Zwitterionic compound, method of manufacturing the same, method of manufacturing network cross-linked polymer and coating

Abstract

This invention provides a biionic compound, its manufacturing method, a method for manufacturing a network crosslinked polymer, and a coating. The biionic compound has a specific structure that enhances the hydrophilicity of the coating, thereby providing better dust and dirt resistance. Furthermore, the network crosslinked polymer obtained by reacting the biionic compound with tetraethoxysilane via a sol-gel reaction further improves the hardness of the coating, thus enhancing its scratch resistance.

Claims

1. A diionic compound having the structure of the following formula (1): (1), in which R1, R2 and R3 independently represent methyl or ethyl, R4 represents sulfonate ion, phosphate ion or carbonate ion, and x represents an integer from 3 to 12, y represents an integer from 1 to 5, and z represents an integer from 1 to 5.

2. The diionic compound as claimed in claim 1, wherein the FTIR spectrum of the diionic compound exhibits characteristic peaks of hydroxyl (-OH) at wavenumbers of 3048 cm⁻¹ to 3673 cm⁻¹; characteristic peaks of quaternary ammonium salt cation functional groups (-C-N+) at wavenumbers of 1506 cm⁻¹ to 1709 cm⁻¹; characteristic peaks of siloxy groups (Si-O) at wavenumbers of 1061 cm⁻¹ to 1141 cm⁻¹; and characteristic peaks of thiooxy groups (-S=O) at wavenumbers of 940 cm⁻¹ to 1061 cm⁻¹ and 1142 cm⁻¹ to 1290 cm⁻¹.

3. A method for manufacturing a diionic compound, comprising: reacting a silane-containing functional group molecule with a diionic molecule to obtain the diionic compound, wherein the silane-containing functional group molecule has the structure of the following formula (2): (2), in formula (2), R1, R2 and R3 independently represent methyl or ethyl, and x represents an integer from 3 to 12, and the diionic molecule has the structure of the following formula (3): (3), in formula (3), R4 represents sulfonate ion, phosphate ion or carbonate ion, and y represents an integer from 1 to 5, z represents an integer from 1 to 5.

4. A method for manufacturing a diionic compound as claimed in claim 3, wherein the molar ratio of the silane-containing functional group molecule to the diionic molecule is 1:10 to 10:

1.

5. The method for producing a dual-ionic compound as described in claim 3, wherein the reaction temperature is from 25°C to 180°C and the reaction time is from 1 minute to 24 hours.

6. A method for manufacturing a network crosslinked polymer, comprising: providing a biionic compound as described in claim 1; and subjecting the biionic compound to a sol-gel reaction with tetraethoxysilane (TEOS) to obtain the network crosslinked polymer.

7. A method for manufacturing a network crosslinked polymer as claimed in claim 6, wherein the molar ratio of the diionic compound to the tetraethoxysilane is 1:10 to 10:

1.

8. A method for manufacturing a network crosslinked polymer as claimed in claim 6, wherein the reaction temperature of the sol-gel reaction is from 25°C to 180°C, and the reaction time of the sol-gel reaction is from 1 minute to 24 hours.

9. A coating comprising a network crosslinked polymer prepared by a method for manufacturing a network crosslinked polymer according to any one of claims 6 to 8, wherein the network crosslinked polymer comprises 0.1 wt% to 40 wt% based on a weight of 100 wt% of the coating.

10. The coating as claimed in claim 9, wherein the XPS spectral analysis of the coating shows that the coating contains nitrogen and sulfur.

11. The coating as described in claim 9, wherein the water contact angle of the coating is less than 65°.

12. The coating as described in claim 9, wherein the coating has an oil removal rate of at least 90%.

13. The coating as described in claim 9, wherein the bacterial adhesion rate of the coating is less than 98%.

14. The coating as described in claim 9, wherein the pencil hardness of the coating is H to F.

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