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Toughening material for ultra-low temperature resistant injection molding grade nylon and preparation method thereof

An ultra-low temperature, injection molding technology, applied in the field of polymer materials, can solve the problems of nylon cable ties easy stress cracking, poor product dimensional stability, nylon pipes easy to crack, etc., to achieve good low temperature resistance, low density filling, high filling sexual effect

Active Publication Date: 2021-03-23
SHENYANG KETONG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nylon also has obvious disadvantages: poor water absorption, poor dimensional stability of products, poor antistatic force, poor low temperature resistance, etc. Among them, the poor low temperature resistance severely restricts the use of nylon in low temperature environments. usage of
For example, nylon cable ties are prone to stress cracking in low temperature environments; nylon pipes are prone to cracking in low temperature environments, etc.

Method used

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  • Toughening material for ultra-low temperature resistant injection molding grade nylon and preparation method thereof
  • Toughening material for ultra-low temperature resistant injection molding grade nylon and preparation method thereof
  • Toughening material for ultra-low temperature resistant injection molding grade nylon and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The effect of the amount of solid initiator on the toughening agent was studied.

[0025]First, under the condition of 170°C, blend 75 parts of EPDM rubber and 25 parts of ethylene octene copolymer for 5 minutes, add 7 parts of dibenzoyl peroxide, and the reaction time is 7 minutes to obtain EPDM / POE thermoplastic elastic Body; 100 parts of polypropylene, 0.7 parts of maleic anhydride, 0.1 parts of DCP, 0.3 parts of zinc stearate, 0.2 parts of 1010, placed in a high-speed mixer and mixed evenly, the mixing time was set to 5min, and extruded by twin-screw Preparation of KT-1. Extrusion temperature setting: Zone 1 170°C, Zone 2 175°C, Zone 3 180°C, Zone 4 185°C, Zone 5 190°C, Zone 6 190°C, Zone 7 185°C, Zone 8 180°C, Zone 9 175°C , head 190°C; the residence time in each zone is 7 seconds; the rotation speed of the main engine is: 500r / min; KT-1 is prepared; then, take 85 parts of EPDM / POE thermoplastic elastomer, 1.5 parts of maleic anhydride, 2.5 parts of KT- 1. 3 part...

Embodiment 2

[0031] Study on the Effect of Liquid Initiator Amount on Toughener .

[0032] First, under the condition of 170°C, blend 75 parts of EPDM rubber and 25 parts of ethylene octene copolymer for 5 minutes, add 7 parts of dibenzoyl peroxide, and the reaction time is 7 minutes to obtain EPDM / POE thermoplastic elastic Body; 100 parts of polypropylene, 0.9 part of maleic anhydride, 0.3DCP, 0.5 part of zinc stearate, 0.3 part of 1010 were placed in a high-speed mixer and mixed evenly, the mixing time was set at 5min, and KT was prepared by twin-screw extrusion -1. Extrusion temperature setting: Zone 1 170°C, Zone 2 175°C, Zone 3 180°C, Zone 4 185°C, Zone 5 190°C, Zone 6 190°C, Zone 7 185°C, Zone 8 180°C, Zone 9 175°C , head 190°C; the residence time in each zone is 7 seconds; the rotation speed of the main engine is: 500r / min; KT-1 is prepared. Then, take 85 parts of EPDM / POE thermoplastic elastomers, 1.5 parts of maleic anhydride, 2.5 parts of KT-1, 3 parts of carbon nanotubes, 0.2...

experiment example 3

[0038] Study on the effect of the amount of maleic anhydride on the toughening agent .

[0039] First, under the condition of 170°C, blend 75 parts of EPDM rubber and 25 parts of ethylene octene copolymer for 5 minutes, add 7 parts of dibenzoyl peroxide, and the reaction time is 7 minutes to obtain EPDM / POE thermoplastic elastic Body; 100 parts of polypropylene, 0.8 parts of maleic anhydride, 0.25 parts of DCP, 0.35 parts of zinc stearate, and 0.2 parts of 1010 were placed in a high-speed mixer and mixed uniformly. The mixing time was set at 5 minutes, and prepared by twin-screw extrusion KT-1. Extrusion temperature setting: Zone 1 170°C, Zone 2 175°C, Zone 3 180°C, Zone 4 185°C, Zone 5 190°C, Zone 6 190°C, Zone 7 185°C, Zone 8 180°C, Zone 9 175°C , head 190°C; the residence time in each zone is 7 seconds; the rotation speed of the main engine is: 500r / min; KT-1 is prepared. Then, take 85 parts of EPDM / POE thermoplastic elastomer, 2.5 parts of KT-1, 3 parts of carbon nanot...

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Abstract

The invention belongs to the field of polymer materials, and particularly relates to an ultra-low temperature-resistant toughening material for injection molding-grade nylon and a preparation method of the toughening material. Raw materials of the ultra-low temperature-resistant toughening material comprise: in parts by weight, 70-80 parts of ethylene-propylene-diene monomer rubber, 20-30 parts ofethylene-octene copolymer, 5-10 parts of dibenzoyl peroxide, 0.5-2 parts of maleic anhydride, 1-5 parts of KT-1, 1-5 parts of carbon nanotubes, 0.05-0.3 part of solid initiator, 0.05-0.3 part of liquid initiator, 0.1-0.5 part of thermal stabilizer, 0.1-0.3 part of antioxidant and 10-20 parts of nylon 6. The prepared nylon toughening agent belongs to injection molding-grade toughening agents, anda step of reaction-extrusion of nylon toughened by a toughening agent is omitted, so that the production cost is saved effectively; secondly, the toughening material can be used in an environment withan ambient temperature of 50 DEG C below zero, so that low-temperature resistance of the toughened nylon is improved effectively, and the notched impact strength of the toughened nylon is improved.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a toughening material for ultra-low temperature resistant injection molding grade nylon and a preparation method thereof. Background technique [0002] Nylon resin was the first resin developed by DuPont for the preparation of fibers. It was mass-produced in 1939; in the 1950s, it began to develop and produce injection-molded products to replace metals to meet the requirements of lightweight and cost-reducing downstream industrial products. Nylon itself has high mechanical strength, good toughness, outstanding fatigue resistance, good corrosion resistance and aging resistance, and the prepared samples have the advantages of light weight, easy dyeing, and easy molding; therefore, nylon is widely used to replace copper And other metals are used in machinery, chemical industry, instrumentation, automobile and other industries to manufacture bearings, gears, pump blades a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L23/08C08L51/06C08L77/02C08K13/04C08K5/14C08K5/098C08K5/134C08K7/24C08K5/20B29B9/06B29C48/92B29C45/78B29C45/77
CPCB29B9/065B29C45/77B29C45/78B29C2945/76498B29C2945/76531B29C48/92B29C2948/9259B29C2948/92704B29C2948/92904C08K2201/011C08L23/16C08L2201/08C08L2205/035C08L23/0815C08L51/06C08L77/02C08K13/04C08K5/14C08K5/098C08K5/1345C08K7/24C08K5/20
Inventor 吕通建
Owner SHENYANG KETONG PLASTIC
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