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Synthetic method of organosilicon polyurethane-acrylic ester ternary composite ionomer emulsion

An acrylate and ternary composite technology, which is applied in the field of synthesis of silicone-polyurethane-acrylate ternary composite ionomer emulsions, can solve the problems that ionomer emulsions are rarely reported, and achieve enhanced water resistance and performance Stable and good compatibility

Inactive Publication Date: 2008-10-08
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It is a relatively new work to make ionomers into stable emulsions. In recent years, there have also been reports on the work of making polyurethane-acrylate (PUA) ionomers, but there are few reports on directly making ionomer emulsions.

Method used

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  • Synthetic method of organosilicon polyurethane-acrylic ester ternary composite ionomer emulsion
  • Synthetic method of organosilicon polyurethane-acrylic ester ternary composite ionomer emulsion
  • Synthetic method of organosilicon polyurethane-acrylic ester ternary composite ionomer emulsion

Examples

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Effect test

Embodiment 1

[0026] Below is the example of silicone-polyurethane-acrylate ionomer emulsion prepared by the present invention, which has the following process and steps:

[0027] (1) Synthesis of silicone polyurethane prepolymer

[0028] Mix 90ml of methyl ethyl ketone solvent with 0.1mol of toluene diisocyanate (TDI) and add it to a three-necked flask protected by nitrogen, and drop three drops of catalyst dibutyltin dilaurate (DBT), raise the temperature to 60°C, and slowly drop Add hydroxyl-terminated polydimethylsiloxane, the content of hydroxyl-terminated polydimethylsiloxane accounted for 22% by mass of toluene diisocyanate, drop it in about 1.5h, and continue to react for 1.5 hours after the dropwise addition. Then polyisopropylene glycol (PPG1000) was added dropwise, the molar ratio of toluene diisocyanate (TDI) to polyisopropylene glycol was 1:1, the drop was completed in about 1.5h, and the reaction was continued for 1.5 hours after the dropwise addition.

[0029] (2) Synthesis ...

Embodiment 2

[0034] The synthesis method of the silicone-polyurethane-acrylate ternary composite ionomer emulsion of this embodiment is basically the same as that of Example 1, except that the mass percentage of cationic silicone polyurethane prepolymer (PU) is shown in Table 1. The impact of different cationic silicone polyurethane prepolymer (PU) mass percentages on the properties of the copolymer emulsion is listed. It can be seen from the table that the color of the emulsion becomes lighter with the increase of the PU content, and the amount of gel in the copolymerization reaction decreases. Copolymer emulsions are also more stable. Because PU prepolymer contains a large number of ionic bonds and contains hydrophilic and lipophilic groups, it can play a good emulsifying effect on emulsion polymerization. Therefore, the increase of PU content is helpful to the emulsion polymerization reaction, so the synthesized emulsion is more stable and the amount of gel is reduced, which plays the r...

Embodiment 3

[0041] The synthetic method of the organosilicon-polyurethane-acrylate ternary composite ionomer emulsion of the present embodiment is basically the same as that of Example 1, except that the mass percentage of organosilicon is listed in Table 3. The effect of changes on the mechanical properties of the coating film. It can be seen from the table that the mechanical properties of the coating film have been greatly improved. The hardness of the coating film can reach 2H when the organic silicon content is less than 52%, the adhesion can reach zero grade, and the impact resistance strength is all qualified. Analysis of the water resistance data of the coating film shows that the water resistance of the coating film has been greatly improved through the ionic bonding between acrylate and polyurethane. At the same time, with the increase of the silicone content, the water resistance of the coating film has also been enhanced.

[0042] Table 4 lists the effects of changes in the ...

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Abstract

The invention relates to a synthesis method of silicone-polyurethane-acrylate ternary composite ionomer emulsion as follows: first, hydroxy-terminated poly-dimethylsiloxane, N-methyl-diethanolamine, toluene diisocyanate, polypropylene glycol and others are used to prepare water-based silicone modified polyurethane; under the condition that the silicone modified polyurethane serves as emulsifier, the silicone modified polyurethane is polymerized and reacted with acrylic monomer to prepare stable silicone-polyurethane-acrylate ionomer emulsion. The silicone-polyurethane-acrylate ionomer emulsion is dried to obtain the silicone-polyurethane-acrylate coating. The synthesis method of the invention has simple process and low cost. The prepared ternary composite ionomer product combines the outstanding performances of the three components and can be applied to automobiles, household appliances, metal tools, buildings, textiles, paints and many other fields.

Description

technical field [0001] The invention relates to a method for synthesizing an organosilicon-polyurethane-acrylate ternary composite ionomer emulsion, and belongs to the technical field of polymer chemical synthesis. Background technique [0002] Silicone is a polymer in which silicon and oxygen atoms are alternately combined to form a siloxane chain inorganic skeleton, and organic groups such as methyl groups are connected to silicon atoms. The bond energy of siloxane bonds is much greater than that of carbon-carbon bonds, which is an important reason for the thermal stability and weather resistance of siloxane. Due to its unique chemical structure, polysiloxane has a series of excellent properties, such as excellent high and low temperature resistance, excellent insulation and chemical stability, hydrophobicity and moisture resistance, physiological inertness and biocompatibility. Since the industrial application in the 1940s, it has been extensively researched and applied....

Claims

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Application Information

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IPC IPC(8): C08G81/02C08G18/83C08G18/40C08G18/61C08F20/10C08F2/22
Inventor 张剑秋俎建华黄勤丁宏博王捷
Owner SHANGHAI UNIV
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