Anti-aging lubricating nylon-66 material with appropriate rigidness and flexibility

An anti-aging and nylon technology, applied in the field of engineering plastics modification and engineering plastics rigid-tough balance modification, can solve the problems of nylon materials such as anti-aging properties, processing properties, poor anti-aging properties, and high rigidity, etc., and achieve excellent performance. Effects of physical and mechanical properties, excellent anti-aging properties, and excellent tribological properties

Active Publication Date: 2012-12-12
NO 53 RES INST OF CHINA NORTH IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, domestic lubricated nylon 66 materials are mainly prepared by lubricant plus fiber reinforcement, or lubricant plus compatibilizer, etc. Lubricant nylon 66 materials are prepared by lubricant plus fiber reinforcement, which has too much rigidity and too high elongation at break. Low; using lubricant plus compatibilizer to prepare lubricated nylon 66 material, its rigidity is too low, and the elongation at break is too high
Moreover, the anti-aging performance of nylon materials is not considered, and there are often disadvantages such as poor processing performance and anti-aging performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Nylon 66 with a viscosity of 2.7: 100 parts by mass; glycidyl methacrylate grafted SEBS with a grafting rate of 0.75%: 10 parts by mass; a particle size of 1000 mesh talcum powder: 10 parts by mass; molybdenum disulfide: 2 Parts by mass; channel carbon black: 4 parts by mass; compounding of antioxidant 1098 and antioxidant 168 (1:1): 0.5 parts by mass; oleamide: 2 parts by mass.

[0030] Weigh the raw materials according to the weight ratio of the above components, put them into the high mixer and mix for 5 minutes, put the mixed raw materials into the screw machine to extrude and granulate, the speed of the screw machine is 200 rpm, and the processing temperature is 240-280 °C , to obtain the anti-aging lubricating nylon 66 material involved in the present invention, the tensile strength measured by the national standard is 70MPa, the elongation at break is 30%, the flexural strength is 70MPa, the flexural modulus is 2.5GPa, and the friction coefficient is 0.17.

Embodiment 2

[0032] Nylon 66 with a viscosity of 2.5: 100 parts by mass; glycidyl methacrylate grafted SEBS with a grafting rate of 0.50%: 5 parts by mass; a particle size of 200 mesh talcum powder: 15 parts by mass; molybdenum disulfide: 8 Parts by mass; channel carbon black: 3 parts by mass; antioxidant 1098: 0.5 parts by mass; oleamide: 5 parts by mass.

[0033] The preparation method is the same as in Example 1. The tensile strength measured according to the national standard is 60MPa, the elongation at break is 36%, the bending strength is 74MPa, the bending modulus is 2.2GPa, and the friction coefficient is 0.16.

[0034] After 3500h (temperature 50℃, humidity 95%RH) heat aging, the tensile strength decreased from 60MPa to 53MPa, the bending strength decreased from 75MPa to 66MPa, and the notched impact strength decreased from 6.7kJ / m 2 down to 6.4kJ / m 2 .

Embodiment 3

[0036] Nylon 66 with a viscosity of 3.5: 100 parts by mass; glycidyl methacrylate grafted SEBS with a grafting rate of 1.0%: 25 parts by mass; a particle diameter of 750 mesh talcum powder: 50 parts by mass; molybdenum disulfide: 4 parts by mass; channel carbon black: 5 parts by mass; compounding of antioxidant 1098 and antioxidant 168 (1:1): 1 part by mass; oleamide: 4 parts by mass.

[0037] The preparation method is the same as in Example 1. The tensile strength measured according to the national standard is 74MPa, the elongation at break is 35%, the bending strength is 73MPa, the bending modulus is 2.2GPa, and the friction coefficient is 0.17.

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Abstract

The invention belongs to the technical field of a novel material, relates to the engineering plastics modification technology, and in particular to the engineering plastics flexible balance modification technology. The invention relates to an anti-aging lubricating nylon-66 material with appropriate rigidness and flexibility, which is prepared by adopting inorganic powder, anti-wear agent, flexibilizer, anti-aging assistant, internal lubricating processing assistant and the like to compositely modify the nylon-66 material. The anti-aging lubricating nylon-66 material at least comprises following ingredients (by weight percent): 100 parts of nylon-66, 5 to 25 parts of flexibilizer, 5 to 50 parts of talcum powder, 2 to 10 parts of molybdenum disulfide and 2 to 5 parts of channel black. The material has excellent tribology performance, excellent physical mechanical performance and excellent anti-aging performance, after being accelerated to age for 3500h under the hot and damp condition, the tensile strength is only reduced by 11.7 percent, the bending strength is reduced by 12 percent, and the notch impact performance is reduced by 4.5 percent. The anti-aging lubricating nylon-66 material can be widely applied to the parts requiring the lubrication and anti-aging performance such as a lubricating bearing, a shaft sleeve, a gear, a bearing holder and the like. The preparation method is simple, and the anti-aging lubricating nylon-66 material has industrialized application prospect.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to engineering plastics modification technology, in particular to engineering plastics stiffness-toughness balance modification technology. Background technique [0002] At present, domestic lubricated nylon 66 materials are mainly prepared by lubricant plus fiber reinforcement, or lubricant plus compatibilizer and other methods. [0003] CN101864168B discloses a wear-resistant self-lubricating nylon composite material prepared by using nylon as a matrix, pretreating polyethylene and carbon fibers with radiation, and adding a compatibilizer. [0004] CN01955664A discloses a kind of reinforced wear-resistant nylon 66 composite for textile equipment, which uses nylon as the matrix and adopts wear-resistant agent, glass fiber and toughening agent. [0005] CN100540607C discloses a method for preparing a reinforced and toughened nylon composite material with nylon as a matrix, usin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L51/00C08K3/34C08K3/30C08K3/04
Inventor 杨春兵吴炅王旭华何杰赵红玉殷建港徐洪波刘苏芹李辉
Owner NO 53 RES INST OF CHINA NORTH IND GRP
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