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Nitrogen-phosphorus flame-retardant polypropylene block copolymer and preparation method thereof

A technology of flame-retardant polypropylene and block copolymers, which is applied in the field of polymer chemical synthesis and can solve problems such as poor compatibility

Inactive Publication Date: 2021-01-22
张雪飞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a nitrogen-phosphorus flame-retardant polypropylene block copolymer and a preparation method thereof. By inserting a flame retardant macromolecule into the polypropylene molecular chain, the polypropylene molecular chain There is no problem of poor compatibility with flame retardants, and the resulting polypropylene material has durable flame retardant properties

Method used

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  • Nitrogen-phosphorus flame-retardant polypropylene block copolymer and preparation method thereof
  • Nitrogen-phosphorus flame-retardant polypropylene block copolymer and preparation method thereof
  • Nitrogen-phosphorus flame-retardant polypropylene block copolymer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Add diethyl chlorophosphate (5mmol) into a 100mL branched-necked flask, pump N 2 After three times, N 2 Under protection, add 20mL tetrahydrofuran to dissolve diethyl chlorophosphate, keep the temperature at 0°C in an ice bath, add triethylamine (5mmol), dropwise add methacrylamide (7.5mmol) dissolved in 10mL tetrahydrofuran, and drop During the addition process, the temperature of the reaction system was kept constant, and after the dropwise addition was completed, the temperature of the branched flask was raised to 35° C. for 10 h. After the reaction is completed, filter under reduced pressure, rotary evaporate, and wash with water to obtain diethyl-methacrylamide phosphate.

Embodiment 2

[0032] Add 2-(ethylmercaptothioformylthio)-2-methylpropionic acid (4.0mmol) and 20ml of anhydrous tetrahydrofuran THF into the reactor, and after the reaction temperature rises to 70°C, slowly add SOCl 2 (6.0mmol), dropwise completed reaction 2h, after finishing reaction, decompression distillation removes SOCl 2 and THF to give 2-(ethylmercaptothioformylthio)-2-methylpropionyl chloride.

[0033] Hydroxyl-terminated polypropylene (40mmol) was added into a 50ml Schlenk bottle, and after pumping nitrogen three times, N 2 Under protection, add 30ml of anhydrous toluene into a disposable syringe, raise the temperature to 70°C, inject 1ml of pyridine after the (acryloyloxyethyl) isocyanurate is completely dissolved, stir for 30min, then add dropwise the above-mentioned 2 -(Ethylmercaptothioformylthio)-2-methylpropionyl chloride, heat up to 80°C to continue the reaction for 2.5h, the product is cooled to room temperature, and after two cycles of continuous dissolution / precipitation...

Embodiment 3

[0035] Weigh polypropylene macromolecular chain transfer agent (0.1mmol), azobisisobutyronitrile (0.01mmol), diethyl-methacrylamide phosphate (10.0mmol) into a 25ml Schlenk bottle, pump nitrogen 3 times after N 2 Under protection, add 10mL of toluene / DMF (v / v=10:1), raise the temperature of the reactor to 70°C, react for 2h, put the product into liquid nitrogen to quench the reaction, and add the product dropwise to methanol / Precipitate in water, then dissolve the product in toluene, dissolve the precipitate three times continuously, filter, wash with methanol, and dry in vacuum at 45°C to constant weight to obtain a nitrogen-phosphorus flame-retardant polypropylene diblock copolymer.

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Abstract

The invention discloses a nitrogen-phosphorus flame-retardant polypropylene block copolymer and a preparation method thereof. By blocking flame retardant macromolecules on a polypropylene molecular chain, the problems that due to the fact that flame retardant molecules and a polypropylene base material are only physically mixed, the chemical bonding effect does not exist, the bonding acting forcebetween the flame retardant molecules and the polypropylene base material is weak, and flame retardant components are lost are solved, and the problems that the long-term flame retardant property of aproduct is affected and the dispersion uniformity of the flame retardant is not easy to guarantee can be solved.

Description

technical field [0001] The invention belongs to the field of macromolecule chemical synthesis, and in particular relates to a nitrogen-phosphorus flame-retardant polypropylene block copolymer and a preparation method thereof. Background technique [0002] Polypropylene is a polymer formed by the addition polymerization of propylene. It is a white waxy material with a transparent and light appearance and a density of 0.89-0.91g / cm 3 , flammable, melting point 165°C, softens at about 155°C, service temperature range is -30~140°C, can resist corrosion of acid, alkali, salt solution and various organic solvents below 80°C, can withstand high temperature and oxidation Decomposition, polypropylene is widely used in the production of clothing, blankets and other fiber products, medical equipment, automobiles, bicycles, parts, pipelines, chemical containers, etc., and is also used in food and drug packaging. [0003] The polypropylene molecular chain is composed of hydrocarbon elem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00C08F230/02
CPCC08F230/02C08F293/005C08F2438/03
Inventor 张雪飞
Owner 张雪飞