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Organosilicon modified acrylic acid secondary dispersion and preparation method thereof

A secondary dispersion and silicone technology, applied in the field of modified resins, can solve the problems of environment, worker hazard, difficult to increase grafting rate, unfavorable long-term development, etc., to avoid air pollution and less oil floating. , the effect of improving the grafting rate

Pending Publication Date: 2021-06-11
惠州市安品新材料有限公司
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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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  • Organosilicon modified acrylic acid secondary dispersion and preparation method thereof
  • Organosilicon modified acrylic acid secondary dispersion and preparation method thereof
  • Organosilicon modified acrylic acid secondary dispersion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] 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, the organosilicon modified monomer was obtained with a yield of 99%. After testing, the viscosity was 13mPa.s, the number average molecular weight was 1130, the vinyl content was 2.3%, and the hydrogen content was 0. ;

[0066] The preparation method of the silicone oil containing a silicon hydrogen group at one end is:

[0067] 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 room temperature, 33g o...

Embodiment 2

[0069] 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. After vacuum distillation, the silicone modified monomer was obtained with a yield of 99%, a viscosity of 12 mPa.s, a number average molecular weight of 1112, a vinyl content of 2.4%, and a hydrogen content of 0;

[0070] The preparation method of the silicone oil containing a silicon hydrogen group at one end is the same as in Example 1.

Embodiment 3

[0072] 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 distilled under reduced pressure to obtain a silicone-modified monomer with a yield of 99%, a viscosity of 30mPa.s, a number average molecular weight of 2830, a vinyl content of 0.91%, and a hydrogen content of 0 ;

[0073] The preparation method of the silicone oil containing a silicon hydrogen group at one end is:

[0074]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 11g of dimethyl monochlorosilane dropwis...

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Abstract

The invention discloses an organic silicon modified acrylic acid secondary dispersion and a preparation method thereof. The dispersion is prepared from 15-25 parts by weight of a (methyl) acrylate monomer, 0.5-3 parts by weight of a monomer containing carboxyl, 8-15 parts by weight of hydroxyl (methyl) acrylate and 2-6 parts by weight of an organic silicon modified monomer. The organic silicon modified acrylic acid secondary dispersion is high in organic silicon grafting rate and good in emulsion stability, the phenomena of floating oil, gel, phase separation and the like are avoided after the dispersion 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): C08F283/12C08F220/18C08F220/14C08F220/06C08F220/20C08F222/02C08F2/06
CPCC08F283/124C08F2/06
Inventor 唐建振彭派潜吴光飞游正林陈巧站宾家辉
Owner 惠州市安品新材料有限公司
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