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Silver anti-tarnishing agent, silver anti-tarnishing resin composition, silver anti-tarnishing method, and light-emitting diode using same

A technology of light-emitting diodes and anti-silver discoloration, which is applied in coatings, electrical components, circuits, etc., can solve the problems of reduced light reflectivity, high economical efficiency of gold, disadvantages, etc., and achieve the effect of preventing illumination reduction and excellent durability

Inactive Publication Date: 2014-09-24
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of gold is higher than that of silver, which is disadvantageous in terms of economics, and another big problem is that there is a major problem that the reflectance of light is greatly reduced (generally considered to be as high as several tens% at most) due to the change to gold plating.

Method used

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  • Silver anti-tarnishing agent, silver anti-tarnishing resin composition, silver anti-tarnishing method, and light-emitting diode using same
  • Silver anti-tarnishing agent, silver anti-tarnishing resin composition, silver anti-tarnishing method, and light-emitting diode using same
  • Silver anti-tarnishing agent, silver anti-tarnishing resin composition, silver anti-tarnishing method, and light-emitting diode using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 3

[0140] Examples 1 to 3 specifically show the anti-silver discoloration agent when coating the surface of silver.

[0141] Preparation of anti-silver discoloration agent solution:

[0142] Zinc 2-ethylhexanoate (manufactured by Hope Pharmaceuticals, product name: Oktop 18% sub-lead) as an active ingredient of the anti-silver discoloration agent was dissolved in acetone at the concentration shown in Table 1 to prepare the anti-silver discoloration agent of the present invention.

[0143] [Table 1]

[0144]

[0145] Fabrication of LEDs:

[0146] The solution of Example 1 was dropped into a surface mount type (hereinafter abbreviated as SMD (Surface Mounted Devices)) light-emitting diode package with an opening of φ5 mm, silver-plated wiring on the lead frame, and a chip with a central emission wavelength of 465 nm. 0.015g (the active ingredient amount is 0.0000015g), and the resulting light-emitting diode is packaged and placed in a drier at 80° C. for 1 hour, making the SMD...

Embodiment 4 to 12、 comparative example 1、2

[0161]The same operation as in Example 1 prepares the anti-silver discoloration agent solution of the embodiment 4 to 12 of the composition shown in table 2, and uses this solution, and the same operation as in Example 1 uses sealing resin on the dry film of this anti-silver discoloration agent Sealing is performed to produce light-emitting diodes. In addition, a vulcanization test was carried out in the same manner as in Example 1, and the results are described in Table 2 together with the composition of the silver discoloration preventing agent used. In addition, the test results of Comparative Examples 1 and 2 that did not use the anti-silver discoloration agent of the present invention are also shown in Table 2.

[0162] In addition, the addition reaction type phenylmethylpolysiloxane resin used for sealing in Examples 7 to 12 (the hardness of the D-type durometer after curing is 60) was obtained by mixing the following A liquid and B liquid in a weight ratio It is obtain...

Embodiment 13、14

[0168] Next, as embodiment 13,14, prepare the anti-silver discoloration resin composition (a kind of mode of anti-silver discoloration agent of the present invention) containing zinc compound (zinc salt and / or zinc complex) and sealing resin, and use The composition seals light-emitting diodes to study the anti-silver discoloration effect.

[0169] Preparation of anti-silver discoloration resin composition:

[0170] With respect to 100 g of the addition-reaction type phenylmethylpolysiloxane resin having a hardness of 40 on the D-type durometer after curing as used in Example 1, 18% of Octopus lead was prepared in advance with the formula shown in Table 3. Concentration is added and mixed to obtain a sealing material, thereby making an anti-silver discoloration resin composition.

[0171] Addition concentration is the addition ratio with respect to polysiloxane resin.

[0172] [table 3]

[0173]

[0174] Fabrication of LEDs:

[0175] Into a surface mount type (hereinaft...

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Abstract

The present invention relates to a silver anti-tarnish agent having, as an effective component, a zinc salt and / or a zinc complex, preferably at least one kind selected from the group consisting of a carboxylic acid zinc salt having a carbon atom number of 3 to 20, a phosphoric acid zinc salt, a phosphate ester zinc salt and a carbonyl compound zinc complex; a silver anti-tarnish method for preventing tarnish of a silver part by applying said silver anti-tarnish agent to the silver part. According to the present invention, tarnish of a silver part such as a silver-plated part due to a sulfur-based gas can be prevented. The present invention is useful particularly as a silver anti-tarnish agent for a light-emitting diode and allows preventing tarnish of a silver part of a light-emitting diode and reduction in illuminance by applying the silver anti-tarnish agent of the present invention to a silver part such as a silver-plated part of a light-emitting diode for covering the silver part.

Description

[0001] This application is a divisional application of a Chinese patent application with an application date of April 20, 2011 and an application number of 201180019856.8. technical field [0002] The invention relates to an anti-tarnish agent for silver or silver-plated parts, in particular to an anti-tarnish agent for silver or silver-plated parts used in light-emitting diodes, an anti-tarnish resin composition, an anti-tarnish method, and a light-emitting diode using the anti-tarnish agent for silver . Background technique [0003] As a representative substance among organic zinc compounds, fatty acid zinc compounds (for example, zinc stearate) and other compounds called metal soaps are known to be used as synthetic resins, lubricants in tablet molding or Use of release agents. In addition, as an aromatic carboxylate zinc compound, for example, zinc benzoate, use as an antibacterial agent is known as a characteristic of the compound itself (Patent Document 1). As common...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/12C23F11/167H01L33/44H01L33/60C09D7/48C09D7/63
CPCH01L33/60C08G77/20C09D7/1233C08K5/098C23F11/1673C09D7/1241C08L83/04C08G77/12C23F11/124H01L33/56H01L33/44C09D7/63C09D7/48C08L83/00C08K5/07C08L101/00C23F11/00
Inventor 川田义浩佐佐木智江枪田正人青木静中西政隆
Owner NIPPON KAYAKU CO LTD
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