A kind of homogeneously modified recycled nylon containing fused ring structure crosslinking agent and its preparation method

Abstract

A homogeneously modified recycled nylon containing a fused ring structure crosslinking agent and a preparation method thereof, relating to a recycled nylon and a preparation method thereof. The specific modification method of the present invention is: firstly, the recycled nylon is heated at 80°C Blast drying for 3 to 4 hours, and the micro-crosslinked masterbatch prepared by melting, mixing, extruding and granulating the condensed ring structure crosslinking agent and the dried recovered nylon, initiator, catalyst, antioxidant, water producing agent, etc. Put it into a universal pulverizer and then put it into a planetary ball mill to grind until the particle size of the micro-crosslinked masterbatch reaches 10-50 μm, and then mix the dried recycled nylon, micro-crosslinked masterbatch, toughener and inorganic The filler is put into a high mixer and mixed for 4-6 minutes, and finally extruded and granulated with a twin-screw extruder at 180°C-240°C to obtain regenerated nylon with isomeric structure. The invention realizes the effect of recovering nylon with mechanical properties such as toughening and strengthening, so that the performance of the recycled material is very good, and has great market promotion value.

Description

technical field [0001] The invention relates to a recycled nylon and a preparation method thereof, in particular to a homogeneously isomerized modified recycled nylon containing a condensed ring structure crosslinking agent and a preparation method thereof. Background technique [0002] Polyamide fiber is commonly known as nylon (Nylon). Nylon is widely used in end consumer products. It is a crystalline polymer. There are strong hydrogen bonds between the amide groups on its molecular chain, and its crystallinity and melting point are high. It has excellent However, due to the aging effect of waste nylon resin, its mechanical properties, especially impact resistance, are far inferior to those of new nylon materials. [0003] With the shortage of petroleum resources and the increasingly serious environmental protection, the market competition is extremely fierce, and the application of recycled nylon resin is gradually increasing. Many nylon product manufacturers have begun t...

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Problems solved by technology

[0002] Polyamide fiber is commonly known as nylon (Nylon). Nylon is widely used in end consumer products. It is a crystalline polymer. There are strong hydrogen bonds between the amide groups on its molecular chain, and its crystallinity and melting point are high. It has excellent However, due to the aging effect of waste nylon resin, its mechanical properties, especially impact resistance, are far inferior to those of new nylon materials.

[0003] With the shortage of petroleum resources and the increasingly serious environmental protection, the market competition is extremely fierce, and the application of recycled nylon resin is gradually increasing. Many nylon product manufacturers have begun to use recycled nylon materials to reduce costs. However, due to the aging effect of recycled nylon resin, its mechanical properties The performance, especially the impact resistance, is far inferior to that of new nylon materials, and it needs to be modified before it can be reused. Therefore, we need a new type of technical means and a crosslinking agent with excellent performance to efficiently modify and recycle waste nylon.

[0004] The invention patent application with the Chinese patent publication number CN105219074A uses the homogeneous cross-linking method to strengthen and toughen recycled nylon, and the cross-linking agent used is vinyltrimethoxysilane. Modification of plastic materials with high linking temperature has poor heat resistance and low activity at high temperatures. It is applied to the crosslinking of plastics with high melting point such as nylon, because the reaction temperature of the crosslinking agent is different from the melting temperature of nylon. Not in the same temperature range, so the crosslinking effect will be unsatisfactory, so we need a crosslinking agent with a higher crosslinking temperature to improve the deficiency of this preparation method, and further break through the high melting temperature of the material or the activity of the crosslinking agent at high temperature. too low to use restrictions

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