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Copolymerized nylon product and preparation method thereof

A technology for copolymerizing nylon and products, applied in the field of nylon products, can solve the problems of not meeting application conditions, affecting the appearance of products, uneven flow, etc., and achieving the effect of not affecting mechanical properties, reducing the probability of agglomeration, and ensuring dispersibility

Active Publication Date: 2019-02-19
辰东意普万新材料(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the continuous improvement of the industrial level, the high performance of engineering plastics has gradually become the mainstream of the times, although nylon plus glass fiber has replaced some metal materials with its excellent mechanical properties, and the glass fiber content of glass fiber reinforced nylon materials on the market Generally, it is controlled at 10-45wt.%, because when the glass fiber content exceeds 50wt.%, it will be unevenly dispersed in nylon, and it will flow unevenly during processing. The density of glass fiber is too high, making the glass fiber exposed. Affect the appearance of the product, and the phenomenon of broken strips will occur in severe cases
However, the mechanical properties that can be increased by the content of 10-45wt.% glass fiber are limited, and it still cannot meet the application conditions of some fields that require high strength.

Method used

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  • Copolymerized nylon product and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of copolymerized nylon product, its preparation raw material comprises the following components by mass percentage:

[0038] polymerized nylon 48.5%;

[0039] Glass fiber 50%;

[0040] lubricant 1%;

[0041] Heat stabilizer 0.5%;

[0042] The polymerized nylon is obtained by condensation of hexamethylenediamine, isophthalic acid and nylon 66 salt, the glass fiber is alkali-free short glass fiber, the lubricant is polyamide wax, and the heat stabilizer is cuprous iodide.

[0043] The preparation method of this copolymerized nylon product is:

[0044] 1) Under a nitrogen atmosphere, the hexamethylenediamine and isophthalic acid of equimolar ratio, and the nylon 66 salt that accounts for 50% of the mass sum of hexamethylenediamine and isophthalic acid are dissolved in water in proportion, and the temperature is raised to 150°C, react for 3 hours, until the reaction liquid becomes a clear or uniform suspension solution, transfer the solution to the polymerization...

Embodiment 2

[0049] A kind of copolymerized nylon product, its preparation raw material comprises the following components by mass percentage:

[0050] polymerized nylon 38.3%;

[0051] Glass fiber 60%;

[0052] Lubricant 1.2%;

[0053] Heat stabilizer 0.5%;

[0054] The polymerized nylon is obtained by condensation of hexamethylenediamine, isophthalic acid and nylon 66 salt, the glass fiber is alkali-free short glass fiber, the lubricant is polyamide wax, and the heat stabilizer is cuprous iodide.

[0055] The preparation method of this copolymerized nylon product is:

[0056] 1) Under a nitrogen atmosphere, dissolve hexamethylenediamine and isophthalic acid in an equimolar ratio, and nylon 66 salt that accounts for 50% of the mass sum of hexamethylenediamine and isophthalic acid in water, and heat up To 150°C, react for 3 hours, until the reaction liquid becomes a clear or uniform suspension solution, transfer the solution to the polymerization kettle, continue to stir and heat up, w...

Embodiment 3

[0061] A kind of copolymerized nylon product, its preparation raw material comprises the following components by mass percentage:

[0062] polymerized nylon 48.5%;

[0063] Glass fiber 50%;

[0064] lubricant 1%;

[0065] Heat stabilizer 0.5%;

[0066] The polymerized nylon is obtained by condensation of butanediamine, terephthalic acid and caprolactam, the glass fiber is alkali-free short glass fiber, the lubricant is TAF, and the heat stabilizer is phenolic antioxidant.

[0067] The preparation method of this copolymerized nylon product is:

[0068] 1) Under a nitrogen atmosphere, dissolve butanediamine and terephthalic acid in an equimolar ratio, and caprolactam accounting for 75% of the mass of butanediamine and terephthalic acid in water in proportion, and heat up to 100°C , react for 4 hours, until the reaction solution becomes a clear or uniform suspension solution, transfer the solution to the polymerization kettle, continue to stir and heat up, until the temperatu...

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Abstract

The invention provides a copolymerized nylon product. The copolymerized nylon product comprises, by mass, 30-50% of polymerized nylon, 50-70% of glass fiber and 0-10% of calcium sulfate whiskers. Thepolymerized nylon is obtained by concentrating aliphatic diamine and aromatic dibasic acid and then polymerizing with nylon 66 salt or caprolactam. The copolymerized nylon product has the advantages that by adding 50-70% of the high-content glass fiber into the polymer nylon, the manufactured nylon product is enabled to be higher in mechanical strength, the polymerized nylon is obtained by concentrating the aliphatic diamine and the aromatic dibasic acid into a midbody, intermolecular movement can be limited by introducing benzene rings in the aromatic dibasic acid, a melting point and melt strength of a polymer can be reduced by polymerization with the nylon 66 salt or the caprolactam, mobility of the polymerized nylon is improved, dispersity of the high-content glass fiber in the polymerized nylon can be increased, and the copolymerized nylon product is enabled to have good surface smoothness. The invention further provides a preparation method of the copolymerized nylon product.

Description

technical field [0001] The invention relates to nylon products, in particular to a copolymerized nylon product and a preparation method thereof. Background technique [0002] Polyamide (PA, commonly known as nylon) has excellent mechanical properties, good lubricity and friction resistance, high melting point, stable to chemical reagents (except strong acid and strong alkali), good heat resistance, electrical insulation and weather resistance, etc. , is the engineering plastic with the largest output and widest application in the world. It is widely used in the fields of automobile industry, electrical and electronic industry, transportation industry, machine manufacturing industry, wire and cable communication industry, packaging and daily necessities. However, due to its temperature sensitivity and high hygroscopicity, it leads to dimensional instability, which limits the application of nylon in some precision electronic appliances. In order to improve nylon's dimensional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L77/06C08K13/06C08K9/06C08K7/14C08K3/16C08G69/36C08G69/26
CPCC08G69/26C08G69/36C08K7/14C08K9/06C08K13/06C08K2201/003C08L77/00C08L77/06C08L2205/02C08L2205/025C08K3/16
Inventor 杨冬蒋国生黄俊辉徐文亮张海春
Owner 辰东意普万新材料(广东)有限公司