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Composition for optical material

A technology of optical materials and compositions, applied in optics, optical components, organic chemistry, etc., can solve the problems of low yield, the improvement of rib and rib can not be said to be sufficient, etc., and achieve excellent balance of physical properties and increase productivity. Effect

Inactive Publication Date: 2015-11-25
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, striae may sometimes occur in high-degree lenses made of thiourethane resin, which may cause a decrease in yield. Proposals have been made on the type of polymerization catalyst, the method of addition, and the stabilizer of chemically unstable isocyanate. (Patent Documents 1 to 3)
However, the improvement of corrugation of thiourethane resin cannot be said to be sufficient, and further improvement in yield is pursued.

Method used

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  • Composition for optical material
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Examples

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Embodiment

[0042] Hereinafter, the present invention will be more specifically described by way of synthesis examples, examples, and comparative examples, but the present invention is not limited to these examples. In addition, the evaluation of the obtained casting liquid (composition for optical materials) and resin (optical materials) was performed by the following method.

[0043] Quantification of compound (a) and compound (b) in polythiol

[0044] Quantification was performed by the absolute calibration curve method using a capillary gas chromatograph (manufactured by Shimadzu Corporation, GC2010, detector: hydrogen flame ionization detector (FID)) equipped with DB-5MS (Agilent Technologies).

[0045] · Viscosity of casting liquid

[0046] Viscosity at 20° C. was measured using a B-type viscometer (TOKISANGYO CO., LTD., TV10M type).

[0047] ・Streak generation rate of optical materials containing thiourethane resin

[0048] A mercury lamp light source was transmitted through 100...

Synthetic example 1

[0054] 76.0 parts by mass of water and 90.0 parts by mass (1.08 mol) of a 48% by mass sodium hydroxide aqueous solution were charged into a 2L four-necked reaction flask equipped with a stirrer, a reflux condenser, a nitrogen blowpipe, and a thermometer. After adding 169 parts by mass (2.16 mol) of 2-mercaptoethanol dropwise over 30 minutes at 30°C, 99.9 parts by mass (1.08 mol) of epichlorohydrin was added dropwise over 3 hours at the same temperature to perform 1 hour to ripen. Next, 450.1 parts by mass (4.32 mol) of 36 mass % hydrochloric acid water and 304.5 parts by mass (4.00 mol) of thiourea were added, and it refluxed at 110 degreeC for 8 hours, and thiouronium saltization was performed. After condensing to 50° C., 450.0 parts by mass of toluene and 298 parts by mass (5.21 mol) of 28 mass % ammonia solution were added for hydrolysis to obtain a toluene solution of polythiol as the main component of compound (a). The toluene solution was acid-washed and washed with wat...

Synthetic example 2

[0056] 76.0 parts by mass of water and 90.0 parts by mass (1.08 mol) of a 48% by mass sodium hydroxide aqueous solution were charged into a 2L four-necked reaction flask equipped with a stirrer, a reflux condenser, a nitrogen blowpipe, and a thermometer. After adding 169 parts by mass (2.16 mol) of 2-mercaptoethanol dropwise over 10 minutes at 5°C, 99.9 parts by mass (1.08 mol) of epichlorohydrin was added dropwise over 1 hour at the same temperature, The temperature was raised to 30°C. Next, 450.1 parts by mass (4.32 mol) of 36 mass % hydrochloric acid water and 206 parts by mass (2.70 mol) of thiourea were added, and it refluxed at 110 degreeC for 30 minutes, and thiouronium saltization was performed. After cooling to 30°C, 450.0 parts by mass of toluene and 300 parts by mass (5.25 mol) of 28% by mass ammonia solution were added, and hydrolyzed at 50°C to obtain a toluene solution of polythiol as the main component of compound (b). The toluene solution was acid-washed and w...

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Abstract

According to the present invention, a composition for an optical material contains a compound (a), a compound (b), and a polyisocyanate compound (c), and can suppress the generation of striae defects. The compound (a) is a compound (1) having a structure represented by formula (1). The compound (b) is a compound (2) having a structure represented by formula (2).

Description

technical field [0001] The present invention relates to a composition for an optical material containing a specific polythiol compound and a polyisocyanate compound, and to an optical material containing a thiourethane resin obtained by polymerizing the composition for an optical material. Background technique [0002] Plastic materials are lightweight, tough, and easy to stain, so they have been used in various optical materials, especially eyeglass lenses, in recent years. For optical materials, among which the main properties required for spectacle lenses are low specific gravity, high transparency and low yellowness, high refractive index and high A multiple as optical properties, etc., thiourethane resins for optical lenses and Many applications have been filed for plastic lenses made of them, and lenses with a high refractive index, no coloring, and high transparency have been proposed. [0003] However, striae may sometimes occur in high-degree lenses made of thioure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/38G02B1/04C07C321/14C07C323/12
CPCC08G18/38C07C321/14C07C323/12G02B1/04G02B1/041C08G18/52C08G18/7642C08G18/3876C08L75/04C08L81/00
Inventor 西森庆彦嘉村辉雄堀越裕
Owner MITSUBISHI GAS CHEM CO INC
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