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

A technology for light-emitting diodes and resin compositions, applied in chemical instruments and methods, coatings, electrical components, etc., can solve the problems of decreased light reflectivity, disadvantage, high gold economy, etc., achieve excellent durability, and prevent illuminance from decreasing. Effect

Inactive Publication Date: 2013-01-30
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 an important issue 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 Pharmaceutical Co., Ltd., product name: オクブプ 18% 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 present invention. Anti-silver discoloration agent.

[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 obtaine...

Embodiment 13、14

[0169] 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.

[0170] Preparation of anti-silver discoloration resin composition:

[0171] With respect to 100 g of the addition-reaction type phenylmethyl polysiloxane resin having a hardness of 40 on a D-type durometer after curing, which is the same as that used in Example 1, 18% of Okab-Pu-Pb was prepared in advance in Table 3. The indicated concentration was added and mixed to obtain a sealing material, thereby producing a silver discoloration preventing resin composition.

[0172] Addition concentration is the addition ratio with respect to polysiloxane resin.

[0173] [table 3]

[0174]

[0175] Fabrication of LEDs:

[0176] Into a surface ...

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Abstract

Disclosed is a silver anti-tarnishing agent that contains at least one type of active ingredient selected from a group comprising: a zinc salt and / or a zinc complex; a zinc carboxylate preferably having 3 to 20 carbons; a zinc phosphate salt; a phosphate ester / zinc salt; and a carbonyl compound / zinc complex. Also disclosed is a silver anti-tarnishing method, or the like, for applying said silver anti-tarnishing agent to silver parts, preventing the discoloration of the silver parts. The silver anti-tarnishing agent and the silver anti-tarnishing method enable discoloration of silver parts, such as silver plating, due to sulfur gases to be prevented. The silver anti-tarnishing agent is especially useful as a silver anti-tarnishing agent for light-emitting diodes. Applying the silver anti-tarnishing agent to the silver parts, such as silver plating, of a light-emitting diode coats the silver parts, thereby preventing discoloration of the silver parts of the light-emitting diode, enabling a decrease in brightness to be prevented.

Description

technical field [0001] 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 [0002] 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 uses of fatty acid zinc compounds and aromatic carboxylate zinc compounds, stabilizers in vinyl chloride resin films and the like (Patent Document 2), condensation catalysts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/00C08K5/07C08K5/098C08K5/521C08L101/00C09D7/12C09D183/04C09K3/10H01L23/29H01L23/31H01L33/56C09D7/48C09D7/63
CPCC09D5/082C09D7/1233H01L33/56H01L33/60C08K5/098C23F11/1673C08G77/20H01L33/44C09D7/1241C08G77/12C08L83/04C23F11/124C09D7/63C09D7/48C08L83/00C08K5/07C08L101/00C23F11/00
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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