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Low melting point nylon 6 and preparation method thereof

A low melting point, nylon technology, applied in the field of low melting point nylon 6 and its melt extrusion modification, can solve the problems of complex process, difficult industrialization, high production cost, and achieve simple method, low production cost and easy operation. Effect

Inactive Publication Date: 2009-04-29
贵州省复合改性聚合物材料工程技术研究中心
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the solution method can reduce the melting point of nylon 6 and prepare nylon 6 with low melting point, due to the high production cost and complicated process, it is limited to laboratory preparation and it is difficult to realize industrialization.

Method used

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  • Low melting point nylon 6 and preparation method thereof

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Embodiment Construction

[0013] The preferred embodiment of the present invention: calcium chloride is dried in a vacuum dryer at 120 ° C for 10 hours, then pulverized and refined with a high-speed mixer, and weighed according to the weight ratio of ordinary nylon 695Kg, calcium chloride 5Kg, catalyst ferric chloride 0.03Kg and processing aid glycerol 0.15Kg, mix ordinary nylon 6 particles, calcium chloride, ferric chloride and glycerol uniformly, and extrude them in a twin-screw extruder according to the method of polymer processing and molding And granulation to obtain low-melting nylon 6, wherein the screw temperature of the twin-screw extruder is 200-270 DEG C, and the screw speed is 160-240 rpm. Within the scope of the above formula and process, the optimization process of different ratio systems is different. Table 1 shows the performance index of the typical low melting point nylon 6 obtained by the optimization process experiment.

[0014] Table 1 Performance index of typical low melting point...

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Abstract

The invention discloses nylon 6 with low melting point and a preparation method thereof. The nylon 6 with low melting point is prepared from 92 to 98 portions of common nylon 6, 2 to 8 portions of calcium chloride, 0.01 to 0.03 portion of catalyst and 0.1 to 0.2 portion of processing addition agent as calculated by weight portion. The raw materials are uniformly mixed in proportion, and are subjected to extrusion molding in a double-screw extruder by the polymer shaping method and granulation to obtain the nylon 6 with low melting point, wherein the temperature of screws of the double-screw extruder is between 240 and 270 DEG C, and the rotary speed of the screws of the double-screw extruder is between 160 and 180 revolutions per minute. The calcium chloride is adopted to perform complexing modification on the common nylon 6, so as to reduce the cost of the raw materials; the prepared nylon 6 with low melting point is close to like products of Du Pont Company in the aspects of processing fluidity, mechanical performance and so on, and can be mixed with polymers with low processing temperature such as PVC; and the method is simple, easy to operate, and is particularly suitable to be promoted and applied in industries.

Description

technical field [0001] The invention relates to a low-melting nylon 6 and a preparation method thereof, in particular to a low-melting nylon 6 prepared by complex-modifying common nylon 6 through metal chloride melt extrusion and a melt extrusion modification method thereof. Background technique [0002] Nylon 6 (PA6) has a series of excellent properties such as high mechanical strength, good toughness, good electrical properties, wear resistance, oil resistance, weak acid and alkali resistance, etc. It is a widely used engineering plastic. PA6 can not only be used as a matrix resin, but also modified with polyolefins, rubber elastomers, inorganic rigid particles and other engineering plastics such as polyether, polyester, polyimide, etc., so that it has high impact resistance, low water absorption and It has good processing properties and can also be used as the second component of polymer alloys to toughen and strengthen other polymers such as polypropylene and polycarbona...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K3/16B29C47/40B29C47/92B29C48/40B29C48/92
CPCB29C48/92B29C2948/92704B29C48/04B29C48/40B29C2948/9259B29C2948/92885B29C2948/92895
Inventor 于杰洪升钱志军鲁圣军何敏
Owner 贵州省复合改性聚合物材料工程技术研究中心
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