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Modified acrylic resin emulsion and preparation method thereof

A technology of acrylic resin and acrylate, which is applied in the direction of coating, etc., can solve the problems of the environment, the hazards of the staff, the difficulty of increasing the grafting rate, and the unfavorable long-term development, so as to reduce air pollution, reduce oil floating, and improve The effect of grafting ratio

Pending Publication Date: 2021-07-13
SHENZHEN ANPIN SILICONE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reaction accelerator contains sulfur groups, has a special odor, and has a high boiling point. It is difficult to volatilize at room temperature. Inhalation will cause chest pain, headache, nausea, and pulmonary edema. It is harmful to the environment and staff, and is not conducive to long-term develop
[0007] Patent CN107383278A describes a method for preparing cationic polymer emulsion by soap-free emulsion polymerization. Under the condition of no initiator and normal temperature, pure cationic polymer emulsion is prepared by γ-ray radiation, but for ethylene with low reactivity Based on silicone oil, it is difficult to increase the grafting rate, and there are many limitations in application

Method used

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  • Modified acrylic resin emulsion and preparation method thereof
  • Modified acrylic resin emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Under the condition of nitrogen protection, mix 12.7g of allyl methacrylate, 100g of silicone oil containing a silicon hydrogen group at one end, 0.006g of polymerization inhibitor p-hydroxyanisole and 0.6g of 5000ppm Castel platinum catalyst, at 40°C After reacting for 10 hours, and then distilling under reduced pressure, polysiloxane with free radical polymerizable unsaturated groups was obtained, with a yield of 99%. After testing, its viscosity was 13 mPa.s, the number average molecular weight was 1130, and the vinyl content 2.3%, hydrogen content is 0;

[0065] The preparation method of the silicone oil containing a silicon hydrogen group at one end is:

[0066] Add 300g of octamethylcyclotetrasiloxane to a 1L three-necked flask, add 5.4g of concentrated sulfuric acid and 600g of toluene and slowly raise the temperature to 75°C, react for 3 hours, add 45g of potassium trimethylsiliconate and 270g of THF and raise the temperature to 80°C for 10 hours , cooled to ro...

Embodiment 2

[0068] Under the condition of nitrogen protection, mix 11.3g of allyl acrylate, 100g of silicone oil containing a silicon hydrogen group at one end, 0.006g of polymerization inhibitor p-hydroxyanisole and 0.7g of 5000ppm Castel platinum catalyst, and react at 40°C for 8h. Distilled under reduced pressure to obtain polysiloxane with unsaturated groups that can be radically polymerized, with a yield of 99%, a viscosity of 12 mPa.s, a number average molecular weight of 1112, and a vinyl content of 2.4%. , the hydrogen content is 0;

[0069] The preparation method of the silicone oil containing a silicon hydrogen group at one end is the same as in Example 1.

Embodiment 3

[0071] Under the condition of nitrogen protection, mix 4.7g of allyl methacrylate, 100g of silicone oil containing a silicon hydrogen group at one end, 0.25g of polymerization inhibitor p-hydroxyanisole and 0.27g of 5000ppm Castel platinum catalyst, and react at 60°C 8h, and then through vacuum distillation to obtain polysiloxane with free radical polymerizable unsaturated groups, the yield is 99%, its viscosity is 30mPa.s after testing, the number average molecular weight is 2830, the vinyl content 0.91%, hydrogen content is 0;

[0072] The preparation method of the silicone oil containing a silicon hydrogen group at one end is:

[0073]Add 300g of octamethylcyclotetrasiloxane to a 1L three-necked flask, add 0.9g of trifluoromethanesulfonic acid and 90g of toluene and slowly raise the temperature to 75°C, add 15g of potassium trimethylsiliconate and 45g of THF and raise the temperature to 80°C after 3 hours of reaction React at ℃ for 10 hours, cool to room temperature, add 1...

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Abstract

The invention discloses modified acrylic resin and a preparation method thereof. The modified acrylic resin is prepared by reacting the following raw materials in parts by weight: 25-45 parts of a (methyl) acrylate monomer, 0.5-3 parts of a monomer containing carboxyl, 0.5-2 parts of a hydrophilic functional monomer and 2-6 parts of polysiloxane with unsaturated groups capable of free radical polymerization. According to the invention, the modified acrylic resin is high in silicone oil grafting rate and good in emulsion stability, the phenomena of floating oil, gelation, phase separation and the like are avoided after the modified acrylic resin is placed for 6 months, and a cured paint film has excellent scratch resistance, weather resistance, aging resistance, hydrophobicity, heat resistance and the like.

Description

technical field [0001] The invention relates to a modified resin, especially for high-end 3C equipment such as mobile phones, computers, earphones, new energy vehicle parts and interior decoration, etc. , the effect is remarkable. [0002] technical background [0003] In recent years, the theory and technology of emulsion polymerization have been continuously developed and improved, and people's demand for environmentally friendly chemical products is increasing. Acrylic paint film has good adhesion, acid and alkali resistance, chemical corrosion resistance and other properties. However, the paint film formed by acrylate emulsion is still insufficient in water resistance; the shortcomings of becoming brittle at low temperature and viscous at high temperature also limit the use of acrylate emulsion. In order to solve this problem, the emulsion of various composite structures, such as polyorganosiloxane PDMS modified silicon-acrylic emulsion, is now a research hotspot in hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F220/18C08F220/14C08F220/06C08F220/58C08F222/38C08F222/02C08G77/38C09D151/08
CPCC08F290/068C08G77/38C09D151/085
Inventor 唐建振彭派潜吴光飞游正林陈巧站宾家辉
Owner SHENZHEN ANPIN SILICONE MATERIAL
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