A kind of preparation method of hydrophobic flame-retardant polyurethane coating

A polyurethane coating, flame-retardant technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor water resistance, heat resistance, poor surface properties, poor mechanical properties, etc., to overcome poor water resistance and improve reaction performance , Improve the effect of comprehensive performance

Inactive Publication Date: 2017-04-19
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing a hydrophobic flame-retardant polyurethane coating, which can improve the utilization efficiency of natural renewable resources cyclodextrin and rosin, and convert the rigid ring Introducing the polyurethane-like structure into polyurethane overcomes the shortcomings of the existing water-based polyurethane coatings in water resistance, heat resistance and poor surface properties. The shortcomings of poor mechanical properties of flame-retardant polyurethane, and the use of organic silicon modification, further overcome the shortcomings of poor water resistance of water-based polyurethane coatings, obtain polyurethane coatings that can be stored stably, and improve the overall performance of polyurethane coatings

Method used

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  • A kind of preparation method of hydrophobic flame-retardant polyurethane coating
  • A kind of preparation method of hydrophobic flame-retardant polyurethane coating
  • A kind of preparation method of hydrophobic flame-retardant polyurethane coating

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Embodiment 1

[0029] This embodiment includes the following steps:

[0030] Step 1. Weigh the following raw materials in parts by weight: 80 parts of polyol, 20 parts of flame retardant, 40 parts of solvent, 5 parts of hydrophilic chain extender, 10 parts of neutralizing agent, 3 parts of catalyst, and 5 parts of organic silicon ; The polyol composition is formed by mixing biomass-based polyols and polymer polyols, the mass content of biomass-based polyols in the polyol composition is 12.5%, and the balance is polymer polyols; The biomass-based polyol is hydroxypropyl cyclodextrin, the polymer polyol is polyethylene glycol; the solvent is acetone, the hydrophilic chain extender is dimethylol propionic acid, and the flame retardant The agent is (N,N-bis(2-hydroxyethyl)aminomethylene phosphonic acid diethyl ester), and the neutralizing agent is pentamethyldiethylenetriamine;

[0031] Step 2. Mix the polyol composition, flame retardant, solvent, hydrophilic chain extender and neutralizing age...

Embodiment 2

[0036] This embodiment is the same as Example 1, except that the polymer polyol described in step 1 is polypropylene glycol, polytetramethylene glycol, polytetrahydrofuran ether or polyethylene oxide, or polyethylene glycol, At least two of polypropylene glycol, polytetramethylene glycol, polytetrahydrofuran ether and polyethylene oxide; the hydrophilic chain extender is dihydroxy half ester or diaminobenzoic acid, or dimethylol propionic acid, At least two of dihydroxy half esters and diaminobenzoic acid; the flame retardant is two (4-hydroxyphenyl) phenyl phosphine oxide, tetrabromophthalic anhydride diol or dibromoneopentyl glycol, or ( At least one of N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester), bis(4-hydroxyphenyl)phenylphosphine oxide, tetrabromophthalic anhydride diol and dibromoneopentyl glycol Two kinds; the neutralizing agent is N,N-dimethylcyclohexylamine, triethylenediamine or triethylamine, or pentamethyldiethylenetriamine, N,N-dimethylcycl...

Embodiment 3

[0040] This embodiment includes the following steps:

[0041] Step 1. Weigh the following raw materials in parts by weight: 60 parts of polyol, 15 parts of flame retardant, 30 parts of solvent, 9 parts of hydrophilic chain extender, 5 parts of neutralizing agent, 2 parts of catalyst, and 30 parts of organic silicon ; The polyol composition is formed by mixing biomass-based polyols and polymer polyols, the mass content of biomass-based polyols in the polyol composition is 16.7%, and the balance is polymer polyols; The biomass-based polyol is hydroxyethyl cyclodextrin, and the polymer polyol is polyethylene glycol and polypropylene glycol (the mass ratio of polyethylene glycol and polypropylene glycol is 1:1); the solvent is acetone, and the The hydrophilic chain extender is dimethylol propionic acid and dihydroxy half ester (the mass ratio of dimethylol propionic acid and dihydroxy half ester is 2:1), and the flame retardant is (N,N-bis (2-hydroxyethyl)aminomethylenephosphonic...

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Abstract

The invention discloses a method for preparing a hydrophobic flame-retardant polyurethane coating. The method comprises the following steps: 1. weighing various raw materials; 2. mixing the raw materials evenly to obtain a mixture; The organic silicon continues to react to obtain a prepolymer; 4. Add water dropwise to emulsify, vacuumize to remove the solvent, and obtain a hydrophobic flame-retardant polyurethane coating. The invention can improve the utilization efficiency of cyclodextrin and rosin, a natural renewable resource, introduce a rigid ring structure into polyurethane, and overcome the shortcomings of poor water resistance, heat resistance and surface properties of existing water-based polyurethane coatings. The flame retardant segment is introduced into the polyurethane skeleton structure to synthesize intrinsic flame retardant polyurethane coatings, which overcomes the shortcomings of poor mechanical properties of additive flame retardant polyurethanes, and uses organic silicon modification to further overcome the shortcomings of poor water resistance of waterborne polyurethane coatings, and obtains Stable storage of polyurethane coatings, improve the comprehensive performance of polyurethane coatings.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a method for preparing a hydrophobic flame-retardant polyurethane coating. Background technique [0002] Polyurethane is widely used in the fields of paper making, architectural coatings, adhesives, inks and leather. Most of the polyurethane materials currently used are flammable materials. In today's frequent fires, the development of flame-retardant polyurethane materials has become a hot spot of the times. Although the method of physically adding flame retardants can impart certain flame retardant properties to the material, the compatibility between the flame retardant and the polymer is poor, and it is easy to migrate or precipitate on the surface of the material, destroying the mechanical properties of the material. Therefore, in the structure of synthetic polyurethane materials The introduction of flame retardant components into the framework to endo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D175/06C08G18/48C08G18/66C08G18/12C08G18/42
Inventor 贺新福
Owner XIAN UNIV OF SCI & TECH
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