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An antibacterial coil coating with water resistance

A coil coating and performance technology, used in antifouling/underwater coatings, polyester coatings, coatings, etc., can solve problems such as changes in resin structure and coating performance, and achieve the effect of preventing changes in network structure characteristics

Active Publication Date: 2021-08-27
广东碧橙材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Coil topcoat, as the last coating on the surface of the coil, has high requirements. It requires the coating to have good decoration, protection, durability, construction and formability. Most of the coatings are polyester coatings, while Since the polyester resin in the polyester coating contains ester groups, it is easy to be hydrolyzed. The acid gas dissolved in water will catalyze the rapid hydrolysis and breakage of the ester bond of the resin, which will change the structure of the polyester resin and affect the prepared coating. In the prior art, the resin is directly cross-linked by a cross-linking agent to form a network cross-linked structure. Since the position of the cross-linking group on the resin is fixed, it is located on the carboxyl side or the hydroxyl side of the ester group, so Free small molecular substances are generated on the non-crosslinked side after the ester group is hydrolyzed, which in turn causes changes in the resin structure and changes in the properties of the prepared coatings

Method used

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  • An antibacterial coil coating with water resistance
  • An antibacterial coil coating with water resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation process of dislocation antibacterial enhancer is as follows:

[0031] Step 1: Add 1mol of p-thiaminophenol and 600mL of ethanol to the reaction kettle at the same time, stir and dissolve, then add 1.25mol of propynyl alcohol to it, stir and mix at room temperature for 50 minutes, then raise the temperature to 80°C, add 0.7mol of manganese dioxide to it, and then add 0.7mol of manganese dioxide to it at 2MPa Continuously feed air into the reactor under the pressure of 100°C. After the reaction is completed, the manganese dioxide is filtered off, and the obtained filtrate is subjected to rotary evaporation to remove the solvent and excess propynyl alcohol to obtain ammoniated allyl aldehyde phenol; ammoniated alkene Propionylphenol 1 Spectral analysis of HNMR, δ=5.74ppm and δ=7.32ppm are alkene groups 1 Absorption peak of H, δ=9.68ppm aldehyde group 1 H absorption peak;

[0032] Step 2: Add 1 mol of ammoniated allyl aldehyde phenol and 600 mL of carbon ...

Embodiment 2

[0035] The concrete preparation process of modified polyester resin is as follows:

[0036] In the first step, add 1 mol of adipic acid into 150mL of benzene and stir to dissolve, then raise the temperature to 75°C, add 100mL of bromine and 4.8mL of phosphorus trichloride dropwise, and heat the reaction at constant temperature until no red bromine vapor appears. Then slowly raise the temperature to 105°C, and then keep it warm for 3.5 hours, then carry out vacuum distillation and cooling crystallization on the product to obtain brominated adipic acid; brominated adipic acid 1 Spectrum analysis of HNMR, δ=4.23ppm and δ=12.22ppm are carboxyl groups 1 H absorption peak;

[0037] In the second step, 1mol of 4-aminoacetophenone, 50mL of acetic acid solution with a mass concentration of 35% and 160mL of ethanol are simultaneously added to the reaction kettle and stirred to dissolve, and then 2.4mol of propylene oxide is added dropwise at 5°C, and the mixture is controlled within 2 ...

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Abstract

The invention discloses an antibacterial coil coating with water resistance, which comprises the following components in parts by weight: 42-56 parts of modified polyester resin, 6-10 parts of amino resin, 13-21 parts of pigment, and precipitated barium sulfate 2-8 parts, dispersant 0.3-0.9 parts, leveling agent 0.1-0.7 parts, antioxidant 0.1-0.3 parts, acid catalyst 0.2-0.6 parts, solvent 20-28 parts. The modified polyester resin in the coating prepared by the present invention is prepared by reacting a saturated polyester resin with a dislocation antibacterial enhancer, and the terminal aldehyde group and the phenolic hydroxyl group in the dislocation antibacterial enhancer can respectively react with the styrene in the saturated polyester resin liquid. The ketone group reacts with the bromine element, so that one end of the dislocation antibacterial enhancer is grafted on the carboxyl side of the ester group in the polyester resin, and the other end is grafted on the hydroxyl side of the ester group to realize dislocation crosslinking. When the base is hydrolytically broken, the polymer can still be cross-linked through the dislocation antibacterial enhancer, and the polymer still maintains a network structure, so that its structural characteristics will not change.

Description

technical field [0001] The invention belongs to the field of paint preparation and relates to an antibacterial coil paint with water resistance. Background technique [0002] Coil topcoat, as the last coating on the surface of the coil, has high requirements. It requires the coating to have good decoration, protection, durability, construction and formability. Most of the coatings are polyester coatings, while Since the polyester resin in the polyester coating contains ester groups, it is easy to be hydrolyzed. The acid gas dissolved in water will catalyze the rapid hydrolysis and breakage of the ester bond of the resin, which will change the structure of the polyester resin and affect the prepared coating. In the prior art, the resin is directly cross-linked by a cross-linking agent to form a network cross-linked structure. Since the position of the cross-linking group on the resin is fixed, it is located on the carboxyl side or the hydroxyl side of the ester group, so Aft...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/02C09D161/20C09D5/14C08G63/91C08G63/682
CPCC08G63/6826C08G63/916C09D5/14C09D167/02C08L61/20
Inventor 吴春秋
Owner 广东碧橙材料科技有限公司
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