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

A technology of polyurethane coating and application method, which is applied in the field of polyurethane coating preparation, and can solve the problems that the flame-retardant and wear-resistant strength of polyurethane needs to be improved.

Active Publication Date: 2021-04-13
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 preparation and application method of a flame-retardant wear-resistant low-VOC polyurethane coating. The preparation method comprises the following steps: adding polyester glycol, isocyanate and dibutyltin dilaurate into a reaction container, stirring at 75-90 DEG C for reaction to obtain a polyurethane prepolymer; adding a hydrophilic chain extender dimethylolpropionic acid, a nitrogen-phosphorus intumescent flame retardant and an acetone solvent into the polyurethane prepolymer, and stirring and reacting for 1-2 hours at the temperature of 70-90 DEG C; and adding triethylamine and water for emulsification for 20-60min, then, adding the substance A and epoxy-terminated polyether silicone oil, adjusting the pH to 6.5, performing stirring and reaction at 70-80 DEG C to obtain the flame-retardant wear-resistant low-VOC polyurethane coating. The obtained polyurethane film is obviously superior to the polyurethane film in the prior art in the aspects of flame combustion time, molten drop resistance and the like.

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 Applications(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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