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Preparation method of MPP halogen-free flame-retarding polypropylene fibers

A flame-retardant polypropylene and fiber technology, applied in the manufacture of fire-resistant flame-retardant filaments, single-component polyolefin artificial filaments, etc., can solve the problems of large amounts of halogen-containing flame retardants, smoke, and high heat generation of PP materials. Achieve the effect of improving LOI, good flame retardant effect and improving mechanical properties

Inactive Publication Date: 2017-05-31
SHAANXI JUJIEHAN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PP material is easy to burn and generates a lot of heat during the combustion process, and the molten droplets are easy to spread the flame
At present, most of the flame-retardant PP materials are mainly halogen flame-retardant, and halogen-containing flame retardants produce a lot of smoke and are toxic during the flame-retardant process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Preparation of MPP

[0023] Add 300 mL of phosphorus oxychloride and 68 g of pentaerythritol into a 500 mL three-neck flask equipped with a magnetic stirrer and an exhaust gas absorption device, heat to 50~60°C for 1~1.5 hours, and then heat to reflux until no HCl gas is released; Cool to room temperature, filter, wash twice with toluene, then wash three times with distilled water, and dry in vacuum to obtain white solid pentaerythritol diphosphate diphosphoryl chloride;

[0024] In a 250 mL three-necked flask equipped with a magnetic stirrer, add 64 g of pentaerythritol diphosphate diphosphoryl chloride, 5.2 g of melamine, 100 mL of water, and an acid-binding agent, and heat to reflux for 2 to 3 h while stirring; After the water is cooled to 10~12°C, filter, wash twice with toluene, wash three times with distilled water, and dry in vacuum to obtain a white solid, the product MPP;

[0025] (2) Preparation of flame retardant PP fiber

[0026] The first step, pretre...

Embodiment 2

[0033] (1) Preparation of MPP

[0034] Add 300 mL of phosphorus oxychloride and 68 g of pentaerythritol into a 500 mL three-neck flask equipped with a magnetic stirrer and an exhaust gas absorption device, heat to 50~60°C for 1~1.5 hours, and then heat to reflux until no HCl gas is released; Cool to room temperature, filter, wash twice with toluene, then wash three times with distilled water, and dry in vacuum to obtain white solid pentaerythritol diphosphate diphosphoryl chloride;

[0035] In a 250 mL three-necked flask equipped with a magnetic stirrer, add 64 g of pentaerythritol diphosphate diphosphoryl chloride, 5.2 g of melamine, 100 mL of water, and an acid-binding agent, and heat to reflux for 2 to 3 h while stirring; After the water is cooled to 10~12°C, filter, wash twice with toluene, wash three times with distilled water, and dry in vacuum to obtain a white solid, the product MPP;

[0036] (2) Preparation of flame retardant PP fiber

[0037] The first step, pretre...

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Abstract

The invention relates to the technical field of a synthetic fiber industry and in particular relates to a preparation method of MPP halogen-free flame-retarding polypropylene (PP) fibers. The preparation method of the MPP halogen-free flame-retarding polypropylene fibers comprises the following steps: (1) preparing MPP; (2) preparing flame-retarding PP fibers. The MPP halogen-free flame-retarding polypropylene fibers prepared by the preparation method has relatively good flame-retarding effect; the LOI (Limited Oxygen Index) of the irradiated flame-retarding PP fibers is greatly improved and the mechanical properties are improved; the breaking strength is 3.08cN / dtex.

Description

technical field [0001] The invention relates to the technical field of synthetic fiber industry, in particular to a preparation method of MPP halogen-free flame-retardant polypropylene fiber. Background technique [0002] Polypropylene (PP) fiber has many excellent properties such as strong rigidity, impact resistance, UV resistance, good hygroscopicity, and low manufacturing cost, and is widely used in chemical industry, chemical fiber, construction and other fields. However, the PP material is easy to burn and generates a lot of heat during the combustion process, and the molten droplets are easy to spread the flame. At present, most flame-retardant PP materials are mainly halogen flame-retardant, and halogen-containing flame retardants produce a lot of smoke and are toxic during the flame-retardant process. With the enhancement of people's awareness of safety and environmental protection, halogen-free flame retardant has become the development trend of flame retardant PP...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/46D01F1/07
CPCD01F6/46D01F1/07
Inventor 李长英
Owner SHAANXI JUJIEHAN CHEM CO LTD