Dispersion powder and method for producing the same, heat ray shielding resin molded product, and heat ray shielding laminate
AssigneeSumitomo Metal Mining Co., Ltd.
InventorsKoyo YAMADA, Takafumi ITO, Takeshi CHONAN
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Abstract
A dispersion powder containing composite tungsten oxide fine particles represented by a general formula MxWOy, having a hexagonal crystal structure, having a crystallite size of 15 nm or more and 80 nm or less, and surface-modified with an acrylic dispersant, wherein a weight ratio of the dispersant to the composite tungsten oxide fine particles is in a range of 0.3≤(weight of dispersant/weight of composite tungsten oxide fine particles)<3.0, and heat ray shielding resin molded product and heat ray shielding laminate produced using the dispersed powder.
Claims11
A dispersion powder containing composite tungsten oxide fine particles represented by a general formula MxWOy (wherein M element is one or more elements selected from group 1, group 2, and group 13 elements in a periodic table, satisfying 0.1≤x≤1.0, 2.0≤y<4.0), having a hexagonal crystal structure, having a crystallite size of 15 nm or more and 80 nm or less, and surface-modified with an acrylic dispersant,
- wherein a weight ratio of the dispersant to the composite tungsten oxide fine particles is in a range of 0.3≤(weight of dispersant/weight of composite tungsten oxide fine particles)<3.0.
A method for producing a dispersion powder, the method comprising:
- adding composite tungsten oxide fine particles having a hexagonal crystal structure and represented by a general formula MxWOy (wherein M element is one or more elements selected from group 1, group 2, and group 13 elements in a periodic table, satisfying 0.1≤x≤1.0, 2.0≤y<4.0) and an acrylic dispersant, to an organic solvent, and then pulverizing and dispersing a mixture, to produce a dispersion liquid in which the composite tungsten oxide fine particles have a crystallite size of 15 nm or more and 80 nm or less;
- and
- removing the organic solvent from the dispersion liquid to produce a dispersion powder in which a weight ratio of the dispersant to the composite tungsten oxide fine particles is in a range of 0.3≤(weight of dispersant/weight of composite tungsten oxide fine particles)<3.0.
Dependencies are inferred from the claim text.