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A kind of tackifier of high refractive index LED encapsulation glue, its preparation method and its application

A technology of LED packaging and high refractive index, applied in the direction of adhesives, polymer adhesive additives, adhesive additives, etc., can solve the problems of operating environment pollution, product muddy, poor adhesion, etc., and achieve good mutual solubility Effect

Active Publication Date: 2017-02-22
兆舜科技(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are mainly two types of conventional tackifiers: one is a single body: KH560, KH570, etc. are used alone. These tackifiers have certain adhesion to the substrate, but have certain limitations, such as: for metal and Polycarbonate (PC) has poor adhesion; due to the presence of alkoxy groups, it will absorb moisture for a period of time and cause the product to become cloudy; these monomers have a certain unpleasant smell and pollute the operating environment; when added to the product It is easy to become cloudy or milky white, which affects the appearance of the product and the light transmittance of the final product; the second is the traditional synthetic tackifier: the introduction of vinyl or hydrogen groups, and the introduction of epoxy groups at the same time, so that the tackifier participates in the addition reaction At the same time, the epoxy group and the base material play a bonding role, which solves the phenomenon of moisture absorption, but some of them still have unpleasant odors and cause the product to become muddy or milky white, and the adhesion performance is also average

Method used

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  • A kind of tackifier of high refractive index LED encapsulation glue, its preparation method and its application
  • A kind of tackifier of high refractive index LED encapsulation glue, its preparation method and its application
  • A kind of tackifier of high refractive index LED encapsulation glue, its preparation method and its application

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Embodiment 1

[0035] The raw materials used in this embodiment and the ratio of raw materials are as shown in Table 1:

[0036] Table 1 raw materials and ratio

[0037] raw material name Specification Formula (g) 1. Hydrogen-containing double head ≥98％ 450 2. KH560 ≥98％ 1000 3. Allyl glycidyl ether ≥98％ 340 4. Hydrochloric acid ≥33％ 50 5. Water - 500 6. Platinum catalyst 3000ppm 0.13

[0038] Using the ratio of raw materials in Table 1, the high refractive index LED packaging adhesive tackifier of the present invention is prepared through the following steps:

[0039] (1) Add raw materials 4 and 5 into a 5-liter four-necked glass reaction bottle with speed-adjustable stirring, a thermometer and a reflux condenser, start stirring at a speed of 250 rpm, turn on the cooling water of the condenser, heat up, and serve as material When the temperature reaches 35±2°C; add the mixture of materials 1 and 2, and set the material temperature...

Embodiment 2

[0045] The raw materials used in this embodiment and the ratio of raw materials are as shown in Table 2:

[0046] Table 2 raw materials and ratio

[0047] raw material name Specification Formula (g) 1. Hydrogen-containing double head ≥98％ 435 2. KH560 ≥98％ 1050 3. Allyl glycidyl ether ≥98％ 350 4. Acetic acid ≥36％ 50 5. Water - 520 6. Platinum catalyst 3000ppm 0.15

[0048] Using the ratio of raw materials in Table 2, the high refractive index LED packaging adhesive tackifier of the present invention is prepared through the following steps:

[0049] (1) Add raw materials 4 and 5 into a 5-liter four-necked glass reaction bottle with speed-adjustable stirring, a thermometer and a reflux condenser, start stirring at a speed of 300 rpm, turn on the cooling water of the condenser, heat up, and serve as material When the temperature reaches 35±2°C; add the mixture of materials 1 and 2, and set the material temperature to 50...

Embodiment 4

[0055] The raw materials used in this embodiment and the ratio of raw materials are shown in Table 3:

[0056] Table 3 raw materials and ratio

[0057] raw material name Specification Formula (g) 1. Hydrogen-containing double head ≥98％ 443

[0058] 2. KH560 ≥98％ 1.30 3. Allyl glycidyl ether ≥98％ 360 4. Concentrated sulfuric acid ≥98％ 48 5. Water - 480 6. Platinum catalyst 3000ppm 0.14

[0059] Using the ratio of raw materials in Table 3, the high refractive index LED packaging adhesive tackifier of the present invention is prepared through the following steps:

[0060] (1) Add raw materials 4 and 5 into a 5-liter four-necked glass reaction bottle with speed-adjustable stirring, a thermometer and a reflux condenser, start stirring at a speed of 280 rpm, turn on the cooling water of the condenser, heat up, and serve as material When the temperature reaches 35±2°C; add the mixture of materials 1 and 2, and set...

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Abstract

The invention provides a high-refractivity LED (light-emitting diode) packaging adhesive tackifier which is prepared by the following steps: adding 48-52 parts by weight of acidic catalyst and 480-520 parts by weight of water into a reactor, and adding 435-450 parts by weight of hydrogen-containing double-end socket and 1000-1050 parts by weight of KH560 at 35+ / -2 DEG C; heating to 50+ / -2 DEG C, and keeping the temperature to react for 1.5-1.8 hours; washing with water, filtering, heating the filtrate to 100 DEG C, and vacuumizing to remove low-molecular substances; stopping vacuumizing, cooling to 40 DEG C below, adding 340-360 parts by weight of allyl glycidyl ether and 0.13-0.15 part by weight of platinum gold catalyst; and reacting at 60+ / -2 DEG C for 3-3.5 hours, cooling and discharging. The tackifier can be added into the high-refractivity LED packaging adhesive, has excellent mutual solubility, and does not have the phenomenon of discoloration. The tackifier has higher bonding force for PPA (phenylpropanolamine), PC (polycarbonate) and metal silver, and has favorable vulcanization resistance.

Description

technical field [0001] The invention belongs to the technical field of tackifiers, and relates to a tackifier for LED packaging adhesives, a preparation method and application thereof, in particular to a tackifier for high refractive index LED packaging adhesives, a preparation method and applications thereof. Background technique [0002] As LEDs become more and more widely used, the requirements for LED packaging materials are also getting higher and higher. Among them, packaging materials with high refractive index can improve light extraction efficiency by reducing the occurrence of total reflection. However, at present, LED packaging materials with high refractive index in China Although the refractive index of silica gel can reach between 1.50 and 1.55, because the formula design generally does not contain adhesives, it has the characteristics of low strength and poor adhesion to the substrate. In order to overcome this shortcoming, it is desired to improve the adhesio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/38C08G77/16C08G77/08C09J11/08C09J183/04
Inventor 陈正旺黄永军黎忠林
Owner 兆舜科技(广东)有限公司