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Preparation and application method of flame-retardant and wear-resistant low-voc polyurethane coating

A polyurethane coating and wear-resistant technology, which is applied in polyurea/polyurethane coatings, fireproof coatings, coatings, etc., can solve the problems of polyurethane flame-retardant and wear-resistant strength to be improved, and achieve the advantages of combining and increasing the space distance Effect

Active Publication Date: 2021-10-15
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In summary, at present, polyurethane flame retardancy (especially droplet and smoke), abrasion resistance, and VOC still need to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] A method for preparing flame-retardant, wear-resistant, low-VOC polyurethane coatings, the steps are as follows:

[0032] (1) Add 46 parts of polycarbonate diol (molecular weight: 1000), 10.2 parts of 4,4-diphenylmethane diisocyanate, and 0.18 parts of dibutyltin dilaurate into the reaction vessel, and stir and react at 75°C for 1 hour. Obtain polyurethane prepolymer; Described part all refers to mass part, the same below.

[0033] (2) Add 0.7 parts of hydrophilic chain extender dimethylol propionic acid, 2.1 parts of nitrogen-phosphorus intumescent flame retardant, and 12.5 parts of acetone solvent to the polyurethane prepolymer, and stir and react for 1 hour at 70°C; Add 3.0 parts of triethylamine and 100 parts of water to emulsify for 20 minutes, then add 1 part of substance A and 0.2 parts of epoxy polyether silicone oil (Anhui Aiyota Silicone Oil Co., Ltd., IOTA-EO11000, the same below), and adjust to pH6.5 , stirred and reacted at 70°C for 1 hour to obtain a flam...

example 2

[0042] A method for preparing flame-retardant, wear-resistant, low-VOC polyurethane coatings, the steps are as follows:

[0043] (1) Add 46 parts of polycarbonate diol (molecular weight: 2000), 13.8 parts of isophorone diisocyanate and 0.45 parts of dibutyltin dilaurate into the reaction vessel, stir and react at 90°C for 2 hours to obtain a polyurethane prepolymer ;

[0044] (2) Add 3.2 parts of hydrophilic chain extender dimethylol propionic acid, 3.2 parts of nitrogen-phosphorus intumescent flame retardant, and 16.5 parts of acetone solvent to the polyurethane prepolymer, and stir and react for 2 hours at 90°C; Add 5.0 parts of triethylamine and 150 parts of water to emulsify for 60 minutes, then add 2 parts of substance A and 0.6 parts of epoxy-terminated polyether silicone oil, adjust the pH to 6.5, and stir for 2 hours at 80°C to obtain flame retardant, wear resistance, and low VOC polyurethane coatings;

[0045] The preparation method of the substance A is: adding 3 p...

example 3

[0053] A method for preparing flame-retardant, wear-resistant, low-VOC polyurethane coatings, the steps are as follows:

[0054] (1) Add 46 parts of polycarbonate diol (molecular weight: 1000), 12 parts of toluene diisocyanate, and 0.315 parts of dibutyltin dilaurate into the reaction vessel, and stir and react at 85°C for 1.5 hours to obtain a polyurethane prepolymer;

[0055] (2) Add 1.95 parts of hydrophilic chain extender dimethylol propionic acid, 2.65 parts of nitrogen-phosphorus intumescent flame retardant, and 14.5 parts of acetone solvent to the polyurethane prepolymer, and stir for 1.5 hours at 80°C; Then add 4 parts of triethylamine and 125 parts of water to emulsify for 40 minutes, then add 1.5 parts of substance A and 0.4 parts of epoxy-terminated polyether silicone oil, adjust the pH to 6.5, and stir and react at 75°C for 1-2 hours to obtain flame retardant and Abrasion-resistant, low-VOC polyurethane coatings;

[0056] The preparation method of the substance A ...

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Abstract

The invention discloses a method for preparing and applying a flame-retardant, wear-resistant and low-VOC polyurethane coating. Polyester diol, isocyanate, and dibutyltin dilaurate are added to a reaction vessel, and the polyurethane coating is stirred and reacted at 75-90°C to obtain a polyurethane coating. Polymer, add hydrophilic chain extender dimethylolpropionic acid, nitrogen phosphorus intumescent flame retardant, acetone solvent to the polyurethane prepolymer, stir and react at 70~90℃ for 1~2h; then add triethyl Emulsify with amine and water for 20~60min, then add substance A and epoxy-terminated polyether silicone oil, adjust the pH to 6.5, stir and react at 70~80°C to obtain a flame-retardant, wear-resistant and low-VOC polyurethane coating, and the obtained polyurethane film can be burned in a flame Aspects such as time, droplet resistance are obviously superior to due to prior art.

Description

technical field [0001] The invention relates to a preparation method of a polyurethane coating, in particular to a preparation method of a polyurethane coating with properties of flame retardancy, abrasion resistance and low VOC. The invention also relates to methods of application of the prepared polyurethane coatings. Background technique [0002] Polyurethane belongs to a class of organic polymer materials with carbon-carbon bonds as the basic structural units. Most of the raw materials used in the synthesis of polyurethane are flammable organic chemicals or polymer materials, so polyurethane is a flammable substance, which is accompanied by potential fire hazards during use. On the other hand, the burning of such polymers is accompanied by the release of smoke and toxic gases, and can produce molten droplets that can damage human skin or cause flames. [0003] As the existing technology, there are three main methods for flame retardant modification of polyurethane coat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D5/18C09D7/65C08G18/44C08G18/10C08G18/34C08G18/62C08G18/61C08G83/00C08G73/02
CPCC09D175/04C09D5/185C09D7/65C08G18/44C08G18/10C08G18/6291C08G83/008C08G73/0213C08L2205/05C08L2201/02C08G18/348C08G18/62C08G18/61C08L79/02
Inventor 段宝荣于涵尹浩宇唐志海翁永根王全杰王琦研张风浩张田田常天辰冯连享
Owner YANTAI UNIV
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