Glassfiber-reinforced hydrolysis-resistant low-warpage nylon 66 composite material and preparation method thereof

Abstract

The invention provides a glassfiber-reinforced hydrolysis-resistant low-warpage nylon 66 composite material and a preparation method thereof. The glassfiber-reinforced hydrolysis-resistant low-warpage nylon 66 composite material comprises the following components in parts by weight: 50-85 parts of nylon 66, 10-40 parts of glassfibers, 2-10 parts of warpage deformation improvers, 0.5-2 parts of hydrolytic and heat stabilizers, 1-4 parts of compatilizers and 1-2 parts of other auxiliary agents, wherein the auxiliary agents are one or a mixture of more of a siloxane coupling agent and an antioxidant or a parting agent. The product has high strength and rigidity, also well solves the problems of easy warpage deformation and great dimension change of the product due to glassfiber addition, has both excellent hydrolytic resistance and temperature tolerance and also has good processability and attractive appearance.

Description

technical field [0001] The invention belongs to the technical field of modified polyamides, and relates to a glass fiber-reinforced hydrolysis-resistant and low-warpage nylon 66 composite material and a preparation method thereof. The composite material is mainly used in automotive water chambers, engine parts, bearings, gears, etc. in the industries of automobiles, machinery, and electrical appliances. Parts that have high requirements on warping deformation and dimensional stability of molded parts. Background technique [0002] Nylon 66 is a widely used engineering plastic, which is formed by condensation polymerization of hexamethylenediamine and adipic acid. Its melting point is 252-265 ° C. Compared with other engineering plastics, it has excellent mechanical properties and better thermal properties, such as high Strength, high modulus, high hardness; relatively high heat distortion temperature, after adding glass fiber reinforcement, the heat distortion temperature c...

AI Technical Summary

Problems solved by technology

Among them, the low-viscosity, high-fluidity nylon 66 base material ensures the overall fluidity and processing type of the material. In addition to providing a certain anti-hydrolysis function, the anti-hydrolysis alkali-free glass fiber has a smaller diameter and is more uniformly dispersed during processing. It has better performance, and an appropriate amount of warpage improvement agent can greatly improve the shortcomings of traditional glass fiber reinforced nylon 66 materials, such as severe warpage and poor dimensional stability, while maintaining the excellent mechanical properties of the material, anti-hydrolysis and heat stabilizer Provide the material with long-term hydrolysis resistance and long-term temperature resistance that are not available in general materials. The compatibilizer effectively improves the bonding between the nylon 66 base material and other components, ensuring the toughness of the material. Other additives have no effect on the material. Excellent processability, mold release, oxidation resistance and good appearance of parts can provide guarantee

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