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Preparation method of flame-retardant waterborne polyurethane paint

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: 2014-09-17
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
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specific Embodiment approach

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be further described below in conjunction with examples.

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 20 min, 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 40 min, 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 t...

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PUM

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Abstract

The invention discloses a preparation method of flame-retardant waterborne polyurethane paint. The preparation method comprises the steps of under action of a dibutyltin dilaurate catalyst, mixing 10-(2,5-dyhydroxyl phenyl)-9,10-dihydro-oxa-10-phosphaphenanthrene-10-oxide with hexamethylene diisocyanate, reacting for 1-4 hours at 90-110 DEG C, adding a nitrogen-phosphor compound into a reaction system to obtain polyurethane prepolymer, wherein a reaction temperature is 70-110 DEG C, and reaction time is 30-60 minutes; adding a chain extender and a butanone solvent into the polyurethane prepolymer, reacting for 2-5 hours at 60-85 DEG C, adding triethylamine to carry out neutralization reaction for 20-40 minutes, adding water to carry out emulsification to form waterborne polyurethane; adding manganese salt dispersion liquid, 5-hydroxytryptophane, hexachlorocyclotriphosphazene and gamma-diethylenetriamine propyl methyl dimethoxy silane into polyurethane, and shearing and stirring for 30-80 minutes under a condition with pH of 7 to obtain the flame-retardant waterborne polyurethane paint. Flame resistance and mechanical performances of the polyurethane are greatly improved.

Description

technical field [0001] The present invention relates to the preparation method of water-based polyurethane coating, particularly a kind of preparation method of flame-retardant water-based polyurethane coating. Background technique [0002] Waterborne polyurethane (also known as water-based polyurethane) is a kind of polyurethane resin containing hydrophilic group in the molecular chain of polyurethane, has very strong affinity with water, adopts specific technique to make it in water dispersed and formed a 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 ...

Claims

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Application Information

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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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