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Antibacterial and mildew-proof paint

An antibacterial, mildew proof and paint technology, applied in the field of paint, can solve the problems of poor antibacterial effect, fracture, reduced molecular weight and purity, etc., and achieves the effects of low output of acid-base wastewater, simple preparation process and high degree of deacetylation

Inactive Publication Date: 2017-01-04
瑞安市智造科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The deacetylation rate of chitosan prepared by this method is high, but because a large amount of concentrated alkali is used in the preparation of chitosan, the molecular chain of chitosan is broken in large quantities, reducing its molecular weight and purity, and the antibacterial effect is not good.

Method used

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  • Antibacterial and mildew-proof paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Decalcification: After crushing 10g insect carapace, it is immersed in 200g diluted acid with a mass concentration of 10% at 50℃ for 4 hours, filtered, and the filter cake is washed 3-5 times and dried to obtain 7.2g decalcification Product A;

[0035] (2) Deproteinization: Put 7.2g decalcification product A, 0.09g trypsin, 0.09g papain, 0.18g alkaline lipase and 144g water in a three-necked flask, control the pH of the reaction solution to 7.5, and stir at 40°C After 3 hours of hydrolysis, filter, take the filter cake and wash and dry to obtain 4.3 g of deproteinized product B;

[0036] (3) Purification: Dissolve 4.3g of deproteinized product B, 28g of caproic acid, 22g of oxalic acid, 14g of pyridine and 0.43g of NaCl, stir and dissolve at 60°C for 3 hours, filter, and dry the filtrate under reduced pressure to remove the solvent. After washing with water to remove NaCl, and drying to obtain 3.2 g of chitin, the HPLC purity was 92.3%, the recovery rate was 29.54%, and...

Embodiment 2

[0042] (1) Decalcification: After crushing 10g insect carapace, it is immersed in 250g dilute acid with a mass concentration of 15% at 30℃ for 6 hours, filtered, and the filter cake is washed 3-5 times and dried to obtain 7.8g decalcification Product A;

[0043] (2) Deproteinization: Put 7.8g decalcification product A, 0.12g trypsin, 0.12g papain, 0.24g alkaline lipase and 78g water in a three-necked flask, control the pH of the reaction solution to 8, and stir at 50°C After 2.5 hours of hydrolysis, filter, take the filter cake and wash and dry to obtain 5.1 g of deproteinized product B;

[0044] (3) Purification: 5.1g deproteinized product B, 40g caproic acid, 32g oxalic acid, 20g pyridine and 1g MgSO 4 After stirring and dissolving at 70°C for 2 hours, filter, the filtrate was dried under reduced pressure to remove the solvent, and then washed with water to remove MgSO 4 , Dried to obtain 3.8g chitin, HPLC purity is 93.8%, recovery rate is 35.6%, ash content is 0.78%.

[0045] (4)...

Embodiment 3

[0049] (1) Decalcification: After crushing 10g insect carapace, it is immersed in 300g dilute acid with a mass concentration of 20% at 40℃ for 5 hours, filtered, and the filter cake is washed 3-5 times and dried to obtain 6.9g decalcification Product A;

[0050] (2) Deproteinization: Put 6.9g decalcification product A, 0.14g trypsin, 0.14g papain, 0.28g alkaline lipase and water in a three-necked flask, control the pH of the reaction solution to 8.5, and stir and hydrolyze at 55℃ After 2 hours, filter, take the filter cake, wash and dry to obtain 4.6 g of deproteinized product B;

[0051] (3) Purification: 4.6g deproteinized product B, 40g caproic acid, 32g oxalic acid, 20g pyridine and 1.4g Na 2 SO 4 After stirring and dissolving at 80°C for 1 hour, filter, the filtrate is dried under reduced pressure to remove the solvent, and then washed with water to remove Na 2 SO 4 , Dried to obtain 3.5g chitin, HPLC purity is 93.1%, recovery rate is 32.6%, ash content is 0.72%.

[0052] (4) D...

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Abstract

The invention provides an antibacterial and mildew-proof paint. The antibacterial and mildew-proof paint comprises the following components in parts by weight: 400-500 parts of water, 3-5 parts of a dispersing agent, 1-3 parts of a wetting agent, 3-5 parts of a defoaming agent, 100-130 parts of titanium dioxide, 200-250 parts of acrylic emulsion, 10-20 parts of glycerinum, 5-8 parts of a preservative and 15-20 parts of an antibacterial agent, wherein the antibacterial agent is montmorillonite loaded with chitosan. The antibacterial and mildew-proof paint provided by the invention adopts the montmorillonite loaded with the chitosan, and has the advantages of safety, no toxicity and good biocompatibility.

Description

Technical field [0001] The invention belongs to the technical field of coatings, and specifically relates to an antibacterial and mildew resistant coating. Background technique [0002] As human beings pay more attention to their own health, the living environment they live with day and night has also attracted more and more attention. Keeping the environment pollution-free is a practical and feasible way to prevent bacteria and viruses from infecting humans. Using antibacterial materials is the simplest and most effective way to achieve pollution-free environments. Antibacterial coatings can be directly applied to various material manufacturers, and they have attracted much attention because of their ease of use. The development of antibacterial coatings is one of the development directions of the coating industry. Infectious antibacterial and antifungal agents, such as formaldehyde, phenol, sodium pentachlorophenate, heavy metal salts, etc., have been banned from being used in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D5/14C08B37/08A01N25/08A01N43/16A01P1/00A01P3/00
CPCA01N25/08A01N43/16C08B37/003C08K3/22C08K3/346C08K5/053C08K9/12C08K13/06C08K2003/2241C09D5/14C09D133/00
Inventor 黄嘉诚
Owner 瑞安市智造科技有限公司
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