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Halogen-free flame-retardant polyphenyl ether composition

A polyphenylene ether and composition technology, applied in the field of polymer materials, can solve the problems of mechanical properties (impact strength) and reduced heat resistance, and achieve the effect of excellent mechanical properties and heat resistance

Inactive Publication Date: 2012-09-19
江苏启蓝新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phosphate ester flame retardants have been widely used in PPO / PS alloy systems due to their halogen-free and environmentally friendly features. However, practice has proved that although PPO / PS alloys added with phosphate ester flame retardants can achieve V-1 or The flame retardant grade of V-0, but due to the strong plasticizing effect of phosphate ester, the properties of the composition, especially the mechanical properties (such as impact strength) and heat resistance are greatly reduced.

Method used

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  • Halogen-free flame-retardant polyphenyl ether composition
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  • Halogen-free flame-retardant polyphenyl ether composition

Examples

Experimental program
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Effect test

Embodiment 1

[0029] After mixing 63 parts of PPO and 27 parts of HIPS in a high-speed mixer by weight for 2 minutes, add them to the main hopper of a co-rotating parallel twin-screw extruder with a weight loss scale, feed with a weight loss scale, flame retardant RDP and BDP is heated to 90°C, mixed at a ratio of 5 / 5wt, and added from the downstream of the extruder with a liquid weight loss scale, and the ratio of main feed and liquid feed is adjusted to 90 / 10wt, and the raw materials are melted and extruded through the extruder Afterwards, it is cooled in a water tank, air-dried, and pelletized to obtain the composition.

[0030] In order to further improve the physical and mechanical properties of the composition, other modified materials can also be added, such as adding glass fiber to improve its tensile strength, modulus and heat resistance, and elastomers can also be selected to increase the impact strength of the composition .

Embodiment 2

[0032] After mixing 63 parts of PPO, 29 parts of HIPS and 3 parts of PDP with a high-speed mixer for 2 minutes by weight, they were added to the main hopper of a co-rotating parallel twin-screw extruder with a weight loss scale, and fed with a weight loss scale. Flame retardants RDP and BDP are heated to 90°C, mixed according to the ratio of 2 / 3wt, then added from the downstream of the extruder with a liquid weight loss scale, and the ratio of main feed and liquid feed is adjusted to 95 / 5wt, and the raw materials are extruded After being melted and extruded out of the machine, the composition is obtained by cooling in a water tank, air-drying, and pelletizing.

Embodiment 3

[0034] After mixing 55 parts of PPO, 30 parts of HIPS, 5 parts of elastomer SEBS and 7 parts of PDP in a high-speed mixer by weight for 3 minutes, they were added to the main hopper of a co-rotating parallel twin-screw extruder with a weight loss scale. Feed with a weight loss scale, heat the flame retardants RDP and BDP to 90°C, mix them at a ratio of 1 / 2 wt and add them from the downstream of the extruder with a liquid weight loss scale, adjust the ratio of main feed and liquid feed to 97 / 3wt, the raw materials are melted and extruded by an extruder, cooled in a water tank, air-dried, and pelletized to obtain the composition.

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PUM

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Abstract

The invention relates to a halogen-free flame-retardant polyphenyl ether composition, which comprises the following components in parts by weight: 50-90 parts of polyphenyl ether (PPO), 5-40 parts of polystyrene (PS), and 4-20 parts of phosphate mixture composed of at least two of resorcinol bis(diphenyl phosphate), bisphenol A bis(diphenyl phosphate) and hydroquinone bis(diphenyl phosphate). According to the halogen-free flame-retardant polyphenyl ether composition, the mixture composed of multiple phosphates is used for carrying out flame retardant modification on PPO / PS, the addition amount of phosphate is low and the obtained composition is excellent in mechanical property and heat resistance.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a halogen-free flame-retardant polyphenylene ether composition. Background technique [0002] Polyphenylene oxide (PPO) is one of the five major engineering plastics. It has excellent physical and mechanical properties, heat resistance and electrical insulation, and it has low hygroscopicity and excellent creep resistance. It is widely used in machinery, electronic appliances and other fields. PPO is an amorphous polymer material. Its melt viscosity is very high and its fluidity is very poor. If it is not modified, it cannot be used because it cannot be processed. The general method is to add polystyrene (PS) to prepare PPO / PS alloy material. Since PS and PPO are compatible, PPO / PS alloy basically maintains the excellent performance of PPO on the one hand, and the fluidity is greatly improved on the other hand. Improvement can be carried out by methods such as injection molding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/12C08L51/04C08K5/523
Inventor 赵春贵王铄黄兆敦
Owner 江苏启蓝新材料有限公司
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