High-temperature-resistant and high-humidity-resistant self-lubricating polyketone composition and application thereof

A self-lubricating, high-heat-resistant technology, applied in the field of self-lubricating materials, can solve the problems of inability to combine polyketone matrix, inability to exert wear resistance, instability and other problems

Pending Publication Date: 2021-09-10
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this technical scheme, polyethylene has low surface energy, and it cannot be well combined with polyketone matrix when used alone, so it cannot exert its wear resistance. The block structure of anhydride grafted polyethy

Method used

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  • High-temperature-resistant and high-humidity-resistant self-lubricating polyketone composition and application thereof
  • High-temperature-resistant and high-humidity-resistant self-lubricating polyketone composition and application thereof
  • High-temperature-resistant and high-humidity-resistant self-lubricating polyketone composition and application thereof

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preparation example Construction

[0053] In the second aspect, the present invention provides a high heat and high humidity self-lubricating polyketone masterbatch obtained by the following preparation method:

[0054] Prepare the above-mentioned high heat-resistant and high-humidity self-lubricating polyketone composition;

[0055] Modify part of the coupling agent on the surface of chopped basalt fiber to obtain modified fiber;

[0056] Mix anhydrous polyketone resin, remaining coupling agent, antioxidant, and polytetrafluoroethylene micropowder, and add modified fiber through side feeding to obtain a premix;

[0057] Melt and blend the premix at 220-260°C, and finally extrude and granulate to obtain high heat and high humidity self-lubricating polyketone masterbatch.

[0058] In the third aspect, the present invention provides a high heat and high humidity resistant self-lubricating workpiece prepared from the above high heat and high humidity self-lubricating polyketone composition, in particular, the hig...

Embodiment 1

[0061] The high heat-resistant and high-humidity self-lubricating polyketone composition provided in this example includes the following components by weight percentage: polyketone 73%, polytetrafluoroethylene micropowder 12%, chopped basalt fiber 12%, coupling agent 2.5% %, antioxidant 0.5%.

[0062] The preparation method of the high heat and high humidity self-lubricating polyketone masterbatch provided in this embodiment comprises the following steps:

[0063] (1) Prepare the high heat and high humidity self-lubricating polyketone composition according to the following weight percentage: 73% polyketone, 12% polytetrafluoroethylene micropowder, 12% chopped basalt fiber, 2.5% coupling agent, 0.5% antioxidant .

[0064] (2) Surface modification treatment of chopped basalt fiber: add chopped basalt fiber to the ethanol solution of KH550 coupling agent, the mass percentage concentration of KH550 coupling agent is 3%, and fully stir in a high-speed shear disperser for 30min , ...

Embodiment 2

[0069] The high heat-resistant and high-humidity self-lubricating polyketone composition provided in this example is composed of the following components by weight percentage: 70% polyketone, 15% polytetrafluoroethylene micropowder, 12% chopped basalt fiber, and a coupling agent 2.5%, antioxidant 0.5%.

[0070] The preparation method of the high heat and high humidity self-lubricating polyketone masterbatch provided in this embodiment comprises the following steps:

[0071] (1) Prepare the high heat and high humidity self-lubricating polyketone composition according to the following weight percentage: 70% polyketone, 15% polytetrafluoroethylene micropowder, 12% chopped basalt fiber, 2.5% coupling agent, 0.5% antioxidant ;

[0072] (2) Surface modification treatment of chopped basalt fiber: add chopped basalt fiber to the ethanol solution of KH550 coupling agent, the mass percent concentration of KH550 coupling agent is 2%, and fully stir in a high-speed shear disperser for 30...

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Abstract

The invention discloses a high-temperature-resistant and high-humidity-resistant self-lubricating polyketone composition and application thereof, and the high-temperature-resistant and high-humidity-resistant self-lubricating polyketone composition comprises the following components in percentage by weight: 65-75% of polyketone; 10%-15% of polytetrafluoroethylene micro powder; 10%-15% of chopped basalt fiber; 1%-3% of a coupling agent; and 0.1%-0.5% of an antioxidant. The high-temperature-resistant and high-humidity-resistant self-lubricating polyketone composition can be prepared into high-temperature-resistant and high-humidity-resistant self-lubricating workpieces through an injection molding or extrusion molding process, and is particularly used for manufacturing automobile parts. The high-temperature-resistant and high-humidity-resistant self-lubricating workpiece prepared through the method has high mechanical performance, the bending modulus can reach 3417 MPa, the bending strength can reach 94 MPa, the friction coefficient can be as low as 0.12, the abrasion loss is as low as 3.6 mm < 3 >, the hydrolysis resistance is good, after a hydrothermal aging experiment, the bending modulus can still be kept 93% or above, the bending modulus can reach 3363 MPa, the bending strength can reach 85 MPa, and the product has self-lubricating property and longer service life.

Description

technical field [0001] The invention relates to the field of self-lubricating materials, in particular to a high-heat and high-humidity self-lubricating polyketone composition and its application. Background technique [0002] Self-lubricating bearing technology has completely broken through the limitations of relying on grease lubrication to achieve oil-free lubrication. Self-lubricating bearing technology is the development trend of lubrication technology at present. The development of self-lubricating composite materials with high mechanical strength and good friction performance has become a new trend in the field of tribology. Important hotspots, among them, polymer-based self-lubricating bearings are widely used because of their advantages such as self-lubricating, wear-resistant, noise reduction, low density, simple molding, and maintenance-free. [0003] Polymer-based self-lubricating bearing materials are mainly based on thermoplastic or thermosetting resins, which ...

Claims

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Application Information

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IPC IPC(8): C08L73/00C08L27/18C08K9/06C08K7/10C08J5/06
CPCC08J5/06C08J2373/00C08J2427/18
Inventor 易俊霞李冬滨杨丹陶骏李箐马华跃
Owner DONGFENG COMML VEHICLE CO LTD
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