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Addition-curable silicone composition, method for producing same, cured silicone product, and optical element

A silicone composition, addition-curing technology, applied in electrical components, semiconductor/solid-state device parts, semiconductor devices, etc., can solve the problem of insufficient heat discoloration resistance of phenyl silicone, temperature rise of sealing materials, LED Brightness reduction and other problems, to achieve the effect of less weight change, excellent heat resistance, and less discoloration

Active Publication Date: 2021-03-09
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, such a phenyl group-containing composition becomes yellow at high temperature and the light transmittance decreases, so that the reduction of LED brightness becomes a problem
In recent years, with the high output of LED, the temperature of the sealing material has risen, so the thermal discoloration resistance of phenyl silicone is not enough for this problem.

Method used

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  • Addition-curable silicone composition, method for producing same, cured silicone product, and optical element
  • Addition-curable silicone composition, method for producing same, cured silicone product, and optical element
  • Addition-curable silicone composition, method for producing same, cured silicone product, and optical element

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Embodiment

[0150] Hereinafter, the present invention will be specifically described using synthesis examples, examples, and comparative examples, but the present invention is not limited to these examples. In addition, in the following examples, the viscosity is the value at 25 degreeC measured using the rotational viscometer.

Synthetic example 1

[0152] 13 parts by mass (0.55 parts in terms of cerium) in turpentine (turpentine) solution of 2-ethylhexanoate containing cerium as the main component (rare earth element content is 6 mass %) and 2.7 parts by mass of titanium Tetra-n-butyl acid (titanium mass is 0.3 times the mass of cerium in the above-mentioned 2-ethylhexanoate) is fully mixed, and added to 130 parts by mass of ((CH 3 ) 3 SiO 1 / 2 ) 2 ((C 6 h 5 ) 2 SiO) 3.9 ((CH 3 ) 2 SiO) 8.6 In methylphenyl organopolysiloxane with a viscosity of 400 mPa·s, a yellow-white dispersion was obtained. While flowing a small amount of nitrogen gas into the dispersion liquid, heat it to let the turpentine flow out, and then heat it at 300°C for 1 hour. As a result, a uniform combination of dark brown and transparent polyorganometallic siloxane (C-1) was obtained. things. Analysis of the obtained polyorganometallic siloxane by ICP-OES (inductively coupled plasma optical emission spectrometry) revealed that the Ce content ...

Synthetic example 2

[0154] While stirring, 13 parts by mass (0.55 parts in terms of cerium) were added to 130 parts by mass of ((CH 3 ) 3 SiO 1 / 2 ) 2 ((C 6 h 5 ) 2 SiO) 3.9 ((CH 3 ) 2 SiO) 8.6 In methylphenyl organopolysiloxane with a viscosity of 400 mPa·s, a yellow-white dispersion was obtained. While flowing a small amount of nitrogen gas into the dispersion liquid, heat it to let the turpentine flow out, and then heat it at 300°C for 1 hour. As a result, a uniform combination of deep yellowish brown and transparent polyorganometallic siloxane (C-2) was obtained. thing. As a result of analyzing the obtained polyorganometallic siloxane by ICP-OES (inductively coupled plasma optical emission spectrometry), the Ce content was 3300 ppm. In addition, the viscosity of the polyorganometallic siloxane (C-2) was 220 mPa·s.

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Abstract

An addition-curable silicone composition comprising a phenyl group and capable of obtaining a cured product excellent in heat resistance, with little weight change and little discoloration at high temperatures. The addition-curable silicone composition of the present invention comprises the following components: (A-1) branched organopolysiloxane represented by formula (1); (A-2) linear organopolysiloxane represented by formula (2) Organopolysiloxanes, (B) organohydrogenpolysiloxanes, which have at least 2 or more hydrogen atoms bonded to silicon atoms in one molecule; (C) polyorganometallic siloxanes, containing Si‑O -Ce bond and Si-O-Ti bond, the Ce content is 50-5000ppm, the Ti content is 50-5000ppm, the viscosity at 25°C is 10-10000mPa·s, relative to the total number of organic groups contained in one molecule, having at least 10 mole percent aryl groups; and (D) a hydrosilylation catalyst comprising a platinum group metal.

Description

technical field [0001] The present invention relates to an addition-curable silicone composition, a method for producing the composition, a silicone cured product, and an optical element sealed with the cured product. Background technique [0002] An LED lamp has a light emitting diode (LED) as an optical semiconductor element and is known as an optical semiconductor device. The LED lamp has a configuration in which the LED mounted on a substrate is sealed with a sealing material made of a transparent resin. Conventionally, epoxy resin-based compositions have been widely used as sealing materials for sealing such LEDs. [0003] However, in epoxy resin-based sealing materials, the increase in calorific value and the shortening of the wavelength of light due to the miniaturization of semiconductor packages and the increase in brightness of LEDs in recent years have caused cracks and yellowing, resulting in a decrease in reliability. [0004] Therefore, from the viewpoint of h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/05C08L83/14C08K5/549C08K5/05
CPCC08L83/04C08K2201/014C08L2205/025C08L2205/03C08L2201/08C08L2201/10C08L83/14C08K5/549C08K5/05C08G77/398C08G77/04C08G77/52C08G77/20C08G77/12C08G77/14C08G77/08H01L23/296H01L33/56
Inventor 小林之人小材利之
Owner SHIN ETSU CHEM IND CO LTD
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