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Process for preparing polyamide/polyolefin alloy

A polyamide and polyolefin technology, which is applied in the field of preparation of polyamide/polyolefin alloys, can solve the problems of decreased mechanical properties, poor dimensional stability, loss of rigidity, etc., and achieves low production cost, good impact resistance, and dimensional stability. easy effect

Inactive Publication Date: 2006-10-18
TIANJIN PLASTICS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyamide (Polyamide is abbreviated as PA, commonly known as nylon), has excellent properties such as high mechanical strength, wear resistance, oil resistance and self-lubrication, and is one of the most widely used engineering plastics. Among them, the ones with excellent wear resistance and low temperature resistance are It is nylon 6, the price is low, but because the amide group of polyamide and water molecules can form hydrogen bonds, there is a phenomenon of high water absorption in dry state and low temperature environment, moisture absorption increases toughness at the same time, but it loses Rigidity, resulting in poor dimensional stability, mechanical performance decline and other shortcomings, so that PA is greatly limited in practical applications

Method used

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  • Process for preparing polyamide/polyolefin alloy
  • Process for preparing polyamide/polyolefin alloy
  • Process for preparing polyamide/polyolefin alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 2-6 parts of polypropylene to 100 parts by weight of 50% polyamide (PA6) (general nylon material, produced by Heilongjiang Nylon Factory) and 50% polypropylene (PP) (1330 pellets, Beijing Yanshan Petrochemical) Branch maleic anhydride (PP-MAH): (GPM200B pellets, Ningbo Nengzhiguang New Material Technology Co., Ltd.) In a vacuum oven at 80℃, vacuum degree of 0.09Mpa, vacuum drying for 4 hours, in a mixer Set the temperature at 200℃-220℃ to control the rotor speed at 30-45r / min. After banburying and blending for 12 minutes, the melt temperature will reach 255℃; then put the blend obtained by banburying in a vacuum drying oven Vacuum drying for 4 hours at a temperature of 80°C and a vacuum of 0.09Mpa. Use a mold at 220°C-240°C for about 140-160 seconds, and then cold press for about 20-30 seconds to produce thicknesses of 1mm and 4mm. The sheet is reserved.

[0021] DSC analysis:

[0022] The alloy sample obtained by blending was vacuum dried in a vacuum oven at 80°C and a...

Embodiment 2

[0026] Add 2-6 to 100 parts by weight of 50-95% polyamide (PA6) (general nylon material, produced by Heilongjiang Nylon Factory) and 50-5% polypropylene (PP) (1330 pellets, Beijing Yanshan Petrochemical) Portions of polypropylene grafted maleic anhydride (PP-MAH): (GPM200B pellets, Ningbo Nengzhiguang New Material Technology Co., Ltd.) vacuum drying for 4 hours at 80℃ in a vacuum oven and a vacuum of 0.09Mpa Set the temperature in the internal mixer to 200℃-220℃ and control the rotor speed to 30-45r / min. After 12 minutes of banburying and blending, the melt temperature will reach 255℃; The vacuum drying oven is vacuum-dried for 4 hours at a temperature of 80°C and a vacuum of 0.09Mpa. The mold is heated and pressed at 220°C-240°C for about 140-160 seconds, and then cold pressed for about 20-30 seconds to make the thickness. Available for 1mm and 4mm sheets.

[0027] Dry in a vacuum oven at 80℃ and a vacuum of 0.09Mpa for 4 hours, set the temperature in the internal mixer to 200℃-2...

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Abstract

The invention relates to a preparation method of a polyamide / polyolefin alloy, which comprises adding 2-6 parts of compatibilizer to 100 parts by weight of 50-95% polyamide and 50-5% polyolefin in a vacuum drying oven 80°C, vacuum drying for 4 hours under the condition of vacuum degree of 0.09Mpa, set the temperature in the internal mixer to 200-220°C and control the rotor speed to 30-45r / min, after 12 minutes of internal mixing and blending, the melt temperature reaches 230-260°C; then dry the blend obtained by banburying in a vacuum oven at a temperature of 80°C and a vacuum degree of 0.09Mpa for 4 hours, and use a mold to heat press at 220°C-240°C for about 140-160 seconds, and then cold press for about 20-30 seconds to make sheets with a thickness of 1mm and 4mm for later use. The polyamide / polyolefin co-alloy obtained in the invention has excellent mechanical properties of toughness, hardness, and rigid phase balance, and also has excellent properties such as good impact resistance, chemical resistance, dimensional stability, and easy processing.

Description

Technical field [0001] The invention belongs to the technical field of polymer materials, and particularly relates to a preparation method of a polyamide / polyolefin alloy. Background technique [0002] Polyamide (Polyamide abbreviated as PA, commonly known as nylon), has high mechanical strength, wear resistance and oil resistance and self-lubrication. It is one of the most widely used engineering plastics. Among them, it has excellent wear resistance and low temperature resistance. It is nylon 6, the price is lower, but because the amide group of the polyamide can form hydrogen bonds between the water molecules, there is a phenomenon of higher water absorption in the dry state and low temperature environment, and the moisture absorption increases the toughness at the same time, but it loses Rigidity causes shortcomings such as poor dimensional stability and reduced mechanical properties, which greatly limits the practical application of PA. Duput was the first company to blend p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/00C08L23/12
Inventor 孟永新曹常在陈俊尧赤英俊王艳明刁美珠
Owner TIANJIN PLASTICS RES INST CO LTD