Alcyl epoxide and its production process and composition and LED sealing material

A technology of epoxy compound and manufacturing method, applied in the direction of organic chemistry, etc., can solve the problems of change, alicyclic epoxy compound short-wavelength transmittance reduction, etc.

Inactive Publication Date: 2008-01-09
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in the hydrogenation method using a noble metal catalyst, there is a problem that the transmittance of the obtained alicyclic epoxy compound (sealing material) decreases with time in the short wavelength region.
In addition, in the case of white LEDs, the color tone of white varies according to the distribution of transmittance in the visible light region.

Method used

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  • Alcyl epoxide and its production process and composition and LED sealing material
  • Alcyl epoxide and its production process and composition and LED sealing material
  • Alcyl epoxide and its production process and composition and LED sealing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] In a 1L induction stirring autoclave, 400g of bisphenol A type epoxy compound JapanEpoxy Resin Co., Ltd 'Epikote828EL' epoxy equivalent 186), 100g of tetrahydrofuran, 1.2g of 5% by weight rhodium / Graphite catalyst, after replacing the inside of the autoclave with nitrogen, then replace it with hydrogen. Then, the hydrogenation reaction was carried out under the conditions of 110° C. and 8 MPa hydrogen pressure. After 3 hours, the absorption of hydrogen gas had almost stopped.

[0081] A reaction solvent (tetrahydrofuran) was added to the obtained reaction mixture to dilute the epoxy resin concentration to 50% by weight, and then the hydrogenation catalyst was filtered out from the reaction mixture using a 5C filter paper. That is, filtration was performed at a filtration pressure of 0.05 MPa using a 1 L filter. Filtration time takes 1 hour. Then, 16 g of activated carbon (dried product of "Taiko K" manufactured by Futimura Chemical Co., Ltd.) was added to the reacti...

Embodiment 2

[0083] The same operation as in Example 1 was carried out except that the amount of activated carbon in Example 1 was changed from 16 g to 24 g. The results are shown in Table 1 and Table 2.

Embodiment 3

[0085] The same operation as in Example 1 was performed except that the reaction solvent in Example 1 was changed from tetrahydrofuran to ethyl acetate, and the amount of activated carbon was changed from 16 g to 4 g. The results are shown in Table 1 and Table 2.

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Abstract

The present invention relates to alicyclic epoxy compounds obtained by selectively hydrogenating aromatic rings of aromatic epoxy compounds in the presence of a hydrogenation catalyst, the concentration of the platinum group element in the product alicyclic epoxy compound being not more than 2 ppm.

Description

technical field [0001] The present invention relates to an alicyclic epoxy compound, a method for producing the same, an alicyclic epoxy resin composition, and a sealing material for light-emitting diodes (sealing material for LEDs). Background technique [0002] Because epoxy compounds have good heat resistance, adhesion, water resistance, mechanical strength, and electrical properties, they are used in various fields such as adhesives, coatings, civil engineering materials, and insulating materials for electrical and electronic components. kind of field. [0003] The above-mentioned epoxy compounds are generally aromatic epoxy resins such as bisphenol A diglycidyl ether, bisphenol F diglycidyl ether, phenol or cresol-novolak type epoxy resin. [0004] On the other hand, LEDs are used in various display panels, light sources for image reading, traffic signals, large-scale display devices, and the like. In an LED light-emitting device, it is generally sealed with a transpa...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C07D301/00C07D303/02C08G59/20C08G59/14
CPCC08G59/1405
Inventor村井浩也西峰雄本田昌幸
OwnerMITSUBISHI RAYON CO LTD