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Flame resistant aqueous polyurethane dispersion liquid

A polyurethane and dispersion technology, which is applied in the field of flame-retardant water-based polyurethane dispersion, can solve the problems of reduced flame retardancy, difficult processing, and difficult PU coating, etc., to reduce the content of flame retardants , The effect of saving the cost and time of the preparation process

Active Publication Date: 2012-11-28
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, most of the flame retardant water-based PU is prepared by mixing the flame retardant into the water-based PU, but after it is washed with water, the flame retardancy is usually reduced, so a high content of flame retardant needs to be added to achieve flame retardancy. However, when the amount of flame retardant added is too high, it will cause PU coating difficulties and difficult processing problems.

Method used

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  • Flame resistant aqueous polyurethane dispersion liquid
  • Flame resistant aqueous polyurethane dispersion liquid
  • Flame resistant aqueous polyurethane dispersion liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] With the dimethylol butyric acid (DMBA) of 10.36g, the phosphorus flame retardant of 20g, its structural formula is as follows:

[0035]

[0036] , 147.13g of polytetrahydrofuran (polytetramethylene-ether-glycol; PTMEG), 13.01g of acetone and 14.53g of N-methylpyrrolidone (NMP) are stirred evenly in a reaction tank with nitrogen, and when the above raw materials are in a homogeneous phase , 42.51 g of 2,4- and 2,6-toluene diisocyanate (TDI) in a mixing ratio of 80:20 (weight ratio) were added to the reaction tank, and after reacting for 5 hours at 55 ° C, the reaction tank The temperature was lowered to 50° C. and 7.07 g of triethylamine (TEA) was added to carry out a neutralization reaction for 20 minutes. 180 g of the neutralized and hydrophilic prepolymer was quickly added to 442.78 g of deionized water with a stirring rate of 2000 rpm for water dispersion, and then 1.69 g of ethylenediamine (EDA) was added for chain extension reaction. The chain extension reacti...

Embodiment 2

[0041] With the dimethylol butyric acid (DMBA) of 10.95g, the phosphorus flame retardant of 20g, its structural formula is as follows:

[0042]

[0043] , 117.36g of polytetrahydrofuran, 29.34g of polypropylene glycol (PPG), 13.76g of acetone and 13.83g of N-methylpyrrolidone are stirred uniformly in a reaction tank with nitrogen, and when the above-mentioned raw materials are in a homogeneous phase, 42.34 2,4-and 2,6-toluene diisocyanate in the mixing ratio of 80:20 (weight ratio) of g was added in the reaction tank, and after reacting for 5 hours at 55°C, the temperature of the reaction tank was lowered to 50°C and 7.47 g of triethylamine was added and a neutralization reaction was performed for 20 minutes. 180 g of the neutralized and hydrophilic prepolymer was quickly added to 338.16 g of deionized water with a stirring rate of 2000 rpm for water dispersion, and then 1.61 g of ethylenediamine was added for chain extension reaction. The chain extension reaction was cont...

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Abstract

The invention provides a flame resistant aqueous polyurethane dispersion liquid comprising 1 to 50 parts by weight of phosphorus flame retardant containing active hydrogen, 10 to 40 parts by weight of diisocyanate, 30 to 80 parts by weight of polyol and 1 to 15 parts by weight of compound containing the active hydrogen and forming hydrophilic functional group.

Description

technical field [0001] The present invention relates to a waterborne polyurethane, and in particular to a flame-retardant waterborne polyurethane dispersion. Background technique [0002] Polyurethane (PU) has excellent physical properties and variable composition, and is suitable for various purposes. It can be used as coatings, adhesives or sealants, etc. In the early days, solvent-based PU was mostly used, but it contains The volatilization of organic compounds will endanger human health and cause environmental pollution. Therefore, the current mainstream of development is water-based PU. [0003] However, generally PU has poor flame retardancy, and will burn when encountering a fire source or in a high-temperature environment. In order to solve this problem, the industry mixes flame retardants (such as halogen compounds, phosphorus compounds, inorganic powders, etc.) Mixed into water-based PU to achieve flame retardant effect. [0004] Japanese patent JP 2002235027 use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/65C08G18/64
Inventor 周永隆陈瑞鑫沈永清张义和
Owner IND TECH RES INST