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Flame-retardant polyurethane water dispersion and its preparing method

A water-based dispersion and polyurethane technology, which is applied in the field of dispersion and its preparation, can solve problems such as flame-retardant polyurethane water-based dispersions that have not yet been discovered, and achieve the effect of avoiding impact

Inactive Publication Date: 2007-09-05
鳄鱼制漆(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In further searches, no literature reports identical or similar to the subject of the present invention "flame-retardant polyurethane aqueous dispersion and its preparation method" have been found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] raw material

[0030] In the reaction kettle equipped with a stirring blade, a thermometer and a condenser, add toluene diisocyanate, phosphorus antimony chlorine tribasic phosphate polyether glycol with a hydroxyl value of 50mgKOH / g, dimethylol propionic acid, and heat up to 60°C, heat preservation reaction for 0.5 hours, then raise the temperature to 75°C and react until the -NCO content reaches the specified value. Lower the temperature to 30-60°C, add triethylamine for neutralization, and obtain an anionic polyurethane prepolymer terminated by -NCO groups. The above prepolymer is emulsified with deionized water in high-speed emulsification equipment, and then added with ethylenediamine to stir and react for 20 to 30 minutes to obtain an anionic polyurethane aqueous dispersion with flame retardant function. In the formula of the present invention, the NCO / OH (molar ratio) is 1.2, the mass content of -COOH is 1.5%, and the neutralization rate is 85%. The fl...

Embodiment 2

[0032] raw material

[0033]In a reaction kettle equipped with a stirring blade, a thermometer and a condenser, add isophorone diisocyanate, phosphate polyether diol, dibromoneopentyl glycol, tartaric acid, raise the temperature to 60°C, and keep it warm for 0.5 hours , and then heated to 80 ° C to react until the -NCO content reached the specified value. Lower the temperature to 30-40°C, add NaOH for neutralization, and obtain an anionic polyurethane prepolymer terminated by -NCO groups. The above prepolymer is emulsified with deionized water in high-speed emulsification equipment, and hexamethylenediamine is added to stir and react for 20 to 30 minutes to obtain an anionic polyurethane aqueous dispersion with flame retardant function. In the formula of the present invention, the NCO / OH (molar ratio) is 3.0, the mass content of -COOH is 3.0%, and the neutralization rate is 70%. The flame-retardant polyurethane aqueous dispersion prepared by the invention is transpa...

Embodiment 3

[0035] Flame-retardant polyurethane aqueous dispersion formula three:

[0036] raw material

[0037] In the reaction kettle equipped with a stirring blade, a thermometer and a condenser, add hexamethylene diisocyanate, phosphorus antimony chloride tribasic phosphate polyether glycol, polyoxypropylene glycol, methyldiethanolamine, and heat up to 60°C, keep warm for 1 hour, then raise the temperature to 90°C to react until the -NCO content reaches the specified value, and then add butanediol to extend the chain. Lower the temperature to 30-40°C, add acetic acid for neutralization, and obtain a cationic flame-retardant polyurethane prepolymer. The above prepolymer is emulsified with deionized water in high-speed emulsification equipment to obtain cationic polyurethane aqueous dispersion with flame retardant function. In the formula of the present invention, the NCO / OH (molar ratio) is 2.0, the mass content of -COOH is 2.0%, and the neutralization rate is 100%. The fla...

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Abstract

The water dispersed flame retardant polyurethane consists of: diisocyanate 14-53wt%, flame retardant polyol 6-78 wt%, non-flame retardant polyol 0-52.5wt%, compound with active hydrogen and capable of forming hydrophilic radical 4-8 wt%, neutralizing agent 1.5-5wt%, and small molecular weight chain expander 1-18.5wt%. Its preparation process includes the steps of: pre-polymerizing diisocyanate, flame retardant polyol, non-flame retardant polyol and compound with active hydrogen and capable of forming hydrophilic radical to form pre-polymre I; neutralizing the hydrophilic radical with neutralizing agent to prepare -NCO radical ended pre-polymre II; dispersing pre-polymre II into deionized water and expanding chain with the small molecular weight chain expander to prepare the water dispersed flame retardant polyurethane. The present invention endows the product with internal flame retardant performance and expands the application range of water dispersed polyurethane.

Description

technical field [0001] The invention relates to a dispersion in the technical field of chemical engineering and a preparation method thereof, in particular to a flame-retardant polyurethane aqueous dispersion and a preparation method thereof. Background technique [0002] Polyurethane (referred to as PU) refers to a class of polymers containing carbamate (-NHCOO-) structure in the molecular chain. Due to the wide variety of raw materials for preparing polyurethane, various formulas, and a wide range of adjustments, it has the reputation of "cutting" polymers. Its products include polyurethane foam, polyurethane elastomer, polyurethane coating, and polyurethane adhesive. Polyurethane water-based dispersion is an important variety in a wide variety of polyurethane families. On the basis of retaining the excellent properties of polyurethane elastomers, it uses cheap water instead of organic solvents as the dispersion medium. It is safe to use, non-toxic, non-flammable, and non-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/32C08G18/72C08G18/10C08J3/02
Inventor 韩冬吕侠朱敏卢斯亮
Owner 鳄鱼制漆(上海)有限公司
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