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Composite material capable of resisting ageing for long time and preparation method of composite material

A composite material and anti-aging technology, which is applied in the field of composite materials and its preparation, can solve the problems of PP/GF composite material use limitation, affecting performance, easy aging of polypropylene, etc., and achieve excellent UV aging resistance and excellent mechanical properties Effect

Inactive Publication Date: 2012-07-11
SHANGHAI SUNNY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the extreme aging of polypropylene, the use of PP / GF composites is limited
At present, most of them use compound antioxidants to improve their aging performance, and improve their aging performance by adding primary antioxidants, secondary antioxidants and secondary antioxidants, but too much antioxidants will cause their precipitation. its performance

Method used

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  • Composite material capable of resisting ageing for long time and preparation method of composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1～2

[0028] A method for preparing a composite material capable of long-term aging resistance, comprising the following steps:

[0029] Prepare raw materials according to table 1, wherein, polypropylene is the copolymerized polypropylene that melt index is 27g / 10min, and glass fiber is alkali-free untwisted coarse sand glass fiber, and compatibilizer is maleic anhydride grafted polypropylene, antioxidation The agent is natural anti-oxidation masterbatch, and the lubricant is modified ethylene bis stearic acid amide TAF.

[0030] Table 1

[0031] raw material name

Example 1

Example 2

Polypropylene

54.6

49.6

Compatibilizer

5

5

[0032] Antioxidant Masterbatch

10

15

Glass fiber GF

30

30

Lubricant TAF

0.4

0.4

[0033] Put all the components in proportion into a high mixer and mix for 2 minutes, then extrude and granulate with a screw extruder, the processi...

Embodiment 3

[0038] A method for preparing a composite material capable of long-term aging resistance, comprising the following steps:

[0039] (1) Weigh raw materials according to the following composition ratio: polypropylene 45kg, glass fiber 40kg, compatibilizer 4.9kg, antioxidant 10kg, lubricant 0.1kg, wherein, polypropylene is a copolymer with a melt index of 27g / 10min Propylene, glass fiber is alkali-free untwisted coarse sand glass fiber, compatibilizer is maleic anhydride grafted polypropylene, antioxidant is natural anti-oxidation masterbatch, lubricant is modified ethylene bis stearic acid amide TAF;

[0040] (2) Put the above-mentioned raw materials into a high mixer and mix them for 2 minutes before discharging;

[0041] (3) Put the mixed raw materials into a twin-screw extruder to granulate, control the rotating speed of the screw machine to 300 rpm, and the temperature to 220° C. After melting, extrude and granulate to obtain the product.

Embodiment 4

[0043] A method for preparing a composite material capable of long-term aging resistance, comprising the following steps:

[0044] (1) Weigh raw materials according to the following composition ratio: polypropylene 75kg, glass fiber 10kg, compatibilizer 3kg, antioxidant 11.5kg, lubricant 0.5kg, wherein, polypropylene is a copolymer with a melt index of 27g / 10min Propylene, glass fiber is alkali-free untwisted coarse sand glass fiber, compatibilizer is maleic anhydride grafted polypropylene, antioxidant is natural anti-oxidation masterbatch, lubricant is modified ethylene bis stearic acid amide TAF

[0045] (2) Put the above-mentioned raw materials into the high mixer and mix them for 3 minutes before discharging;

[0046] (3) Put the mixed raw materials into a twin-screw extruder to granulate, control the rotating speed of the screw machine to 600 rpm, and the temperature to 200° C. After melting, extrude and granulate to obtain the product.

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Abstract

The invention relates to a composite material capable of resisting ageing for a long time and a preparation method of the composite material. The composite material comprises the following components in percent by weight: 45-75 percent of polypropylene, 10-40 percent of glass fiber, 3-10 percent of compatilizer, 10-20 percent of antioxygen and 0.1-0.5 percent of lubricating agent. The preparation method comprises the steps of: placing raw material in a high speed mixer and then placing the raw materials in a double-screw extruder for granulating, controlling the rotating speed of the double-screw extruder to be 300-700 turns / min and the temperature to be 190-220 DEG C, melting and then extruding and granulating to obtain the composite material. Compared with the prior art, the PP / GF (polypropylene / glass fiber) composite material capable of resisting the ageing for a long time, prepared in the invention has excellent mechanical property, heat and oxygen ageing resistance and ultraviolet ageing resistance. The composite material can be used for manufacturing a member with higher ageing performance, and can be widely applied to the fields such as electric products and automobile parts.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a long-term aging-resistant composite material and a preparation method thereof. Background technique [0002] PP / GF is a kind of reinforced material that is widely used. Due to its high strength and low price, it can replace engineering plastics in many occasions. However, due to the extremely easy aging of polypropylene, the use of PP / GF composites is limited. At present, most of them use compound antioxidants to improve their aging performance, and improve their aging performance by adding primary antioxidants, secondary antioxidants and secondary antioxidants, but too much antioxidants will cause their precipitation. its performance. Contents of the invention [0003] The object of the present invention is to provide a long-term aging-resistant composite material with excellent mechanical properties and UV aging resistance, and heat-oxidative aging ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L51/06C08K7/14C08K5/20
Inventor 娄小安孟成铭
Owner SHANGHAI SUNNY
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