Curable silicone composition for light reflective material, cured silicone resin, reflector, and LED device

A technology of light-reflecting material and silicone composition, applied in the direction of semiconductor devices, electrical components, circuits, etc., can solve the problems of difficult to form fine structures, lack of fluidity, high temperature, etc., and achieve excellent thermal stability and heat resistance. The effect of excellent discoloration and high fluidity

Active Publication Date: 2022-03-29
SHIN ETSU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although these solid materials have excellent heat resistance and mechanical properties, they lack fluidity at room temperature, so there are problems in handling and workability, such as high temperatures are required for molding.
In addition, since these solid materials also lack fluidity at high temperatures, there are also technical problems such as difficulty in forming fine structures or large-area structures.

Method used

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  • Curable silicone composition for light reflective material, cured silicone resin, reflector, and LED device
  • Curable silicone composition for light reflective material, cured silicone resin, reflector, and LED device
  • Curable silicone composition for light reflective material, cured silicone resin, reflector, and LED device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0095]

[0096] Component (A-1) of the curable silicone composition for light reflection materials of the present invention can be obtained as an addition reaction product having at least two addition-reactive carbon-carbon double bonds in one molecule and not having SiH , in the presence of a hydrosilylation reaction catalyst, 1 mole of the above-mentioned raw material (a) having 2 SiH in one molecule and more than 1 mole and 10 moles or less, preferably more than 1 mole and 5 moles or less It is obtained by addition-reacting the said raw material (b) which has two addition-reactive carbon-carbon double bonds in excess one molecule.

[0097] In addition to the addition-reactive carbon-carbon double bond derived from the raw material (b), the (A-1) component obtained in the above manner can also contain R 1 ) of the addition-reactive carbon-carbon double bond, so one molecule contains at least 2 addition-reactive carbon-carbon double bonds, the number of which is preferably...

Embodiment

[0193] Examples and comparative examples are shown below to describe the present invention in detail, but the present invention is not limited by the following examples. In addition, in the following examples, the viscosity is a value at 25° C. measured using a screw viscometer (manufactured by Malcom Co., Ltd., model: PC-1T) as a rotational viscometer.

[0194] Symbols indicating the composition of silicone oil or silicone resin in the following examples are shown below. In addition, the number of moles of each silicone oil or each silicone resin represents the number of moles of vinyl groups or silicon atom-bonded hydrogen atoms contained in each component.

[0195] m H :(CH 3 ) 2 HSio 1 / 2

[0196] m Vi :(CH 2 =CH)(CH 3 ) 2 SiO 1 / 2

[0197] m ViΦ :(CH 2 =CH)(C 6 h 5 )(CH 3 ) SiO 1 / 2

[0198] D. H :(CH 3 )HSiO 2 / 2

[0199] D. Φ :(C 6 h 5 )(CH 3 ) SiO 2 / 2

[0200] D. 2Φ :(C 6 h 5 ) 2 SiO 2 / 2

Synthetic example 1

[0201] [Synthesis Example 1] Preparation of (A-1) Component

[0202] Add 1785 g (14.88 moles) of vinyl norbornene (trade name: V0062, manufactured by Tokyo Chemical Industry Co., Ltd.; 5- Vinylbicyclo[2.2.1]hept-2-ene and 6-vinylbicyclo[2.2.1]hept-2-ene isomer mixture in approximately equimolar amounts) and 455 g of toluene, using an oil bath Heat to 85°C. 3.6 g of carbon powder carrying 5% by mass of platinum was added thereto, and 1,698 g (8.75 mol) of 1,4-bis(dimethylsilyl)benzene was added dropwise over 180 minutes while stirring. After completion|finish of dripping, it heated and stirred at 110 degreeC for 24 hours, and cooled to room temperature after that. Then, platinum-supported carbon was removed by filtration, and toluene and excess vinylnorbornene were distilled off under reduced pressure to obtain 3362 g of a colorless and transparent oily reaction product (viscosity at 25° C.: 12820 mPa·s).

[0203] The reaction product was analyzed by FT-IR, NMR, GPC, etc., a...

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Abstract

The present invention provides a curable silicone combination for a light-reflecting material that has high fluidity, generates heat resistance (thermal stability), is excellent in heat discoloration resistance, and can obtain a cured product with high light reflectance thing. The curable silicone composition for a light reflective material is characterized by containing: 30 to 70 parts by mass of (A-1): (a) one molecule represented by general formula (1) having two silicon atoms Addition reaction product of a compound having a bonded hydrogen atom and (b) a polycyclic hydrocarbon having 2 addition-reactive carbon-carbon double bonds in one molecule, which has at least 2 addition-reactive carbon-carbon double bonds in one molecule Carbon-carbon double bond; 30-70 parts by mass of (A-2): a compound represented by general formula (3); (B) an organosilicon compound having 3 or more hydrogen atoms bonded to silicon atoms in one molecule; (C) hydrosilylation reaction catalyst; (D) titanium oxide powder; and (E) fumed silica powder.

Description

technical field [0001] The present invention relates to a curable silicone composition for a light reflection material (white thermosetting silicone composition) for producing a cured silicone resin useful as a light reflection material, particularly as a reflector material for a white LED (light emitting diode), A cured product of the composition, and a reflector and LED device using the cured product. Background technique [0002] In recent years, since optical semiconductor elements such as LEDs emit light with high efficiency and are excellent in drive characteristics and lighting repetition characteristics, they have been widely used as indicators and light sources. In particular, white LEDs are widely used as backlights for display devices and flashes for cameras, and are also expected as next-generation lighting devices. In order to improve the light extraction efficiency in the irradiation direction, such a light-emitting device is equipped with a member that reflec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/04C08K3/22C08K3/36
CPCC08L83/04C08L2205/025C08K2003/2241C08K3/22C08K3/36C08G77/20C08G77/12C08G77/50H01L33/56H01L33/58
Inventor 木村真司原田良文
Owner SHIN ETSU CHEM CO LTD
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