Macromolecular fire retardant with P-N bond, preparation thereof and application of macromolecular fire retardant in polylactic acid

A polymer flame retardant, P-N technology, applied in the field of flame retardant, can solve the problems of poor compatibility, low molecular weight, easy migration, etc., and achieve the effect of reducing the reduction of flame retardant efficiency, reducing damage, and low toxicity

Active Publication Date: 2015-09-23
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the reported flame retardants containing phosphorus and nitrogen elements are low molecular weight, which have the disadvantages of easy migration and poor compatibility.

Method used

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  • Macromolecular fire retardant with P-N bond, preparation thereof and application of macromolecular fire retardant in polylactic acid
  • Macromolecular fire retardant with P-N bond, preparation thereof and application of macromolecular fire retardant in polylactic acid
  • Macromolecular fire retardant with P-N bond, preparation thereof and application of macromolecular fire retardant in polylactic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: 1.60g 1,3-propanediol bis(4-aminobenzoate) and 1.01g triethylamine are dissolved in 25mL of chloroform treated with desiccant; 1,3-propanediol bis(4-aminobenzoate) Benzoic acid ester) and the chloroform solution of triethylamine move in the reactor, pass nitrogen protection, lead condensed water, stir, be heated to reflux temperature. Weigh 1.05g of phenyl dichlorophosphate and dissolve it in 5mL of dry chloroform, add the solution of phenyl dichlorophosphate in chloroform to the reactor drop by drop, keep the reaction at reflux temperature for 8h after the dropwise addition; after the reaction, remove by rotary evaporation Chloroform, the residue was dissolved in dimethyl sulfoxide, filtered to remove triethylamine hydrochloride, the filtrate was poured into a large amount of ethanol under stirring conditions to precipitate a white precipitate, filtered, washed three times with ethanol, and dried to obtain the high Molecular flame retardants. Its infrare...

Embodiment 2

[0031] Example 2: Weigh 38.8g of polylactic acid pellets, 1.2g of polymer flame retardant containing P-N bonds, and the extrusion temperature is 175°C in the first zone, 176°C in the second zone, 177°C in the third zone, and 177°C in the fourth zone. Under certain conditions, add a conical twin-screw extruder, extrude and cool to prepare a polymer flame retardant flame-retardant polylactic acid material containing P-N bonds. Measured according to the standard test method of GB / T2406-1993, the limiting oxygen index is 31.5%, and the crystallinity during cooling is 46.0%.

Embodiment 3

[0032] Example 3: Weigh 38g of polylactic acid pellets, 2g of polymer flame retardant containing P-N bonds, under the conditions that the extrusion temperature is 175°C in the first zone, 176°C in the second zone, 177°C in the third zone, and 177°C in the fourth zone , into a conical twin-screw extruder, extruded and cooled to obtain a polymer flame retardant flame retardant polylactic acid material containing P-N bonds. Measured according to the standard test method of GB / T2406-1993, the limiting oxygen index is 33.0%, and the crystallinity during cooling is 42.6%.

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Abstract

The invention discloses a macromolecular fire retardant with a P-N bond, preparation thereof and application of the macromolecular fire retardant in polylactic acid, and belongs to the technical field of flame retardance. The macromolecular fire retardant is formed by polycondensation of phenyl dichlorophosphate and 1, 3-propanediolbis (4-aminobenzoate). The macromolecular fire retardant comprises fire-retarding elements such as phosphorus and nitrogen, is high in relative molecular mass, not easy to migrate, degradable and capable of improving crystallinity of the polylactic acid effectively; a flame-retarding polylactic acid material is simple in process, good in flame retardance effect, free of halogen and low in degree of harm and pollution to human bodies and environments.

Description

technical field [0001] The invention belongs to the field of flame retardant technology, and in particular relates to a polymer flame retardant containing P-N bonds, its preparation and its application in polylactic acid. Background technique [0002] In recent years, polymer products such as polyolefins derived from petroleum products have been widely used, but the solid pollutants after use of the products are not easy to deal with, easily pollute the environment, and occupy a large amount of land resources. Therefore, the use of polymer articles with degradable properties has received increasing attention. Polylactic acid is a green polymer thermoplastic aliphatic polyester synthesized from lactic acid. Its products can be completely degraded into carbon dioxide and water by microorganisms in nature after use, and are non-toxic and non-irritating. In addition, polylactic acid has good mechanical properties, thermoplasticity, biocompatibility, and good transparency, high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G79/04C08L85/02C08L67/04B29C47/92B29C48/92
Inventor 王新龙廖逢辉居亚庆代秀曹雨李嘉玮史加新
Owner NANJING UNIV OF SCI & TECH
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