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Fast shaping nylon 66 resin and its preparation method

A nylon, rapid technology, applied in the field of rapid prototyping nylon 66 resin and its preparation, can solve problems not involved in rapid prototyping, and achieve the effects of improved physical properties, less pollution, and simple process

Inactive Publication Date: 2007-02-14
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the literature on the modification of nylon 66 at home and abroad focuses on the preparation of high tensile strength, transparent engineering plastics or the improvement of its flame retardancy, antistatic, antibacterial, aging resistance, wear resistance and other properties, but does not involve rapid prototyping aspect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The nylon 66 powder was vacuum-dried at 90° C. for 24 hours to obtain a dry nylon 66 resin.

[0017] Select the mixture of polyamide 46, polyamide 22, polyamide 22 and sodium phenyl hypophosphite, magnesium oxide, talcum powder, calcium fluoride as nucleating agent, according to the weight ratio of 99 parts of nylon 66 and 1 part of nucleating agent, They were mixed with nylon 66 on a high-speed kneader for 5 minutes, dried in vacuum at 90°C for 24 hours, extruded and granulated by a twin-screw extruder, and injection molded into standard test strips.

[0018] The tensile, bending and impact properties of various rapid prototyping nylon 66 were tested, and the results are listed in Table 1. The standards for this table are tensile GB / T1042-92, bending GB / T9341-88 and impact GB / T1843-1996.

[0019]

Embodiment 2

[0021] Add nylon 66 monomer to the polymerization kettle, add 800ppm of nucleating agent of mixture of sodium tert-butyl hypophosphite and polyamide 22 during the polymerization process of nylon 66, and make it disperse evenly under the action of polymerization heat and stirring, after the polymerization is completed Discharging, pelletizing, and then vacuum drying at 80-110°C for 18-24 hours or under N 2 Under protection, dry at 80-110°C for 18-24 hours to obtain the product.

[0022] The tensile, bending and impact properties of the rapid prototyping nylon 66 prepared by the above method were tested, and the results obtained are listed in Table 2. This table is based on the same standard as Table 1.

[0023]

[0024] In Table 2, A represents the mixture of sodium tert-butyl hypophosphite and polyamide 22

Embodiment 3

[0026] Add different contents of nucleating agent A (same as Example 2) in the polymerization process of nylon 66, its contents are respectively 400ppm, 150ppm, 100ppm, 50ppm and 20ppm, and the contents are respectively recorded as 400A, 150A, 100A, 50A and 10A. Vacuum dried at 90°C for 24 hours, and formed into standard test strips.

[0027] The mechanical properties of rapid prototyping nylon 66 with different nucleating agent contents were tested, and the results are listed in Table 3, which is based on the same standards as Table 1.

[0028]

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PUM

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Abstract

The present invention discloses one kind of fast formed nylon-66 resin and its preparation process. The fast formed nylon-66 resin has main material including nylon-66 in 66 100 weight portions, and nucleater in 10-4-1 weight portions. It is prepared through vacuum drying nylon-66 powder and mixing nylon-66 powder and nucleater in a high speed kneading machine. Or, the nucleater is added during polymerizing nylon-66 for well mixing to obtain the fast formed nylon-66 resin. The present invention has simple preparation process suitable for industrial production, and the fast formed nylon-66 resin has short forming period and raised mechanical performance.

Description

Technical field: [0001] The invention belongs to the technical field of new varieties of general plastics and engineering plastics, and in particular relates to a rapid prototyping nylon 66 resin composed of nylon 66 and a nucleating agent and a preparation method thereof. Background technique: [0002] Nylon 66 was successfully developed by Du Pont Company in 1935, industrialized in 1939, and began to be used as engineering plastics in 1956. It is one of the largest and most widely used engineering plastics in the world, and it is also the main nylon product in Henan Province. The superior mechanical properties, wear resistance, self-lubrication and corrosion resistance of nylon 66 make it widely used in automotive parts, mechanical parts, electronic appliances, adhesives and packaging materials and fields. However, nylon 66 still has many deficiencies in the use process, such as long molding cycle, poor mold release performance, unstable size, brittle fracture, poor heat ...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08K3/26C08K5/521B29B7/12B29C47/40C08L71/12C08L27/16C08L77/00
Inventor 何素芹朱诚身吕励耘李宏鹏郜娅刘文涛
Owner ZHENGZHOU UNIV
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