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High-stability organic silicon emulsion, and preparation method and application thereof

A silicone emulsion, high stability technology, applied in the direction of coating, etc., can solve the problems affecting the performance of silicone emulsion, emulsion instability, etc., to achieve the effect of ensuring human health, simple production process, and good emulsification effect

Inactive Publication Date: 2015-01-07
INST OF IND TECH GUANGZHOU & CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the molecular structure of the above-mentioned silicone emulsions all contain Si-O-C groups. If the dropping rate of the silane monomer is not properly controlled, it is easy to hydrolyze and condense in the water environment to produce a large amount of gel, which will cause the emulsion to be unstable, thus affecting the silicone emulsion. The final performance of

Method used

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  • High-stability organic silicon emulsion, and preparation method and application thereof
  • High-stability organic silicon emulsion, and preparation method and application thereof
  • High-stability organic silicon emulsion, and preparation method and application thereof

Examples

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Embodiment 1

[0047] A highly stable silicone emulsion in this embodiment includes the following raw materials in parts by weight: 10 parts of silane monomer, 0.05 part of emulsifier, 0.03 part of initiator, and 89.92 parts of deionized water, wherein the silane monomer is Allyltris(trimethylsiloxy)silane;

[0048] The emulsifier is isomeric tridecanyl polyoxyethylene ether (5): sodium lauryl sulfate with a mass ratio of 5:1;

[0049] The initiator is potassium persulfate.

[0050] The preparation method of above-mentioned silicone emulsion is as follows:

[0051] (1) Preparation of pre-emulsion

[0052] At room temperature, pour 89.92 parts of deionized water and 0.05 parts of emulsifier into a four-neck flask in turn, stir at 800r / min for 10 minutes, then add 10 parts of silane monomer to the constant pressure dropping funnel, and drop it within 5 minutes to In the four-neck flask, continue to stir for 0.5h, and ultrasonically for 10min to obtain a stable milky white pre-emulsion;

[...

Embodiment 2

[0060] A high-stability silicone emulsion in this embodiment includes the following raw materials in parts by weight: 20 parts of silane monomer, 0.4 part of emulsifier, 0.16 part of initiator, and 79.44 parts of deionized water, wherein the silane monomer is γ - Methacryloxypropyltrimethylsilane;

[0061] The emulsifier is isomerized tridecyl alcohol polyoxyethylene ether (5) and sodium dodecylsulfonate with a mass ratio of 1:5;

[0062] The initiator is potassium persulfate.

[0063] The preparation method of above-mentioned silicone emulsion is as follows:

[0064] (1) Preparation of pre-emulsion

[0065] At room temperature, pour 79.44 parts of deionized water and 0.4 parts of emulsifier into a four-necked flask in turn, stir at 800r / min for 10 minutes at high speed, then add 20 parts of silane monomer to the constant pressure dropping funnel, and drop it to In the four-neck flask, continue to stir for 0.5h, and ultrasonically for 10min to obtain a stable milky white pr...

Embodiment 3

[0073] A high-stability silicone emulsion in this embodiment includes the following raw materials in parts by weight: 35 parts of silane monomers, 1.05 parts of emulsifiers, 0.32 parts of initiators, and 63.63 parts of deionized water, wherein the silane monomers are γ - Methacryloxypropyltris(trimethylsiloxy)silane;

[0074] The emulsifier is isomeric tridecyl alcohol polyoxyethylene ether (5) and isomeric tridecyl alcohol polyoxyethylene ether (5) sodium sulfonate with a mass ratio of 1:1;

[0075] The initiator is potassium persulfate.

[0076] The preparation method of above-mentioned silicone emulsion is as follows:

[0077] (1) Preparation of pre-emulsion

[0078] At room temperature, pour 63.63 parts of deionized water and 1.05 parts of emulsifier into a four-neck flask in sequence, stir at a high speed of 900r / min for 10 minutes, then add 35 parts of silane monomer to the constant pressure dropping funnel, and drop it to In the four-neck flask, continue to stir for ...

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Abstract

The invention discloses a high-stability organic silicon emulsion, and a preparation method and application thereof. The organic silicon emulsion is prepared from the following raw materials in parts by weight: 10-60 parts of silane monomer, 0.03-6 parts of emulsifier, 0.03-1.2 parts of initiator and 34.0-90.0 parts of deionized water. The silane monomer is one or more of compounds disclosed as Formula (j). The organic silicon emulsion is prepared from the silane monomer with low-hydrolysis-tendency Si-C group or Si-O-Si group; hydrolytic condensation and other side reactions can not easily occur in the emulsion polymerization reaction process, so that the production technique is easy to control; and the obtained organic silicon emulsion has excellent stability, can not have the phenomenon of stratification, floating oil or demulsification after being stored at normal temperature for more than 6 months, and can be widely used in the fields of architectural waterproofing, textile assistants, protection of historical relics and the like.

Description

technical field [0001] The invention relates to the technical field of polymer synthesis, in particular to a highly stable silicone emulsion and its preparation method and application. Background technique [0002] Silicone emulsion is a kind of high-performance special material, and it is also one of the new materials with rapid development and wide application in recent years, and has been widely concerned. [0003] At present, patent reports on silicone emulsions mostly focus on the emulsion preparation of alkoxysilanes, such as formulas (a), (b) and (c). U.S. Patent US4877654, prepared alkoxysilane porous waterproof emulsion by phase inversion method; U.S. Patent US5091002, prepared alkoxysilane and alkoxy polyorganosilicon emulsion by mechanical stirring and high pressure homogenization; domestic patent CN101143929A, a series of water-based chain alkyl organosilicon emulsions are prepared by mechanical stirring emulsification method. [0004] [0005] However, the ...

Claims

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Application Information

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IPC IPC(8): C08F130/08C08F138/00C08F2/26C08F2/30C09D183/07
Inventor 杨番哈成勇刘海峰
Owner INST OF IND TECH GUANGZHOU & CHINESE ACADEMY OF SCI
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