High-temperature-resistant aromatic nylon 56 and preparation method thereof

Abstract

The invention discloses high-temperature-resistant aromatic nylon 56 and a preparation method thereof. The high-temperature-resistant aromatic nylon 56 comprises 55-65% of PA56 resin, 0.2-0.5% of a coupling agent, 2-5% of a toughening agent, 15-18% of a heat-resisting agent, 5-8% of a heat stabilizer, 0.5-0.9% of mica powder, 0.8-1.1% of a lubricating agent, 0.2-0.5% of a demolding agent, 0.3-0.6%of an antioxidant, 4-7% of aromatics and 3-8% of glass fibers. The preparation method comprises the following steps: mixing the PA56 resin with the coupling agent, the toughening agent, the heat-resisting agent, the heat stabilizer, the lubricating agent, the demolding agent, the antioxidant and the glass fibers for 3 minutes in a high mixing machine, fully stirring the various components, and mixing the components uniformly; and adding the raw materials which are mixed uniformly in a reaction kettle, smelting the raw materials into melt at the temperature of 260-270 DEG C, then adding the mica powder in the melt in the reaction kettle for 5-10 minutes, keeping adding the aromatics in the reaction kettle and stirring for 5 minutes to form mixed liquor, adding the mixed liquor in a double-screw extruder which is pretreated in advance and then carrying out extrusion forming.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a high-temperature-resistant aromatic nylon 56 and a preparation method thereof. Background technique [0002] PA56 is a new type of bio-based nylon independently developed by my country in the past two years, and it has been put into production in Shandong. PA56 is formed by polycondensation of pentamethylenediamine and adipic acid, and pentamethylenediamine can be extracted from natural organisms. Nylon 56 has a melting point of 254.1°C, and its temperature resistance is comparable to that of PA66. Its molecular weight is smaller than that of conventional nylon, and its degree of polymerization is more concentrated, but its molecular arrangement is more regular and its crystallinity is slightly higher. However, its glass transition temperature, strength, softness, hygroscopicity, The resilience is better than nylon 6 and nylon 66, and it can completely replace nylon 66 in the...

AI Technical Summary

Problems solved by technology

Nylon 56 has a melting point of 254.1°C, and its temperature resistance is comparable to that of PA66. Its molecular weight is smaller than that of conventional nylon, and its degree of polymerization is more concentrated, but its molecular arrangement is more regular and its crystallinity is slightly higher. However, its glass transition temperature, strength, softness, hygroscopicity, The resilience is better than nylon 6 and nylon 66, and it can completely replace nylon 66 in the fields of automobiles, textiles, machinery, electronic appliances, etc. It has broad application prospects, but nylon 56 is still invariable when encountering high temperatures, and there is a danger of melting The organic solvent is melted out, causing pollution, and its own smell is unpleasant, and it will bring discomfort to users when used in a confined space. Therefore, we propose a high-temperature-resistant aromatic nylon 56 and its preparation method to solve the above problems