Organic silicon graft copolymer and its preparation method and application

A technology of graft copolymer and silicone, which is applied in the field of silicone graft copolymer and its preparation, can solve the problems of poor water solubility and poor durability of the coating, and achieve improved crosslinking degree, excellent hydrophilicity, and excellent composition Effect of Membrane Properties and Water Repellency

Active Publication Date: 2014-07-30
JIANGSU NUOFEI NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, what the present invention is to solve is the problem of poor water solubility and poor durability of organic silicon-containing ...

Method used

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  • Organic silicon graft copolymer and its preparation method and application
  • Organic silicon graft copolymer and its preparation method and application
  • Organic silicon graft copolymer and its preparation method and application

Examples

Experimental program
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Embodiment 1

[0033] This embodiment provides a kind of organosilicon graft copolymer, and its specific preparation method is:

[0034] S1. Add 50g of monomer to be polymerized A1, 10g of monomer to be polymerized A2, 35g of monomer to be polymerized A3 and 5g of monomer to be polymerized A4 in a 500ml four-necked flask, add 100g of dipropylene glycol monomethyl ether to dissolve the above monomer to be polymerized Body, add 2g initiator azobisisobutyronitrile;

[0035] Nitrogen was introduced to reduce the oxygen content in the four-necked flask to below 500ppm, and the temperature was raised to 80°C. After 18 hours of reaction, the monomer conversion rate was monitored by gas chromatography. When the monomer conversion rate reached 98%, the heating reaction was terminated.

[0036]A1 is mercapto-containing polydimethylsiloxane (XIAMETER OFS-2396), A2 is N,N-dimethylaminoethyl methacrylate, A3 is polyethylene glycol (EO10mol) monomethacrylate, A4 It is γ-(methacryloyloxy)propyltrimethoxys...

Embodiment 2

[0042] This embodiment provides a kind of organosilicon graft copolymer, and its specific preparation method is:

[0043] S1, add 50g monomer to be polymerized A1, 10g monomer to be polymerized A2, 35g monomer to be polymerized A3 and 5g monomer to be polymerized A4 in a 500ml four-necked flask, add 67g of dipropylene glycol and triglycerol in a mass ratio of The mixture of 1:1 dissolves the above-mentioned monomers to be polymerized, and adds 3g of initiator azobisisobutyronitrile;

[0044] Nitrogen was introduced to reduce the oxygen content in the four-neck flask to below 500ppm, and the temperature was raised to 25°C. After 18 hours of reaction, the monomer conversion rate was monitored by gas chromatography. When the monomer conversion rate reached 99%, the heating reaction was terminated.

[0045] A1 is acrylate-containing polydimethylsiloxane (XIAMETER OFS-4246), A2 is N,N-dimethylaminoethyl methacrylate, A3 is polyethylene glycol (EO10mol) monomethacrylate, A4 is γ-(m...

Embodiment 3

[0050] This embodiment provides a kind of organosilicon graft copolymer, and its specific preparation method is:

[0051] S1. Add 30g of monomers to be polymerized A1, 20g of monomers to be polymerized A2, 45g of monomers to be polymerized A3 and 5g of monomers to be polymerized A4 in a 500ml four-necked flask, add 100g of dipropylene glycol monomethyl ether to dissolve the above monomers to be polymerized Body, add 0.2g initiator azobisisobutyronitrile;

[0052] Nitrogen was introduced to reduce the oxygen content in the four-necked flask to below 500ppm, and the temperature was raised to 110°C. After 18 hours of reaction, the monomer conversion rate was monitored by gas chromatography. When the monomer conversion rate reached 98%, the heating reaction was terminated.

[0053] A1 is mercapto-containing polydimethylsiloxane (XIAMETER OFS-2397), A2 is N,N-dimethylaminoethyl methacrylate, A3 is polyethylene glycol (EO15mol) monomethacrylate, A4 It is γ-(methacryloyloxy)propyltr...

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Abstract

The invention relates to the field of chemical new materials, in particular relates to an organic silicon graft copolymer and its preparation method and application. A surface coating is made from the organic silicon graft copolymer, adapted carbon and silicon atoms can effectively reduce the surface energy of the surface coating so as to provide a large-angle rainwater static contact angle, so that the surface coating has the self-cleaning function. More importantly, in dry air, organic silicon chain segments in the organic silicon graft copolymer are spread on the surface of a substrate to play a water repellent effect, an acidified tertiary amine or quaternary ammonium salt makes the material surface positively charged for rejection of suspended particles in the atmosphere; in rainy weather, polyalkylene glycol driven by the surface energy spontaneously transfers to the material surface, attached contaminants are brought to the material surface during the process, and the contaminants are removed by rainwash. The self-cleaning function of material surface of the material surface can be realized by repeated alternating of the process.

Description

technical field [0001] The invention relates to the field of new chemical materials, in particular to an organosilicon graft copolymer, its preparation method and its application in surface coating. Background technique [0002] In the field of coatings, it is widely believed that hydrophobic coating films have self-cleaning properties, and many stain-resistant products have been developed on this basis, such as silicone-containing polymers. In addition to carbon atoms, the polymer containing silicone also contains a large number of silicon atoms with low surface energy, which can greatly reduce the surface energy of the material; when rain falls on the surface of the polymer coating containing silicone, the static The contact angle increases, making the rainwater form water droplets that are easy to roll off, so that the pollutants on the surface of the coating are taken away by the water droplets, realizing the self-cleaning function. [0003] However, the solubility of e...

Claims

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Application Information

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IPC IPC(8): C08F283/12C09D151/08
Inventor 邹玥李娜
Owner JIANGSU NUOFEI NEW MATERIAL TECH
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