A high-efficiency enhanced flame-retardant functional masterbatch for nylon 6 direct injection molding and its preparation method

Abstract

The invention belongs to the technical field of plastic modification and processing, and in particular relates to a high-efficiency enhanced flame-retardant functional masterbatch which can be directly applied to injection molding of nylon 6 products and a preparation method thereof; The mass percentage of masterbatch A is as follows: 50.0-70.0 wt.% of glass fiber, 15.0-35.0 wt.% of high-flow nylon 6 resin, 3.0-10.0 wt.% of maleic anhydride grafted ionomer, Star-shaped nylon 6 resin 3.0-6.0 wt.%, antioxidant 0.1-0.3 wt.%; compared with traditional plastic functional masterbatches, the functional masterbatch prepared by the present invention avoids the modification of enhanced halogen-free flame-retardant nylon 6. During the processing of the permanent system, the mutual loss of the modification performance is caused by the mutual shearing and abrasion of the glass fiber and the flame retardant. At the same time, the problem of the mismatching processing temperature of the above two modification systems is solved, and the modification performance of the two is significantly improved; The masterbatch is easy to disperse and process, and can be directly mixed with nylon 6 resin according to the ratio and then injection molded.

Description

technical field [0001] The invention belongs to the technical field of plastic modification and processing, and in particular relates to a high-efficiency enhanced flame-retardant functional master batch which can be directly applied to injection molding processing of nylon 6 products and a preparation method thereof. Background technique [0002] Using twin-screw extruder to implement melt blending is a traditional method for plastic modification. Using the high-efficiency and excellent mixing performance of co-rotating twin-screw extruders, thermoplastics and various modified additives can be continuously melt-blended and extruded After granulation, the prepared modified special material will be used again for injection or extrusion processing to form various products. This technical route not only effectively improves the physical and mechanical properties of plastic products such as strength, toughness, stiffness, creep resistance, and flexure resistance, but also endows...

AI Technical Summary

Problems solved by technology

Using the method of processing the two masterbatches separately can obtain the following technical advantages: ① Avoid direct blending of glass fibers and brominated flame retardants to generate internal friction and heat generation, resulting in the decomposition of halogenated flame retardants; ② Avoid inorganic flame retardants The fiber length-to-diameter ratio between the flame synergist (such as antimony trioxide or zinc borate) and the glass fiber is greatly reduced due to mutual shear wear; 6 The problem of mismatching processing temperature of the two modified systems for melt blending; ④Using the melt pultrusion technology to prepare a reinforced masterbatch with a larger fiber aspect ratio than the traditional chopped glass fiber reinforced masterbatch; ⑤Using maleic anhydride Grafted elastic ionomers are used as the carrier components of A and B masterbatches respectively, and their reactive end groups can have the greatest chance of contacting the end groups of nylon 6 resin in an environment without interference from flame-retardant powders, and maximize their The toughening effect can also improve the interfacial adhesion between the organic and inorganic components in the formula, and at the same time improve the melt fluidity of the compound, improve the surface finish and deformation resistance of the product

Images