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Halogen free antiflaming polycarbonate and rubber modified graft copolymer alloy and preparation method thereof

A technology of flame-retardant polycarbonate and graft copolymer, which is applied in the field of halogen-free flame-retardant polycarbonate and rubber-modified graft copolymer alloy and its preparation, can solve the problem of reducing the mechanical and thermal properties of PC alloys, reducing The impact strength of materials, reducing the thermal mechanical properties of materials, etc., to achieve the effects of reduced dosage, high flame retardancy and high heat resistance, and environmental friendliness

Inactive Publication Date: 2011-03-02
SHENZHEN XINGYEYUAN SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of halogen-free flame retardants used in PC alloys are basically flame retardants of phosphate esters, but most of these phosphate esters are small molecules, which are liquid or solids with low melting points at room temperature. The mechanical and thermal properties of PC alloys are greatly reduced, especially for PC alloys with a slightly lower PC content, a large amount of phosphate ester needs to be added to obtain high flame retardancy, but the heat resistance of the material is greatly reduced ( heat distortion temperature) and mechanical properties
In order to obtain high heat resistance, there are reports in the literature that add fillers (mica or talcum powder) to phosphate ester flame-retardant PC alloys. Although the addition of mica or talcum powder improves the heat resistance of PC flame-retardant alloys, but However, the impact strength of the material is greatly reduced

Method used

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  • Halogen free antiflaming polycarbonate and rubber modified graft copolymer alloy and preparation method thereof
  • Halogen free antiflaming polycarbonate and rubber modified graft copolymer alloy and preparation method thereof
  • Halogen free antiflaming polycarbonate and rubber modified graft copolymer alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Weigh the resin raw material and PTFE respectively according to the ratio shown in Table 2-2, and pre-mix them evenly with a high-speed mixing device at room temperature. After mixing evenly, add them to the extruder from the main hopper. After weighing and stirring evenly, use a special liquid feeding device to quantitatively add it to a TEX30a co-rotating twin-screw extruder (made by Japan Steel) for melt extrusion. The extrusion temperature is 230 ° C. Others are the same as Comparative Example 1. The results are shown in Table 2-1.

Embodiment 2

[0064] Weigh the resin raw materials, PX200 and TFE according to the proportions shown in Table 2-1, and pre-mix them evenly with a high-speed mixing and stirring device at room temperature. After mixing evenly, add them to the extruder from the main hopper. The liquid flame retardants RDP and BDP Also weighed in proportion and stirred evenly, quantitatively added to a TEX30a co-rotating twin-screw extruder (made by Japanese steel) with a special liquid feeding device for melt extrusion, the extrusion temperature was 230 ° C, and the others were the same as in Example 1 . The results are shown in Table 2-1.

Embodiment 3

[0066] Weigh the resin raw materials, TPP and PTFE according to the proportions shown in Table 2-1, and pre-mix them evenly with a high-speed mixing and stirring device at room temperature. After mixing evenly, add them to the extruder from the main hopper. BDP is also weighed in proportion and stirred evenly, and then quantitatively added to the TEX30a co-rotating twin-screw extruder (made by Japanese steel) with a special liquid feeding device for melt extrusion. The extrusion temperature is 230 ° C, and the others are the same as in Example 1. . The results are shown in Table 2-1.

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Abstract

The invention provides a halogen free antiflaming polycarbonate and rubber modified graft copolymer alloy. The raw materials include 80-95 parts by weight of resin mixture, 5-20 parts by weight of phosphate antiflaming agent, 0.1-2 parts of polytetrafluoroethylene; wherein the resin mixture is composed of 40-90wt% of polycarbonate and 10-60wt% of rubber modified graft copolymer. The copolymer of the invention adopts mixture of multiple phosphates as antiflaming agent, usage amount of antiflaming agent can be greatly reduced, so that polycarbonate alloy not only has good flame resistance and high heat resistance but also is different from PC material containing halogen series antiflaming agent, no toxic gas or smoke can be released in reburning process, and no carcinogenicity substance can be produced. The preparation method of the invention has simple operation, the prepared alloy is environmentally friendly, and combination of high flame resistance and high heat resistance is realized.

Description

【Technical field】 [0001] The invention relates to the field of polymer materials, in particular to a halogen-free flame-retardant polycarbonate and rubber-modified graft copolymer alloy and a preparation method thereof. 【Background technique】 [0002] Polycarbonate (PC) is a high-performance engineering plastic, which has excellent impact resistance and heat resistance, and is more and more widely used in many fields. However, the price of polycarbonate has always been high, and its melt viscosity is high. It is difficult for pure polycarbonate to be processed by ordinary plastic processing methods such as extrusion and injection molding, especially to produce parts with thinner thickness or more complex shapes. It is very difficult, and polycarbonate is prone to cracking under stress. In order to improve the performance of polycarbonate, polycarbonate and rubber-modified graft copolymers, such as acrylonitrile-butadiene-styrene copolymer (ABS) are usually blended and modif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L25/12C08L55/02C08L51/04C08L27/18C08K5/521C08K5/523B29C47/92B29C48/92
CPCB29C2948/92704B29C2948/92895B29C48/92
Inventor 付业浩
Owner SHENZHEN XINGYEYUAN SCI & TECH CO LTD