Preparation method of glass fiber-reinforced halogen-free environmentally friendly flame-retardant modified polyester material

A flame-retardant modified polyester, environmentally friendly technology, applied in the field of preparation of halogen-free environmentally friendly flame-retardant modified polyester materials, can solve the problems of non-standard flame-retardant effect, material becoming brittle, high shear heat, etc., to achieve Good physical properties, shortened residence time, and simple process

Active Publication Date: 2016-06-08
天津然跃环保创新科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason is that organic halogen-free flame retardants often cause thermal degradation during processing and production because of their relatively low heat resistance.
As a result, the flame retardant effect of the material is not up to the standard, and it also affects other physical performance indicators of the material, such as the material becoming brittle and yellowing.
Especially under the condition of glass fiber reinforcement, the shear heat is very high during material processing, and the thermal superposition effect of heating and shearing occurs, which leads to local overheating inside the screw and causes the flame retardant to decompose

Method used

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  • Preparation method of glass fiber-reinforced halogen-free environmentally friendly flame-retardant modified polyester material
  • Preparation method of glass fiber-reinforced halogen-free environmentally friendly flame-retardant modified polyester material
  • Preparation method of glass fiber-reinforced halogen-free environmentally friendly flame-retardant modified polyester material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing a glass fiber-reinforced halogen-free environmentally friendly flame-retardant modified polyester material, comprising the following steps:

[0019] 1) Take raw materials by weight percentage: PBT79%, calcium hypophosphite 10%, PETS0.5%, anti-dripping agent PTFE0.3%, antioxidant 1680.1%, antioxidant 10100.1%; short glass fiber 10% ( OCV952A);

[0020] 2) A modified parallel co-rotating twin-screw extruder, including a main motor 1, a main feeding device 2, a main machine barrel 8, a machine head 5, and the seventh zone 4 of the main machine barrel is connected to the auxiliary feeding device 6 through a flange, The auxiliary feeding device includes an AC motor, and the AC motor drives a one-to-three distribution reducer, one of the shafts of the distribution reducer is equipped with a stirring paddle 10, and the other two shafts drive parallel twin-screws 9 in the same direction. A short glass fiber inlet 7 is provided on the fifth zone 3 of the ...

Embodiment 2

[0025] A method for preparing a glass fiber-reinforced halogen-free environmentally friendly flame-retardant modified polyester material, comprising the following steps:

[0026] 1) Weigh raw materials by weight percentage: PBT59%, calcium hypophosphite 20.3%, anti-dripping agent PTFE0.3%, antioxidant 1680.2%, antioxidant 10100.2%; short glass fiber 20% (OCV952A);

[0027] 2)-3) are the same as 2)-3) of embodiment 1.

[0028] The technical performance table of the glass fiber-reinforced halogen-free environmentally friendly flame-retardant modified polyester material prepared in Example 2

[0029]

Embodiment 3

[0031] A method for preparing a glass fiber-reinforced halogen-free environmentally friendly flame-retardant modified polyester material, comprising the following steps:

[0032] 1) raw materials are taken by weight percentage: PBT45%, calcium hypophosphite 24%, PETS0.5%, anti-dripping agent PTFE0.1%, antioxidant 1680.2%, antioxidant 10100.2%; short glass fiber 30% ( OCV952A);

[0033] 2)-3) are the same as 2)-3) of embodiment 1.

[0034] The technical performance table of the glass fiber-reinforced halogen-free environmentally friendly flame-retardant modified polyester material prepared in Example 3

[0035]

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PUM

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Abstract

The invention discloses a method for preparing a glass fiber reinforced halogen-free environment-friendly flame-retardant modified polyester material. The method comprises the following steps: 1) weighing raw materials: PBT, calcium hypophosphite, PETS, PTFE, an antioxidant 168, an antioxidant 1010 and short glass fibers; 2) reforming parallel twin-screw extruders in identical directions and connecting the seventh zone of a main cylinder with an auxiliary charging device through a flange; and 3) uniformly mixing PBT, PETS, PTFE and antioxidants, continuously adding the mixture from a main charging device, continuously adding the short glass fibers from the fifth zone of the main cylinder and continuously adding calcium hypophosphite from the auxiliary charging device. By the method, the difficult problems that the flame retardant in the prior art has poor thermal stability and is easily decomposed during the processing are solved. The process is simple and convenient and low in cost, the flame retardant can be smoothly added and uniformly distributed; the prepared glass fiber reinforced halogen-free environment-friendly flame-retardant modified polyester material reaches UL94-V0-level flame retardant effect and also has good physical property indexes.

Description

technical field [0001] The invention relates to a method for preparing a glass fiber-reinforced halogen-free, environment-friendly and flame-retardant modified polyester material. Background technique [0002] In recent years, with the discovery and confirmation of various disadvantages of traditional halogenated flame retardants to the environment, the European Union announced two mandatory directives, WEEE and RoHS, to restrict the use of certain harmful components in electronic and electrical equipment, and in 2006 The official implementation began on July 1. Compared with traditional halogen-based flame retardants, the application of halogen-free environmentally friendly flame retardants in polyester materials is not smooth. The main reason is that organic halogen-free flame retardants often cause thermal degradation during processing and production because of their relatively low heat resistance. As a result, the flame retardant effect of the material cannot meet the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L27/18C08K13/04C08K7/14C08K3/32C08K5/103C08K5/134C08K5/526
Inventor 郭雨铭
Owner 天津然跃环保创新科技有限公司
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