Nanoparticle-containing solution and use thereof
A nanoparticle-containing solution comprising nanoparticles of a metal oxide, and a solution obtained by dissolving, in an organic solvent, a phosphoric acid ester and a reactive group-containing carbonyl compound as hydrophobic treatment agents, the phosphoric acid ester having an alkylene oxide chain, and an alkyl group or allyl group at an end, and the reactive group-containing carbonyl compound having at least a vinyl group and a carboxyl group or cyclic ester group, and having a solubility parameter calculated by Fedors' method of 10.0 to 12.5.
1. Nanoparticle-containing resin particles comprising:
a resin, and
metal oxide nanoparticles dispersed within the resin,
the metal oxide nanoparticles being hydrophobized with a phosphoric acid ester and a reactive group-containing carbonyl compound, wherein:
the phosphoric acid ester is a compound represented by the following general formula (I):
where:
R 1 is an alkyl group having 8 to 13 carbon atoms or an allyl group,
R 2 is H or CH 3 ,
n is 1 to 30, and
the compound is a mixture in which a combination of a and b is a combination of 1 and 2 or 2 and 1; and
the reactive group-containing carbonyl compound is selected from:
a reactive group-containing carboxylic acid represented by the following general formula (II):
CH 2 ═CR 3 —Z—COOH (II)
where:
R 3 is H or CH 3 , and
Z is a divalent hydrocarbon group of 5 or more carbon atoms optionally containing an ester group; and
a reactive group-containing cyclic ester represented by the following general formula (III):
CH 2 ═CR 3 —X-M (III)
where:
R 3 is H or CH 3 ,
X is a divalent hydrocarbon group of 1 or more carbon atoms optionally containing an ester group, and
M is a lactone or a lactide.
2. A coating material, comprising the nanoparticle-containing resin particles according to claim 1 , a binder resin, and a solvent.
3. A light diffusing film obtained by drying the coating material according to claim 2 .
4. A molded article comprising the nanoparticle-containing resin particles according to claim 1 and a transparent resin.
5. The nanoparticle-containing resin particles of claim 1 , wherein:
the reactive group-containing carbonyl compound has a solubility parameter calculated by Fedors' method of 10.0 to 12.5.
6. The nanoparticle-containing resin particles according to claim 1 , wherein the reactive group-containing carbonyl compound is:
a reactive group-containing carboxylic acid represented by the following general formula (II)′:
CH 2 ═CR 3 COOC 2 H 4 O—C(═O)—O—C x H y —COOH (II)′
where:
R 3 is H or CH 3 ,
x=2 to 6, and
y=any of x−2, 2x, and 2x−2, or
the reactive group-containing cyclic ester.
7. The nanoparticle-containing resin particles according to claim 5 , wherein the metal oxide is zirconium oxide.
8. The nanoparticle-containing resin particles according to claim 5 , wherein the phosphoric acid ester and the reactive group-containing carbonyl compound are contained in the nanoparticle-containing resin particles at a weight % ratio of 5:95 to 70:30.