Polyurethane-based transparent antifouling coating preparation method

An anti-fouling coating and polyurethane technology, applied in polyurea/polyurethane coatings, anti-fouling/underwater coatings, coatings, etc., can solve the problem of poor anti-fouling properties, poor durability, sacrificing material light transmission, and limiting anti-fouling surfaces, etc. problems, to achieve the effects of high non-toxicity, easy regulation of molecular weight and dosage, and improved durability

Inactive Publication Date: 2019-12-31
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above surface treatment methods can achieve the anti-fouling performance of the material surface, the preparation process is relatively cumbersome, and most of the systems use fluorine-containing substances or polymers, so the cost is high; and it is often

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of acetylated starch: Accurately weigh 5g of amylose and add it to a three-neck flask, add 10.79g of glacial acetic acid, stir for 5 minutes, add 9.45g of acetic anhydride, stir for 15min, add 0.18g of methanesulfonic acid catalyst, and heat at 75°C Under reaction 24h. After the reaction, the reactant was moved into a constant pressure funnel, and slowly added dropwise to the stirring deionized water for washing. After the dropwise addition, vacuum filtration was started and rinsed with deionized water to wash away the acetic acid until neutral. The finally obtained product was dried at 60° C. for 3 h to obtain the product.

[0027] Preparation of polyurethane-based transparent antifouling coating with 0.5wt% PDMS-OH: Accurately weigh 1.05mg polydimethylsiloxane (PDMS-OH) and 50mg hexamethylene diisocyanate trimer (HDIT) into In a 3 mL transparent glass bottle, add 0.5 mL methyl ethyl ketone to shake and dissolve it, and put it in an oven at 75°C for the fi...

Embodiment 2

[0029] Preparation of acetylated starch: Accurately weigh 5g of amylose and add it to a three-neck flask, add 10.79g of glacial acetic acid, stir for 5 minutes, add 9.45g of acetic anhydride, stir for 15min, add 0.18g of methanesulfonic acid catalyst, and heat at 75°C Under reaction 24h. After the reaction, the reactant was moved into a constant pressure funnel, and slowly added dropwise to the stirring deionized water for washing. After the dropwise addition, vacuum filtration was started and rinsed with deionized water to wash away the acetic acid until neutral. The finally obtained product was dried at 60° C. for 3 h to obtain the product.

[0030]Preparation of polyurethane-based transparent antifouling coating with 1wt% PDMS-OH: Accurately weigh 2.10mg of polydimethylsiloxane (PDMS-OH) and 50mg of hexamethylene diisocyanate trimer (HDIT) into 3mL In a transparent glass bottle, add 0.5mL methyl ethyl ketone to shake and dissolve it, and put it in an oven at 75°C for the f...

Embodiment 3

[0032] Preparation of acetylated starch: Accurately weigh 5g of amylose and add it to a three-neck flask, add 10.79g of glacial acetic acid, stir for 5 minutes, add 9.45g of acetic anhydride, stir for 15min, add 0.18g of methanesulfonic acid catalyst, and heat at 75°C Under reaction 24h. After the reaction, the reactant was moved into a constant pressure funnel, and slowly added dropwise to the stirring deionized water for washing. After the dropwise addition, vacuum filtration was started and rinsed with deionized water to wash away the acetic acid until neutral. The finally obtained product was dried at 60° C. for 3 h to obtain the product.

[0033] Preparation of polyurethane-based transparent antifouling coating of 2.5wt% PDMS-OH: Accurately weigh 5.25mg polydimethylsiloxane (PDMS-OH) and 50mg hexamethylene diisocyanate trimer (HDIT) into In a 3 mL transparent glass bottle, add 0.5 mL methyl ethyl ketone to shake and dissolve it, and put it in an oven at 75°C for the firs...

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PUM

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Abstract

The invention discloses a polyurethane-based transparent antifouling coating preparation method, which comprises: chemically modifying by using a natural polymer with hydroxyl as a raw material to prepare an acylated natural polymer compound; and carrying out a cross-linking reaction by using part of the residual hydroxyl groups of the acylation product as polyol, using a polyisocyanate compound as a cross-linking agent and using a small amount of hydroxyl-terminated polysiloxane as a functional component to prepare the polyurethane-based transparent antifouling coating with the light transmittance (T) of more than 95% and the thickness of 30-40 [mu]m. According to the invention, the prepared coating has advantages of high transparency, thermal stability, corrosion resistance, degradability, high surface hardness and other excellent performances; with the application of the coating in marking inks, paints and other liquid pollutants, the coating is extremely easily shrink, no mark leaves after repeated wiping, and the good antifouling property is achieved; the coating has the low sliding angle in most of test solutions; and the functional surface can be prepared on various surfacesof wood, metal, cotton fiber and the like, and has wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation of antifouling surface materials, in particular to a method for preparing a polyurethane-based transparent antifouling coating. Background technique [0002] "Smart" surfaces, such as self-cleaning windows, oil-resistant dining tables, stain-resistant car windshields and mirrors, graffiti-blocking walls, and other antifouling coatings that repel water and oil-borne contaminants, aid in cleaning and Beautify our world. At present, there are three main methods to construct the antifouling surface and endow the material with excellent amphiphobic properties: 1) forming a rough surface with micro-nano structure through various processing methods, and performing hydrophobic modification on the surface; 2) constructing a porous layer, Then, a liquid with low surface energy is poured into it to form a liquid-infused porous surface; 3) the surface is grafted and modified with a polymer with low surfa...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D5/16C08G18/64C08G18/61C08B31/04
CPCC08B31/04C08G18/4081C08G18/61C08G18/6484C09D5/1662C09D5/1675C09D175/04
Inventor 石淑先梁颖雷垒张东夏宇正周梦雨陈晓农
Owner BEIJING UNIV OF CHEM TECH
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