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Composition for resin

一种固化性组合物、化合物的技术，应用在仪器、眼镜/护目镜、光学等方向，能够解决组合物粘度上升、铸型聚合操作困难、粘度上升等问题

Active Publication Date: 2008-05-07
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after prepolymerization and degassing, the viscosity of the composition will increase
In particular, when the refractive index is increased by increasing the amount of inorganic compounds containing sulfur atoms and / or selenium atoms, the viscosity rises significantly, making it very difficult to carry out normal mold polymerization operations such as filtration or mold injection.

Method used

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  • Composition for resin
  • Composition for resin
  • Composition for resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0155] 20 parts by weight of sulfur (A1) as inorganic compound A and 80 parts by weight of bis(β-epithiopropyl)sulfide (B1) as compound B were fully mixed at 65° C. to be uniform. Then, 0.5 parts by weight of 2-mercapto-1-methylimidazole (prepolymerization catalyst) was added, and prepolymerization was performed at 60° C. for about 1 hour until the refractive index (20° C.) of the reaction system became 1.679. After cooling at 20°C, to the obtained composition were added 5 parts by weight of benzylmercaptan (C1) as compound C, 0.03 parts by weight of triethylbenzyl ammonium chloride (polymerization catalyst), and 0.2 parts by weight of The solution of di-n-butyltin dichloride (polymerization regulator), mix thoroughly and evenly. The obtained curable composition was degassed at 10 Torr and 20° C. for 10 minutes. The obtained degassing curable composition was filtered through a 0.5 μm PTFE membrane filter, and injected into a flat-plate mold having a thickness of 2.5 mm consis...

Embodiment 2-3

[0157] Example 1 was repeated except that the amount of compound C (C1) was varied. Table 1 shows the results of each evaluation.

Embodiment 4-9

[0159] Example 1 was repeated except that the species of compound C was changed. Table 1 shows the results of each evaluation.

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Abstract

The present invention relates to a curable composition which comprises 1 to 50 parts by weight of an inorganic compound (A) having a sulfur or selenium atom and 50 to 99 parts by weight of a compound (B) represented by the general formula (1): [wherein m is an integer of 0 to 4; and n is an integer of 0 to 2] (with the proviso that the total amount of the compounds (A) and (B) is 100 parts by weight) and which further contains at least one compound (C) selected from the group consisting of thiol compounds each having one SH group and disulfide compounds (except the compound (B)) each having one or more disulfide linkages in an amount of 1 to 20 parts by weight per 100 parts by weight of the total amount of the compounds (A) and (B). The curable composition little causes viscosity increase in prepolymerization or deaeration, and can be therefore cast-polymerized by easy operation into optical elements and so on.

Description

technical field [0001] The present invention relates to a curable composition containing an inorganic compound having a sulfur atom and / or a selenium atom, and an optical material having a high refractive index and a high Abbe number obtained by polymerizing and curing the curable composition. The optical material can be used in optical products such as plastic lenses, prisms, optical fibers, information recording substrates, optical filters, adhesives, etc., especially in plastic lenses for spectacles. Background technique [0002] Plastic materials have the characteristics of light weight, strong toughness, and easy dyeing, so in recent years they have been widely used in various optical materials, especially eyeglass lenses. The most important properties required of optical materials, especially spectacle lenses, are high refractive index and high Abbe number. The high refractive index can realize the thinning of the lens, and the high Abbe number can reduce the chromati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G75/08G02B1/04G02C7/02
CPCC08G75/08G02B1/04C08L81/00C08K3/30C08L81/02
Inventor 嘉村辉雄竹内基晴城野正博
Owner MITSUBISHI GAS CHEM CO INC
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