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Environment-friendly flame-retardant polyurethane emulsion and preparation method thereof

A polyurethane emulsion and flame-retardant technology, which is applied in the field of environment-friendly flame-retardant polyurethane emulsion and its preparation, can solve the problems such as few reports of environment-friendly flame-retardant polyurethane emulsion, and achieve easy control, good water resistance and mechanical properties, and convenient The effect of the operation

Active Publication Date: 2015-05-20
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the expansion of the application range of polyurethane materials, various industrial sectors, especially the furniture industry, paper industry and construction industry, have higher and higher requirements for flame retardancy, but there are few reports on the preparation of environmentally friendly flame-retardant polyurethane emulsions.

Method used

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  • Environment-friendly flame-retardant polyurethane emulsion and preparation method thereof
  • Environment-friendly flame-retardant polyurethane emulsion and preparation method thereof
  • Environment-friendly flame-retardant polyurethane emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. The formula of environmentally friendly flame-retardant polyurethane emulsion is as follows:

[0028]

[0029] 2. The preparation method is as follows:

[0030] The polycarbonate diol was dehydrated in a vacuum oven for 24 hours before the experiment. Add IPDI, PCDL and DOPO-HQ into a dry four-necked flask with a stirrer and a condenser, raise the temperature of the system to 80°C, add dibutyltin dilaurate dropwise, and react for 3 hours to obtain prepolymer I; prepolymer Ⅰ Cool down to 65°C, add 50g of acetone, dimethylolpropionic acid and 1,4-butanediol (dissolved in DMF), react at 70°C until the content of isocyanate no longer changes to obtain prepolymer II, then Add triethylamine dropwise to prepolymer II, neutralize at room temperature for 30 minutes, then add 336.5 g of deionized water at 0°C, stir to emulsify and obtain a white bluish emulsion, and distill under reduced pressure to remove the solvent to obtain the product . In the formula of the present...

Embodiment 2

[0032] 1. The formula of environmentally friendly flame-retardant polyurethane emulsion is as follows:

[0033]

[0034]

[0035] 2. The preparation method is as follows:

[0036] The preparation method of this example is the same as that of Example 1, except that -NCO / -OH (molar ratio) is 1.2:1, the neutralization rate is 100%, the solid content is 35%, and the flame retardant content is 4.8%. The environment-friendly flame-retardant polyurethane emulsion prepared by the invention is translucent and non-agglomerated emulsion. Pour the prepared water-based polyurethane emulsion onto a glass template, place it horizontally, dry it at room temperature to form a film, then put it in an oven and dry it at 50°C for 3-4 days, take it out and put it in a desiccator for later use. The performance measurement results are shown in Table 1.

Embodiment 3

[0038] 1. The formula of environmentally friendly flame-retardant polyurethane emulsion is as follows:

[0039]

[0040] 2. The preparation method is as follows:

[0041] The preparation method of this example is the same as that of Example 1, except that -NCO / -OH (molar ratio) is 1.3:1, the neutralization rate is 100%, the solid content is 35%, and the flame retardant content is 4.8%. The environment-friendly flame-retardant polyurethane emulsion prepared by the invention is translucent and non-agglomerated emulsion. Pour the prepared water-based polyurethane emulsion onto a glass template, place it horizontally, dry it at room temperature to form a film, then put it in an oven and dry it at 50°C for 3-4 days, take it out and put it in a desiccator for later use. The performance measurement results are shown in Table 1.

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Abstract

The invention discloses an environment-friendly flame-retardant polyurethane emulsion and a preparation method thereof, wherein the environment-friendly flame-retardant polyurethane emulsion is composed of the following raw materials in parts by weight: 26-38 parts of diisocyanate, 40-50 parts of macromolecular polyatomic alcohol, 2.5-10 parts of a flame retardant, 4-8 parts of an hydrophilic chain extender, 3-10 parts of a micromolecular chain extender, 1.5-9 parts of a neutralizer, and 0.5-1.5 parts of a catalyst. According to the invention, a chemical structure with a flame-retardant function is introduced onto a main chain of polyurethane, so aqueous polyurethane has the flame-retardant performance and the application range of the aqueous polyurethane is enlarged; and in addition, gradually increased requirements on the flame-retardant performance in the furniture industry and the construction industry are satisfied.

Description

1. Technical field [0001] The invention relates to a functional polyurethane and a preparation method thereof, in particular to an environment-friendly flame-retardant polyurethane emulsion and a preparation method thereof. 2. Background technology [0002] Polyurethane (referred to as PU) refers to a class of high molecular 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, its products include polyurethane foam, polyurethane elastomer, polyurethane coating, and polyurethane adhesive. There are two types of polyurethanes: solvent-based and water-soluble. Solvent-based polyurethanes contain a large amount of organic solvents, which are highly toxic when used and have certain impacts on the environment and the human body. With the continuous development of society, people's awareness of environmental protection is constantly increasin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/76C08G18/66C08G18/32C08G18/44C08G18/48C08G18/38C08G18/12
Inventor 史铁钧霍家佳
Owner HEFEI UNIV OF TECH
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