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Method for preparing nylon powder by employing DMF

A technology of nylon powder and nylon, which is applied in the field of preparing nylon powder by using DMF, which can solve the problems of not being able to prepare high-melting point nylon powder, and achieve the effects of narrow particle size distribution, convenient procurement, and large specific surface area

Inactive Publication Date: 2008-04-09
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcoming that alcohols can not be used as solvents to prepare high-melting nylon powders, the purpose of the present invention is to provide a simple, feasible and easy-to-implement method for preparing nylon powders using DMF

Method used

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  • Method for preparing nylon powder by employing DMF
  • Method for preparing nylon powder by employing DMF

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Be by weight ratio by nylon resin and DMF solvent: nylon resin: the ratio of DMF solvent=1: 3, add nylon 6 and DMF in the autoclave, stir while heating, be heated to 170 ℃, pressure is 1.0MPa, keep Press for 2 hours, stop heating, cool, discharge, dry under vacuum (-0.09MPa) temperature ≤ 90°C, recover solvent to prepare nylon 6 powder with volume average particle size of 90.2μm.

Embodiment 2

[0023] According to nylon resin and DMF solvent by weight ratio: nylon resin: the ratio of DMF solvent=1: 10, nylon 66 and DMF are added in the autoclave, stir while heating, be heated to 220 ℃, pressure is 1.1MPa, keep Press for 2.5 hours, stop heating, cool, discharge, and dry with hot air under normal pressure at a temperature of ≤70°C. Recover the solvent to obtain nylon 66 powder with a volume average particle size of 109.3 μm.

Embodiment 3

[0025] According to the weight ratio of nylon resin and DMF solvent: nylon resin: DMF solvent = 1: 20, add nylon 610 and DMF into the autoclave, stir while heating, heat to 220 ° C, and the pressure is 0.9 MPa at this time , keep the pressure for 1.8 hours, stop heating, cool, discharge, dry with hot air under normal pressure, and dry at a temperature ≤ 70°C, recover the solvent to prepare nylon 610 powder with a volume average particle size of 215.0 μm.

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Abstract

The present invention discloses a preparation method of nylon powder by making use of DMF. The method is that nylon resin is dissolved in the N-dimethylformamide (DMF) solvent, so as to prepare the nylon powder by high temperature, pressure keeping, cooling and drying, the high temperature is controlled at 145DEG C to 290DEG C, the pressure is 0.7 to 1.5MPa; the preparation method of the nylon powder which is provided by the present invention has simple equipment, the preparation process is easy to be operated, the purchase of the solvent is convenient, and the solvent can be recovered and utilized, the particle size of the obtained nylon powder product can be modulated, the granule is spherical approximately, the powder liquidity is good, and the specific surface area is large. The obtained various nylon powders according to the present invention can be used as the nucleating agents of polymer, coating powder of electrostatic spraying technology, powder for magnetic materials and so on.

Description

Technical field: [0001] The invention relates to a preparation method of a nylon resin product, in particular to a method for preparing nylon powder by utilizing DMF. Background technique: [0002] Nylon powder is a kind of thermoplastic powder, which has the advantages of wide working temperature, good impact resistance, electrical insulation physical properties, self-lubrication, good wear resistance, and small friction coefficient. Used as a coating, it has good processability, can be machined after coating, has low water absorption, high dimensional stability and excellent melt fluidity. High melting point nylon powder, such as nylon 46, can be used as a nucleating agent for other high polymers. It can be evenly dispersed in polymer resins in the form of fine particles, which promotes perfect crystallization to achieve high temperature demoulding, and reduces shrinkage of products. Increase the dimensional stability and mechanical strength of the product, shorten the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/12C08L77/00C08K5/20
Inventor 何素芹李中原刘文涛朱诚身许书珍吴刘锁李宏鹏
Owner ZHENGZHOU UNIV
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