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Nitrogen-phosphorus flame-retardant polybutadiene material and preparation method thereof

A polybutadiene, nitrogen and phosphorus flame retardant technology, applied in the field of polymer chemical synthesis, can solve problems such as poor compatibility, and achieve the effect of durable flame retardant performance

Inactive Publication Date: 2021-01-26
邓万菁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a nitrogen-phosphorus flame-retardant polybutadiene material and a preparation method thereof. By grafting nitrogen-phosphorus flame retardant molecules on the polybutadiene molecular chain, the polybutadiene Diene materials do not produce smoke during processing, and there is no problem of poor compatibility between molecules and flame retardants, and the obtained polybutadiene materials have durable flame retardant properties

Method used

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  • Nitrogen-phosphorus flame-retardant polybutadiene material and preparation method thereof
  • Nitrogen-phosphorus flame-retardant polybutadiene material and preparation method thereof
  • Nitrogen-phosphorus flame-retardant polybutadiene material and preparation method thereof

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Effect test

Embodiment 1

[0024] Add carboxyl-terminated polybutadiene (2.0 mmol) and anhydrous tetrahydrofuran THF into the reactor, and after the reaction temperature rises to 70°C, slowly add SOCl dropwise 2 (10.0mmol), the dropwise addition completed the reaction for 2h, after finishing the reaction, the SOCl was removed by distillation under reduced pressure 2 and THF to obtain a carboxyl-terminated polybutadienyl chloride product with a yield of 78.4%.

Embodiment 2

[0026] Nitrogen-phosphorus flame retardant (1.0mmol) was added into a 50mL Schlenk bottle, and after pumping nitrogen three times, N 2 Under protection, add 30ml of anhydrous toluene to a disposable syringe, raise the temperature to 70°C, inject 1ml of pyridine after the nitrogen and phosphorus flame retardant is completely dissolved, and after stirring for 30min, add the above carboxyl-terminated polybutadienyl chloride dissolved in toluene dropwise The product (10.0mmol) was heated to 80°C and continued to react for 3 hours. The product was cooled to room temperature, and after two cycles of continuous dissolution / precipitation in toluene / methanol, it was dried in vacuum at 45°C to constant weight to obtain nitrogen-phosphorus flame-retardant polybutylene ene material with a yield of 80.2%.

Embodiment 3

[0028] Before processing, vacuum-dry the nitrogen-phosphorus flame-retardant polybutadiene material at 80°C for 12 hours, add 60wt% nitrogen-phosphorus flame-retardant polybutadiene material on an open heat refiner with a twin-roller temperature of 225°C, and wait for it to melt After wrapping and kneading for 10 minutes, the sheets are uniformly released, hot pressed on a flat vulcanizer at 230°C for 10 minutes, cold pressed at room temperature for 8 minutes, and then released. Various standard specimens are prepared on a universal prototype machine for flame retardant performance testing.

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Abstract

The invention discloses a nitrogen-phosphorus flame-retardant polybutadiene material and a preparation method thereof. A nitrogen-phosphorus flame retardant is grafted on a polybutadiene molecular chain to obtain a nitrogen-phosphorus flame-retardant polybutadiene material, so that polybutadiene molecules have flame retardancy. The problems that due to the fact that flame retardant molecules and apolybutadiene base material are only physically mixed, the chemical bonding effect does not exist, thus the bonding acting force between the flame retardant molecules and the polybutadiene base material is weak, flame retardant components are lost, the long-term flame retardant property of a product is affected, and the dispersion uniformity of a flame retardant is not easy to guarantee are solved. The polybutadiene material does not generate smoke in the processing process, so that the obtained polybutadiene material has lasting flame retardancy.

Description

technical field [0001] The invention belongs to the field of polymer chemical synthesis, and in particular relates to a nitrogen-phosphorous flame-retardant polybutadiene material and a preparation method thereof. Background technique [0002] Polybutadiene is mainly used as synthetic rubber. Solution-polymerized polybutadiene is often used together with styrene-butadiene rubber or natural rubber to make tire tread and carcass; in addition, because it is wear-resistant, it can be used as a foreskin for conveyor belts , shoe soles, motorcycle parts, etc.; 1,2-polybutadiene is mainly used as adhesives and sealants. [0003] In some cases, rubber is required to have some special properties, such as flame retardancy. However, polybutadiene rubber is relatively easy to burn. In order to improve its flame retardancy, the method generally adopted in the prior art is to add a flame retardant. Commonly used flame retardants include phosphorus-nitrogen flame retardants, halogen-cont...

Claims

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Application Information

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IPC IPC(8): C08F8/40C08F136/06
CPCC08F8/40C08F136/06
Inventor 邓万菁
Owner 邓万菁
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