(METH)acrylate composition

a technology of acrylate and acrylate, which is applied in the field of composition, can solve the problems of damage to the light emitting element, no one has been used widely in practice, and the reflection decreases after a long-term use, and achieves excellent heat resistance and light resistance, less yellowing, and excellent whiteness.

Inactive Publication Date: 2013-09-12
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0023]The (meth)acrylate composition of the present invention provides a cured product having high reflectance in the visible light region with the excellent whiteness, the excellent heat resistance and light resistance, and with less yellowing, and having the excellent adhesion with adjacent parts (especially with a lead frame), thereby suitably used as a raw material of a reflective material for an optical semiconductor.
[0024]A reflective material made using the cured product obtained by curing the (meth)acrylate composition of the present invention does not decrease in its reflectance even after a long-term usage, while having high reflectance in the visible light region and the excellent adhesion with adjacent parts.

Problems solved by technology

However, the reflectance decreases after a long-term usage due to the deterioration of the resin caused by increase of heat generation and optical intensity which is resulted from enhanced output power of the LED.
But none of them has yet been used widely in practice.
Especially when a silicone resin is used, problems are concerned in association with evaporation of a low molecular weight siloxane which may cause a contact malfunction and penetration of water vapor into the luminescent device which may cause damage to the light emitting element.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0115]Materials used in respective components were: 6.5 g of hydrogenated polyisoprene diacrylate (tradename: SPIDA, manufactured by Osaka Organic Chemical Industry, Ltd.) as the component (A) ((meth)acrylate having a long-chain aliphatic hydrocarbon group); 3.5 g of 1-adamantyl methacrylate (tradename: Adamantate M-104, manufactured by Idemitsu Kosan Co., Ltd.) as the component (B); 0.5 g of glycidyl methacrylate (manufactured by Wako Pure Chemical Industries, Ltd.) as the component (C); 0.1 g of 1,1-bis(t-hexylperoxy)cyclohexane (tradename: Perhexa HC, manufactured by NOF Corp.) as the component (D); and 1 g of titanium dioxide (tradename: Tipaque PC-3, average particle diameter of 0.21 μm, manufactured by Ishihara Sangyo Kaisha, Ltd.) as the component (E). Firstly, the component (E) was added to the less viscous components (B), (C), and (D) and mixed using a planetary centrifugal mixer (tradename: Awatori-Rentaro, manufactured by Thinky Corp.). Then, the more viscous component (A...

example 2

[0117]A composition and a cured test piece were obtained by the method similar to that in Example 1 except that the amount of the component (C) was changed to 1 g. Result of the adhesion test is shown in Table 1.

example 3

[0118]A composition and a cured test piece were obtained by the method similar to that in Example 1 except that the amount of the component (C) was changed to 2 g. Result of the adhesion test is shown in Table 1.

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Abstract

Provided is a (meth)acrylate composition containing: (A) at least one (meth)acrylate compound selected from the group consisting of a (meth)acrylate-modified silicone oil, a (meth)acrylate having a long-chain aliphatic hydrocarbon group, and a polyalkylene glycol (meth)acrylate having number-average molecular weight of not less than 400; (B) a (meth)acrylate compound to which an alicyclic hydrocarbon group having 6 or more carbon atoms is ester-linked; (C) (meth)acrylic acid or a (meth)acrylate compound having a polar group; (D) a radical polymerization initiator; and (E) a white pigment.

Description

TECHNICAL FIELD[0001]The present invention relates to a composition which contains a (meth)acrylate compound, more specifically, to a composition suitably used as a raw material of a reflective material for an optical semiconductor and to a cured product thereof.BACKGROUND ART[0002]Since 1990s, progress of a light-emitting diode (LED) is remarkable whereby multicolor is progressing along with increase of output power. In particular, a white LED is expected to be a next generation light source to replace existing lamps such as a white lamp, a halogen lamp, and an HID lamp. In fact, an LED is valued in such characteristics as its long life, low power consumption, high heat stability, and low-voltage drive. Therefore, it is used in a display, a destination sign board, a car lamp, a signal light, an emergency light, a cell phone, a video camera, and so on. Such luminescent devices are usually manufactured by fixing an LED to a concave-shaped reflective material formed of a synthetic res...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01L33/46
CPCC08F220/12H01L33/60H01L2933/0033H01L33/46C08F290/062C08F220/10C08F230/08C08F220/325C08F20/10C08F20/12C08F290/04C08F290/06C08L33/04C08F220/04C08F224/00C08F230/02C08K3/22C08K2003/2241
Inventor IWASAKI, TAKESHIOGAWA, DAICHIOBATA, YUTAKATAKEBE, TOMOAKI
Owner IDEMITSU KOSAN CO LTD
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