Boron-containing organosilicone tackifier in linear structure and preparation method thereof

A linear structure, silicone technology, applied in the direction of polymer adhesive additives, adhesive additives, etc., can solve the problems of silicone tackifier influence, unfavorable diffusion, difficult to remove, etc., to improve adhesive performance and repeatability and controllability, the effect of improving the bonding performance

Inactive Publication Date: 2019-05-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The preparation methods for preparing silicone tackifiers disclosed in the above patents all use a homogeneous catalyst titanate catalyst. The use of this catalyst is difficult to remove in the later stage of the reaction, and there will be a small amount of residue, which is unfavorable to the synthesized silicone tackifier. Impact
Moreover, the synthesized products are all macromolecular substances with a network structure, which is not conducive to diffusing in the silicone rubber to the interface formed between the silicone rubber and the adhered substrate, resulting in the synthetic silicone tackifier not being able to play a good role in promoting silicon. The role of rubber adhesive properties

Method used

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  • Boron-containing organosilicone tackifier in linear structure and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] This embodiment provides a boron-containing silicone tackifier with a linear structure and a preparation method thereof.

[0026] Take 6.18g of boric acid powder and dissolve it in ethanol, mix it with 22.03g of γ-glycidyl etheroxypropylmethyldimethoxysilane and 13.22g of vinylmethyldimethoxysilane, and add it to a tank equipped with magnetic stirring and temperature control. In a 250ml three-necked flask of a device, a basic anion exchange resin accounting for 1% of the total reactant mass fraction was added and reacted at 95° C. for 4 h. After the reaction, filter the product under reduced pressure to remove the basic anion exchange resin, then transfer the filtrate to a round-bottomed distillation flask, and remove by-products in the system at 100°C and -0.096MPa to obtain an orange transparent A boron-containing silicone adhesion promoter with a linear structure.

Embodiment 2

[0028] This embodiment provides a boron-containing silicone tackifier with a linear structure and a preparation method thereof.

[0029] Take 6.18g of boric acid powder and dissolve it in ethanol, mix it with 44.06g of γ-glycidyl etheroxypropylmethyldimethoxysilane and 26.44g of vinylmethyldimethoxysilane, and add it to a tank equipped with magnetic stirring and temperature control. In a 250ml three-necked flask of a device, a basic anion exchange resin accounting for 1% of the total reactant mass fraction was added and reacted at 95° C. for 4 h. After the reaction, filter the product under reduced pressure to remove the basic anion exchange resin, then transfer the filtrate to a round-bottomed distillation flask, and remove by-products in the system at 100°C and -0.096MPa to obtain an orange transparent A boron-containing silicone adhesion promoter with a linear structure.

Embodiment 3

[0031] This embodiment provides a boron-containing silicone tackifier with a linear structure and a preparation method thereof.

[0032] Take 6.18g of boric acid powder and dissolve it in ethanol, mix it with 22.03g of γ-glycidyl etheroxypropylmethyldimethoxysilane and 16.03g of vinylmethyldiethoxysilane, and add it to a tank equipped with magnetic stirring and temperature control. In a 250ml three-necked flask of a device, a basic anion exchange resin accounting for 1% of the total reactant mass fraction was added and reacted at 95° C. for 4 h. After the reaction, filter the product under reduced pressure to remove the basic anion exchange resin, then transfer the filtrate to a round-bottomed distillation flask, and remove by-products in the system at 100°C and -0.096MPa to obtain an orange transparent A boron-containing silicone adhesion promoter with a linear structure.

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Abstract

The invention belongs to the technical field of LED (light emitting diode) organosilicone encapsulating materials and particularly relates to a boron-containing organosilicone tackifier in a linear structure and a preparation method thereof. The preparation method comprises taking basic anion exchange resin as a reaction catalyst, which is easy to remove through vacuum suction filtration. The preparation method of the boron-containing organosilicone tackifier in the linear structure is simple in preparation process, good in repeatability and controllability, mild in reaction conditions and easy to industrialize. By changing reaction conditions and reactant composition, the prepared boron-containing organosilicone tackifier in the linear structure has a viscosity of 142.6-178.7 mPa*s and arefractive index of 1.4137-1.4252 and is applicable to low-refraction-index addition type organosilicone rubber. The boron-containing organosilicone tackifier in the linear structure is good in compatibility with silicone rubber and free from catalyst poisoning. The boron-containing organosilicone tackifier in the linear structure can significantly improve the adhesive property of the silicone rubber, especially that of polyphthalamide (PPA).

Description

technical field [0001] The invention belongs to the technical field of LED organosilicon packaging materials, and in particular relates to a linear structure boron-containing organosilicon tackifier and a preparation method thereof. Background technique [0002] In the field of electronics industry, the use of adhesives can meet the development trend of miniaturization, integration and intelligence of electronic products. Silicone adhesives are widely used in the sealing and bonding of electronic components due to their excellent electrical insulation properties, good chemical stability and low stress characteristics. Among them, the addition-type silicone rubber adhesive has simple processing technology, stable product size, excellent high temperature resistance and aging resistance, and has broad development prospects. In recent years, it has been rapidly popularized and applied with the development of the LED industry. However, the addition-type silicone gel is highly sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/22C08G77/20C08G77/08C09J11/08
Inventor 潘朝群黄丙生
Owner SOUTH CHINA UNIV OF TECH
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