Halogen-free flame-retardant polypropylene (PP) material and preparation method thereof

A flame-retardant polypropylene and polypropylene resin technology, applied in the field of polymer materials, can solve the problems of long-term high-temperature yellowing of halogen-free flame-retardant materials, impact on product aesthetics, yellowing, etc., and achieve efficient free radical capture Functional, excellent long-term thermal stability, good absorption effect

Inactive Publication Date: 2019-03-22
GUANGDONG ALDEX NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For heater materials, whether the flame retardant performance is qualified will directly affect the safety of users using the product. The use of halogen-free flame-retardant materials meets the requirements of green, environmental protection, and health, but halogen-free flame-retardant PP can It is easy to produce yellowing under the environment (especially the air outlet of the heater, the maximum temperature can reach 130 ℃), which will have a significant impact on the aesthetics of the product
[0004] In Chinese pate

Method used

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  • Halogen-free flame-retardant polypropylene (PP) material and preparation method thereof
  • Halogen-free flame-retardant polypropylene (PP) material and preparation method thereof
  • Halogen-free flame-retardant polypropylene (PP) material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5、 comparative example 1-6

[0042] This example provides a halogen-free flame-retardant polypropylene material and a preparation method thereof. The raw material formula is shown in Table 1 in parts by weight:

[0043] Table 1 Formulation composition of halogen-free flame-retardant polypropylene

[0044]

[0045] * Note: The ratio of compounded main antioxidant AO-20: AO-80 is 1:1.

[0046] Mix the above raw materials in a high-speed mixer for 5 minutes and then place them in a twin-screw extruder. The zone temperature is 180-190°C, the five-zone temperature is 180-190°C, the machine head temperature is 180-200°C, and the host speed is 300-450 rpm; extruding and granulating can obtain long-term high-temperature yellowing-resistant halogen-free flame-retardant polypropylene Material.

[0047] Effect test

[0048] Using the halogen-free flame-retardant polypropylene material prepared in Examples 1-5 and Comparative Examples 1-4, inject the prepared long-term high-temperature yellowing-resistant halog...

Embodiment 1

[0054] The flame retardant rating of Example 1 and the flame retardant rating after the thermal oxygen aging test are V1, which is slightly worse than other examples, and the mechanical properties of Example 5 are slightly worse than other examples. The possible reason is that the flame retardant and The ratio of the high-efficiency compound antioxidant system of the hindered phenol primary antioxidant, the high-temperature-resistant hydrolysis-resistant phosphate auxiliary antioxidant, the thioester auxiliary antioxidant and the weakly basic hindered amine stabilizer It affects the flame retardancy and mechanical properties, but Examples 1-5 can achieve long-term high-temperature yellowing resistance, while maintaining good flame retardancy and good mechanical properties.

[0055] In Comparative Example 1, compared with Example 2, it adopts an ordinary antioxidant system, and the color difference value after the thermo-oxidative aging test is larger; Compared with Example 2, ...

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Abstract

The invention discloses halogen-free flame-retardant polypropylene (PP) resistant to long-term high-temperature yellowing and a preparation method thereof. The halogen-free flame-retardant PP is prepared from the following raw materials in parts by weight: 70-80 parts of PP resin, 20-30 parts of halogen-free flame-retardant agent, 0.2-0.5 part of hindered phenol primary antioxidant, 0.2-0.5 part of phosphite ester auxiliary antioxidant, 0.1-0.5 part of thioester type auxiliary antioxidant, 0.2-0.5 part of hindered amine stabilizing agent, and 0.5-1 part of lubricating agent. The invention alsodiscloses a preparation method of the halogen-free flame-retardant PP resistant to long-term high-temperature yellowing. The halogen-free flame-retardant polypropylene material disclosed by the invention has excellent long-term high-temperature yellowing resistance, high flame-retardant effect and excellent comprehensive performance.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a halogen-free flame-retardant polypropylene material resistant to long-term high-temperature yellowing and a preparation method thereof. Background technique [0002] Polypropylene material itself is a flammable material, its oxygen index is low, only 17.0-18.0%, and its char formation rate is low, and it is easy to produce molten droplets when burning, so it is required to be flame-retardant modified in many applications . At present, the flame retardant of polypropylene is mainly used to add flame retardants at home and abroad. Due to the large amount of smoke generated by halogen-containing flame retardants, the hydrogen halide gas released is corrosive and causes secondary pollution to the environment. Therefore, the use of halogen-free flame retardants to replace bromine-antimony flame retardants has become the development trend of the industry. Among the halogen-free add...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K5/3462C08K5/3492C08K5/372C08K5/103C08K5/00
CPCC08K5/3462C08K5/00C08K5/103C08K5/34924C08K5/372C08L2201/02C08L2201/08C08L23/12
Inventor 于海鸥杨华军王灿耀易庆锋方安平
Owner GUANGDONG ALDEX NEW MATERIAL CO LTD
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