Cold-resistant super-tough reinforced nylon 6 material for automobiles and preparation method thereof

A nylon and cold-resistant technology, which is applied in the field of polymer material modification, can solve problems such as difficulty in maintaining rigidity and poor interface compatibility, and achieve the effects of enhanced toughness, improved rigidity, and good cold resistance

Active Publication Date: 2013-12-04
NINGBO NENGZHIGUANG NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method takes into account the advantages of the composite modification of the toughening agent, it ignores the interfacial bonding between the glass fiber, nylon 6 and the toughening agent, resulting in poor interfacial compatibility of the entire system, resulting in improved toughness. Rigidity is difficult to maintain

Method used

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  • Cold-resistant super-tough reinforced nylon 6 material for automobiles and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Fully mix the polyolefin resin and grafted comonomer in the high mixer (stir in the high mixer for 6~10 minutes, the stirring speed is 200~800 rpm), send the mixed raw materials to Melt extrusion of twin-screw extruder. After 0.5~5 minutes of normal extrusion, add 7 strands of glass fiber (commercially available long glass fiber) into the side feed port of twin-screw extruder (accurately calculated according to the speed, 7 strands Exactly 30 parts by weight), the glass fiber is melted and blended with the melt, extruded and granulated, and dried to obtain the modified precursor; the extrusion process of the twin-screw extruder is: the screw speed is 300 rpm, each zone The heating temperature is: 140°C in the first zone, 150°C in the second zone, 165°C in the third zone, 175°C in the fourth zone, 175°C in the fifth zone, 180°C in the sixth zone, 190°C in the seventh zone, and 190°C in the eighth zone.

[0028] The composition of the modified precursor: 50 parts of p...

Embodiment 2

[0033] (1) Fully mix the polyolefin resin and grafted comonomer in the high mixer (stir in the high mixer for 6~10 minutes, the stirring speed is 200~800 rpm), send the mixed raw materials to Melt extrusion of twin-screw extruder. After 0.5~5 minutes of normal extrusion, add 10 strands of glass fiber (commercially available long glass fiber) into the side feeding port of twin-screw extruder (accurately calculated according to the speed, 10 strands Exactly 50 parts by weight), the glass fiber is extruded and granulated after being melted and blended with the melt, and dried to obtain the modified precursor; the extrusion process of the twin-screw extruder is: the screw speed is 350 rpm, each zone The heating temperature is: 140°C in the first zone, 145°C in the second zone, 160°C in the third zone, 170°C in the fourth zone, 170°C in the fifth zone, 175°C in the sixth zone, 180°C in the seventh zone, and 180°C in the eighth zone.

[0034] The composition of the modified precurso...

Embodiment 3

[0039] (1) Fully mix the polyolefin resin and grafted comonomer in the high mixer (stir in the high mixer for 6~10 minutes, the stirring speed is 200~800 rpm), send the mixed raw materials to The twin-screw extruder is melted (forming a toughened melt) and extruded. After 0.5 to 5 minutes of normal extrusion, add 9 strands of glass fiber (commercially available long glass fiber) into the side feed port of the twin-screw extruder ( Accurately calculated according to the rotational speed, 9 shares are just 40 parts by weight), the glass fiber is melted and blended with the melt, extruded and granulated, and dried to obtain the modified precursor; the extrusion process of the twin-screw extruder is: screw The speed is 360 rpm, and the heating temperature of each zone is: 150°C for zone 1, 160°C for zone 2, 180°C for zone 3, 190°C for zone 4, 200°C for zone 5, 220°C for zone 6, 210°C for zone 7, 210°C for zone 8 .

[0040] The composition of the modified precursor: 40 parts of po...

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Abstract

The invention relates to the technical field of polymer modification and provides a cold-resistant super-tough reinforced nylon 6 material for automobiles and a preparation method thereof. The cold-resistant super-tough reinforced nylon 6 material for automobiles is obtained by mixing 20-90 weight parts of a nylon 6 resin, 10-80 weight parts of a modification precursor, 0.1-0.5 weight parts of an anti-oxidant and 0.1-0.5 weight parts of a lubricant, wherein the modification precursor is obtained by mixing a polyolefin resin, a grafting copolymerization monomer and glass fibers. The polyolefin resin and the grafting copolymerization monomer undergo a reaction for full activation and surfaces of the glass fibers have functionalization and hydrophobization effects. The glass fibers and polyolefin form a candlewick structure so that the interfacial compatibility between a flexibilizer and the glass fibers and between the flexibilizer and the nylon 6 resin are good. Therefore, the cold-resistant super-tough reinforced nylon 6 material has improved toughness and rigidity.

Description

technical field [0001] The invention relates to the technical field of polymer material modification, in particular to a cold-resistant super-tough reinforced nylon 6 material for automobiles and a preparation method thereof. Background technique [0002] Nylon 6, scientific name polycaprolactam, is a very versatile engineering plastic, with a melting point of 215 ° C ~ 225 ° C, which is lower than nylon 66; in addition, because the crystallinity is lower than nylon 66, it has lower rigidity and greater hygroscopicity , the operating temperature range is -40°C~150°C. Due to the influence of temperature and environment, the performance of ordinary nylon 6 will change greatly, so its application is greatly restricted. Therefore, its comprehensive performance can be significantly improved by modifying its filling. [0003] Modified nylon 6 material can be widely used in industries such as household appliances, electric tools and electrical and electronic connectors. The commo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L51/00C08K7/14B29C47/92B29B9/06B29C48/92
CPCB29B7/90B29B9/14B29C48/40B29C48/92B29C2948/92704B29C2948/92895
Inventor 张发饶吴香发
Owner NINGBO NENGZHIGUANG NEW MATERIALS TECH
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