Composite for optical material, and optical material
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A technology of optical materials and compositions, applied in optics, optical components, instruments, etc., can solve problems such as loss, yellowness, and defects
Active Publication Date: 2012-08-15
MITSUBISHI GAS CHEM CO INC
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[0004] However, these thiol-containing compositions may change color to yellow when polymerized and cured
Since it is used for optical materials, if it becomes discolored after curing, it will be defective and cause a huge loss
Method used
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Embodiment 1～3
[0079] Using bis(β-epithiopropyl) sulfide with the total content of iron, chromium and nickel shown in Table 1, adopt the method of polymerization method A to make a flat plate with a thickness of 5mm, and compare it with the blank sample to obtain △ Yi. The results are summarized in Table 1.
Embodiment 4～6
[0081] Using the bis(β-epithiopropyl) sulfide with the total content of iron, chromium and nickel shown in Table 1, adopt the method of polymerization method B to make a flat plate with a thickness of 5mm, and compare it with the blank sample to obtain △ Yi. The results are summarized in Table 1.
Embodiment 7～9
[0083] Using bis(β-epithiopropyl) sulfide with the total content of iron, chromium and nickel shown in Table 1, adopt the method of polymerization method C to make a flat plate with a thickness of 5mm, and compare it with the blank sample to obtain △ Yi. The results are summarized in Table 1.
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Abstract
The invention relates to a composite for optical material, and optical material. The aim of the inventin is to provide an episulfide compound or a composite containing an episulfide compound for optical material, and the episulfide compound or the composite can be used for predicting the appearance of yellow after polymerized solidification in the stage prior to polymerized solidification and for quality determination. The total amount of iron, chrome and nickle contained in the episulfide compound or the composite containing an episulfide compound for optical material is less than 5.0ppm.
Description
technical field [0001] The present invention relates to compositions for optical materials, and more particularly, to compositions for optical materials suitable for plastic lenses, prisms, optical fibers, information recording substrates (substrates), and optical filters, especially plastic lenses. Background technique [0002] Because plastic materials are light, tough and easy to dye, they have been used in various optical materials, especially spectacle lenses, in recent years. For optical materials, especially spectacle lenses, the physical properties are low specific gravity, high transparency, low yellowness, high heat resistance, high strength, etc., and the optical properties are high refractive index and high Abbe number. A high refractive index can make the lens thinner, and a high Abbe number can reduce the chromatic aberration of the lens. However, as the refractive index increases, the Abbe number decreases, so studies are being carried out to increase both. ...
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