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Preparation method of flame-retardant antibacterial water-based coating

A technology of water-based coatings and modifiers, applied in antifouling/underwater coatings, fireproof coatings, polyurea/polyurethane coatings, etc., can solve the problems of antibacterial not lasting, affecting the service life of coatings, and not disclosing the antibacterial effect, etc., to achieve Good antibacterial persistence, excellent flame retardant effect, and excellent mechanical properties

Inactive Publication Date: 2020-04-28
BESTEE MATERIAL (TSINGTAO) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN201910452632.4 discloses a nano-organic water-based coating and its preparation method. It mixes and grinds inorganic nano-materials, composite photocatalysts, PUA emulsions and antifungal agents to obtain nano-organic water-based coatings, which can not only improve the wear resistance of the workpiece surface And impact resistance, also has excellent antibacterial effect, but it does not disclose the antibacterial effect that can be achieved. In addition, its preparation process is only through mixing and grinding, and antibacterial ingredients such as antifungal agents are easy to migrate, and the antibacterial effect is not long-lasting
[0004] CN105017876A discloses an antibacterial flame-retardant coating, which uses styrene-acrylic emulsion and silica sol in combination to enhance the stability of the coating; in addition, the mixed use of natural antibacterial and inorganic antibacterial agents, inorganic antibacterial agents are silver calcium phosphate and silver phosphoric acid Zirconium mixture, natural antibacterial agent is plant alcohol extract, plants include petunias, bletilla striata, mint, lemon leaves and pomegranate peel, has excellent antibacterial effect, the sterilization rate of Chaetomium globosa and Aspergillus flavus reached 97% in 120h -100%, with the use of flame retardants, it can effectively play a flame retardant effect and improve safety, but adding a large amount of inorganic particles is easy to cause agglomeration, and the particle size is too large, which will affect the strength and toughness of the coating, and affect the service life of the coating

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 A kind of preparation method of flame-retardant and antibacterial water-based paint

[0031] 1. Preparation of film-forming substances:

[0032] 1) The polyether diol is vacuum dehydrated at -0.1MPa, 100°C to a water content below 1%, and then soaked in 40A molecular sieve for 8 hours for later use; under nitrogen atmosphere, add MDI and catalyst two to the reaction kettle Dibutyltin laurate, raise the temperature to 85°C and keep it warm for 5 hours to obtain a prepolymer;

[0033] The molar ratio of the MDI to the polyether diol is 1.05:1;

[0034] The add-on of described catalyzer is the 0.06mol% of polyether glycol;

[0035] 2) Add 5 times the weight of acetone to the prepolymer, disperse and stir at a high speed, raise the reaction temperature to 50°C, add chain extender ethylene glycol, continue stirring for 1 hour, and then remove the solvent to obtain self-emulsifying polymer Ether polyurethane;

[0036] The add-on of described ethylene glycol a...

Embodiment 2

[0067] Embodiment 2 A kind of preparation method of flame-retardant and antibacterial water-based paint

[0068] 1. Preparation of film-forming substances:

[0069] 1) The polyether diol is vacuum dehydrated at -0.1MPa, 100°C to a water content below 1%, and then soaked in 40A molecular sieve for 10h for later use; under nitrogen atmosphere, add MDI and catalyst two to the reaction kettle Dibutyltin laurate, raise the temperature to 85°C and keep it warm for 5 hours to obtain a prepolymer;

[0070] The molar ratio of the MDI to the polyether diol is 1.05:1;

[0071] The add-on of described catalyzer is the 0.09mol% of polyether glycol;

[0072] 2) Add 5 times the weight of acetone to the prepolymer, disperse and stir at a high speed, raise the reaction temperature to 50°C, add chain extender ethylene glycol, continue stirring for 1 hour, and then remove the solvent to obtain self-emulsifying polymer Ether polyurethane;

[0073] The add-on of described ethylene glycol accou...

Embodiment 3

[0104] Embodiment 3 A kind of preparation method of flame-retardant antibacterial water-based paint

[0105] 1. Preparation of film-forming substances:

[0106] 1) The polyether diol is vacuum dehydrated at -0.1MPa, 100°C to a water content below 1%, and then soaked with 40A molecular sieve for 15h for later use; under nitrogen atmosphere, add MDI and catalyst two to the reaction kettle Dibutyltin laurate, raise the temperature to 85°C and keep it warm for 6 hours to obtain a prepolymer;

[0107] The molar ratio of the MDI to the polyether diol is 1.09:1;

[0108] The add-on of described catalyst is 0.12mol% of polyether glycol;

[0109]2) Add 7 times the weight of acetone to the prepolymer, disperse and stir at a high speed, raise the reaction temperature to 50°C, add chain extender ethylene glycol, continue stirring for 1 hour, and then remove the solvent to obtain self-emulsifying polymer Ether polyurethane;

[0110] The add-on of described ethylene glycol accounts for ...

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Abstract

The invention provides a preparation method of flame-retardant antibacterial water-based coating. The content of a plant extract is 0.1-5%; and the plant extract is one or more of a wormwood extract,a Sarcandra glabra extract, a lavender extract, a valerian extract and a seaweed extract, or one or more of quercetin, salicylic acid, emodin, menthol, menthone, hyperoside, fumaric acid, linalool, caffeic acid, calcium alginate and sodium alginate, and slows the coating to have a plant natural antibacterial effect. A preparation process of the coating also comprises the following steps: preparinga film-forming substance, preparing color paste, preparing a diatomite porous material, preparing a functional modifier containing the plant extract, and preparing the water-based coating. Through the preparation process, the flame retardant property of the coating and the mechanical strength of a coating film are improved at the same time, and the application field of the coating is widened.

Description

technical field [0001] The invention belongs to the field of water-based paint, in particular to a method for preparing a flame-retardant and antibacterial water-based paint. Background technique [0002] With the development of various industries in the national economy, the coating industry has gradually developed from a very unobtrusive small industry to an indispensable important industry in various fields of the national economy. Nowadays, the use of coatings can be seen everywhere, such as on the surface of automobiles, home appliance casings, Home decoration, etc., especially wall paint and furniture paint in home decoration. Compared with traditional solvent-based coatings, water-based coatings are cheaper, safer to use, save resources and energy, and reduce environmental pollution and public hazards. Therefore, it has become the main direction of the current development of the coatings industry. [0003] CN201910452632.4 discloses a nano-organic water-based coating...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D133/14C09D5/14C09D5/18C09D7/62C08F283/00
CPCC08F283/006C08L2201/02C08L2205/035C09D5/14C09D5/18C09D133/24C09D175/08C09D7/62C09D7/70C08L33/24C08K9/12C08K9/02C08K7/26C08K5/0058C08K13/06C08L75/08
Inventor 黄效华刘宇黄效谦刘洁甄丽
Owner BESTEE MATERIAL (TSINGTAO) CO LTD
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