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

A water-based polyurethane and flame-retardant technology, which is applied in the field of preparation of water-based polyurethane coatings, can solve the problems of polyurethane performance, easy-to-corrosion equipment, and a large amount of smoke, and achieve fire-proof, smoke-proof, flame-retardant effects, smoke reduction, and small smoke Effect

Active Publication Date: 2016-05-18
广东顺德大地缘新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when polyurethane modified by brominated flame retardants burns, it produces a lot of smoke and is easy to corrode equipment, so it is subject to certain restrictions.
However, the flame-retardant water-based polyurethane currently on the market in my country is mainly of the blended compound type, and the flame-retardant effect is achieved by adding a large amount of flame retardant. This method is costly and has a great impact on the performance of polyurethane.
[0004] However, Duan Baorong and others applied for "a preparation method of flame-retardant polyurethane" by reacting polyhydroxy phosphorus compounds with hexamethylene diisocyanate, and the prepared polyurethane has good flame retardancy, but the smoke released by the combustion of the obtained material is relatively large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] (1) In a 500ml four-neck flask equipped with a stirring blade, a thermometer, and a condenser tube, add 0.24g of dibutyltin dilaurate, 10-(2,5-dihydroxyphenyl)-9,10-dihydro 40g of -9-oxa-10-phosphinophenanthrene-10-oxide and 20g of hexamethylene diisocyanate were stirred and mixed, stirred and reacted at 90°C for 1h, then 0.72g of cyclophosphamide was added, the reaction temperature was 70°C, stirred and reacted Time 30min, obtain polyurethane prepolymer 60.5g;

[0020] (2), add N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane 0.73g and butanone 9.08g to the polyurethane prepolymer, react at 60°C for 2h, add Triethylamine 12.1g carries out neutralization reaction 20min, adds water 130g and carries out emulsification, forms a kind of solid content and is the hydrophilic polyurethane emulsion 210g of 28.6%, transfers in the 500ml beaker for subsequent use;

[0021] (3), add 3g of manganese chloride, 27g of water and 0.45g of sodium lauryl sulfate into the 50ml beaker,...

example 2

[0024] (1) In a 500ml four-necked flask equipped with a stirring blade, a thermometer, and a condenser tube, add 0.42g of dibutyltin dilaurate, 10-(2,5-dihydroxyphenyl)-9,10-dihydro 40g of -9-oxa-10-phosphinophenanthrene-10-oxide was stirred and mixed with 20g of hexamethylene diisocyanate, stirred and reacted at 110°C for 1h, then 0.84g of histamine phosphate was added, the reaction temperature was 110°C, stirred Reaction time 60min, obtain polyurethane prepolymer 60.9g;

[0025] (2) Add 1.71 g of N-(β-aminoethyl)-γ-aminopropyl-methyl-trimethoxysilane and 14.6 g of butanone to the polyurethane prepolymer, react at 85° C. for 5 h, Add triethylamine 18.3g and carry out neutralization reaction 40min, add water 140g and carry out emulsification, form a kind of solid content and be 232g of the hydrophilic polyurethane emulsion of 26.3%, transfer to standby in the 500ml beaker;

[0026] (3), add 3g of manganese carbonate, 27g of water and 0.54g of sodium dodecylbenzenesulfonate to...

example 3

[0029] (1) Add 0.33g of dibutyltin dilaurate, 10-(2,5-dihydroxyphenyl)-9,10-dihydro 40g of -9-oxa-10-phosphinophenanthrene-10-oxide was stirred and mixed with 20g of hexamethylene diisocyanate, stirred and reacted at 100°C for 2.5h, then 0.78g of triethylenethiophosphoramide was added, and the reaction temperature 90°C, stirring reaction time 45min, to obtain 60.9g of polyurethane prepolymer;

[0030] (2), add 1.2g of 3-aminopropyltriethoxysilane and 11.9g of butanone solvent to the polyurethane prepolymer, react at 70°C for 3.5h, add 15.2g of triethylamine for neutralization reaction for 30min , add water 110g and carry out emulsification, form a kind of solid content and be 196g of aqueous polyurethane emulsion of 31.6%, transfer to standby in the 500ml beaker;

[0031] (3), in 50ml beaker, add 3g manganese chloride, 27g water and sodium polyacrylate 0.5g, under the condition that temperature is 30 ℃, pH is 7, ultrasonic pulverization 20min, obtains manganese chloride dispe...

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PUM

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Abstract

The invention discloses a method for preparing a flame-retardant waterborne polyurethane coating. Under the action of a dibutyltin dilaurate catalyst, 10-(2,5-dihydroxyphenyl)-9,10-dihydro-9-oxo Mix hetero-10-phosphophenanthrene-10-oxide with hexamethylene diisocyanate, react at 90~110°C for 1~4h, then add nitrogen and phosphorus compounds to the reaction system, reaction temperature 70~110°C, reaction time 30 ~60min to obtain polyurethane prepolymer; add chain extender and methyl ethyl ketone solvent to polyurethane prepolymer, react at 60~85℃ for 2? ~5h, add triethylamine for neutralization reaction for 20~40min, add water for emulsification to form a water-based polyurethane; mix manganese salt dispersion, 5-hydroxytryptophan, hexachlorocyclotrimeric phosphazene and γ-diethylene Add triaminopropylmethyl dimethoxysilane to polyurethane, and shear and stir for 30-80 minutes under the condition of pH 7 to obtain flame-retardant water-based polyurethane coating. The flame retardancy and mechanical properties of the obtained polyurethane are greatly improved.

Description

technical field [0001] The invention relates to a preparation method of water-based polyurethane paint, in particular to a preparation method of flame-retardant water-based polyurethane paint. Background technique [0002] Water-based polyurethane (also known as water-based polyurethane) is a polyurethane resin containing hydrophilic groups in the molecular chain of polyurethane, which has a strong affinity with water. It can be dispersed in water and formed by using a specific process. stable system. Waterborne polyurethane is mainly used in leather finishing, textile printing and dyeing, papermaking, architectural coatings, adhesives, cast steel coatings, etc. Almost all of the materials involved are flammable materials. If these materials are used without flame retardant treatment, they will inevitably become fire hazards Fire safety hazard. The flame retardancy of waterborne polyurethane is one of the important directions of functionalization of waterborne polyurethane...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D5/18C09D7/12C08G18/73C08G18/32C08G18/38
Inventor 段宝荣
Owner 广东顺德大地缘新材料有限公司
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