Preparation method for composite material of cast nylon/attapulgite clay

A technology of attapulgite clay and cast nylon, which is applied in the field of preparation of cast nylon/attapulgite clay composite materials, and can solve the problems of not publishing the mechanical properties of composite materials and not mentioning the organic modification of attapulgite clay. , to achieve the effects of convenient metering and adding operations, simple preparation process, enhanced toughness and impact resistance

Inactive Publication Date: 2012-03-28
黄秋环
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent application (publication number CN 101768355A) discloses a method for preparing attapulgite clay/nylon 6 nanocomposites by anion ring-opening method. Dry attapulgite clay is used, ...

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  • Preparation method for composite material of cast nylon/attapulgite clay

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Embodiment 1

[0018] Embodiment 1: prepare composite material according to the following specific steps

[0019] (1) Preparation of dispersion suspension: 800g of purified hexamethylphosphoric triamide, 50g of heat-treated attapulgite clay and 50g of toluene diisocyanate were accurately measured respectively, placed in a stirring reactor, and dry nitrogen was introduced Protect, fully stir, and react at 80°C under normal pressure for 4 hours to obtain a dispersed colloid slurry, cool the dispersed colloid slurry to normal temperature, and store it in a desiccator filled with anhydrous calcium chloride for later use;

[0020] (2) Preparation of concentrated reactive material: Put 1000g caprolactam and 3.0g sodium hydroxide into a stainless steel active material kettle at the same time, depressurize to a pressure below 1.33kPa, react at a temperature of 120°C, distill to remove moisture, and maintain a reduced pressure state After 30 minutes, the concentrated reactive material containing capr...

Embodiment 2

[0023] Embodiment 2: Prepare composite material according to the following specific steps

[0024] (1) Preparation of disperse suspension: that is, Step 1 of Example 1;

[0025] (2) Preparation of concentrated reactive material: put 1000g caprolactam and 4.5g sodium hydroxide into a stainless steel active material kettle at the same time, decompress to a pressure below 1.33kPa, react at a temperature of 128°C, distill to remove moisture, and maintain a reduced pressure state After 30 minutes, the concentrated reactive material containing caprolactam sodium salt was obtained, the vacuum was released, dry nitrogen was introduced to normal pressure, and the temperature of the concentrated reactive material was kept at 165°C;

[0026] (3) Preparation of functional composite material: Put 2000g caprolactam into a stainless steel batching kettle, depressurize to a pressure below 1.33kPa, distill and remove moisture at a temperature of 128°C, maintain a decompressed state for 20min, ...

Embodiment 3

[0028] Embodiment 3: prepare composite material according to the following specific steps

[0029] (1) Preparation of disperse suspension: that is, Step 1 of Example 1;

[0030] (2) Preparation of concentrated reactive material: Put 1000g caprolactam and 6.0g sodium hydroxide into a stainless steel active material kettle at the same time, reduce the pressure to a pressure below 1.33kPa, react at a temperature of 135°C, distill to remove moisture, and maintain a reduced pressure state After 30 minutes, the concentrated reactive material containing caprolactam sodium salt was obtained, the vacuum was released, dry nitrogen was introduced to normal pressure, and the temperature of the concentrated reactive material was kept at 170°C;

[0031] (3) Preparation of functional composite material: Put 2000g caprolactam into a stainless steel batching kettle, depressurize to a pressure below 1.33kPa, distill and remove moisture at a temperature of 135°C, maintain a decompressed state fo...

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Abstract

The invention discloses a preparation method for a composite material of cast nylon/attapulgite clay. The preparation method includes the steps as follows: firstly, preparing suspension colloid by hexamethylphosphoric triamide, attapulgite clay and toluene diisocynate in given proportion; adding the suspension colloid as a function modifier of the cast nylon in caprolactam polymerization monomer;and taking sodium hydroxide-toluene diisocynate as a catalyzing-activating system and triggering caprolactam anionic ring-opening polymerization, and finishing polymerization in a mould at normal pressure and simultaneously moulding. The preparation technology is simple and high efficient and has an industrial practical value; and for the prepared composite material of cast nylon/attapulgite clay, on the basis that the high stretching strength of the common cast nylon is kept, the toughness and the impact resistance are effectively reinforced, and the prepared composite material can meet the using requirements of substituting for non-ferrous metal and alloy steel to manufacture mechanical parts in multiple industrial fields.

Description

technical field [0001] The invention relates to a method for preparing a cast nylon / attapulgite clay composite material, in particular to a method for preparing a cast nylon / attapulgite clay composite material by catalytically activated anion ring-opening polymerization. Background technique [0002] The cast nylon developed and manufactured on the basis of catalytically activated anionic ring-opening polymerization has a simple production process, and the mechanical strength of the casting is better than that of hydrolyzed ring-opening polycondensation nylon, which can partially replace non-ferrous metals and alloy steels in metallurgy, mining, transportation, transportation and other fields Manufacture wear-resistant mechanical parts such as sliders, bushings, bearing bushes, rollers, pulleys, cams, guide wheels, etc. [0003] Polymer-based clay composites are currently a research hotspot, which not only helps to improve the material properties of polymers, but also expand...

Claims

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Application Information

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IPC IPC(8): C08G69/18C08K9/00C08K3/34C08L77/02
Inventor 程晓春金叶玲吴洁冯良东徐海青谭立强朱小红李爱平
Owner 黄秋环
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