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Low temperature and impact resistant PC composite material and its preparation and application in air conditioner shell

A composite material and impact-resistant technology, which is applied in the field of low-temperature-resistant and impact-resistant PC composite materials and its preparation and application in air-conditioning shells, can solve the impact of PC resin impact performance, low-temperature impact resistance reduction, unfavorable PC composite materials, etc. problems, to achieve excellent mechanical properties, excellent impact resistance, and comprehensive quality

Active Publication Date: 2022-07-12
宁波德伟电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this prior art has the following problems: first, the strength of PC is increased after fiber addition, but the impact toughness is greatly reduced, especially the low temperature impact resistance is greatly reduced, which limits its scope of application; second, PC is an amorphous polymer material, its binding force with glass fiber is poor, resulting in the appearance of the product floating fiber is obvious; third, adding more flame retardant bisphenol A bis (diphenyl phosphate), the impact performance of PC resin is relatively large It is not conducive to the preparation of PC composite materials with low temperature resistance and high impact resistance

Method used

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  • Low temperature and impact resistant PC composite material and its preparation and application in air conditioner shell
  • Low temperature and impact resistant PC composite material and its preparation and application in air conditioner shell
  • Low temperature and impact resistant PC composite material and its preparation and application in air conditioner shell

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preparation example

[0043] The toughening agent used in the present invention is obtained through the following processing operations to the metallocene ethylene-octene copolymer:

[0044] Add commercially available metallocene ethylene-octene copolymer into the ozone generator, and control the gas flow in the ozone generator to be 0.1m 3 / h, the ozone concentration was 55 mg / L, the molar ratio of ozone to metallocene ethylene-octene copolymer was 1.3:1, and the treatment was performed for 100 min to obtain the toughening agent metallocene ethylene-octene copolymer after ozonation reaction treatment. Wherein, the molar ratio of ozone to metallocene ethylene-octene copolymer can also be 1:1, 2:1, etc., mainly ensuring that the molar amount of ozone is not less than the molar amount of metallocene ethylene-octene copolymer.

[0045] The white carbon black in the present invention is the pretreated white carbon black, and the concrete processing operation is:

[0046] The commercially available whi...

Embodiment 1

[0050] A low-temperature-resistant and impact-resistant PC composite material is prepared by the following operations:

[0051] (1) According to the dosage shown in Table 1, add PC resin, toughening agent and white carbon black to the mixer and mix, and mix at 225°C for 45min to obtain material A;

[0052] (2) add barium sulfate and alkali-free glass fiber to material A, stir to obtain material B;

[0053] (3) Add antioxidant and halogen-free flame retardant to material B, melt and mix at 230° C. for 5 minutes to obtain material C;

[0054] (4) Add material C into the twin-screw extruder, control the temperature of the front section of the barrel to be 240 °C, the temperature of the middle section to be 230 °C, the temperature of the rear section to be 220 °C, the temperature of the die to be 90 °C, the speed of the main engine to be 350r / min, and the extruder The granulation is carried out to obtain a low temperature and impact resistant PC composite material.

Embodiment 2

[0056] A low-temperature-resistant and impact-resistant PC composite material is prepared by the following operations:

[0057] (1) According to the dosage shown in Table 1, add PC resin, toughening agent and white carbon black to the mixer and mix, and mix at 235°C for 45min to obtain material A;

[0058] (2) adding barium sulfate and alkali-free glass fiber to material A, stirring evenly to obtain material B;

[0059] (3) Add antioxidant and halogen-free flame retardant to material B, melt and mix at 238° C. for 5 minutes to obtain material C;

[0060] (4) Add material C into the twin-screw extruder, control the temperature of the front section of the barrel to be 240 °C, the temperature of the middle section to be 230 °C, the temperature of the rear section to be 220 °C, the temperature of the die to be 90 °C, the speed of the main engine to be 350r / min, and the extruder The granulation is carried out to obtain a low temperature and impact resistant PC composite material. ...

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Abstract

The invention relates to the technical field of modified plastics for electrical enclosures, in particular to a low-temperature-resistant and impact-resistant PC composite material and its preparation and application in an air conditioner housing. The low-temperature and impact-resistant PC composite material is prepared from the following raw materials by weight made of: 50-80 parts of PC resin, 5-20 parts of alkali-free glass fiber, 20-30 parts of barium sulfate, 5-15 parts of toughening agent, 2-8 parts of silica, 0.1-0.8 parts of antioxidant and 1-5 parts of a halogen-free flame retardant, the toughening agent is a metallocene ethylene-octene copolymer; it has the advantages of no floating fibers on the surface, low temperature impact resistance and good flame retardant performance.

Description

technical field [0001] The invention relates to the technical field of modified plastics for electrical housings, in particular to a low-temperature-resistant and impact-resistant PC composite material and its preparation and application in air-conditioning housings. Background technique [0002] As a common electrical appliance, air conditioners have been widely used in people's daily life, including the indoor air conditioner set indoors and the air conditioner outdoor unit suspended outdoors. housing to protect the respective internal components. Among them, the shell material of the inner unit of the air conditioner is generally thermoplastic. The common domestic materials are ABS materials and HIPS materials, and the foreign ones are engineering PP materials. [0003] However, engineering PP materials have the worst comprehensive properties such as flame retardancy, strength, impact resistance, and toughness; HIPS materials are not easy to yellow, but their strength is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L23/30C08K13/06C08K7/14C08K3/30C08K9/06C08K7/26C08K5/526
CPCC08L69/00C08K2003/3045C08L2201/02C08L2207/02C08L23/30C08K13/06C08K7/14C08K3/30C08K9/06C08K7/26C08K5/526
Inventor 汤标
Owner 宁波德伟电器有限公司
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