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Plasticizing modifying treatment method for mould nylon

A technology of toughening modification and treatment method, which is applied in the field of material science to achieve the effect of improving impact toughness

Inactive Publication Date: 2010-06-09
上海化工研究院天地科技发展有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the literature and patents at home and abroad, there is no report of this kind of polyolefin toughener modified cast nylon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Prepare the cast nylon modified material according to the following steps:

[0026] (1) Preparation and aftertreatment of modifier one: get 100 parts by weight of high molecular polymer ethylene-octene copolymer (POE), 0.5 parts by weight of polar group maleic anhydride (MAH), initiator peroxide two 0.5 parts by weight of cumene (DCP), 0.005 parts by weight of 1010 antioxidant and 0.005 parts by weight of dispersant stearic acid were uniformly mixed in a high-speed mixer for 3 minutes. The melt grafting reaction was carried out in a counter-rotating twin-screw extruder. Twin-screw extruder settings: screw speed 200 rpm, processing temperature in each zone: 150°C, 160°C, 170°C, 190°C, 200°C, 210°C, extrusion and granulation. Then put the pellets into a horizontal grinding disc for crushing, after repeated grinding several times, take it out and dry it in an oven at 80°C for 1 hour, and set aside;

[0027] (2) Treatment of modifier 2: Dissolve γ-aminopropyltriethoxysila...

Embodiment 2

[0033] Prepare the cast nylon modified material according to the following steps:

[0034] (1) Preparation and aftertreatment of modifier one: get 100 parts by weight of high molecular polymer ethylene-octene copolymer (POE), 2 parts by weight of polar group maleic anhydride (MAH), initiator peroxide two 2 parts by weight of cumene (DCP), 0.01 part by weight of 1010 antioxidant and 0.01 part by weight of dispersant stearic acid were uniformly mixed in a high-speed mixer for 5 minutes. The melt grafting reaction was carried out in a counter-rotating twin-screw extruder. Twin-screw extruder settings: screw speed 200 rpm, processing temperature in each zone: 150°C, 160°C, 170°C, 190°C, 200°C, 210°C, extrusion and granulation. Then put the pellets into a horizontal grinding disc for crushing, after repeated grinding several times, take it out and dry it in an oven at 80°C for 1 hour, and set aside;

[0035] (2) Treatment of modifier 2: Dissolve γ-aminopropyltriethoxysilane (KH56...

Embodiment 3

[0041] Prepare the cast nylon modified material according to the following steps:

[0042] (1) Preparation and aftertreatment of modifier one: get 100 parts by weight of high molecular polymer ethylene-octene copolymer (POE), 1 part by weight of polar group maleic anhydride (MAH), initiator peroxide two 1 part by weight of cumene (DCP), 0.08 part by weight of 1012 antioxidant and 0.08 part by weight of dispersant stearic acid were uniformly mixed in a high-speed mixer for 4 minutes. The melt grafting reaction was carried out in a counter-rotating twin-screw extruder. Twin-screw extruder settings: screw speed 200 rpm, processing temperature in each zone: 150°C, 160°C, 170°C, 190°C, 200°C, 210°C, extrusion and granulation. Then put the pellets into a horizontal grinding disc for crushing, after repeated grinding several times, take it out and dry it in an oven at 80°C for 1 hour, and set aside;

[0043](2) Treatment of modifier 2: Dissolve γ-aminopropyltriethoxysilane (KH560, ...

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Abstract

The invention relates to a toughening modification processing method of molding nylon, which comprises firstly conducting the grinding process for ethylene-octene copolymer using as the first modifierafter melting and grafting with polar group, then carrying out the preprocess for short glass fiber with coupling agent, then conducting with the grinding process as the second modifier, mixing the first modifier and the second modifier with caprolactam monomer, heating up to melt, adding catalyst and catalyst promoter after dehydration, heating up and stirring at high speed to mix, casting intoa mould, carrying out polymerization and slow-cooling, and finally conducting with mould unloading. Compared with the prior art, the material of the invention has excellent impact strength which can increase over 30%, and the tension and bending strength can basically keep the same.

Description

technical field [0001] The invention belongs to the technical field of material science and relates to a toughening and modification treatment method for cast nylon. Background technique [0002] Cast nylon, known as monomer cast nylon (MC nylon), is an engineering material with excellent performance. It has low polymerization temperature, simple process and high crystallinity. The molecular weight of the polymer can reach about 70,000-100,000, which is several times higher than that of ordinary nylon. The crystallinity can exceed 50%, and the density is also relatively high. Therefore, all mechanical properties are good, with excellent wear resistance and self-lubrication, and chemical corrosion resistance. It is widely used in engineering fields: mining metallurgy, petrochemical industry, light industry textiles, railway transportation, etc. [0003] However, pure MC nylon is often difficult to meet some special application requirements. Under some high-impact conditions,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/16C08L51/06C08J5/08C08K9/06C08J5/10C08L77/02
Inventor 洪尉吴向阳张炜张玉梅孟赟赵春保
Owner 上海化工研究院天地科技发展有限公司