Preparation of copper benzoyl acetonate_Kain Industrial Additive

Background and overview^[1]

Copper benzoyl acetonate can be used as pharmaceutical intermediates and organic synthesis intermediates, and can be used in the preparation of optical materials and laboratory research and development processes.

Preparation^[1]

Copper benzoyl acetonate is prepared as follows: prepare 100cc n-hexane as a solvent, add 150g copper (I) chloride to the solvent, and stir the mixture thoroughly to obtain a uniform suspension. At room temperature, 70 g of benzoyl phenyl ketone was added to the suspension while slowly adding a small amount and adding it all within 1 hour. The suspension was heated to reflux at 70°C, and the reaction solution was filtered. The solvent was removed from the filtrate obtained by reducing the pressure at 20 Torr for 1 hour. The remaining residue was recrystallized from 100 cc of n-hexane to obtain crystals of copper bisbenzoyl acetonate.

Apply^[1]

Copper benzoyl acetonate can be used to prepare optical materials: 60g of methyl methacrylate (hereinafter referred to as B1), 30g of tetraethylene glycol dimethacrylate (hereinafter referred to as B2) and 10g of methacrylate Glycidyl acrylate (hereinafter referred to as B3) was mixed and stirred evenly at 25°C. I did add 5g of copper benzoyl acetonate as component A to the mixed solution of component B, and stirred at 25°C for 1 hour to completely dissolve it. Furthermore, 1.0 g of NOFMERMSD (manufactured by NOFCorporation) as a polymerization regulator was added to the mixed solution and stirred, and then tert-butylperoxy 2-ethylhexanoate (hereinafter referred to as C1) was used as the C component. Add 1.0g), stir the mixture thoroughly and homogeneously to prepare a polymer composition. The prepared polymer composition was poured into the gap of the molding mold, two flat glass molds with the same outer shape were held at a distance of 2.2 mm in the gap of the molding mold, and the outer peripheral parts were sealed with tape.

Place the injected mold in an atmospheric pressure furnace, and increase the temperature from 30°C to 100°C within 10 hours to polymerize and solidify the polymer composition. Then, after taking out the mold from the atmospheric furnace and taking out the cured product from the glass mold, annealing was performed by heating at a temperature of 100° C. for 30 minutes to produce a plate-shaped optical material with a thickness of 2 mm. The obtained optical material was transparent while appearing blue, and no appearance abnormalities such as turbidity were observed. In addition, when the spectrum was measured, the transmittance of ultraviolet light of 380 nm or less was 10% or less, and almost all ultraviolet rays were absorbed, so it was confirmed that it has an ultraviolet absorption function. In addition, visible light from 400 to 650nm has a transmittance of 30 to 80%, and it is confirmed that visible light is almost transmitted, and the area from 700 to 1000nm from near infrared to infrared is 10% or less. It was confirmed that it can be used as a near-infrared absorption filter since it only absorbs and almost absorbs.

Main reference materials

[1] (JP2007191602) POLYMERIZABLE COMPOSITION, OPTICAL MATERIAL AND OPTICAL PRODUCT OBTAINED BY POLYMERIZING AND CURING THE POLYMERIZABLE COMPOSITION