Preparation method for phenyl vinyl methyl MQ silicone resin which has high refractive index and is used for LED package
A kind of phenylvinylmethyl, LED encapsulation technology
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0018] Add 170 g of ethyl silicate, 111 g of hexamethyldisiloxane, 12 g of vinyl double caps, and 10 g of phenyl double caps in the three-necked flask, and mix well. At a reaction temperature of 10°C, 4 g of concentrated sulfuric acid and 30 g of water were slowly added dropwise. After 1 h of reaction, the temperature was raised to reflux for 4 h, and 40 wt % KOH solution was added dropwise to adjust the system to be neutral. Then distilled with toluene and filtered to obtain a clear and transparent silicone resin toluene solution. The toluene solvent was distilled off to obtain 270 g of a clear and transparent silicone resin with a phenyl vinyl network structure, with a yield of 89% and a vinyl content of 5%.
Embodiment 2
[0020] Add 170 g of ethyl silicate, 111 g of hexamethyldisiloxane, 15 g of vinyl double caps, and 10 g of phenyl double caps in the three-necked flask, and mix well. At a reaction temperature of 8° C., 4 g of concentrated sulfuric acid and 30 g of water were slowly added dropwise, and after 1 h of reaction, the temperature was raised to reflux for 5 h, and 50 wt % KOH solution was added dropwise to adjust the system to be neutral. Then distilled with toluene and filtered to obtain a clear and transparent silicone resin toluene solution. The toluene solvent was distilled off to obtain 280 g of a clear and transparent silicone resin with a phenyl vinyl network structure, with a yield of 91% and a vinyl content of 5.5%.
Embodiment 3
[0022] Add 170 g of ethyl silicate, 111 g of hexamethyldisiloxane, 10 g of vinyl double caps, and 10 g of phenyl double caps in the three-necked flask, and mix well. At a reaction temperature of 8°C, 4 g of concentrated sulfuric acid and 30 g of water were slowly added dropwise, and after 1 h of reaction, the temperature was raised to reflux for 6 h, and 60 wt % KOH solution was added dropwise to adjust the system to be neutral. Then distilled with toluene and filtered to obtain a clear and transparent silicone resin toluene solution. The toluene solvent was distilled off to obtain 265 g of a clear and transparent silicone resin with a phenyl vinyl network structure, with a yield of 88% and a vinyl content of 3%.
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com