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High-refractive-index yellowing-resistant LED packaging silica gel

A technology of LED packaging and high refractive index, applied in the field of high refractive index LED packaging silica gel and high refractive index yellowing resistant LED packaging silica gel, can solve the problems of UV aging yellowing and other problems, achieve low temperature and UV yellowing performance, Excellent optical structure, high refractive index effect

Inactive Publication Date: 2016-10-26
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The higher phenyl content makes the high-refractive index LED packaging material dense in structure, strong in rigidity, strong in polarity, and excellent in adhesiveness. And UV aging yellowing is serious, resulting in serious light decay of lamp beads in the presence of light and heat

Method used

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  • High-refractive-index yellowing-resistant LED packaging silica gel
  • High-refractive-index yellowing-resistant LED packaging silica gel
  • High-refractive-index yellowing-resistant LED packaging silica gel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Component A includes the following raw materials in parts by weight: 80 parts of methylcyclohexylvinyl silicone resin, 18 parts of modified organosilicon (structural formula 1) containing cyclohexyl and cyclohydrocarbyl structures in the main chain terminated by cycloalkene group, platinum catalyst 0.1 part, 1.9 parts of adhesive (structural formula 2), stirred at room temperature for 2 hours, and mixed evenly;

[0026] The component B includes the following raw materials in parts by weight: 50 parts of modified organosilicon (structural formula 1) whose main chain terminated by cycloalkene group contains cyclohexyl and cyclohydrocarbyl structure, and the main chain terminated by silicon hydrogen of chain extender contains cyclohydrocarbyl group. Structure modified silicone (structural formula 3) 50 parts, inhibitor (structural formula 4) 0.3 parts, stirred at room temperature for 2 hours, and mixed evenly.

Embodiment 2

[0028] Component A includes the following raw materials in parts by weight: 90 parts of methylcyclohexylvinyl silicone resin, 8 parts of modified organosilicon (structural formula 1) containing cyclohexyl and cyclohydrocarbyl structures in the main chain terminated by cycloalkenyl group, platinum catalyst 0.3 parts, 1.7 parts of adhesive (structural formula 2), stirred at room temperature for 2 hours, and mixed evenly;

[0029] The component B includes the following raw materials in parts by weight: 30 parts of modified organosilicon (structural formula 1) whose main chain terminated by a cycloalkene group contains cyclohexyl and cyclohydrocarbyl structures, and the main chain terminated by a chain extender containing a hydrosilyl group contains a cyclohydrocarbyl group. Structure modified silicone (structural formula 3) 70 parts, inhibitor (structural formula 4) 0.1 part, stir at room temperature for 2 hours, and mix well.

Embodiment 3

[0031] Component A includes the following raw materials in parts by weight: 85 parts of methylcyclohexylvinyl silicone resin, 13 parts of modified organosilicon (structural formula 1) containing cyclohexyl and cyclohydrocarbyl structures in the main chain terminated by cycloalkenyl group, platinum catalyst 0.2 parts, 1.8 parts of adhesive (structural formula 2), stirred at room temperature for 2 hours, and mixed evenly;

[0032] The component B includes the following raw materials in parts by weight: 40 parts of modified silicone (structural formula 1) whose main chain terminated by a cycloalkene group contains cyclohexyl and cyclohydrocarbyl structures, and the main chain terminated by a chain extender containing a hydrosilyl group contains a cyclohydrocarbyl group. 60 parts of modified organosilicon (structural formula 3), 0.2 part of inhibitor (structural formula 4), stirred at room temperature for 2 hours, and mixed uniformly.

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Abstract

High-refractive-index yellowing-resistant LED packaging silica gel comprises a component A and a component B according to a weight ratio of 4:1. The component A comprises, by weight, 80-90 parts of methyl cyclohexyl vinyl silicon resin, 8-18 parts of modified organosilicon terminated with cycloalkenyl and with a main chain containing cyclohexyl and cycloalkyl structure, 0.1-0.3 part of platinum catalyst and 1-5 parts of adhesive; the component B comprises, by weight, 30-50 parts of modified organosilicon terminated with cycloalkenyl and with a main chain containing cyclohexyl and cycloalkyl structure, 50-70 parts of modified organosilicon terminated with chain extender silicon-hydrogen and with a main chain containing cycloalkyl structure and 0.1-0.3 part of inhibitor. The high-refractive-index yellowing-resistant LED packaging silica gel has the advantages that in molecular structural design of a formula, a benzene ring is not contained while a molecular structure with cyclohexyl contained in a main chain and cyclohexyl contained in resin is introduced, so that the high-refractive-index yellowing-resistant LED packaging silica gel has excellent optical structure, high refractive index and extremely-low high-temperature and UV yellowing performance.

Description

technical field [0001] The invention relates to high-refractive-index LED packaging silica gel, in particular high-refractive-index LED packaging silica gel that is resistant to yellowing, and belongs to the technical field of adhesives. Background technique [0002] LEDs are known as fourth-generation lighting sources or green light sources. It has the characteristics of energy saving, environmental protection, long life, small size, etc., and can be widely used in lighting (including general lighting and landscape decoration lighting), backlight, indicator display and other fields. The rise of the LED industry has brought new hope to energy conservation, emission reduction, and energy environmental protection, showing an extremely broad application prospect. With the rapid development of the LED industry, especially the lighting industry, LED is gradually developing towards high power, so more and more comprehensive requirements are put forward for packaging materials. H...

Claims

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Application Information

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IPC IPC(8): C09J183/10C09J11/06C08G77/442C08G77/08H01L33/56
CPCC09J183/10C08G77/08C08G77/442C08K5/5435C09J11/06H01L33/56
Inventor 庄恒冬陈维
Owner YANTAI DARBOND TECH
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