Phosphorus-containing flame retardant, flame-retarding polyester thin film and preparation methods thereof

A technology of flame retardant polyester and polyester film, applied in the field of flame retardant polyester film, can solve the problems of unstable film mechanical properties, large amount of flame retardant added, poor compatibility of film substrates, etc., and achieve high mechanical properties and thermal stability, improved flame retardant properties, good compatibility

Active Publication Date: 2012-08-15
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the defects of large amount of flame retardant added in the prior art, poor compatibility with the film substrate, and unstable mechanical

Method used

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  • Phosphorus-containing flame retardant, flame-retarding polyester thin film and preparation methods thereof
  • Phosphorus-containing flame retardant, flame-retarding polyester thin film and preparation methods thereof
  • Phosphorus-containing flame retardant, flame-retarding polyester thin film and preparation methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0050] The preparation method of phosphorus-containing flame retardant provided by the present invention, general reaction formula is as follows:

[0051]

[0052] Raw material I Raw material II

[0053] Raw material I is 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO);

[0054] The raw material II is a bisoxazoline-alkene compound; the molar ratio of the raw material I to the raw material II is: 0.5:0.35-0.5; the preparation method comprises the following steps:

[0055] (1), in N 2 Under the atmosphere, add the measured amount of xylene into the flask, preheat the xylene to 90-100°C, then add the measured amount of raw material I, at this temperature, after heating for 2-2.5 hours, add the measured amount of raw material II, and mix The solution was heated for another 17-20 hours, and then cooled until no more substances were precipitated; the entire addition process and reaction process required N 2 Protect;

[0056] (2), the mixture obtained in step (1) is f...

Example Embodiment

[0072] Example 1

[0073] in N 2 Under the atmosphere, add 200ml of xylene into the flask, preheat the xylene to 90-100°C, add 125g of DOPO, at this temperature, after heating for 2 hours, add 73g of 1,2-bisoxazoline- Ethylene, the mixed solution was heated for another 17 hours, then cooled until no substance was separated out; the resulting mixture was filtered, the filtrate was poured off, and recrystallization was carried out with petroleum ether to obtain the phosphorus-containing flame retardant provided by the present invention. 1 The test results of H-NMR spectrum and infrared spectrum are shown in Table 1.

Example Embodiment

[0074] Example 2

[0075] in N 2 Under the atmosphere, add 200ml of xylene into the flask, preheat the xylene to 90-100°C, add 125g of DOPO, at this temperature, after heating for 2.5 hours, add 80g of 1,2-bisoxazoline- Ethylene, the mixed solution was heated for another 20 hours, and then cooled until no more substances were precipitated; the obtained mixture was filtered, the filtrate was poured off, and petroleum ether was used for recrystallization to obtain the phosphorus-containing flame retardant provided by the invention.

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Abstract

The invention relates to the technical field of flame-retarding polyester thin film, and particularly relates to a phosphorus-containing flame retardant, a flame-retarding thin film and preparation methods thereof. In order to solve the problems of large flame retardant adding amount, low compatibility with a thin film substrate and unstable mechanical performance, the invention provides the phosphorus-containing flame retardant, the flame-retarding thin film and preparation methods thereof. The phosphorus-containing flame retardant has the following structural formula as shown in the specification, wherein the flame retardant has an oxazoline structure; R1 is alkylidene; and the number of C atoms is 2-6. The phosphorus-containing flame retardant has functions of expanding the chain and improving the viscosity of polyester molecules; and the flame-retarding polyester thin film with the flame retardant has high flame-retarding performance, relatively high mechanical property, high heatstability and higher light transmittance. The preparation methods are easy to operate and simple.

Description

technical field [0001] The invention relates to the technical field of flame-retardant polyester films, in particular to a phosphorus-containing flame retardant, a flame-retardant polyester film and a preparation method thereof. Background technique [0002] In the prior art, there are mainly three methods for preparing flame-retardant polyester films: the first method is to coat the surface of the film with a polymer material coating with flame-retardant groups; Problems such as decomposition due to heat treatment make the product unstable, and at the same time, this preparation method also has technological problems such as pollution. The second method is to use a copolymerized flame retardant to copolymerize with terephthalic acid and ethylene glycol to prepare flame-retardant polyester chips, and then pull the film; but this method has high copolymerization costs, complicated processes, and equipment investment. major defects. [0003] The third method is the preparati...

Claims

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Application Information

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IPC IPC(8): C08K5/5313C07F9/6571C08L67/02C08K5/134C08K5/18C08K5/17
Inventor 不公告发明人
Owner NINGBO CHANGYANG TECH
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