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Polymeric flame retardant containing silicon, phosphorus and nitrogen elements and flame retardant polylactic acid material therefrom

A technology of polymer flame retardant and polylactic acid material, which is applied in the field of polymer flame retardant and its flame retardant polylactic acid material, can solve the problem of increasing the maximum heat release rate of polylactic acid material and easy migration of low molecular weight flame retardant. , the limiting oxygen index is not significantly improved and other problems, to achieve excellent flame retardant effect, low toxicity, reduce the effect of reducing the reduction of flame retardant efficiency

Inactive Publication Date: 2014-04-23
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zhan Jing et al. (Zhan Jing, etal. Polymer Degradation Stability, 2009, 94(3):291-296) prepared a pentaerythritol diphosphate melamine salt (SPDPM). The experimental results show that when the amount of SPDPM added reaches 25% The LOI of the material can reach 38%, and it has passed the UL94V-0 test. This kind of flame retardant is a low molecular weight flame retardant, which is easy to migrate and cause damage to the environment.
Alfsonso Gonzalez et al. (Alfsonso Gonzalez, etal. Polymer Degradation and Stability, 2012, 97:248-256) conducted research on organically modified montmorillonite and sepiolite flame-retardant polylactic acid, and the results showed that adding organically modified montmorillonite and sepiolite can increase the maximum heat release rate of polylactic acid materials, but its limiting oxygen index does not increase significantly
[0004] Among the flame retardants used in plastics, low-molecular-weight flame retardants are easy to migrate, causing harm to the environment and low flame-retardant efficiency, while high-molecular-weight flame retardants can overcome these defects

Method used

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  • Polymeric flame retardant containing silicon, phosphorus and nitrogen elements and flame retardant polylactic acid material therefrom
  • Polymeric flame retardant containing silicon, phosphorus and nitrogen elements and flame retardant polylactic acid material therefrom
  • Polymeric flame retardant containing silicon, phosphorus and nitrogen elements and flame retardant polylactic acid material therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Weigh 1.55g of 1,3-bis(3-aminopropyl)tetramethyldisiloxane and 1.01198g of triethylamine, and add 1,3-bis(3-aminopropyl)tetramethyl Disiloxane and triethylamine were dissolved in 10ml of chloroform treated with desiccant; the chloroform solution of 1,3-bis(3-aminopropyl)tetramethyldisiloxane and triethylamine was transferred into the reactor, Pass nitrogen protection, pass condensed water, stir at medium speed, and heat to reflux temperature. Weigh 1.0549g of phenyl dichlorophosphate and dissolve it in 2.5ml of dry chloroform, add the chloroform solution of phenyl dichlorophosphate dropwise to the reactor, and keep the reaction at reflux temperature for 8 hours after the addition is complete; after the reaction is complete, rotary evaporation The chloroform was removed, the residue was washed with water, then dissolved in ethanol, filtered, the filtrate was collected for rotary evaporation to remove the ethanol, the residue was dissolved in chloroform, washed ...

Embodiment 2

[0030] Example 2: Weigh 9.5 grams of polylactic acid pellets and dissolve them in 50ml of chloroform. Weigh 0.5 grams of polymer flame retardant containing silicon, phosphorus and nitrogen and dissolve them in 10ml of chloroform. After the polylactic acid is completely dissolved , Add it to the polylactic acid solution and stir, after it is completely mixed and there is no bubbles, coat the film on the glass plate and place it at room temperature to volatilize the chloroform to prepare the polymer flame retardant containing silicon, phosphorus and nitrogen of the present invention Flame retardant polylactic acid. Its limiting oxygen index value is 22.5%.

Embodiment 3

[0031] Example 3: Weigh 9 grams of polylactic acid pellets and dissolve them in 50ml of chloroform. Weigh 1 gram of polymer flame retardant containing silicon, phosphorus and nitrogen and dissolve them in 10ml of chloroform. After the polylactic acid is completely dissolved , Add it to the polylactic acid solution and stir, after it is completely mixed and there is no bubbles, coat the film on the glass plate, and volatilize the chloroform at room temperature to obtain the silicon, phosphorus, and nitrogen-containing polymer flame retardant of the present invention. Burning polylactic acid. Its limiting oxygen index value is 23.2%.

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Abstract

The invention discloses a polymeric flame retardant containing silicon, phosphorus and nitrogen elements and a flame retardant polylactic acid material therefrom. The polymeric flame retardant is synthesized by the reaction between phenyl dichlorophosphate and 1,3-bis(3-aminopropyl)tetramethyldisiloxane, and the flame retardant polylactic acid material made from the polymeric flame retardant is prepared by steps of dissolving polylactic acid and the polymeric flame retardant containing silicon, phosphorus and nitrogen elements in chloroform in certain proportion and blending. The polymeric flame retardant contains high-content flame retardant elements such as phosphorus, nitrogen, and silicon simultaneously, and is high in relative molecular mass, not easy to migrate, and degradable. The flame retardant polylactic acid material of the polymeric flame retardant is simple in formula and good in flame retardant effect, does not contain halogen, and is low in degree of harm and pollution to the human body and the environment.

Description

Technical field [0001] The invention belongs to the flame retardant technical field of flame retardants and polylactic acid materials, and specifically relates to a polymer flame retardant containing silicon, phosphorus, and nitrogen elements and a flame retardant polylactic acid material. Background technique [0002] Polylactic acid (PLA) is a non-toxic, non-irritating, non-petroleum-based environmentally friendly biodegradable plastic. It has good transparency, high strength, good biodegradability, biocompatibility and bioabsorbability. It is degraded into water and carbon dioxide to realize the circulation in nature. It is an ideal green polymer material. With the gradual maturity of polylactic acid synthesis technology, its application has been expanded from the initial use of medical sutures and biodegradable implants to the current common products such as fibers, membranes, and sheets. At present, polylactic acid is used in automobiles. The application in the fields of el...

Claims

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Application Information

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IPC IPC(8): C08G79/04C08G73/00C08L67/04C08L85/02
Inventor 王新龙廖逢辉
Owner NANJING UNIV OF SCI & TECH
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