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Preparation method for phosphorus-series flame-retardant polyester material

A polyester material and phosphorus-based flame-retardant technology, which is applied in the field of preparation of phosphorus-based flame-retardant polyester materials, can solve the problems of ester bond breakage and degradation, restricting application, affecting the mechanical properties of PET, etc., and achieves stable performance and large market value. , the effect of simple process

Inactive Publication Date: 2016-04-27
SHAANXI JUJIEHAN CHEM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PET is a flammable material, and its limiting oxygen index (LOI) is 21.7%, which greatly limits its application. If the CEPP
[0003] As an additive flame retardant directly blended with PET, the active hydrogen in the carboxyl group and phosphoric acid group will cause the ester bond to break and degrade during the processing of PET, which will seriously affect the mechanical properties of PET.

Method used

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Embodiment Construction

[0012] A method for preparing a phosphorus-based flame-retardant polyester material, which is characterized in that: NaOH is prepared into an aqueous solution, CEPP is gradually added under stirring, and reacted for 5 hours; then, it is distilled under reduced pressure, crushed, and dried to obtain white powder solid CEPP-Na ; After fully drying PET and CEPP-Na in a dryer, melt and blend them with an internal mixer at 270 ° C and 80 r / min for 6 minutes; then heat-press the melted blend with an electric tablet press to obtain 3mm thick plate material.

[0013] In the preparation method of a phosphorus-based flame-retardant polyester material described in the present invention, the yield of CEPP-Na is 99.5%. The drying temperature is 160° C., and the drying time is 3 hours. The hot pressing temperature of the tablet press is 270°C. The melting point of CEPP-Na is 170.5°C. The mass fraction of the CEPP-Na is 15%. At 25°C, the solubility of CEPP in water is 3.23g / 100gH 2 O is...

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Abstract

The invention provides a preparation method for a phosphorus-series flame-retardant polyester material, which belongs to the field of material preparation. The preparation method is characterized by comprising the following steps: preparing an aqueous solution from NaOH, gradually adding CEPP under stirring and carrying out a reaction for 5 h; carrying out reduced pressure distillation, crushing and drying so as to obtain white powdery solid CEPP-Na; fully drying PET and CEPP-Na in a dryer and carrying out melt blending in an internal mixer for 6 min; and subjecting the melt blend to hot pressing with an electric tablet press so as to prepare the plate-shaped material. A phosphorus flame retardant is prepared through process improvement and has good compatibility with PET; the synthesized material has good flame retardation effect and stable performance; and the preparation method saves cost, is simple in process and suitable for industrial preparation, and has great market value.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a method for preparing a phosphorus-based flame-retardant polyester material. Background technique [0002] In recent years, polyethylene terephthalate (PET) has been widely used in the field of synthetic fibers, plastic packaging and other Et plastic products because of its excellent performance. However, PET is a flammable material, and its limiting oxygen index (LOI) is 21.7%, which greatly limits its application. If the CEPP [0003] As an additive flame retardant directly blended with PET, the active hydrogen in the carboxyl group and phosphoric acid group will cause the ester bond to break and degrade during the processing of PET, which will seriously affect the mechanical properties of PET. Contents of the invention [0004] The present invention aims to solve the above problems, and provides a method for preparing a phosphorus-based flame-retardant polyester materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K5/5313
CPCC08K5/5313C08L2201/02
Inventor 李长英
Owner SHAANXI JUJIEHAN CHEM CO LTD
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