Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Silicon oil for packaging LED (light-emitting diode) and preparation method thereof

A technology of LED encapsulation and silicone oil, which is applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problems of low refractive index and light transmittance of basic polymer silicone oil, large difference in physical and chemical properties, and difficulty of transparent polymers. , to achieve the effect of balancing the ring-opening polymerization reaction, improving the catalytic efficiency, increasing the refractive index and light transmittance

Inactive Publication Date: 2013-06-12
ZHUZHOU TIMES NEW MATERIALS TECH
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the diphenyl cyclic body is solid at room temperature, and the methyl cyclic body is liquid. Due to the large difference in physical and chemical properties between the biphenyl cyclic body and the methyl cyclic body, it is difficult to prepare transparent polymers by ring-opening polymerization of the biphenyl cyclic body. Larger, therefore, if the polymerization conditions of methylcyclosiloxane and phenylcyclosiloxane are slightly improperly controlled, the polymer will be turbid, resulting in a decrease in the refractive index and light transmittance of the base polymer silicone oil

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Silicon oil for packaging LED (light-emitting diode) and preparation method thereof
  • Silicon oil for packaging LED (light-emitting diode) and preparation method thereof
  • Silicon oil for packaging LED (light-emitting diode) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The invention provides a kind of its preparation method of silicone oil for LED encapsulation, comprises the following steps:

[0025] Mix methylcyclosiloxane, phenylcyclosiloxane, catalyst, end-capping agent and accelerator to obtain a mixed solution, carry out ring-opening polymerization and purification, and obtain silicone oil for LED packaging; the accelerator is two One or more of methyl sulfoxide, N,N-dimethylformamide, hexamethylphosphoric triamide, acetonitrile, nitrobenzene and butanone.

[0026] In the present invention, firstly, the methyl cyclosiloxane, the phenyl cyclosiloxane, the catalyst, the capping agent and the accelerator are mixed to obtain a mixed liquid, and the ring-opening polymerization reaction is carried out to obtain the mixed liquid containing the silicone oil for LED encapsulation.

[0027] In the present invention, the methylcyclosiloxane is preferably a mixture of decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, hexamethylcyc...

Embodiment 1

[0048] Add 50g octamethylcyclotetrasiloxane, 50g octaphenylcyclotetrasiloxane, 5g tetramethylammonium hydroxide and 10ml Dimethyl sulfoxide, after reacting at 100°C for 5h, then add 1.5g of 1,4-divinyltetramethyldisiloxane into the four-necked flask, and continue to react at 100°C for 2h to obtain Mixed liquid of silicone oil;

[0049] heating the mixed liquid containing silicone oil for LED packaging to 160°C, keeping it for 1 hour, decomposing the tetramethylammonium hydroxide, and obtaining a mixed liquid of silicone oil for LED packaging that does not contain a catalyst;

[0050] The mixed solution formed by 50mL of toluene and 100mL of methanol is used as the washing liquid, mixed with the mixed liquid of the silicone oil for LED packaging that does not contain the catalyst, placed in a separatory funnel, left to stand, and the lower layer of liquid is taken, and the lower layer of liquid is filtered , heated to remove a small amount of detergent in the lower liquid, and...

Embodiment 2

[0056] Add 50g octamethylcyclotetrasiloxane, 90g octaphenylcyclotetrasiloxane, 5g tetramethylammonium hydroxide and 15ml Dimethyl sulfoxide, after reacting at 100°C for 6h, then add 1.5g of 1,4-divinyltetramethyldisiloxane into the four-necked flask, and continue to react at 100°C for 2h to obtain Mixed liquid of silicone oil;

[0057] heating the mixed liquid containing silicone oil for LED packaging to 160°C, keeping it for 1 hour, decomposing the tetramethylammonium hydroxide, and obtaining a mixed liquid of silicone oil for LED packaging that does not contain a catalyst;

[0058] The mixed solution formed by 50mL of toluene and 100mL of methanol is used as the washing liquid, mixed with the mixed liquid of the silicone oil for LED packaging that does not contain the catalyst, placed in a separatory funnel, left to stand, and the lower layer of liquid is taken, and the lower layer of liquid is filtered , heated to remove a small amount of detergent in the lower liquid, and...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides silicon oil for packaging an LED (light-emitting diode) and a preparation method of the silicon oil. The preparation method comprises the following steps of: mixing methyl cyclosiloxane, phenyl cyclosiloxane, a catalyst, a blocking agent and a promoter to obtain a mixed solution, and performing ring-opening polymerization reaction and purification to obtain the silicon oil for packaging the LED, wherein the promoter is one or more of dimethyl sulfoxide, N,N-dimethylfomamide, hexamethylphosphoric triamide, acetonitrile, nitrobenzene and butanone. According to the preparation method, when the promoter reacts with the raw materials, the promoter can be subjected to solvation with the catalyst to ensure that the aggregation of the catalyst is reduced, the catalytic efficiency is improved, the uniform rearrangement of polymers is favored, and a ring-opening polymerization is balanced, so that the product has uniform composition, and the refractivity and light transmittance of the silicon oil for packaging the LED are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a silicone oil for LED packaging and a preparation method thereof. Background technique [0002] Semiconductor lighting technology is one of the most potential high-tech fields in the 21st century, and its core technology is light-emitting diode (LED). At present, with the continuous improvement of LED technology, ultra-high-brightness LEDs have been gradually industrialized, and they are expected to replace incandescent lamps as the fourth-generation light source. [0003] The LED packaging materials on the market are mainly epoxy resins, but epoxy resins have a low refractive index, poor heat resistance, and high thermal resistance, and are prone to yellowing after long-term use. Therefore, more and more manufacturers use silicone materials to package LEDs. Silicone material is used as the packaging material for LEDs ranging from green light to near-ultr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08G77/20C08G77/10H01L33/56
Inventor 姜其斌高健赵慧宇曾智毕俊宋志成
Owner ZHUZHOU TIMES NEW MATERIALS TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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