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Halogen-free organophosphate fire retardant and its preparation method

A technology of organic phosphate and flame retardant, which is applied in the field of flame-retardant polyurethane foam, can solve problems such as toxic residues, and achieve the effect of environmental protection and cost reduction

Active Publication Date: 2013-10-23
常熟国和新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a reactive halogen-free organic phosphate flame retardant, which overcomes the above-mentioned deficiencies in the performance of phosphate esters, and solves the problem of introducing toxic residues in addition to the by-product hydrogen chloride

Method used

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  • Halogen-free organophosphate fire retardant and its preparation method
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  • Halogen-free organophosphate fire retardant and its preparation method

Examples

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Effect test

Embodiment 1

[0045] Embodiment 1: the preparation of organophosphate of the present invention

[0046] ① Add 153.5 grams (1 mole) of phosphorus oxychloride to the reaction device (mainly including reaction bottle, stirring device, dropping device, heating temperature control and gas absorption device), and then dropwise add 94 grams of pre-melted phenol (1 mole ), the total dropping time is about 1 hour. After the dropping is completed, react at 70-80°C for 2 hours. During this period, introduce the generated hydrogen chloride into the absorption device equipped with water until the concentration of hydrochloric acid no longer increases;

[0047] ② Slowly add 68.2 grams of ethylene glycol (1.1 moles) into the kettle, dropwise for 0.25 hours, control the temperature of the material at 80-90°C and continue the reaction for 2 hours, during which the generated hydrogen chloride is introduced into the absorption device filled with water , until the concentration of hydrochloric acid no longer i...

Embodiment 2

[0050] Embodiment 2: the preparation of organophosphate of the present invention

[0051]① Add 153.5 grams (1 mole) of phosphorus oxychloride to the reaction device (mainly including reaction bottle, stirring device, dropping device, heating and temperature control temperature gas absorption device), and dropwise add 108.1 grams of benzyl alcohol (1 mole). The dropping time is 2 hours. After the dropping is completed, react at 30-40°C for 1 hour, and introduce the generated hydrogen chloride into an absorption device equipped with water until the concentration of hydrochloric acid does not increase any more;

[0052] ② Slowly add 68.2 grams of ethylene glycol (1.1 moles) into the kettle, dropwise for 0.5 hours, control the temperature of the material at 80-90°C and continue the reaction for 2 hours, during which the generated hydrogen chloride is introduced into the absorption device filled with water , until the concentration of hydrochloric acid no longer increases;

[0053...

Embodiment 3

[0055] Embodiment 3: the preparation of organophosphate of the present invention

[0056] ① First add 153.5 grams (1 mole) of phosphorus oxychloride to the reaction device (mainly including reaction flask, stirring device, dropping device, heating and temperature control and gas absorption device), and drop 130.2 grams of octanol (1 mole), The total dropping time is 3 hours. After the dropping is completed, react at 30-40°C for 1.5 hours. During this period, introduce the generated hydrogen chloride into the absorption device equipped with water until the concentration of hydrochloric acid no longer increases;

[0057] ② Then slowly add 152.2 grams of 1,2-propanediol (2 moles) into the kettle, dropwise for 0.75 hours, control the temperature of the material at 80-90°C and continue the reaction for 1 hour, during which time the generated hydrogen chloride is introduced into the tank filled with water absorption device until the concentration of hydrochloric acid no longer incre...

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Abstract

The invention relates to a halogen-free organophosphate fire retardant and its preparation method. The fire retardant contains no halogen and will not release corrosive toxic gases when combusted. Through a reaction between polycarbonate polyol and isocyanate, an inflaming retarding element is embedded into a polyurethane foamed material and will not migrate or escape when the material is heated. Thus, the material is permanently endowed with flame resistance.

Description

technical field [0001] The invention relates to a halogen-free organic phosphate flame retardant and a preparation method thereof, belonging to the field of flame-retardant polyurethane foam. Background technique [0002] Polyurethane foam is widely used in building insulation materials, furniture, car seat cushions, etc. Due to its flammability, the flame retardant modification of polyurethane foam has become a research hotspot in this field. At present, the most widely used is halogenated flame retardants, but there are defects such as easy migration and dissipation, unsustainable flame retardancy, and more smoke and toxic gases (hydrogen halides) when burning, so halogenated flame retardants Does not comply with increasingly stringent halogen-free requirements. In contrast, reactive phosphorus-based flame retardants have the characteristics of low dosage, long-lasting and stable flame retardancy, and no corrosive gas release during combustion. They are a better choice f...

Claims

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Application Information

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IPC IPC(8): C08G79/04C07F9/12C07F9/11C07F9/09C08G18/64C08G18/32
Inventor 徐大勇邹明国毛维友
Owner 常熟国和新材料有限公司
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