Modified sulfydryl-containing liquid silicone resin, non-toxic, colorless and odorless light-cured liquid silicone rubber and preparation method and application thereof

A liquid silicon and light-curing technology, which is applied in the field of non-toxic and tasteless light-curing silicone materials, can solve the problems of bad smell and high toxicity, and achieve the effects of moderate viscosity, fast curing speed and high application value

Active Publication Date: 2021-11-12
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These small molecular substances are easy to escape before the liquid silicone rubber is cured, especially the introduction of small molecular crosslinking agents containing mercapto and acrylate d

Method used

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  • Modified sulfydryl-containing liquid silicone resin, non-toxic, colorless and odorless light-cured liquid silicone rubber and preparation method and application thereof
  • Modified sulfydryl-containing liquid silicone resin, non-toxic, colorless and odorless light-cured liquid silicone rubber and preparation method and application thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0046] Provides a method for preparing a photocurable liquid silicone rubber solution is prepolymerized in some specific aspect of the invention, the following production method comprising:

[0047] S1-1) Preparation of the vinyl-modified silica

[0048]

[0049] Vinyl-modified silica was prepared as shown in formula (1).

[0050] Take silica dissolved in a vessel containing solvent, after ultrasonic dispersion, was added vinyl dimethylchlorosilane and trimethylchlorosilane composition under heating, after completion of the reaction was dried under reduced pressure to give a vinyl surface modified silica powder.

[0051] Wherein the solvent is n-hexane, cyclohexane, ethyl acetate, butyl acetate, a mixture of one or more of toluene; preferably, the solvent is n-hexane and ethyl acetate, the mixing volume ratio of 1: 1 .

[0052] Preferably, the silica is a fumed silica, precipitated silica, airgel of one or a mixture of two or more; when used in combination, the mixing ratio is n...

Example Embodiment

[0074] Example 1

[0075] Liquid silicone and the corresponding mercapto containing a modified non-toxic, colorless and odorless photo-curable liquid silicone rubber, were prepared by the following methods:

[0076] Preparing a liquid silicone-modified thiol group-S1)

[0077] Preparation of the vinyl-modified silica S1-1)

[0078] Take 5.0g 0.4g of fumed silica with trimethylsilyl chloride and vinyl dimethylchlorosilane 0.1g was added to 50g compositions of hexane and ethyl acetate 1: 1 mixed solvent, after ultrasonic dispersion 10min, at 40 ℃ for 4h, after suction and dried in vacuo to give the modified silica powder.

[0079] S1-2) Preparation of mercapto group-containing liquid silicone modified

[0080] 8g taken mercaptopropyl trimethoxysilane, 2g mercaptopropyl methyl dimethoxy silane, 8g dimethyl dimethoxysilane, 2g trimethoxysilane, 4.0g of ultrapure water, 20g hexamethyldisilazane after ether (MM), 0.1g of concentrated hydrochloric acid the reaction was stirred at 50 ℃, s...

Example Embodiment

[0084] Example 2

[0085] Liquid silicone and the corresponding mercapto containing a modified non-toxic, colorless and odorless photo-curable liquid silicone rubber, were prepared by the following methods:

[0086] Preparing a liquid silicone-modified thiol group-S1)

[0087]S1-1) Preparation of vinyl modified white carbon black

[0088] 5.0 g of gas-phase white carbon black and 0.4 g of trimethyl chloride and 0.1 g of vinyl dimethylcmesilane composition were added to 1: 1 mixed solvent of 50 g of n-hexane and ethyl acetate, ultrasonic dispersion 10min, at 50 The reaction was reacted at ° C for 3 h, and the modified white carbon black powder was obtained after evacuation.

[0089] S1-2) Preparation of modified mercapto-based liquid silicone resin

[0090] Take 6.0 g of mercaptopyltrimethoxysilane, 4.0 g of mercaptomethyl dimethoxysilane, 5.0 g of dimethyl dimethoxysilane, 5.0 g of trimethoxysilane, 5.0 g of ultra-pure water, 30g six Methyl silica ether (mm), 0.05 g of concentrate...

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Abstract

The invention discloses a preparation method and application of modified sulfydryl-containing liquid silicone resin and non-toxic, colorless and odorless light-cured liquid silicone rubber. The modified sulfydryl-containing liquid silicon resin is prepared by the following steps: S1-1) preparing vinyl modified white carbon black; S1-2) preparing modified sulfydryl-containing liquid silicon resin: stirring and reacting a mercaptopropyl silane coupling agent, dimethyl dialkoxy silane, trialkoxy silane, an end-capping reagent, a solvent and an acid catalyst under a heating condition to obtain the sulfydryl-containing liquid silicon resin; and reacting a photoinitiator, the vinyl modified white carbon black prepared in the step S1) and an acid catalyst to obtain the modified sulfydryl-containing liquid silicon resin. The initiator, the filler, the cross-linking agent and other components are in bond connection with the self-made-SH liquid silicon resin through chemical reaction, the problems that traditional light-cured silicon rubber has unpleasant smell before curing, small molecule components are prone to escaping and the like are fundamentally solved, and the light-cured silicon rubber can be applied to medical light-cured materials.

Description

technical field [0001] The invention relates to the field of non-toxic and tasteless light-curing silicone materials, in particular to a preparation method and application of a modified mercapto-containing (-SH) liquid silicone resin and non-toxic, colorless and tasteless extremely fast light-curing liquid silicone rubber. Background technique [0002] Organosilicon materials not only have excellent water resistance, high and low temperature resistance, aging resistance, and good insulation, but also have good biocompatibility and air permeability, and are non-toxic and harmless. Therefore, organosilicon materials have been widely used in medical, In the medical beauty industry. [0003] Common photocurable silicone materials are classified according to the photosensitive active functional groups used, and can be roughly divided into silicon hydrogen (-SiH) and vinyl (-CH=CH 2 ) type, acryloyloxy (CH 2 =CHCOO-) type, and -SH and -CH=CH 2 type etc. Among them, containing ...

Claims

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Application Information

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IPC IPC(8): C08G77/38C08L83/08C08L83/07
CPCC08G77/38C08L83/08C08L83/04C08L2205/035C08L2205/025
Inventor 何睿喻学锋康翼鸿余学成陈曦张光武
Owner SHENZHEN INST OF ADVANCED TECH
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