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PA6/PA66 binary copolymer material and preparation method thereof

A binary copolymer material, the technology of PA66, applied in the field of PA6/PA66 binary copolymer material and its preparation, can solve the problems of repeated use of powder, poor notched impact strength, and poor performance of parts, and achieve excellent mechanical properties, Improve material usage and reduce the effects of severe oxidation

Inactive Publication Date: 2016-08-17
GUANGDONG SILVER AGE SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, the price of PA12PA11 is relatively expensive, and its mechanical properties are nearly twice that of PA6.
Although PA6 material has good mechanical properties, its notched impact strength is poor, and its melting point is high, around 230°C, so that its sintering temperature in the SLS process must be above 200°C. When PA6 powder is exposed to 200°C for a long time When the temperature is above ℃, the oxidation is very serious, which will make the powder turn yellow. The solution is to add pigments to the powder to cover the color, but the problem that the performance of the part will deteriorate by about 20% cannot be solved, and the yellowing of the material due to oxidation will affect Due to the repeated use of powder, the current PA6 powder material is not suitable for SLS sintering

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of PA6 / PA66 binary copolymer material, comprising the following preparation steps:

[0033] (1) Mix caprolactam and hexamethylenediamine adipate in a pulverizer at a mass ratio of 9: 1 and add them into the reactor;

[0034] (2) Vacuumize and fill the reactor with nitrogen to remove the air in the reactor, seal the reactor, raise the temperature to 190°C, keep it warm for 0.5 hours, then raise the temperature to 230°C and react for 1 hour, after the reaction is completed, put the reaction product into water to cool;

[0035] (3) The reaction product is pulverized by grinding, and the powder material with a particle size of 20 μm is screened out;

[0036] (4) After drying the powder material obtained in step 3, add flow aid and antioxidant and mix evenly to obtain PA6 / PA66 binary copolymer material. The mass ratio of the flow aid and antioxidant to the total material is 0.006 :1.

Embodiment 2

[0038] A preparation method of PA6 / PA66 binary copolymer material, comprising the following preparation steps:

[0039] (1) Mix caprolactam and hexamethylenediamine adipate in a pulverizer at a mass ratio of 8:2 and add them into the reactor;

[0040] (2) Vacuumize and fill the reactor with nitrogen to remove the air in the reactor, seal the reactor, raise the temperature to 220°C, keep it warm for 3 hours, then raise the temperature to 260°C and react for 2 hours, after the reaction is completed, put the reaction product into water to cool;

[0041] (3) The reaction product is crushed by grinding, and the powder material with a particle size of 100 μm is screened out;

[0042] (4) After drying the powder material obtained in step 3, add flow aid and antioxidant and mix evenly to obtain PA6 / PA66 binary copolymer material. The mass ratio of the flow aid and antioxidant to the total material is 0.003 :1.

Embodiment 3

[0044] A preparation method of PA6 / PA66 binary copolymer material, comprising the following preparation steps:

[0045] (1) Mix caprolactam and hexamethylenediamine adipate in a pulverizer at a mass ratio of 6:4 and add them into the reactor;

[0046] (2) Vacuumize and fill the reactor with nitrogen for 3 times to remove the air in the reactor, close the reactor, raise the temperature to 200°C, keep it warm for 2 hours, then raise the temperature to 250°C and react for 1.5 hours, after the reaction is completed, put the reaction product into water to cool;

[0047] (3) The reaction product is pulverized by grinding, and the powder material with a particle size of 50 μm is screened out;

[0048] (4) After drying the powder material obtained in step 3, add flow aid and antioxidant and mix evenly to obtain PA6 / PA66 binary copolymer material. The mass ratio of the flow aid and antioxidant to the total material is 0.005 :1.

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Abstract

The invention relates to the technical field of nylon material preparation and particularly relates to a PA6 / PA66 binary copolymer material and a preparation method thereof. The PA6 / PA66 binary copolymer material is prepared by the following steps: melting and copolymerizing caprolactam and hexanediamine adipate in a mass ratio of (6-9) to (4-1); and grinding and screening to obtain the PA6 / PA66 binary copolymer material. A product obtained by SLS processing of the PA6 / PA66 binary copolymer material provided by the invention has the advantages of excellent performance, low sintering temperature, low cost and high repeated utilization rate; and moreover, the preparation technology is simple, the preparation cost is low, and the production is stable.

Description

technical field [0001] The invention relates to the technical field of nylon material preparation, in particular to a PA6 / PA66 binary copolymer material and a preparation method thereof. Background technique [0002] Selective Laser Sintering (SLS) is one of the fastest-growing rapid prototyping technologies in recent years. It uses solid powder as raw material and uses laser to scan the cross-section of a three-dimensional entity layer by layer to complete prototype manufacturing. Limited by the complexity of the shape of the parts, it can accurately and quickly restore the design concept, quickly produce functional test pieces of new products, and produce complex parts in small batches, breaking through the limitations of traditional manufacturing technology. [0003] Theoretically, any powder of crystalline or semi-crystalline material can be used as SLS sintered material, and a wide range of materials is one of the important factors for the SLS process to be widely used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/36
CPCC08G69/36
Inventor 刘映坚傅轶洪浩然黄志轩
Owner GUANGDONG SILVER AGE SCI & TECH CO LTD
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