Light stabilizer emulsion composition

1. A light stabilizer emulsion composition comprising:

water;

at least one of a light stabilizer and a UV absorber; and

an emulsifier comprising a nonionic surfactant (A) and a nonionic surfactant (B), wherein the nonionic surfactant (B) comprises a sorbitan ester-based compound, wherein the content of the emulsifier is within a range of 40 parts by mass (weight) (exclusive) to 100 parts by mass (weight) (inclusive) with respect to 100 parts by mass (weight) of the light stabilizer and/or UV absorber, and wherein the amount of the nonionic surfactant (A) accounts for 50 to 100 weight % of the total amount of the emulsifier;

wherein components constituting the light stabilizer emulsion composition have an average particle size of 150 nm or less.

2. The light stabilizer emulsion composition according to claim 1 , wherein the nonionic surfactant (A) has a polyether chain containing an oxyethylene group and an oxyalkylene group having 3 or more carbon atoms and has a hydrocarbon group.

3. The light stabilizer emulsion composition according to claim 1 , wherein the nonionic surfactant (A) comprises a compound represented by the following formula (1):

R—O-(AO) n —H  (1),

wherein R represents a hydrocarbon group having 8 to 30 carbon atoms, A represents two or more alkylene groups each having 2 to 4 carbon atoms, ethylene groups account for 50 mol % or more of A, and n represents a number of from 8 to 80.

4. The light stabilizer emulsion composition according to claim 3 , wherein R represents an aliphatic hydrocarbon group having 8 to 16 carbon atoms and n represents 8 to 30 in the formula (1).

5. The light stabilizer emulsion composition according to claim 1 , wherein the nonionic surfactant (B) further comprises a compound represented by the following formula (2):

H-(EO) p —(PO) q -(EO) r —OH  (2),

wherein EO represents an oxyethylene group, PO represents an oxypropylene group, q represents a number of 20 to 80, p and r each independently represent a number of 2 to 32, and oxyethylene groups account for 30 wt % or less of the total compound.

6. The light stabilizer emulsion composition according to claim 1 , wherein the at least one light stabilizer comprises a hindered amine compound.

7. The light stabilizer emulsion composition according to claim 1 , wherein the content of the at least one light stabilizer and the UV absorber is within a range of 1 to 50 weight %.

8. An aqueous coating agent composition comprising the light stabilizer emulsion composition according to claim 1 .

9. A coated product comprising a coating film formed of the aqueous coating agent composition according to claim 8 .

10. The light stabilizer emulsion composition according to claim 2 , wherein the nonionic surfactant (A) comprises a compound represented by the following formula (1):

R—O-(AO) n —H  (1),

wherein R represents a hydrocarbon group having 8 to 30 carbon atoms, A represents two or more alkylene groups each having 2 to 4 carbon atoms, ethylene groups account for 50 mol % or more of A, and n represents a number of from 8 to 80.

11. A light stabilizer emulsion composition comprising:

water;

at least one of a light stabilizer and a UV absorber;

an antioxidant;

a solvent other than water;

an antiseptic; and

an emulsifier comprising a nonionic surfactant (A) and a nonionic surfactant (B), wherein the nonionic surfactant (B) comprises a sorbitan ester-based compound, wherein the content of the emulsifier is within a range of 40 parts by mass (weight) (exclusive) to 100 parts by mass (weight) (inclusive) with respect to 100 parts by mass (weight) of the light stabilizer and/or UV absorber, and wherein the amount of the nonionic surfactant (A) accounts for 50 to 100 weight % of the total amount of the emulsifier;

wherein components constituting the light stabilizer emulsion composition have an average particle size of 150 nm or less.