A kind of polypropylene/metal hydroxide/rare earth compound flame retardant material

A technology of rare earth compounds and hydroxides, which is applied in the field of polypropylene/metal hydroxide/rare earth compound flame retardant materials, to delay the degradation process, improve the vertical combustion level, and suppress violent combustion.

Active Publication Date: 2021-11-23
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on the use of rare earth compounds to improve the thermal stability of polymers mainly uses the catalytic ability, surface group replacement, sheet structure and coordination characteristics of rare earth compounds, and there are few reports on the use of their free radical capture ability.

Method used

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  • A kind of polypropylene/metal hydroxide/rare earth compound flame retardant material
  • A kind of polypropylene/metal hydroxide/rare earth compound flame retardant material
  • A kind of polypropylene/metal hydroxide/rare earth compound flame retardant material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-71

[0032] According to the polypropylene, metal hydroxide and rare earth compound in Example 1-71 of Table 1 respectively; the metal hydroxide was first dried in an oven at 80°C for 5 hours, then polypropylene was added and stirred to obtain a polypropylene / metal hydroxide mixture ;

[0033] Add 50% of the polypropylene / metal hydroxide mixture to the torque rheometer for melt blending, then add the rare earth compound, then add the remaining 50% of the polypropylene / metal hydroxide mixture, after the addition is complete, add The rotation speed was adjusted to 60r / min, and the processing was continued for 9 minutes, and the processing temperature was maintained at 180°C throughout the whole process to obtain a polypropylene / metal hydroxide / rare earth compound flame-retardant material.

Embodiment 72

[0035] The only difference from Example 1 is that in Example 72, the metal hydroxide was first dried in an oven at 60°C for 8 hours, then polypropylene was added and stirred to obtain a polypropylene / metal hydroxide mixture;

[0036] Add 40% polypropylene / metal hydroxide mixture to the torque rheometer to make it melt and blend, then add the rare earth compound, then add the remaining polypropylene / metal hydroxide mixture, adjust the speed after the addition is completed to 70r / min, and then processed for 6 minutes, the processing temperature was maintained at 190°C throughout the process, and a polypropylene / metal hydroxide / rare earth compound flame-retardant material was obtained.

Embodiment 73

[0038] The only difference from Example 1 is that in Example 73, the metal hydroxide was first dried in an oven at 90°C for 2 hours, then polypropylene was added and stirred to obtain a polypropylene / metal hydroxide mixture;

[0039]Add 60% polypropylene / metal hydroxide mixture to the torque rheometer to make it melt and blend, then add the rare earth compound, then add the remaining polypropylene / metal hydroxide mixture, adjust the rotation speed after the addition is completed to 50r / min, and then processed for 12min, the processing temperature was maintained at 160°C throughout the process, and a polypropylene / metal hydroxide / rare earth compound flame-retardant material was obtained.

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Abstract

The invention relates to the process of preparing, processing or batching polymer flame-retardant materials, in particular to a polypropylene / metal hydroxide / rare earth compound flame-retardant material and a preparation method thereof. The flame retardant material includes the following components in parts by weight: 100 parts of polypropylene, 80-140 parts of metal hydroxide, and 0.1-2.0 parts of rare earth compound. The introduction of rare earth compounds into the polypropylene / metal hydroxide system increases the thermal decomposition temperature of the composite material and prolongs the oxidation induction time, thereby improving the oxidation resistance of the polypropylene material.

Description

technical field [0001] The invention relates to the process of preparing, processing or batching polymer flame-retardant materials, in particular to a polypropylene / metal hydroxide / rare earth compound flame-retardant material and a preparation method thereof. Background technique [0002] Polypropylene is widely used in various aspects of daily life due to its excellent mechanical properties, chemical stability and ease of processing. Although the superior performance of polypropylene has made it widely used, its inherent flammability and dripping phenomenon during combustion limit its application in many fields that require high flame retardancy, such as pipes, Cables, carpets, electrical housings, etc., especially in the home appliance industry. Nevertheless, the use of modified polypropylene in the production of high-quality and low-cost household appliances in the household appliance industry still has a very broad market prospect. Considering the high requirements of h...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K3/22C08K5/42
Inventor 冉诗雅沈海峰方芳李晓楠郭正虹方征平
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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