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Heat resistant plastic bearing material and its prepn. method

A plastic bearing and heat-resistant technology, which is applied in the field of composite materials of polymer compounds, can solve the problems of high melt viscosity and difficult injection molding, etc., achieve a wide range of applications, achieve reinforcement, and improve the effect of heat resistance

Inactive Publication Date: 2004-08-04
吴泽宏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most widely used are polyoxymethylene and polyamide, which have good friction resistance and wear resistance, and the molding process is convenient, but their continuous use temperature is 100°C, short-term use temperature is 130°C, and they cannot be used at higher temperatures. Work
Polytetrafluoroethylene and polyphenylene have excellent friction resistance and can be used continuously at 250°C, but their melt viscosity is too high and it is difficult to injection mold, so special molding equipment and processes must be used
There is currently no heat-resistant plastic bearing material that can be used for injection molding or compression molding with a continuous use temperature of 250°C

Method used

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  • Heat resistant plastic bearing material and its prepn. method
  • Heat resistant plastic bearing material and its prepn. method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: the preparation of propenated aralkylphenol resin

[0018] Add 100 liters of methyl ethyl ketone-xylene mixed solvent (the volume ratio of methyl ethyl ketone and xylene is 30:70) in the reactor that device has stirrer, reflux condenser, 100 kilograms of epoxy aralkylphenol resins (molecular weight 2000 , purchased from Northwestern Polytechnical University), heated and stirred to dissolve, heated up to 90±5°C, slowly dripped acrylic acid (the amount of acrylic acid was calculated according to the equimolar ratio with epoxy aralkylphenol resin), and maintained at 90±5°C React at 5°C for 2.5-3 hours, and stop the reaction until more than 95% of the epoxy groups have participated in the reaction. After washing and separating, put it in an enamel plate and dry it in a vacuum drying oven with a vacuum degree of 600-650 mm Hg. After drying to a basic constant weight, the prepared propylene-based aralkylphenol resin (molecular weight: 2400) , stored for later u...

Embodiment 2

[0019] Embodiment 2: Preparation of heat-resistant plastic bearing material

[0020] (1) Mix 90kg of polyphenylene sulfide and 10kg of thermotropic liquid crystal polymer. After mixing, dry the mixture in an oven at 120°C for 12 hours. After cooling to room temperature with the oven, add it to the extruder Carry out melt blending. During blending, the temperature of the barrel is divided into four sections. The temperature of each section from the feeding section to the extrusion port is 250°C, 270°C, 300°C, and 320°C. Extrude twice, and the extruded product is drawn Thinning and granulation are the first material granules, which are set aside.

[0021] (2) Take by weighing 100kg, 6kg and 16kg of the propylene-based aralkylphenol resin, graphite and molybdenum disulfide prepared in Example 1 and mix them, roll and mix them for 2 minutes at 85-90°C on a roller press , after rolling and mixing evenly, it is then added to the extruder for melt blending. The temperature of the ba...

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Abstract

The heat resistant plastic bearing material consists of polyphenyl thioether, thermal liquid crystal polymer, propenyl aralkyl phenolic resin, graphite and molybdenum disulfide. Its production process includes mixing, stoving extruding, drawing and pelletizing polyphenyl thioether and thermal liquid crystal polymer to produce the first kind of grains; rolling, mixing extruding, drawing and pelletizing propenyl aralkyl phenolic resin, graphite and molybdenum disulfide to produce the second kind of grains; mixing the two kinds of grains to produce the said materail. The method may be used at 250 deg.c continuously with the short time use temperature may reach 300 deg.C and may be produced into heat resisting bearing through common molding or injection. It has low friction coefficient of 0.08-2 and high compression strength.

Description

technical field [0001] The invention relates to composite materials of polymer compounds, in particular to heat-resistant plastic bearing materials and a preparation method thereof. Background technique [0002] The plastic bearing materials used at home and abroad today mainly include polyoxymethylene, polyamide, polytetrafluoroethylene, polyphenylene and so on. The most widely used are polyoxymethylene and polyamide, which have good friction resistance and wear resistance, and the molding process is convenient, but their continuous use temperature is 100°C, short-term use temperature is 130°C, and they cannot be used at higher temperatures. Work. Polytetrafluoroethylene and polyphenylene have excellent friction resistance and can be used continuously at 250°C, but their melt viscosity is too high to be injection molded, and special molding equipment and processes must be used. At present, there is no heat-resistant plastic bearing material that can be used for injection ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/04C08K3/30C08L81/02
Inventor 吴泽宏李郁忠张爱波
Owner 吴泽宏
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