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Ultrahigh-molecular weight polyethylene modified nylon 66 and preparation method thereof

An ultra-high molecular weight, polyethylene modification technology, applied in the field of modified nylon 66, can solve the problem of poor wear resistance of nylon 66, and achieve the effect of improving wear resistance

Active Publication Date: 2015-05-13
NANJING LIHAN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the defect of poor wear resistance of nylon 66 in the prior art, the present invention provides a kind of ultra-high molecular weight polyethylene modified nylon 66 and its preparation method, which not only retains the original wear resistance of ultra-high molecular weight polyethylene, but also makes it It is "riveted" together with nylon 66, which is convenient to add to nylon 66, and significantly improves the wear resistance of nylon 66.

Method used

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  • Ultrahigh-molecular weight polyethylene modified nylon 66 and preparation method thereof

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Effect test

Embodiment 1

[0021] Weighing mass fraction is 10% heterogeneous maleic anhydride grafted ultra-high molecular weight polyethylene, 88% nylon 66, 0.3% composite antioxidant, 1.7% lubricant, the relative viscosity of said nylon 66 is 2.5, non Homogeneous maleic anhydride grafted ultra-high molecular weight polyethylene, with an average molecular weight of 1 million and a density of 0.936-0.946g / cm 3 , Particle size: 80-100 mesh, heterogeneous surface grafted with maleic anhydride ultra-high molecular weight polyethylene powder particles The manufacturing method is to use acetic anhydride as the medium, maleic anhydride as the grafting agent, benzoyl peroxide ( BPO) as the initiator, carry out heterogeneous grafting, the reaction temperature is 80-120 ° C, according to the method recorded on pages 26-30 of the third issue of "Modern Plastics Processing and Application" in 1993, the grafting rate of maleic anhydride is obtained 0.5% ultra-high molecular weight polyethylene grafted with maleic ...

Embodiment 2

[0025] Weighing mass fraction is 20% heterogeneous maleic anhydride grafted ultra-high molecular weight polyethylene, 79.4% nylon 66, 0.1% composite antioxidant, 0.5% lubricant, and the relative viscosity of said nylon 66 is 2.6, not Homogeneous maleic anhydride grafted ultra-high molecular weight polyethylene, with an average molecular weight of 3 million and a density of 0.936-0.946g / cm 3 , Particle size: 80-100 mesh, ultra-high molecular weight polyethylene powder particles grafted with maleic anhydride on the heterogeneous surface Cumene is used as an initiator to carry out heterogeneous grafting. The reaction temperature is 80-120 ° C. According to the method recorded on pages 26-30 of the third phase of "Modern Plastics Processing and Application" in 1993, the grafting ratio of maleic anhydride is obtained. It is the ultra-high molecular weight polyethylene grafted with maleic anhydride on the heterogeneous surface of 0.8%; the composite antioxidant is antioxidant 1010 (...

Embodiment 3

[0028] Taking by weighing mass fraction is 30% heterogeneous maleic anhydride grafted ultra-high molecular weight polyethylene, 68% nylon 66, 0.3% composite antioxidant, 1.7% lubricant, and the relative viscosity of described nylon 66 is 2.8, very Homogeneous maleic anhydride grafted ultra-high molecular weight polyethylene, with an average molecular weight of 6 million and a density of 0.936-0.946g / cm 3, Particle size: 80-100 mesh, UHMWPE powder particles grafted with maleic anhydride on the heterogeneous surface The manufacturing method is to use propionic anhydride as the medium, maleic anhydride as the grafting agent, 2,5 dimethyl 2,5 di-tert-butylperoxyhexyne is used as an initiator to carry out heterogeneous grafting, and the reaction temperature is 80-120 ° C. According to the method recorded on pages 26-30 of the third issue of "Modern Plastics Processing and Application" in 1993, Obtain the ultra-high molecular weight polyethylene of heterogeneous surface grafting mal...

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Abstract

The invention discloses ultrahigh-molecular weight polyethylene modified nylon 66 and a preparation method thereof. The ultrahigh-molecular weight polyethylene powder particle surface heterogeneous-grafting maleic anhydride is used as a nylon 66 wear-resistant modifier to reduce the abrasion of the nylon 66. The ultrahigh-molecular weight polyethylene modified nylon 66 consists of 10-30% of ultrahigh-molecular weight polyethylene, 68-88% of nylon 66, 0.1-0.3% of composite antioxidant and 0.5-1.7% of lubricant; the ultrahigh-molecular weight polyethylene is the heterogeneous maleic anhydride-grafting ultrahigh-molecular weight polyethylene; and the components are extruded and granulated by a parallel co-rotating twin screw extruder. The method disclosed by the invention is simple and easy to implement; and the intrinsic wear resistance of the ultrahigh-molecular weight polyethylene is maintained, and the ultrahigh-molecular weight polyethylene is 'riveted' with the nylon 66 to be conveniently added into the nylon 66, thereby remarkably improving the wear resistance of the nylon 66.

Description

technical field [0001] The invention relates to modified nylon 66, in particular to an ultra-high molecular weight polyethylene modified nylon 66 and a preparation method thereof. Background technique [0002] Nylon 66 is a general-purpose engineering plastic with high mechanical strength, good solvent resistance and moderate price. Widely used in machinery manufacturing, auto parts, electronic appliances, sports equipment and other fields. But in the case of some special requirements, it is still necessary to improve its wear resistance. In order to improve its wear resistance, it is often necessary to add wear-resistant materials, such as graphite, molybdenum disulfide, polytetrafluoroethylene, etc. Graphite and molybdenum disulfide are inorganic fillers, but the affinity between inorganic fillers and nylon is poor, which will greatly reduce the mechanical properties. Moreover, it brings bad effects of "coloring" to nylon; at the same time, polytetrafluoroethylene and n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08L51/06C08F255/02B29B9/06B29C47/92B29C48/92
CPCB29C48/625B29C48/022B29C48/875B29C48/92B29C2948/92704B29C2948/92895B29C2948/92904
Inventor 袁锦瑶别群梅张伟邱添福曹壐
Owner NANJING LIHAN CHEM CO LTD
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