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Addition-curable silicone composition and optical device

一种硅酮组合物、加成固化型的技术，应用在光学元件、光学、电气元件等方向，能够解决透明性、折射率、弹性无法充分让人满意、光学元件性能无法充分让人满意、不具有弹性等问题，达到光提取效率优异、强度特性良好、亮度提高的效果

Active Publication Date: 2015-09-09
SHIN ETSU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, although the cured product of branched organopolysiloxane introduced with phenyl groups can be made to have a refractive index of about 1.53 to 1.54, the obtained cured product is relatively hard resinous and does not have elasticity.
Furthermore, a composition comprising a combination of a branched organopolysiloxane and a linear organopolysiloxane has been proposed, but the transparency, refractive index, elasticity, etc. are not sufficiently satisfactory ( Patent Documents 1 to 7)
[0005] Therefore, in Patent Document 8, an addition-curable silicone composition that provides a cured product, and a sealing material for an optical element containing the composition, are proposed. It has high transparency and high refractive index and good strength characteristics, but the performance of the optical element provided by the composition is not satisfactory, especially the light transmittance at a wavelength of 400nm at 25°C is poor

Method used

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  • Addition-curable silicone composition and optical device
  • Addition-curable silicone composition and optical device
  • Addition-curable silicone composition and optical device

Examples

Experimental program
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Embodiment

[0114] Hereinafter, although an Example and a comparative example are used and this invention is demonstrated concretely, this invention is not limited to these examples.

[0115] In addition, in the following examples, the viscosity is the value measured at 23 degreeC using the rotational viscometer.

[0116] The refractive index is the refractive index of visible light with a wavelength of 589nm measured at 25°C using a digital refractometer RX-5000 manufactured by ATAGO Corporation, and the hardness, elongation at cutting, and tensile strength are based on JIS-K6249. Dumbbells are measured.

[0117] The light transmittance was obtained by molding the composition into a sheet with a thickness of 2 mm and curing it, and measured the transmittance with respect to light having a wavelength of 400 nm at 25° C. using a spectrophotometer.

[0118] In addition, in the following examples, the symbols in the average composition formula represent the following units, respectively.

...

Synthetic example 1

[0133] In a 500ml four-necked flask equipped with a stirring device, a condenser, a dropping funnel, and a thermometer, 71.9g (0.33mol) of 3,3,3-trifluoropropyl-trimethoxysilane, 1,3,5 -Three [(3,3,3-trifluoropropyl) methyl] cyclotrisiloxane 25.5g (0.05mol), and tetramethyldihydrodisiloxane 67.0g (0.5mol), cooled to 5 ~15°C.

[0134] After adding 8.2 g (0.08 mol) of sulfuric acid to this and mixing well, 18.7 g (1.05 mol) of ion-exchanged water was added dropwise. After completion of the dropwise addition, stirring was performed at room temperature for 8 hours. After the stirring was completed, the solution was allowed to stand for 15 minutes, and then the supernatant was removed. The acid remaining in the product was removed by repeating three times the operation of adding 300 ml of water, stirring for 15 minutes, and then standing still for 15 minutes to remove the supernatant. 3 g (0.02 mol) of Glauber's salt was added to this solution, and it filtered and the mixed wate...

Synthetic example 2

[0139] In a 500ml four-necked flask equipped with a stirring device, a condenser, a dropping funnel, and a thermometer, add (3,3,4,4,5,5,6,6,7,7,8,8,8- Tridecafluorooctyl)trichlorosilane 240.8g (0.5mol), 1,3,5-tris[(3,3,3-trifluoropropyl)methyl]cyclotrisiloxane 33.8g (0.08mol) , and 110.6 g (0.825 mol) of tetramethyldihydrodisiloxane, cooled to 5-15°C.

[0140] 18.9 g (0.19 mol) of sulfuric acid was added thereto and mixed well, and then 29.7 g (1.65 mol) of ion-exchanged water was added dropwise. After completion of the dropwise addition, stirring was performed at room temperature for 8 hours. After the stirring was completed, the solution was allowed to stand for 15 minutes, and then the supernatant was removed. The acid remaining in the product was removed by repeating three times the operation of adding 300 ml of water, stirring for 15 minutes, and then standing still for 15 minutes to remove the supernatant. 3 g (0.02 mol) of Glauber's salt was added to this solution, ...

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Abstract

The present invention provides an addition-curable silicone composition comprising: (A) a linear organopolysiloxane having silicon atom-bonded aliphatic unsaturated groups and CF3—(CF2)y—(CH2)z— groups; (B) an organopolysiloxane having silicon atom-bonded aliphatic unsaturated groups and CF3—(CF2)y—(CH2)z— groups, and having a branched structure represented by SiO4 / 2 and RSiO3 / 2; (C) an organosilicon compound having silicon atom-bonded hydrogen atoms and represented by the following general formula (1); and (D) a platinum group metal-based catalyst. There can be provided an addition-curable silicone composition that provides a cured product having low refractive index, high transparency, excellent light extraction efficiency, good rubber properties and strength properties, and no tack after curing, and in particular, has good transmittance of light with a wavelength of 400 nm at 25° C.

Description

technical field [0001] The invention relates to an addition curing silicone composition and an optical element, in particular to an addition curing silicone composition and an optical element sealed with the cured product of the composition. The type silicone composition can provide a cured product having good gum properties and strength properties, a low refractive index, and excellent product reliability without adhesiveness after curing. Background technique [0002] Addition-curable silicone composition, comprising organopolysiloxane containing aliphatic unsaturated groups such as alkenyl groups and organopolysiloxanes containing hydrogen atoms bonded to silicon atoms (that is, SiH groups) (organohydrogen Polysiloxane) can be cured by a hydrosilylation reaction to provide a cured product. The cured product obtained in this way is excellent in heat resistance, cold resistance, and electrical insulation, and is transparent, so it is used as a sealing material for various ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05G02B1/04
CPCC08L83/06C08L2201/10C08L2203/206H01L33/56C08L2205/025C08G77/12C08G77/20C08G77/24H01L2924/0002C08K5/5419C08K5/56C08L83/00Y10T428/31663C08L83/08H01L2924/00C08G77/04C08L83/04G02B1/04C08L2203/162H01L23/296
Inventor 小林之人小材利之岩田充弘
Owner SHIN ETSU CHEM CO LTD
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