Flame-retardant polyurethane adhesive and preparation method thereof

A polyurethane adhesive and flame retardant technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve a large number of toxic fog, combustion and other problems, and achieve good mechanical properties and flame retardant properties.

Pending Publication Date: 2021-09-28
安徽大松树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, polyurethane without flame retardant treatment is combustible, and it will burn and produce a large amount of toxic fog in case of fire. Therefore, in order to make polyurethane adhesives widely used, it is necessary to develop polyurethane adhesives with excellent flame retardant properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of preparation method of flame-retardant polyurethane adhesive that the present invention proposes, comprises the following steps:

[0021] S1. Add oligomeric octaaminophenylsilsesquioxane to ethanol solution, heat up to 65°C, add sulfamic acid, stir for 2 hours, then add cyanuric acid, stir for 3 hours, stop stirring, cool to room temperature and pump Filtration, washing, and drying to obtain a flame retardant; wherein, the weight ratio of oligomeric octaaminophenylsilsesquioxane, sulfamic acid, and cyanuric acid is 100:9:11;

[0022] S2, the polydiethylene glycol adipate diol (number average molecular weight is 3000) after dehydration treatment is added in the reaction vessel, then add toluene diisocyanate, hexamethylene diisocyanate and catalyst, heat up React at 70°C for 30 minutes, then add flame retardant, keep warm for 30 minutes, then add 1,4-butanediol, and add ethyl acetate to adjust the solid content of the system to 37%, keep warm for 60 minutes, then...

Embodiment 2

[0025] A kind of preparation method of flame-retardant polyurethane adhesive that the present invention proposes, comprises the following steps:

[0026] S1. Add oligomeric octaaminophenylsilsesquioxane to ethanol solution, heat up to 65°C, add sulfamic acid, stir for 3 hours, then add cyanuric acid, stir for 3 hours, stop stirring, cool to room temperature and pump filter, wash, and dry to obtain a flame retardant; wherein, the weight ratio of oligomeric octaaminophenylsilsesquioxane, sulfamic acid, and cyanuric acid is 100:10:12;

[0027] S2, the polydiethylene glycol adipate diol (number average molecular weight is 3000) after dehydration treatment is added in the reaction vessel, then add toluene diisocyanate, hexamethylene diisocyanate and catalyst, heat up React at 70°C for 35 minutes, then add flame retardant, keep warm for 35 minutes, then add 1,4-butanediol, and add ethyl acetate to adjust the solid content of the system to 38%, keep warm for 70 minutes, then cool dow...

Embodiment 3

[0030] A kind of preparation method of flame-retardant polyurethane adhesive that the present invention proposes, comprises the following steps:

[0031] S1. Add oligomeric octaaminophenylsilsesquioxane to ethanol solution, heat up to 70°C, add sulfamic acid, stir for 2.5 hours, then add cyanuric acid, stir for 2.5 hours, stop stirring, and cool to Suction filtration at room temperature, washing, and drying to obtain a flame retardant; wherein, the weight ratio of oligomeric octaaminophenylsilsesquioxane, sulfamic acid, and cyanuric acid is 100:11.5:15;

[0032] S2, the polydiethylene glycol adipate diol (number average molecular weight is 3000) after dehydration treatment is added in the reaction vessel, then add toluene diisocyanate, hexamethylene diisocyanate and catalyst, heat up React at 75°C for 35 minutes, then add flame retardant, keep warm for 40 minutes, then add 1,4-butanediol, and add ethyl acetate to adjust the solid content of the system to 40%, keep warm for 80 ...

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PUM

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Abstract

The invention discloses a flame-retardant polyurethane adhesive and a preparation method thereof, and relates to the technical field of polyurethane adhesives, wherein the preparation method comprises the following steps: adding oligomeric octa-aminophenyl silsesquioxane into an ethanol solution, heating, adding sulfamic acid, stirring for reaction, then adding cyanuric acid, stirring for reaction, carrying out suction filtration, washing and drying to obtain a flame retardant; adding poly(diethylene glycol adipate) glycol into a reaction container, then adding diisocyanate and a catalyst, carrying out a heating reaction, adding a flame retardant, carrying out a heat preservation reaction, then adding 1,4-butanediol and ethyl acetate, carrying out a heat preservation reaction, cooling, and adding triethylamine for neutralization so as to obtain a polyurethane prepolymer; and adding water into the polyurethane prepolymer, carrying out high-speed dispersion and emulsification, then carrying out reduced pressure distillation to remove the ethyl acetate, and thus obtaining the product. The flame retardant is added in the preparation process of the polyurethane prepolymer, the flame retardant participates in the reaction and is grafted to the polyurethane prepolymer, and the prepared adhesive has good mechanical property and flame retardant property.

Description

technical field [0001] The invention relates to the technical field of polyurethane adhesives, in particular to a flame-retardant polyurethane adhesive and a preparation method thereof. Background technique [0002] Polyurethane (PU) adhesive refers to the adhesive containing carbamate group (-NHCOO-) or isocyanate group (-NCO) in the molecular chain, which can be divided into two categories: polyisocyanate and polyurethane. Since the polyurethane adhesive contains these two groups and shows high activity and polarity, it is applied to many substrates, such as foam, plastic, wood, leather, fabric, paper, ceramics and other porous materials, as well as metal, glass, etc. , rubber, plastic and other materials with smooth surface, it has excellent adhesion to them. The hydrogen bond between the polyurethane and the material to be bonded will enhance the cohesion of the molecules, thus making the bond stronger. The diversity of polyurethane adhesives provides solutions to many...

Claims

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Application Information

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IPC IPC(8): C09J175/04C08G18/76C08G18/73C08G18/61C08G18/42C08G18/66C08G18/32
CPCC09J175/04C08G18/724C08G18/7614C08G18/73C08G18/61C08G18/425C08G18/664
Inventor 朱立芳
Owner 安徽大松树脂有限公司
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