Flame-retardant polyurethane water dispersion and its preparing method

A water-based dispersion and polyurethane technology, 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 found, and achieve the effect of avoiding influence

Inactive Publication Date: 2006-03-22
鳄鱼制漆(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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Examples

Experimental program
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Example Embodiment

[0028] Example 1

[0029] Raw materials

[0030] In a reactor equipped with a stirring paddle, a thermometer and a condenser, add toluene diisocyanate, phosphorus antimony chloride tertiary phosphate polyether diol with a hydroxyl value of 50 mgKOH / g, dimethylol propionic acid, and heat to The temperature is kept at 60°C for 0.5 hours, and then the temperature is raised to 75°C to react until the -NCO content reaches the specified value. The temperature is reduced to 30-60°C, and triethylamine is added for neutralization to prepare an anionic polyurethane prepolymer terminated with -NCO groups. The above-mentioned prepolymer is emulsified with deionized water in a high-speed emulsification equipment, and ethylenediamine is added for stirring for 20-30 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...

Example Embodiment

[0031] Example 2

[0032] Raw materials

[0033]Add isophorone diisocyanate, phosphate ester polyether diol, dibromoneopentyl glycol, tartaric acid to a reactor equipped with stirring blade, thermometer and condenser, heat up to 60°C, and react with heat preservation for 0.5 hours , And then heated to 80 ℃ to react until the -NCO content reaches the specified value. The temperature is lowered to 30-40°C, and NaOH is added for neutralization to prepare an anionic polyurethane prepolymer terminated with -NCO groups. The above-mentioned prepolymer is emulsified with deionized water in a high-speed emulsification equipment, and hexamethylene diamine is added for stirring for 20-30 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 b...

Example Embodiment

[0034] Example 3

[0035] Raw materials

[0036] Add hexamethylene diisocyanate, phosphorous antimony chlorotribasic phosphate polyether diol, polyoxypropylene diol, and methyldiethanolamine into a reactor equipped with stirring blade, thermometer and condenser, and heat to The reaction was kept at 60°C for 1 hour, then the temperature was raised to 90°C to react until the -NCO content reached the specified value, and then butanediol was added for chain extension. The temperature is lowered to 30-40°C, and acetic acid is added for neutralization to obtain a cationic flame retardant polyurethane prepolymer. The above-mentioned prepolymer is emulsified with deionized water in a high-speed emulsification equipment to obtain a cationic water-based polyurethane 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 flame-retardant polyuretha...

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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 ¿CNCO 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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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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