Novel modified nanometer titanium dioxide doping alicyclic epoxy resin LED (light emitting diode) encapsulation glue

Abstract

The invention relates to novel modified nanometer titanium dioxide doping alicyclic epoxy resin LED (light emitting diode) encapsulation glue, which is characterized in that the encapsulation glue consists of ingredients A and ingredients B, and the ingredients A and the ingredients B are used for construction after being mixed according to a proportion being 1:(0.9-1.0), wherein the ingredients A consist of alicyclic epoxy resin, reactive diluents, transparent blue purple dye color paste, defoaming agents and softness increase agents, and the ingredients B consist of curing agents, accelerants, silane coupling agent modified nanometer ultraviolet absorption agents, polyalcohol and antioxidants. The nanometer titanium dioxide doping alicyclic epoxy resin LED glue with good ultraviolet ageing resistance performance, high bonding force, fast curing and low viscosity and moisture absorption is provided, the adoption of high-cost organic silicon is avoided, meanwhile, the defects of high moisture absorption, poor ultraviolet resistance, low shortwave transmittance and the like of the existing bisphenol A type epoxy resin are overcome, and the LED encapsulation glue is more suitable for being used as high-grade LED encapsulation glue, high-power LED encapsulation glue or LED encapsulation glue based on white light and blue light of ultraviolet light.

Description

technical field

[0001] The invention relates to an LED encapsulation adhesive, in particular to a nano-titanium dioxide-doped alicyclic epoxy resin LED encapsulation adhesive modified by a silane coupling agent with good ultraviolet aging resistance and strong adhesion. Background technique

[0002] Light-emitting diodes (LEDs), as the third-generation semiconductor lighting source, are widely used in lighting, radiation sources, and displays because they have advantages in all aspects compared with incandescent lamps and fluorescent lamps. During the use of LEDs, the photons generated by radiative recombination will be lost when they are emitted outwards, and a lot of light cannot be emitted from the chip to the outside. By coating the surface of the chip with a transparent adhesive layer with a relatively high refractive index, that is, encapsulation adhesive, since the adhesive layer is between the chip and the air, the loss of photons at the interface can be effectively...

Examples

Embodiment 1

[0020] (1) Preparation of Component A: 96.6% 4-vinyl epoxycyclohexane, 2.6% propylene oxide butyl ether, 0.6% softener, 0.14% defoamer and 0.06% transparent blue-violet dye The color paste is weighed according to the proportion, and stirred at 70-90°C for 3-4h until the mixture is uniform;

[0021] (2) Preparation of modified nanoparticles: adjust the pH value of 15% silane coupling agent aqueous solution to 3-4, pour it into a constant pressure dropping funnel, and then slowly add it dropwise to 85% nano-titanium dioxide dispersion at 75°C, Drop it within 30 minutes and keep it warm for 3 hours;

[0022] (3) Preparation of component B: the mixture of 98.4% by mass percentage of methylhexahydrophthalic anhydride and polyazelaic anhydride, 0.97% of tetramethylammonium bromide, 0.5% of glycerin, and 0.05% of silane coupling agent were modified Titanium dioxide nanometer and 0.08% tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester are weighed in pro...

Embodiment 2

[0025] (1) Preparation of component A: 96.8% 3-oxiranyl-7-oxabicyclo[4,1,0]heptane, 2.5% propylene oxide phenyl ether, 0.5% softener , 0.14% defoamer and 0.06% transparent blue-violet dye paste are weighed in proportion, and stirred at 70-90°C for 3-4h until they are evenly mixed;

[0026] (2) Preparation of modified nanoparticles: adjust the pH value of 15% silane coupling agent aqueous solution to 3-4, pour it into a constant pressure dropping funnel, and then slowly add it dropwise to 85% nano-titanium dioxide dispersion at 75°C, Drop it within 30 minutes and keep it warm for 3 hours;

[0027] (3) Preparation of component B: the mixture of 98.4% by mass percentage of methylhexahydrophthalic anhydride and polyazelaic anhydride, 1% tetramethylammonium iodide, 0.5% glycerin, and 0.05% silane coupling agent were modified Proportionally weighed nano-sized titanium dioxide and 0.05% 2,6-di-tert-butyl-p-cresol, stirred at 70-90°C for 3-4h until uniformly mixed;

[0028] ⑷ A and ...

technical field

[0001] The invention relates to an LED encapsulation adhesive, in particular to a nano-titanium dioxide-doped alicyclic epoxy resin LED encapsulation adhesive modified by a silane coupling agent with good ultraviolet aging resistance and strong adhesion. Background technique

[0002] Light-emitting diodes (LEDs), as the third-generation semiconductor lighting source, are widely used in lighting, radiation sources, and displays because they have advantages in all aspects compared with incandescent lamps and fluorescent lamps. During the use of LEDs, the photons generated by radiative recombination will be lost when they are emitted outwards, and a lot of light cannot be emitted from the chip to the outside. By coating the surface of the chip with a transparent adhesive layer with a relatively high refractive index, that is, encapsulation adhesive, since the adhesive layer is between the chip and the air, the loss of photons at the interface can be effectively...

Examples

Embodiment 1

[0020] (1) Preparation of Component A: 96.6% 4-vinyl epoxycyclohexane, 2.6% propylene oxide butyl ether, 0.6% softener, 0.14% defoamer and 0.06% transparent blue-violet dye The color paste is weighed according to the proportion, and stirred at 70-90°C for 3-4h until the mixture is uniform;

[0021] (2) Preparation of modified nanoparticles: adjust the pH value of 15% silane coupling agent aqueous solution to 3-4, pour it into a constant pressure dropping funnel, and then slowly add it dropwise to 85% nano-titanium dioxide dispersion at 75°C, Drop it within 30 minutes and keep it warm for 3 hours;

[0022] (3) Preparation of component B: the mixture of 98.4% by mass percentage of methylhexahydrophthalic anhydride and polyazelaic anhydride, 0.97% of tetramethylammonium bromide, 0.5% of glycerin, and 0.05% of silane coupling agent were modified Titanium dioxide nanometer and 0.08% tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester are weighed in pro...

Embodiment 2

[0025] (1) Preparation of component A: 96.8% 3-oxiranyl-7-oxabicyclo[4,1,0]heptane, 2.5% propylene oxide phenyl ether, 0.5% softener , 0.14% defoamer and 0.06% transparent blue-violet dye paste are weighed in proportion, and stirred at 70-90°C for 3-4h until they are evenly mixed;

[0026] (2) Preparation of modified nanoparticles: adjust the pH value of 15% silane coupling agent aqueous solution to 3-4, pour it into a constant pressure dropping funnel, and then slowly add it dropwise to 85% nano-titanium dioxide dispersion at 75°C, Drop it within 30 minutes and keep it warm for 3 hours;

[0027] (3) Preparation of component B: the mixture of 98.4% by mass percentage of methylhexahydrophthalic anhydride and polyazelaic anhydride, 1% tetramethylammonium iodide, 0.5% glycerin, and 0.05% silane coupling agent were modified Proportionally weighed nano-sized titanium dioxide and 0.05% 2,6-di-tert-butyl-p-cresol, stirred at 70-90°C for 3-4h until uniformly mixed;

[0028] ⑷ A and ...