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A kind of flame-retardant vegetable oil-based water-based polyurethane coating and preparation method thereof

A water-based polyurethane and polyurethane coating technology, applied in polyurea/polyurethane coatings, fire-retardant coatings, epoxy resin coatings, etc., can solve the problem of lack of flame retardant properties, improve various properties, reduce costs, and high reactivity Effect

Active Publication Date: 2021-11-19
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At the same time, most polyurethane coatings do not have flame retardant properties, so introducing flame retardant components into the structural skeleton of synthetic polyurethane materials to endow materials with intrinsic flame retardant properties has become a research hotspot in recent years

Method used

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  • A kind of flame-retardant vegetable oil-based water-based polyurethane coating and preparation method thereof
  • A kind of flame-retardant vegetable oil-based water-based polyurethane coating and preparation method thereof
  • A kind of flame-retardant vegetable oil-based water-based polyurethane coating and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0055] The preparation method of the compound shown in formula I comprises the steps:

[0056] (1) FDCA (21.2g, 1.0eq) was dissolved in N,N-dimethylformamide (DMF, 80mL) and added to a round bottom flask with vigorous stirring, then allyl bromide (49.2g, 3.0eq ), K 2 CO 3(56.2 g, 3.0 equivalents) was added to the mixture, and the mixture was heated to 50° C. for 2 days. After the reaction, the mixture was rotary evaporated to remove unreacted allyl bromide, then the mixture was washed repeatedly with water and extracted with dichloromethane, the organic layer was collected, and dried with anhydrous sodium sulfate, separated by silica gel column to obtain yellow BAMF solid (27.2g , 85%).

[0057] (2) BAMF (11.8g, 1.0eq) and m-CPBA (21.5g, 2.5eq) were added to dichloromethane (80mL) and reacted at 40°C for 3 days, and the suspension obtained by filtration was extracted with dichloromethane , the collected organic phase was washed with aqueous sodium bisulfite, and then washe...

Embodiment 1

[0059] Mix 65 parts of vegetable oil polyols (hydroxyl value 170mgKOH / g, derived from cottonseed oil) with 60 parts of isophorone diisocyanate (IPDI) in 30 parts of acetone and add 2 parts of dibutyltin dilaurate, at 50 The reaction was carried out at ℃ for 2 hours to obtain a prepolymer mixed solution. Add 15 parts of epoxy resin I, 18 parts of flame retardant casein and 9 parts of hydrophilic chain extender dihydroxy half ester to the prepolymer mixture, and react at 50°C for 3 hours to obtain a polymer mixture. Cool the polymer mixed solution to 30°C, add 25 parts of neutralizing agent triethylamine to neutralize the polymer mixed solution, add 30 parts of deionized water for high-speed shear emulsification to form polyurethane emulsion. The acetone was distilled off the polyurethane emulsion under reduced pressure to obtain a flame-retardant vegetable oil-based waterborne polyurethane coating.

Embodiment 2

[0061] Mix 50 parts of vegetable oil polyol (hydroxyl value 160 mgKOH / g, derived from sesame oil) and 60 parts of toluene diisocyanate (TDI) in 35 parts of toluene, add 1 part of dibutyltin dilaurate, and react at 50 ° C for 2 hours to obtain the prepolymer mixture. Add 10 parts of epoxy resin I, 18 parts of flame retardant bis(4-hydroxyphenyl) phenylphosphine oxide and 5 parts of hydrophilic chain extender dimethylol propionic acid to the prepolymer mixture, at 50 °C React at high temperature for 3 hours to obtain a polymer mixture. Cool the polymer mixed solution to 30°C, add 20 parts of neutralizing agent triethanolamine to neutralize the polymer mixed solution, and add 20 parts of deionized water for high-speed shear emulsification to form a polyurethane emulsion. The toluene was distilled off the polyurethane emulsion under reduced pressure to obtain a flame-retardant vegetable oil-based waterborne polyurethane coating.

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Abstract

The invention discloses a flame-retardant vegetable oil-based water-based polyurethane coating and a preparation method thereof. Vegetable oil polyol, isocyanate, catalyst, organic solvent, epoxy resin, flame retardant, hydrophilic prepared from raw materials; wherein, the epoxy resin is a compound represented by formula I. The invention provides a method for preparing a flame-retardant vegetable oil-based water-based polyurethane coating. The preparation method is simple to operate, and the prepared polyurethane coating has excellent properties such as environmental protection, good water resistance, low product price, and good flame-retardant performance, which is beneficial to Industrial production.

Description

technical field [0001] The invention belongs to the technical field of polyurethane coatings, and in particular relates to a flame-retardant vegetable oil-based water-based polyurethane coating and a preparation method thereof. Background technique [0002] In recent years, with the enhancement of people's awareness of environmental protection and concern for their own health, coupled with strict requirements on the emission of volatile organic compounds (VOC) and the content of harmful solvents in environmental protection regulations, the use of polyurethane coatings containing solvents and organic fillers The application has been greatly restricted, which has prompted the development of polyurethane coatings in the direction of water-based, powdered and high-solid content. Among them, water-based polyurethane coatings use water as the dispersion medium, and are highly valued by the coatings industry because of their safety, non-toxicity, no solvent volatilization, environm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C09D5/18
CPCC09D175/14C09D5/18C08L2201/02C08L89/00C08K5/5397C08K5/521C08G18/36C08G18/755C08G18/246C08G18/10C08G18/0823C08G18/003C08G18/7621C08G18/7671C08G18/0852C08G18/3221C09D175/04C08L75/04C08G59/12C08G59/62C08G59/4028C08G18/348C08L89/005C08L63/00C08K5/523C08G18/12C08G18/32C08G18/34C08G18/67C08K5/0066C08L75/00C09D163/00
Inventor 郭凯方正何伟朱宁陶俊杰刘成扣陶惠新陈可泉
Owner NANJING TECH UNIV
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