the solid surface is a solid surface of a hard article.

16:

• The method for hydrophilizing a solid surface according to claim 10, wherein the solid surface is rinsed with water after the solid surface is contacted with the treatment liquid.

(canceled)