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Preparation method of adhesion promoter for high refractive index addition type silicone encapsulation adhesive

A technology of adhesion promoter and high refractive index, used in adhesives, polymer adhesive additives, adhesive additives, etc., can solve the problem of poor compatibility between adhesion promoters and encapsulants, complex synthesis process, environmental hazards, etc. problem, to achieve the effect of significant viscosity increase, high refractive index and good compatibility

Active Publication Date: 2021-03-23
FOSHAN XINXIANGXING CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently reported adhesion promoters have disadvantages such as complex synthesis process, organic solvents are often used in the synthesis process, which is harmful to the environment, and the synthesized adhesion promoters have poor compatibility with encapsulants.

Method used

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  • Preparation method of adhesion promoter for high refractive index addition type silicone encapsulation adhesive
  • Preparation method of adhesion promoter for high refractive index addition type silicone encapsulation adhesive
  • Preparation method of adhesion promoter for high refractive index addition type silicone encapsulation adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In this example, the preparation method of the high refractive index adhesion promoter is: add 99.14g of phenyltrimethoxysilane and 8.12g of hexamethyldisiloxane into a 500mL three-port Stir the flask evenly at room temperature, add 0.9g hydrochloric acid and 22.5g deionized water, react at 25°C for 6h, then add 106.35g 3-(2,3-glycidoxy)propyltrimethoxysilane, 12.42 g 3-methacryloyloxypropyltrimethoxysilane, 0.62g boric acid and 8.12g hexamethyldisiloxane, react at 80°C for 1h, and finally remove low boilers to obtain high refractive index viscosity Knot Promoter 1 with a refractive index of 1.526.

[0020] Preparation of addition-type silicone encapsulant samples: 100 parts by mass of vinylphenyl silicone resin with a vinyl content of 3.6wt%, 20 parts by mass of vinylphenyl silicone oil with a viscosity of 1000mPa·s, 15 parts by mass of active hydrogen content 0.5 wt% of phenyl hydrogen-containing silicone oil, 20 mass parts of phenyl hydrogen-containing silicone resi...

Embodiment 2

[0022] In this example, the preparation method of the high refractive index adhesion promoter is: add 120.18g of phenyltriethoxysilane and 20.26g of trimethylmethoxysilane into a 500mL tank equipped with a thermometer, mechanical stirring and a condensing return tube Stir the three-necked flask evenly at room temperature, add 0.36g of sulfuric acid and 72g of deionized water, react at 40°C for 3h, then add 69.6g of 3-(2,3-glycidoxy)propyltriethoxysilane, 58.09g of 3-methacryloxypropylmethyldimethoxysilane, 3.09g of boric acid and 11g of trimethylmethoxysilane were reacted at 80°C for 1h, and finally the low boilers were removed to obtain high Refractive Index Adhesion Promoter 2 with a refractive index of 1.524.

[0023] The method for preparing the addition-type silicone encapsulant sample in this example is basically the same as that in Example 1, except that the adhesion promoter 1 in Example 1 is changed to adhesion promoter 2. The properties of the samples are shown in T...

Embodiment 3

[0025] In this example, the preparation method of the high refractive index adhesion promoter is: add 122.18g of diphenyldimethoxysilane and 20.04g of divinyltetramethyldisiloxane into the A 500mL three-necked flask with a reflux tube, stirred evenly at room temperature, added 0.72g of acetic acid and 36g of deionized water, reacted at 50°C for 2h, then added 12.32g of 2-(3,4-epoxycyclohexyl)ethyl Trimethoxysilane, 130.69g 3-methacryloxypropyltriethoxysilane, 12.37g boric acid and 7.92g divinyltetramethyldisiloxane, react at 70°C for 3h, and finally remove Low boilers, made of high refractive index adhesion promoter 3, the refractive index is 1.546.

[0026] The method for preparing the addition-type silicone encapsulant sample in this example is basically the same as that in Example 1, except that the adhesion promoter 1 in Example 1 is changed to adhesion promoter 3. The properties of the samples are shown in Table 1 and Table 2.

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Abstract

The invention discloses a preparation method of a high-refractive index addition type adhesion promoter for an organosilicone sealing adhesive. The method comprises the following steps: uniformly stirring phenylsilane and a capping agent at room temperature, adding a catalyst and deionized water, performing a reaction at 25-80 DEG C for 1-6 h, then adding epoxy silane, ester silane, boric acid andthe capping agent, performing a reaction at 40-80 DEG C for 1-6 h, and finally removing low-boiling-point substances to prepare the high-refractive index adhesion promoter. The adhesion promoter prepared in the invention has a high refractive index and a significant tackifying effect. The preparation method in the invention has the advantages of simplicity, easiness in implementation, avoiding ofring opening and other side reactions of epoxy groups, environmental protection, easily available raw materials, and easiness in realization of industrial production.

Description

technical field [0001] The invention relates to the technical field of silicone encapsulation materials, in particular to a preparation method of an adhesion promoter for high refractive index addition type silicone encapsulation glue. Background technique [0002] Packaging materials have an important impact on the performance and service life of LED devices. High refractive index addition type silicone encapsulants use less platinum catalyst when curing, do not produce other by-products, can be quickly and deeply cured, have high dimensional stability, low linear shrinkage, good chemical stability and heat resistance stability, especially The light extraction efficiency of the LED device packaged with it is high, and it has become one of the current high-performance packaging materials. However, the surface of the high-refractive-index addition type silicone encapsulant is non-polar groups after curing, and its bonding performance is poor, which limits its application ran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/20C09J11/08C09J183/07C09J183/05
CPCC08G77/20C08L2203/206C08L2205/025C08L2205/035C09J11/08C09J183/04C08L83/04
Inventor 潘科学梁广耀梁广伟吴明华凌林飞曾幸荣
Owner FOSHAN XINXIANGXING CHEM
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