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Modified liquid rubber toughed nylon material for bearing retainer and preparation method

A liquid rubber, bearing retention technology, applied in the field of engineering plastic modification processing, can solve the problems of poor compatibility, unable to meet the high temperature impact resistance of bearing cage materials, and achieve excellent temperature and wear resistance, long-term stable use, The effect of prolonging the life cycle

Inactive Publication Date: 2017-02-22
NINGXIA BAOTA PETROCHEM SCI & TECH IND DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The common way to improve the impact strength of nylon materials is to modify them by blending them with rubber elastomers, but the compatibility of general rubber elastomers with nylon is poor, so it needs to be modified, that is, the introduction of polar groups increases Its polarity can make it better compatible with nylon materials
[0005] Although this type of modification method has been reported in relevant literature, it still cannot meet the high temperature impact resistance of the bearing cage material. Based on this, the present invention will provide a bearing cage that is applied to subway high-speed rail and has good toughness at high temperature. The preparation method of the nylon material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of preparation method of modified liquid rubber toughened nylon material, with molecular weight being 30,000 liquid polyisoprene rubber, maleic anhydride, dibenzoyl peroxide and benzene, according to liquid polyisoprene rubber quality Mix 1:0.02:0.02:1.3 evenly, react at 75°C for 5 hours, and obtain modified liquid rubber after purification; dry 73% nylon 66 in a blast drying oven at 100°C for 6 hours, and then mix with 25% The toughener was blended in a high mixer for 5 minutes to prepare a premix, and then this premix was mixed with 1% N,N'-bis(2,2,6,6-tetramethyl-4-piperidine Base)-1,3-phthalamide and 1% silicone powder are evenly mixed, then added to a twin-screw extruder, and extruded and granulated at 280-290°C to obtain modified liquid rubber toughened nylon 66 .

Embodiment 2

[0026] A kind of preparation method of modified liquid rubber toughened nylon material, with molecular weight being 30,000 liquid polyisoprene rubber, maleic anhydride, dibenzoyl peroxide and toluene, according to liquid polyisoprene rubber quality 1:0.03:0.02:1.4 mixed evenly, reacted at 75°C for 5 hours, and obtained modified liquid rubber after purification; dried 79% nylon 66 in a blast drying oven at 110°C for 5 hours, and then mixed with 20% The toughener was blended in a high mixer for 5 minutes to prepare a premix, and then this premix was mixed with 0.1% N,N'-bis(2,2,6,6-tetramethyl-4-piperidine base)-1,3-phthalamide, 0.4% silicone powder, and 0.5% montan wax are evenly mixed, then added to a twin-screw extruder, and extruded and granulated at 280-290°C to obtain a modified liquid Rubber-toughened nylon 66.

Embodiment 3

[0028] A kind of preparation method of modified liquid rubber toughened nylon material, with molecular weight being 40,000 liquid polyisoprene rubber, maleic anhydride, dibenzoyl peroxide and xylene, according to liquid polyisoprene rubber quality 1:0.04:0.03:1.4 mixed evenly, reacted at 75°C for 5 hours, and obtained modified liquid rubber after purification; dried 93% nylon 66 in a blast drying oven at 120°C for 4 hours, and then mixed with 5 % Toughening agent was blended in a high mixer for 5 minutes to prepare a premix, and then this premix was mixed with 1.5% N,N'-bis(2,2,6,6-tetramethyl-4-piper Pyridyl)-1,3-phthalamide and 0.5% ethylene bisstearamide are evenly mixed, then added to a twin-screw extruder, extruded and granulated at 280-290°C to obtain modified liquid rubber Tough nylon 66.

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Abstract

The invention relates to the field of modification processing of engineering plastic, in particular to a modified liquid rubber toughed nylon material for a bearing retainer and a preparation method. The modified liquid rubber toughened nylon material is prepared from 73%-93% of nylon resin, 5%-25% of a flexibilizer, 0.1%-2% of a stabilizer and 0.1%-2% of a lubricating agent in percentage by weight. The prepared nylon material has good impact resistance at the high temperature, good temperature resistance and good abrasive resistance, and the service life of the bearing retainer can be prolonged effectively.

Description

technical field [0001] The invention relates to the field of modification and processing of engineering plastics, in particular to a liquid rubber toughened nylon material for a bearing cage and a preparation method thereof. Background technique [0002] Polyamide, commonly known as nylon, abbreviated as PA in English, is a general term for a class of polymers containing amide groups in the repeating unit of the main chain of the macromolecule. It has good mechanical properties, self-lubricating properties, flame retardancy, wear resistance, and light weight. , easy processing, wide operating temperature, widely used in automotive, electrical and electronic, transportation and machinery manufacturing industries. The nylon material modified by glass fiber filling has more excellent mechanical properties. It has been used in the manufacture of bearing cages for rail transit such as subways and high-speed rails, which greatly meets the needs of today's society for high-speed, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L51/04C08L83/04C08L91/06C08K7/14C08K5/3435C08K5/20
CPCC08L77/06C08L2201/08C08L2205/03C08L2205/035C08L51/04C08L83/04C08L91/06C08K7/14C08K5/3435C08K5/20
Inventor 马金红李国明张立忠杨学彦
Owner NINGXIA BAOTA PETROCHEM SCI & TECH IND DEV