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Addition-curable silicone composition, cured product, optical element

An addition curing type, silicone technology, applied in the direction of optical components, optics, instruments, etc., can solve the problems of insufficient heat discoloration resistance and large discoloration, and achieve excellent heat discoloration resistance, high refractive index, and high resistance to discoloration. The effect of vulcanization

Active Publication Date: 2021-08-27
SHIN ETSU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a composition is superior in sulfuration resistance to sealing materials using phenyl-based silicones and can suppress corrosion of silver substrates, but discoloration is large when exposed to high temperatures, and heat discoloration resistance is insufficient.

Method used

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  • Addition-curable silicone composition, cured product, optical element
  • Addition-curable silicone composition, cured product, optical element
  • Addition-curable silicone composition, cured product, optical element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3、 comparative example 1～3

[0133] The following components were mixed at the blending ratio shown in Table 1 to prepare an addition-curable silicone composition. In addition, in Table 1, a part shows a mass part.

[0134] (A-1) Ingredients:

[0135] (CH 2 =CH(CH 3 )(C 6 h 5 ) SiO 1 / 2 ) 2 ((C 6 h 5 ) 2 SiO) 3.8 (SiO 2 ) 4.3 branched chain silicone resin

[0136] (A-2) Ingredients:

[0137] (A-2-a)(CH 2 =CH(CH 3 )(C 6 h 5 ) SiO 1 / 2 ) 2 ((C 6 h 5 ) 2 SiO) 3 Expressed linear silicone oil with a viscosity of 2,000mPa·s

[0138] (A-2-b)(CH 2 =CH(CH 3 )(C 6 h 5 ) SiO 1 / 2 ) 2 ((C 6 h 5 ) 2 Linear silicone oil represented by SiO) with a viscosity of 240mPa·s

[0139] (A-2-c)(CH 2 =CH(CH 3 ) 2 SiO 1 / 2 ) 2 ((C 6 h 5 ) 2 SiO) 3 Expressed linear silicone oil with a viscosity of 700mPa·s

[0140] (B) Ingredients:

[0141] (B-a) organohydrogenpolysiloxane represented by the following formula (8)

[0142] [chemical formula 14]

[0143]

[0144] In the formula, the arrange...

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Abstract

The present invention provides an addition-curable silicone composition providing a cured product having high heat discoloration resistance and high sulfuration resistance, and a highly reliable optical element sealed by the cured product. The addition-curable silicone composition includes: (A-1) a branched chain organopolysiloxane represented by the following average composition formula (1), (R 1 3 SiO 1 / 2 ) a (R 2 R 1 2 SiO 1 / 2 ) b (R 2 R 1 SiO) c (R 1 2 SiO) d (R 2 SiO 3 / 2 ) e (R 1 SiO 3 / 2 ) f (SiO 4 / 2 ) g ···(1) The branched organopolysiloxane has at least two siloxane units represented by the following formula (2) in one molecule as (R in the average composition formula (1) 2 R 1 2 SiO 1 / 2 ) unit, [Chemical Formula 1] (A-2) a linear organopolysiloxane represented by the following formula (3): the mass ratio (A-1):(A-2) is 100:0 to 50:50 [Chemical formula 2] (B) an organohydrogenpolysiloxane having at least two siloxane units represented by the following formula (4) in one molecule, [Chemical formula 3] (C) an organohydrogenpolysiloxane containing a platinum group metal Hydrosilylation catalyst.

Description

technical field [0001] The present invention relates to an addition-curable silicone composition, its cured product, and an optical element sealed by the cured product. Background technique [0002] A device having a light emitting diode (LED) as an optical semiconductor element generally has a configuration in which the LED mounted on the substrate is sealed with a sealing material made of a transparent resin. Epoxy resins have been used as this encapsulant, but due to the increase in heat generation and the shortening of the wavelength of light due to the recent miniaturization of semiconductor packages and higher brightness of LEDs, cracks and yellowing have occurred in the resin. , leading to a decrease in reliability. [0003] Therefore, from the viewpoint of heat resistance and heat discoloration resistance, silicone resin compositions are attracting attention as sealing materials, and addition reaction-curable silicone resin compositions can be cured in a short time ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/05
CPCC08G77/20C08G77/08C08G77/12C08L83/04C08L83/10G02B1/04
Inventor 小林之人小材利之
Owner SHIN ETSU CHEM CO LTD
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