Efficient enhanced flame-retardant heat-conducting shading multifunctional master batch for nylon direct injection molding and preparation method thereof

Abstract

The invention belongs to the technical field of plastic modification and processing and especially relates to an efficient enhanced flame-retardant heat-conducting shading multifunctional master batchdirectly used for nylon direct injection molding and a preparation method thereof. The multifunctional master batch is composed of a master batch A and a master batch B, wherein the master batch A comprises the following components by weight percent: 50.0-60.0wt.% of glass fiber, 25.0-35.0wt.% of high-flow nylon resin, 5.0-10.0wt.% of maleic anhydride grafted ionomer, 3.0-8.0wt.% of star-shaped nylon 6 resin and 0.1-0.3wt.% of antioxidant. Compared with the traditional plastic functional master batch, the multifunctional master batch prepared according to the invention has the advantages thatmodified efficiency loss caused by mutual shearing abrasion of glass fiber and fire retardant as well as inorganic functional modified additive grains during the processing process can be avoided; the problem of mismatching processing temperatures of the two modified systems can be solved; compared with modified efficiency of a traditional enhanced bromine flame-retardant system, modified efficiency of the two modified systems is obviously promoted; the master batch has the characteristics of easiness in dispersing and processing and can be used for injection molding after direct simple mixing with nylon 6 resin at ratio.

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, heat-conducting, and light-shielding multifunctional masterbatch that can be directly applied to injection molding of nylon resin 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 f...

AI Technical Summary

Problems solved by technology

The following technical advantages can be obtained by using the method of processing the two masterbatches separately: ① avoiding the 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 avoiding the The length-to-diameter ratio of fibers caused by mutual shearing and abrasion between the inorganic flame retardant synergist (such as antimony trioxide or zinc borate), heat conduction agent and opacifier is greatly reduced; ③ solves the problem of glass fiber reinforced nylon resin and bromine– Antimony compounded flame-retardant nylon, heat-conducting nylon, and light-shielding nylon are difficult to match with the melt blending processing temperature; ④ Maleic anhydride grafted elastic ionomers are used as the carrier components of A and B masterbatches, and the The reactive end group can have the greatest chance of contact with the end group of nylon resin in the environment without the interference of flame retardant powder, maximize its toughening effect, and improve the interfacial bonding between organic and inorganic components in the formula At the same time, it also improves the fluidity of the compound melt, improves the surface finish and anti-deformation ability of the product

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