Liquid composition and glass article
View Patent ↗There are provided a liquid composition capable of forming a coating film securing colorless transparency, being excellent in weather resistance, suppressing occurrence of bleedout, and having sufficiently ultraviolet absorbing function and the infrared absorbing function, and a glass article having a coating film formed by this composition. A liquid composition for forming a coating film contains an infrared absorbent selected from a tin-doped indium oxide, an antimony-doped tin oxide, and a composite tungsten oxide; an ultraviolet absorbent selected from a benzophenone-based compound, a triazine-based compound, and a benzotriazole-based compound; predetermined amount of a dispersing agent having a molecular weight of 1,000 to 100,000; predetermined amount of a chelating agent relative forming a complex with the infrared absorbent and having a molecular weight of 1,000 to 100,000, the complex exhibiting substantially no absorption with respect to light having a visible wavelength; a binder component; and a liquid medium.
1. A liquid composition for forming a coating film, the liquid composition comprising:
an infrared absorbent (a) containing one or more oxides selected from the group consisting of a tin-doped indium oxide, an antimony-doped tin oxide, and a composite tungsten oxide;
an ultraviolet absorbent (b) containing one or more compounds selected from the group consisting of a benzophenone-based compound, a triazine-based compound, and a benzotriazole-based compound;
5 to 15 parts by mass of a dispersing agent (c) relative to 100 parts by mass of the infrared absorbent (a), the dispersing agent having a molecular weight of 1,000 to 100,000;
1 to 13 parts by mass of a chelating agent (d) relative to 100 parts by mass of the infrared absorbent (a), the chelating agent being capable of forming a complex with the infrared absorbent (a) and having a molecular weight of 1,000 to 100,000, the formed complex exhibiting substantially no absorption with respect to light having a visible wavelength;
a binder component (e); and
a liquid medium (f).
2. The liquid composition according to claim 1 , comprising the infrared absorbent (a) in a ratio of 1 to 80 parts by mass and the ultraviolet absorbent (b) in a ratio of 1 to 50 parts by mass, relative to 100 parts by mass of the binder component (e).
3. The liquid composition according to claim 1 , comprising a hydroxylated benzophenone-based compound as the ultraviolet absorbent (b).
4. The liquid composition according to claim 1 , comprising, as the ultraviolet absorbent (b), one or more compounds selected from the group consisting of a benzophenone-based compound, a triazine-based compound and a benzotriazole-based compound which comprise a silyl group having a hydrolyzable group.
5. The liquid composition according to claim 1 , wherein the infrared absorbent (a) is a tin-doped indium oxide.
6. The liquid composition according to claim 1 , wherein the chelating agent (d) is a polymer constituted of one or more monomers selected from the group consisting of a maleic acid, an acrylic acid, and a methacrylic acid.
7. The liquid composition according to claim 1 , wherein the binder component (e) is mainly constituted of a material component for forming silicon oxide-based matrix.
8. The liquid composition according to claim 7 , wherein the binder component (e) further contains polyepoxides.
9. A glass article, comprising a glass substrate and a coating film formed on a surface of at least a part of the glass substrate by using the liquid composition according to claim 1 .
10. The glass article according to claim 9 , wherein a film thickness of the coating film is 1.0 μm to 7.0 μm.