Preparation method of durable liquid silica gel

A liquid silicone, durable technology, applied in the field of silicone, can solve the problems of poor mechanical properties, low viscosity of liquid silicone, etc., to achieve the effect of increased vulcanization strength, improved mechanical properties of the colloid, and enhanced cross-linked network structure of the polymer

Inactive Publication Date: 2021-09-17
深圳精灿材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The liquid silica gel of this invention has the characteristics of low viscosity, high transparency and fast curing speed, but still has the problem of poor mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation method of the modified sodium bicarbonate is as follows: take 8-12 parts of sodium bicarbonate and 44-66 zirconia balls and pour them into a ball mill jar to make sodium bicarbonate powder; 0.8-1.2 parts of stearic acid Pour into an appropriate amount of absolute ethanol, stir to fully dissolve the stearic acid in the absolute ethanol, and prepare a stearic acid solution; pour the stearic acid solution into a ball mill jar, and blend it with sodium bicarbonate powder, Mill in a ball mill with a rotation speed of 250-350r / min for 2h, and then place the mixture in a blast drying oven at 45°C to evaporate absolute ethanol to obtain modified sodium bicarbonate.

[0026] The preparation method of the A component is:

[0027] (1) Weigh the terminal vinyl side chain vinyl silicone oil in parts by mass, vacuum-dry it at 100-150°C for 24-36 hours, the relative vacuum degree is ≥0.1 Mpa, and cool it to 25°C;

[0028] (2) Put the dried vinyl-terminated side-chain ...

Embodiment 1

[0032] A long-lasting and durable liquid silicone, including the following raw materials: vinyl-terminated side-chain vinyl silicone oil and catalyst as component A, vinyl-terminated side-chain vinyl silicone oil and cross-linking agent as component B, in component B Add low-molecular-weight polyethylene glycol as a stabilizer to ensure product stability and transparency, and add γ-aminopropyltriethoxysilane, modified sodium bicarbonate, and hydrogen-containing silicone oil;

[0033] In terms of parts by mass, component A is prepared from 50 parts of vinyl-terminated side-chain vinyl silicone oil and 0.4 parts of organotin; component B is prepared from 50 parts of vinyl-terminated side-chain vinyl silicone oil and 3 parts of ethyl orthosilicate , 3 parts of polyethylene glycol, 0.8 parts of γ-aminopropyltriethoxysilane, 0.35 parts of modified sodium bicarbonate, and 18 parts of hydrogen-containing silicone oil.

[0034] The preparation method of the modified sodium bicarbonate...

Embodiment 2

[0041] A long-lasting and durable liquid silicone, including the following raw materials: vinyl-terminated side-chain vinyl silicone oil and catalyst as component A, vinyl-terminated side-chain vinyl silicone oil and cross-linking agent as component B, in component B Add low-molecular-weight polyethylene glycol as a stabilizer to ensure product stability and transparency, and add γ-aminopropyltriethoxysilane, modified sodium bicarbonate, and hydrogen-containing silicone oil;

[0042] In terms of parts by mass, component A is prepared from 60 parts of vinyl end-chain side chain vinyl silicone oil and 0.2 part of organotin; component B consists of 60 parts of end-vinyl side chain vinyl silicone oil and 1 part of ethyl orthosilicate , 1-4 parts of polyethylene glycol, 1.0 parts of γ-aminopropyltriethoxysilane, 0.30 parts of modified sodium bicarbonate, and 17 parts of hydrogen-containing silicone oil.

[0043] The preparation method of the modified sodium bicarbonate is as follow...

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PUM

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Abstract

The invention discloses a preparation method of durable liquid silica gel, and belongs to the technical field of silica gel. The durable liquid silica gel comprises the following components of vinyl-terminated side-chain vinyl silicone oil and a catalyst are used as a component A, vinyl-terminated side-chain vinyl silicone oil and a cross-linking agent are used as a component B, and low-molecular-weight polyethylene glycol is added into the component B as a stabilizer to ensure the stability and transparency of a product, and gamma-aminopropyl triethoxy silane, modified sodium bicarbonate and hydrogen-containing silicone oil are added. The preparation method of the durable liquid silica gel comprises the following steps: mixing the component A and the component B according to a ratio of 1: 1, volume ratio or weight ratio, and then directly using. Through the synergistic effect of the gamma-aminopropyl triethoxy silane, the modified sodium bicarbonate and the hydrogen-containing silicone oil, the tensile strength and the tensile elongation at break of the liquid silica gel are improved.

Description

technical field [0001] The invention belongs to the technical field of silica gel, and in particular relates to a preparation method of durable liquid silica gel. Background technique [0002] Liquid rubber is a new type of silica gel developed in the 1970s, and it is a high-grade variety of silica gel. Compared with other types of silica gel, liquid silica gel is easy to use, generally does not require complex and large-scale processing equipment, and can be processed by coating, injection, extrusion, etc., and vulcanized at room temperature or under heating conditions. Compared with thermally vulcanized silicone materials, processing processes such as mixing, compounding of vulcanizing agents, tableting, and post-vulcanization can be omitted, saving energy and reducing manpower input, high production efficiency, short processing cycle, and low processing cost. At present, liquid silicone has been more and more widely used in the fields of biomedicine, aerospace, electroni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08L71/02C08K5/544C08K5/09C08J9/08
CPCC08J9/08C08J9/0061C08J9/0042C08J9/0023C08J9/0095C08J2203/02C08J2383/07C08J2483/05C08J2471/02
Inventor 杨舒敏
Owner 深圳精灿材料技术有限公司
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