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Preparation method of water-based organic silicon composition

A silicone and water-based technology, which is used in the preparation of fine chemicals and the preparation of water-based silicone compositions, can solve problems such as blooming, oil slicks, and high costs

Pending Publication Date: 2022-04-12
南京瑞思化学技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The O / W silicone products prepared by these methods are not very stable, especially the "mechanical method". During the storage and shelf life, oil slicks and blooms often occur, which affect the use of downstream customers. How to solve this problem has been constantly It is a direction that scholars and engineers pay attention to
[0005] US4853474 improves the low temperature resistance of O / W silicone products through cross-linked silicon polyether, but this method is difficult to control the degree of cross-linking of silicon polyether itself, so the stability of the product is difficult to ensure consistency; US5451692 The application of the introduced alkyl silicon polyether in the preparation of water-in-oil products improves the compatibility with the oil phase components through the introduction of alkyl groups
CN200810019295.1 adopts the method of compounding high-viscosity emulsifier and low-viscosity emulsifier to prepare O / W type silicone product, trying to disperse high-viscosity silicone composition in water to obtain O / W type silicone product; CN201010584419.8 is to prepare O / W type silicone products by means of strong shearing of various equipment; EP-A-163541 introduces that the preparation of high viscosity O / W type silicone products is difficult and requires high cost , and it doesn't work well

Method used

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  • Preparation method of water-based organic silicon composition
  • Preparation method of water-based organic silicon composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Silicone resin dispersion A

[0054] 25 parts of silicone resin (made by the reaction of methyltriethoxysilane, tetraethyl orthosilicate, and trimethylchlorosilane, with an average molecular weight of 2200 and a hydroxyl content of 6.5%), 2 parts of isomeric decyl alcohol polyoxyethylene Add ether (5) into the container, start stirring, and stir at a speed of 1,000rpm, control the temperature at 10°C, add 25 parts of water to the above mixture in 20 minutes, and then pass through the equipment with a pressure of 0.1MPa to make the silicone resin The particle size is less than 5 μm, and at this time, silicone resin dispersion A is obtained;

[0055] Cyclosiloxane Dispersion B

[0056] Add 0.002 parts of acid catalyst octadecylbenzenesulfonic acid, 3 parts of Pingpingjia 30 and 19 parts of water into the container, start stirring at 1,000 rpm, control the temperature at 60°C, and drop it into the above mixture over 80 minutes Add 25 parts of decamethylcyclopentasiloxane...

Embodiment 2

[0060] Silicone resin dispersion A

[0061] 2.8778 parts of silicone resin (prepared from trimethylchlorosilane, diphenyldiethoxysilane, and ethyl orthosilicate, with a molecular weight of 4,800 and an alkoxy content of 15%), 0.06 parts of polystearic acid Add oxyethylene ether (7) into the container, start stirring, stir at a speed of 5000rpm, control the temperature at 70°C, add 42 parts of water to the above mixture in 60 minutes, and then pass through the equipment with a pressure of 5MPa to make the silicone resin The particle size is less than 5 μm, and at this time, silicone resin dispersion A is obtained;

[0062] Cyclosiloxane Dispersion B

[0063] Add 0.001 parts of phosphoric acid, 3 parts of AEO-9 and 41 parts of water into the container, start stirring at 2,000rpm, control the temperature at 90°C, add 10 parts of octamethylcyclotetra Siloxane, keep warm for 10h after the dropwise addition, and finally add 0.0006 parts of tetramethylammonium hydroxide to obtain c...

Embodiment 3

[0067] Silicone resin dispersion A

[0068] 40 parts of silicone resin (prepared from hexamethyldisiloxane and ethyl orthosilicate, the molar ratio of M / Q is 0.75:1, the molecular weight is 3,000, and the alkoxy content is 10%), 2 parts Add Span 80 and 2 parts of Tween 85 into the container, start stirring, stir at 10,000rpm, control the temperature at 50°C, add 36.5 parts of water to the above mixture in 45 minutes, and then pass through the equipment with a pressure of 2MPa to make the silicone The particle size of the resin is less than 5 μm, and the silicone resin dispersion A is obtained at this time;

[0069] Cyclosiloxane Dispersion B

[0070] Add 2 parts of hydrochloric acid, 3 parts of isomeric secondary dodecyl alcohol polyoxyethylene ether (25) and 5 parts of water into the container, start stirring at a speed of 500rpm, control the temperature at 40°C, and add it to the above mixture for 40 minutes Add 36 parts of octadecylcyclotetrasiloxane dropwise, keep warm f...

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Abstract

The invention discloses a preparation method of a water-based organic silicon mixture. The mixture comprises the following components: organic silicon resin, cyclosiloxane, an acid catalyst, a basic catalyst, a cross-linking agent, a surfactant and water. The organic silicon resin and cyclosiloxane respectively form dispersion liquids, then spatial docking of fine particles is realized under the action of a cross-linking agent and a catalyst, the stable dispersion liquid is obtained, and the emulsion prepared by the method has excellent storage stability and freezing-resistant stability, can be used for preparing series of organic silicon products, and has wide application prospects. The method is widely applied to the industries of building materials, coatings, tires, polyurethane and the like.

Description

technical field [0001] This patent relates to a preparation method of a water-based organosilicon composition, which belongs to the category of fine chemicals preparation. Background technique [0002] Compared with carbon-structured materials, silicone materials have lower surface tension, better adhesion, and stronger hydrophobicity. Therefore, silicone has been widely used since it came out in the 1950s, and has penetrated into the national in various fields of the economy. [0003] From the perspective of external form, silicone products are mainly divided into solvent type, emulsion type, solid type and stock solution type. According to different application scenarios, silicone emulsions are widely used in water-based systems; solid silicones are mainly mixed with solid products. Specific silicone products mainly include waterproofing agent, defoaming agent, mold release agent, emulsifier, anti-fogging agent, anti-settling agent and so on. CN99813908 uses an alkoxy...

Claims

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Application Information

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IPC IPC(8): C08J3/03C08L83/04C08L83/07C08L83/05C08K5/549
Inventor 不公告发明人
Owner 南京瑞思化学技术有限公司