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Preparation method for dihydric alcohol used for preparing polyurethane and application of dihydric alcohol

A diol and polyurethane technology, which is applied in the field of the preparation of recycled PET-based bromine-containing synergistic flame-retardant diols, can solve the problems of life and property safety hazards, and polyurethane is easy to burn, so as to increase the added value of products and increase flame retardancy Sex, technology mature and reliable effect

Inactive Publication Date: 2015-12-23
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyurethane foam without flame retardant treatment, because of its structure containing hydrocarbon groups, ether bonds, ester groups and other groups, makes polyurethane easy to burn, and releases toxic fumes such as hydrocyanic acid and carbon monoxide when burning, which is harmful to human health. Hazard to life and property

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1 A kind of preparation method for the dihydric alcohol of polyurethane

[0046] (1) Add 100g of recycled broken polyethylene terephthalate and 80g of glycol glycol into the reaction kettle, turn on the agitator, add 0.2g of zinc acetate catalyst, heat to 210°C, and keep it warm for 1h to obtain PET base glycol;

[0047] (2) Cool the temperature to 120°C, add 100g of tetrabromophthalic anhydride, and react for 10 minutes until the tetrabromophthalic anhydride dissolves;

[0048](3) Add 100g of propylene oxide, 1.0g of quaternary ammonium salt catalyst tetraethylammonium bromide, react for 3h, cool, and discharge to obtain the diol used for preparing polyurethane; it is a light yellow transparent liquid with an acid value of 0.9mgKOH / g, the viscosity is 3110mPa.s.

Embodiment 2

[0049] Embodiment 2 A kind of preparation method for the dibasic alcohol of polyurethane

[0050] (1) Add 100g of recovered crushed polyethylene terephthalate and 90g of diol 1,3-propanediol to the reaction kettle, turn on the agitator, add 0.3 zinc acetate catalyst, heat to 220°C, and keep it warm for 2h to obtain PET-based diols;

[0051] (2) Cool the temperature to 120-130°C, add 160g of tetrabromophthalic anhydride, and react for 20 minutes;

[0052] (3) Add 120g of epichlorohydrin and 2.2g of quaternary ammonium salt catalyst benzyltriethylammonium chloride, react for 3h, cool, and discharge to obtain diol for preparing polyurethane; it is light yellow transparent liquid, The acid value is 0.5mgKOH / g, and the viscosity is 4635mPa.s.

Embodiment 3

[0053] Embodiment 3 A kind of preparation method for the dihydric alcohol of polyurethane

[0054] The steps are the same as in Example 2, except that diethylene glycol is used instead of 1,3-propanediol; cetyltrimethylammonium bromide is used instead of benzyltriethylammonium chloride.

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PUM

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Abstract

The invention provides a preparation method for dihydric alcohol used for preparing polyurethane and application of the dihydric alcohol, and belongs to the technical field of high molecular materials, reactive flame retardants, energy conservation and protection, environmentally friendly technology and building thermal insulation materials. The dihydric alcohol used for preparing polyurethane is prepared by catalytic reaction among recycled polyethylene terephthalate, dihydric alcohol, alkylene oxide and tetrabromophthalic anhydride. The raw materials are low in cost and easy to get, the reaction is mild, the process is simple, the operation is easy, and industrial production is easy; the product is used for preparing flame retardant polyurethane foam materials.

Description

technical field [0001] The present invention relates to a preparation method and application of diols for preparing polyurethane, in particular to a method for preparing recycled PET-based bromine-containing synergistic flame-retardant diols for preparing flame-retardant polyurethane foams, which belongs to macromolecule Materials, reactive flame retardants, energy conservation and protection, environmentally friendly new technology and building insulation materials technology. Background technique [0002] Polyethylene terephthalate, referred to as PET, has excellent properties such as non-toxic, wear-resistant, heat-resistant, electrical insulation, chemical corrosion resistance and easy recycling, and is now widely used in synthetic fibers, films, medical equipment, civil blowers, etc. Plastics, food packaging materials, mineral water bottles and other fields, with the continuous improvement of social demand, its production and sales are also increasing. Since 2003, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91C08G18/42C08G18/48C08G18/76
Inventor 王志玲王刚崔玉郑鲁沂刘志连杨小风
Owner UNIV OF JINAN
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