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Vinyl silicone resin, and preparation method and application thereof

A technology of vinyl silicone resin and divinyltetramethyldisilazane, which is applied in the field of silicone materials to achieve the effect of optimized hardness, high transparency, and long-term storage stability

Active Publication Date: 2016-11-02
SHANGHAI HUITIAN NEW CHEMICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the usual addition-type silica gel (such as hydrogen-containing silicone oil, VQM) cannot meet this requirement

Method used

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  • Vinyl silicone resin, and preparation method and application thereof
  • Vinyl silicone resin, and preparation method and application thereof
  • Vinyl silicone resin, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] Add 60 grams of hydroxysilicone resin YR3370, 30 grams of hydroxysilicone oil 107, 40 grams of divinyltetramethylsilazane, and 150 grams of xylene into a three-necked flask equipped with a condenser and a magnetic stirring device, protect it with nitrogen, and stir it magnetically. The reaction was carried out at 80° C. for 4 hours.

[0103] Use a rotary evaporator (oil bath temperature 150°C to 185°C, vacuum degree below 5mbar) to remove solvent, silanol, divinyltetramethyldisiloxane, water, ammonia, unreacted silazane and some small molecules Silicone. Obtain a colorless and transparent vinyl silicone resin with a viscosity of 4500cp and a density of 1.18g / cm 3 , the vinyl content is 2.8mmol / g, long-term storage will not be phase-separated and foggy.

[0104] Take 20 grams of the above-mentioned vinyl silicone resin, mix it with 6 grams of hydrogen-containing silicone oil 1.0H, and then add dropwise 0.030 grams of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, 0.015 gr...

Embodiment 2

[0107] Add 120 grams of hydroxyl silicone resin TSR144, 20 grams of hydroxyl silicone oil 107, 20 grams of hydroxyl vinyl silicone oil 116-2, 30 grams of divinyltetramethyldisilazane, and 150 grams of xylene into a device equipped with a condenser and a magnetic stirring device In a three-necked flask, nitrogen protection, magnetic stirring. The reaction was carried out at 80° C. for 12 hours. Afterwards, 20 g of hexamethyldisilazane (purchased from Sinopharm Chemical Reagent Co., Ltd., with a purity greater than 98%) was added, and stirred at 80° C. for 12 hours to remove excess hydroxyl groups or water.

[0108] Use a rotary evaporator (oil bath temperature 150°C to 185°C, vacuum degree below 5mbar) to remove solvent, silanol, divinyltetramethyldisiloxane, water, ammonia, unreacted silazane and some small molecules Silicone. Obtain a colorless and transparent vinyl silicone resin with a viscosity of 5500cp and a density of 1.16g / cm 3 , the vinyl content is 1.9mmol / g, long...

Embodiment 3

[0112] Add 60 grams of hydroxysilicone resin MK resin, 60 grams of hydroxyvinyl silicone oil 116-2, 60 grams of divinyltetramethyldisilazane, and 150 grams of ethyl acetate into a three-necked flask equipped with a condenser and a magnetic stirring device , nitrogen protection, magnetic stirring. React at 70°C for 24 hours.

[0113] Use a rotary evaporator (oil bath temperature 150°C to 185°C, vacuum degree below 5mbar) to remove solvent, silanol, divinyltetramethyldisiloxane, water, ammonia, unreacted silazane and some small molecules Silicone. Obtain a colorless and transparent vinyl silicone resin with a viscosity of 6500cp and a density of 1.18g / cm 3 , the vinyl content is 1.0 mmol / g.

[0114] Take 20 grams of the above-mentioned vinyl silicone resin, mix it with 15 grams of hydrogen-containing silicone resin crosslinker200, and then add dropwise 0.030 grams of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, 0.015 grams of γ -(methacryloyloxy)propyltrimethoxysilane, 0.030 ...

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Abstract

The invention relates to a method for preparing vinyl silicone resin. The method comprises the following steps: in a solvent, reacting at least one compound containing Si-OH group with divinyltetramethyldi-silazane (H2C=CH)Si(CH3)2NHSi(CH3)2(CH = CH2) under the condition of heating; and separating and purifying to prepare the vinyl silicone resin. The vinyl silicone resin prepared by the invention has the advantages of high density and good long-term storage stability, and can solve the problems of phase separation, atomization and the like. The invention also relates to the vinyl silicone resin prepared by the method, and application of the vinyl silicone resin to the preparation of an addition-type organosilicon solid crystal glue. The solid crystal glue chip has the advantages of high bonding force and low crystal drop rate, and adjustable hardness, modulus and toughness.

Description

technical field [0001] The present invention relates to the technical field of organosilicon materials, and more specifically, relates to a method for preparing vinyl silicone resin, the vinyl silicone resin prepared by the method and its use in crystal bonding glue. Background technique [0002] The basic resin system of addition-type liquid silicone rubber is mainly vinyl silicone and hydrogen-containing silicone. Vinyl silicone includes vinyl silicone oil and vinyl silicone resin. Vinyl silicone oil and vinyl silicone resin are usually prepared by hydrolysis and condensation reactions of chlorosilane, cyclosiloxane and siloxane with vinyl functional group, or chlorosilane with vinyl functional group. Vinyl silicone resins can also be prepared by hydrolysis of silicate esters, sodium silicate and divinyldisiloxane. The addition-type silica gel prepared solely with vinyl silicone oil has a low degree of crosslinking and poor mechanical strength. The pure vinyl silicone r...

Claims

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Application Information

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IPC IPC(8): C08G77/20C08G77/38C08L83/07
CPCC08G77/20C08G77/38C08L83/04
Inventor 潘志坚章婧朱仙娥冯依文吴经同
Owner SHANGHAI HUITIAN NEW CHEMICAL MATERIALS CO LTD