Method for preparing nylon in lightweight

A lightweight, nylon technology, applied in the manufacturing field of lightweight composite materials, can solve the problems of difficult combination of nylon-6 and affect the mechanical properties of the material, and achieve the effect of maintaining mechanical properties, reducing density, and having a white and bright appearance.

Inactive Publication Date: 2006-07-05
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, there is also a key problem, that is, it is difficult to combine the surface of glass beads with the matrix nylon-6, which significantly affects the mechanical properties of the material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Weigh a certain amount of glass beads, add 1.5% silane coupling agent KH550 (γ-aminopropyltriethoxysilane), mix in a high-speed mixer, control the temperature at 65°C, and mix for 15 minutes ;

[0027] (2) Put the material into a vacuum drying oven at a constant temperature of 70°C for 24 hours;

[0028] (3) 1.5 kilograms of molten caprolactam monomers, 0.1 kilograms of glass beads treated in step (1) and 5 grams of dibutyl phosphite were stirred for 0.5 hours under nitrogen protection at 80° C.;

[0029] (4) Under the vacuum of 500ppm in air density, control the temperature and vacuumize at 130°C for 25 minutes to obtain a mixture with a slight water content, add 6% sodium lactam, 1.0% TDI (toluene diisocyanate), and mix the mixture Cast into the mold, the mold temperature is controlled at 180°C, and the reaction takes about 20 minutes to demould. The density and mechanical properties of the product are shown in attached table 2.

Embodiment 2

[0031] (1) Weigh a certain amount of glass beads, add 1.5% silane coupling agent vinyltriethoxysilane, mix in a high-speed mixer, control the temperature at 65°C, and mix for 15 minutes;

[0032] (2) Put the material into a vacuum drying oven at a constant temperature of 70°C for 24 hours;

[0033] (3) with 1 kilogram of melting caprolactam monomer, 0.15 kilograms of step (1) processed glass microspheres and 5 grams of N, N'-two (1,4-dimethylpentyl) p-phenylenediamine, in Stirring at 80°C for 0.5 hours under nitrogen protection;

[0034] (4) Under the vacuum of 500ppm in air density, control the temperature and vacuumize at 130°C for 25 minutes to obtain a mixture with a slight water content, add 6% sodium lactam, 1.0% TDI (toluene diisocyanate), and mix the mixture Cast into the mold, the mold temperature is controlled at 180°C, and the reaction takes about 20 minutes to demould. The density and mechanical properties of the product are shown in attached table 2.

Embodiment 3

[0036] (1) Weigh a certain amount of glass beads, add 1.5% silane coupling agent vinyltriethoxysilane, mix in a high-speed mixer, control the temperature at 65°C, and mix for 15 minutes;

[0037] (2) Put the material into a vacuum drying oven at a constant temperature of 70°C for 24 hours;

[0038] (3) 1 kg of molten caprolactam monomer, 0.1 kg of glass beads treated in step (1) and 5 g of dibutyl phosphite were stirred for 0.5 hour at 80° C. under nitrogen protection;

[0039] (4) Under the vacuum of 500ppm in air density, control the temperature and vacuumize at 130°C for 25 minutes to obtain a mixture with a slight water content, add 5% sodium lactam, 1.0% TDI (toluene diisocyanate), and mix the mixture Cast into the mold, the mold temperature is controlled at 180°C, and the reaction takes about 20 minutes to demould. The density and mechanical properties of the product are shown in attached table 2.

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Abstract

This invention discloses a process for preparing a lightweight nylon, wherein a lightweight or hollow inorganic material, after surface treatment with the silane coupling agent, is mixed withªŠ-hexanolactam and then cast to prepare a lightweight nylon-6. The density of the lightweight nylon is much lower while its mechanical properties are reserved. Besides, the product appears white and bright, and can be widely used in the decoration area as a heat-resisting material. This invention provides a simple process for preparing a lightweight nylon with reduced production cost.

Description

technical field [0001] The invention relates to a manufacturing method of lightweight nylon-6 resin, in particular to a manufacturing method of a lightweight composite material using low-density hollow glass microspheres as fillers. Background technique [0002] The preparation of lightweight polymer materials is generally realized by polymer foaming technology, such as foamed polyurethane, which has been widely used in packaging, transportation and other industries. However, due to the large pores and many defects of the material, the performance of the material usually decreases greatly and the mechanical properties are poor. The application of lightweight fibers or hollow inorganic-filled polymers can reduce the density of the material while maintaining the mechanical properties of the material, and may provide other special properties. [0003] Nylon-6 has been widely used in the field of engineering plastics due to its excellent properties. But its density is generall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08G69/16C08K9/00
Inventor 刘安栋解廷秀杨桂生
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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