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A method for preparing ball seat material for automobile guide ball pins

A technology of guiding balls and ball seats, which is applied to steering rods, vehicle parts, steering mechanisms, etc., can solve the problems of poor bonding force at the two-phase interface and difficulty in improving the notched impact strength, and achieve excellent elongation at break and notched impact The effect of excellent strength and easy promotion

Active Publication Date: 2021-10-26
SOMIC AUTOMOTIVE COMPONENTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Since PET polyester is a crystalline polymer and polycarbonate is an amorphous polymer, the simple blend system formed by the two is prone to phase separation, and the cohesive force of the two-phase interface is poor, making it difficult to improve the notched impact strength.

Method used

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  • A method for preparing ball seat material for automobile guide ball pins
  • A method for preparing ball seat material for automobile guide ball pins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 10g of nanoscale alumina powder (average particle size = 320nm) and 5g of silane coupling agent KH570 were ultrasonically dispersed in toluene, stirred and reacted at 120°C for 4h in a nitrogen atmosphere, and then cooled to room temperature. Add 8 g of glycidyl methacrylate dissolved in toluene and a few drops of AIBN, and stir the reaction at 80° C. for 2 h in a nitrogen atmosphere. After centrifugal drying, use acetone extraction to remove unreacted coupling agent and residual toluene solvent, and finally dry to obtain modified nano-scale alumina particles. The grafting rate of glycidyl methacrylate obtained from TGA data is 13.8wt %.

[0052] Preheat 8g of modified nano-sized alumina particles at 90°C, add them to 40g of PET polyester preheated and melted at 90°C, the number-average molecular weight of PET polyester is Mn=38500 Dalton, and stir in vacuum for 2.5h, so that the two or mixed uniformly to obtain modified PET polyester.

[0053] 65g polycarbonate (numb...

Embodiment 2

[0055] 10g of nanoscale alumina powder (average particle size = 320nm) and 6g of silane coupling agent KH570 were ultrasonically dispersed in toluene, stirred and reacted at 130°C for 6h in a nitrogen atmosphere, and then cooled to room temperature. Add 12 g of glycidyl methacrylate dissolved in toluene and a few drops of AIBN, and stir the reaction at 80° C. for 2 h in a nitrogen atmosphere. After centrifugal drying, extract with acetone to remove unreacted coupling agent and residual toluene solvent, and finally dry to obtain modified nano-scale alumina particles. The grafting rate of glycidyl methacrylate obtained from TGA data is 15.4wt %.

[0056] Preheat 10g of modified nano-sized alumina particles at 90°C, add them to 40g of PET polyester that is preheated and melted at 90°C, the number average molecular weight of PET polyester is Mn=38500 Daltons, and stir in vacuum for 3h, so that the two Mix evenly to obtain modified PET polyester.

[0057] 70g polycarbonate (numbe...

Embodiment 3

[0059] Ultrasonic dispersion of 10g of nano-sized alumina powder (average particle size = 320nm) and 4g of silane coupling agent KH570 in toluene, stirred and reacted at 125°C for 3h in a nitrogen atmosphere, and then cooled to room temperature. Add 6 g of glycidyl methacrylate dissolved in toluene and a few drops of AIBN, and stir the reaction at 80° C. for 2 h in a nitrogen atmosphere. After centrifugal drying, extract with acetone to remove unreacted coupling agent and residual toluene solvent, and finally dry to obtain modified nano-scale alumina particles. The grafting ratio of glycidyl methacrylate obtained from TGA data is 11.3wt %.

[0060] Preheat 7g of modified nano-sized alumina particles at 90°C, add them to 42g of PET polyester that is preheated and melted at 90°C, the number average molecular weight of PET polyester is Mn=38500 Daltons, and stir in vacuum for 4h, so that the two Mix evenly to obtain modified PET polyester.

[0061] 60g polycarbonate (number ave...

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Abstract

Disclosed is a method for preparing a ball seat material for automobile guide ball pins, comprising the following steps: nano-scale alumina powder is modified by glycidyl methacrylate and a silane coupling agent; PET polyester and alumina particles are co- Mixed modification: polycarbonate, ethylene-methacrylate copolymer and modified PET polyester melt blended ball seat material is injection molded to form a ball seat for automobile guide ball pins. The ball seat not only has high impact strength, but also has a high elongation at break; relevant technical indicators can fully meet the performance requirements of the ball seat used for automobile guide ball pins.

Description

technical field [0001] The invention belongs to the field of automobile materials; relates to a method for preparing materials for automobile guide ball pins; more specifically, relates to a method for preparing ball seat materials for automobile guide ball pins. Background technique [0002] The guide ball pin is an important part of the car and is used to control the steering of the car. For a long time, the structure of the guide ball pin is relatively complicated, and it needs to be rotated through the shape fit between the ball seat and the cylindrical shell. The operation and assembly convenience is poor, and the processing cost of the automobile is increased to a certain extent. In addition, due to the complex structure, the guide ball pins suffer from long-term tension and pressure loads, resulting in increased wear and short service life, making it difficult to meet the reliability requirements for long-term use. [0003] In the Chinese utility model CN200820165818...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K9/06C08K3/22C08L69/00C08L23/08B62D7/18
CPCB62D7/18C08K3/22C08K9/06C08K2003/2227C08K2201/011C08L69/00C08L2205/03C08L67/02C08L23/0869
Inventor 沈百庆朱惠全
Owner SOMIC AUTOMOTIVE COMPONENTS