Preparation method of flame-retardant aqueous polyurethane coating

A water-based polyurethane and flame-retardant technology, which is applied in polyurea/polyurethane coatings, fire-resistant coatings, coatings, etc., can solve secondary pollution and other problems, and achieve the effects of reduced smoke, good toughness, and high cost-effective flame retardancy

Active Publication Date: 2014-09-17
LESCENT CHINA ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phosphorus will cause eutrophication of water quality. Halogen-containing flame retardants have good flame retardant effect, but they are prone to secondary pollution during use and combustion, while silicon and boron are relatively environmentally friendly, and molybdenum is a good smoke suppression material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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-necked flask equipped with a stirring blade, a thermometer, and a condenser tube, add 0.1 g of dibutylboron trifluoromethanesulfonate, 25 g of phenylboronic acid, and 75 g of hexamethylene diisocyanate, and heat the mixture at 60° C. After reacting for 1 hour, add 0.2 g of tris(2,3-dibromo)propyl borate into a four-neck flask, the reaction temperature is 50°C, and the reaction time is 20 minutes to obtain 100.1 g of polyurethane prepolymer;

[0020] (2), add 1.1g of diphenyldihydroxysilane and 18g of acetone solvent to the polyurethane prepolymer, stir and react at 70°C for 1h, add 20g of triethylamine for neutralization reaction for 10min, add 160g of water for emulsification, and form A kind of waterborne polyurethane 294g of solid content 34.4%, transfers in the 500ml beaker for subsequent use;

[0021] (3), add 1-bis((trimethylsilyl) amino) boracycline 1g and 9g water in the 50ml beaker, then add N,N-dimethylaminopropylamine 0.15g in the beaker,...

example 2

[0024] (1), in a 500ml four-necked flask equipped with a stirring blade, a thermometer, and a condenser, add 0.4g of trimethylboron, 25g of phenylboronic acid, and 75g of hexamethylene diisocyanate, and react at 90°C for 3h, Then add 1.0 g of tris(2,3-dibromo)propyl borate into a four-necked flask, the reaction temperature is 80°C, and the reaction time is 60 minutes to obtain 101 g of polyurethane prepolymer;

[0025] (2) Add 2.2g of 4,4'-bis(dimethylhydroxysilyl)diphenyl ether and 28.3g of acetone to the polyurethane prepolymer, stir and react at 85°C for 3h, then add 30.3g of triethylamine Carry out neutralization reaction 40min, add water 170g and carry out emulsification, form a kind of waterborne polyurethane 325g of solid content 31.8%, transfer to the standby in the 500ml beaker;

[0026] (3), add 1-bis((trimethylsilyl)amino) boracycline 2g and 18g water in the 50ml beaker, then add triethylhexyl phosphoric acid 0.36g in the beaker, at a temperature of 50°C, Under the...

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PUM

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Abstract

The invention discloses a preparation method of a flame-retardant aqueous polyurethane coating. The method comprises the following steps: mixing borophenylic acid with hexamethylene diisocyanate in the presence of a catalyst, performing stirring reaction at 60-90 DEG C, adding tri(2,3-dibromo)propyl borate into a reaction system, and performing stirring reaction at 50-80 DEG C for 20-60 minutes to obtain a polyurethane prepolymer; adding a chain extender and acetone into the polyurethane prepolymer, performing stirring reaction at 70-85 DEG C for 1-3 hours, adding triethylamine, performing neutralization reaction for 10-40 minutes, adding water for emulsifying to form aqueous polyurethane, adding a dispersion solution A, 3,3'-diamino-4,4'-dihydroxy diphenyl sulfone, 1-sulfolane-3-ethoxycarbonyl-5-hydroxyl pyrazole and 1,4-bis(hydroxydimethylsilyl)benzene into aqueous polyurethane, and performing shear stirring for 40-80 minutes under the condition that the pH value is 7 to obtain the flame-retardant aqueous polyurethane coating. The obtained polyurethane coating is greatly improved in flame retardance and mechanical performance.

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 polyuretha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/12C09D5/18C08G18/32C08G18/16C08G18/10
Inventor 朱蕾
Owner LESCENT CHINA ADVANCED MATERIALS CO LTD
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