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Vinyl silicon resin for moderate-refractive-index LED and preparation method thereof

A technology of vinyl silicone resin and refractive index, which is applied in the field of vinyl silicone resin, vinyl silicone resin for refractive index LED and its preparation, can solve the problems of poor product stability and poor reaction controllability, and achieve short preparation route, The effect of convenient operation and mild reaction conditions

Inactive Publication Date: 2015-12-16
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a vinyl silicone resin for medium refractive index LEDs and a preparation method thereof. The vinyl silicone resin for medium refractive index LEDs and the preparation method thereof solve the problem of The technical problems of the vinyl silicone resin used for medium refractive index LEDs in the prior art are poor controllability of reaction and poor product stability

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A vinyl silicone resin for medium refractive index LEDs, calculated in parts by weight, its raw material composition and content are as follows:

[0046] 100 parts of phenyltrimethoxysilane

[0047] Vinyl ring body 20 parts

[0048] Vinyl double head 30 parts

[0049] 20 parts of distilled water

[0050] 100 parts of solvent

[0051] Catalyst 3 parts

[0052] Described solvent is toluene;

[0053] The catalyst is an aqueous sulfuric acid solution with a concentration of 70% by mass.

[0054] The above-mentioned preparation method of vinyl silicone resin for medium refractive index LED, the steps are as follows:

[0055] Add 100 parts of phenyltrimethoxysilane, 20 parts of vinyl ring body, 30 parts of vinyl double head, 20 parts of distilled water, 100 parts of solvent and 3 parts of catalyst into the container in sequence, raise the temperature to 60°C, and keep the temperature constant under stirring 4h, then raise the temperature to 100°C, react at constant tem...

Embodiment 2

[0060] A vinyl silicone resin for medium refractive index LEDs, calculated in parts by weight, its raw material composition and content are as follows:

[0061] 105 parts of phenyltrimethoxysilane

[0062] Vinyl ring body 10 parts

[0063] Vinyl double head 50 parts

[0064]60 parts of distilled water

[0065] 200 parts of solvent

[0066] Catalyst 5 parts

[0067] Described solvent is benzene;

[0068] The catalyst is an aqueous solution of hydrochloric acid with a concentration of 38% by mass.

[0069] The above-mentioned preparation method of vinyl silicone resin for medium refractive index LED, the steps are as follows:

[0070] Add 105 parts of phenyltrimethoxysilane, 10 parts of vinyl ring body, 50 parts of vinyl double head, 60 parts of distilled water, 200 parts of solvent and 5 parts of catalyst into the container in sequence, raise the temperature to 40°C, and keep the temperature constant under stirring 8h, then raise the temperature to 130°C, react at a cons...

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Abstract

The invention discloses vinyl silicon resin for a moderate-refractive-index LED. The vinyl silicon resin is prepared from, by weight, 100-105 parts of phenyl trimethoxysilane, 10-20 parts of tetravinyl tetramethyl cyelo tetrasiloxane, 20-60 parts of distilled water, 30-50 parts of divinyl tetramethyl disiloxane, 100-200 parts of solvent and 3-5 parts of catalyst. The invention further provides a preparation method of the vinyl silicon resin. The phenyl trimethoxysilane, the tetravinyl tetramethyl cyelo tetrasiloxane, the distilled water, the divinyl tetramethyl disiloxane, the solvent and the catalyst are added into a container, the temperature is improved to be 40-60 DEG C, the constant temperature is kept for 4-8 hours while stirring, the temperature is improved to be 100-130 DEG C, constant-temperature reaction is performed for 4-8 hours while stirring, reaction liquid is subjected to washing with the distilled water till the reaction liquid is neutral, and then reduced-pressure distillation is performed under the condition that the temperature is controlled to be 200 DEG C and the pressure is controlled to be -0.096 MPa to obtain the vinyl silicon resin for the high-light-transmittance moderate-refractive-index LED. The vinyl silicon resin prepared by means of the preparation method is better in stability.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a vinyl silicone resin, in particular to a vinyl silicone resin for medium refractive index LEDs and a preparation method thereof. Background technique [0002] At present, LED encapsulants are mainly composed of vinyl silicone resin and hydrogen-containing silicone resin. Among them, vinyl silicone resin is used as the base resin of LED encapsulation adhesive. Vinyl silicone resins sold on the market are generally divided into two types, one is the traditional low-refractive index methyl vinyl silicone resin, its refractive index is lower than 1.41, the price is relatively low, and it is often used in low-end low-power LED devices packaging; there is another kind of high-refractive index phenyl vinyl silicone resin, whose refractive index is higher than 1.50, and the price is much higher than that of low-refractive index methyl vinyl silicone resin, which is suitable for high-end...

Claims

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Application Information

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IPC IPC(8): C08G77/20C08G77/06
Inventor 张英强吴郢珊单昌礼李烨金程威
Owner SHANGHAI INST OF TECH
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