Micro-foaming polyamide magnetic plastic based on organic fluorine modification and preparation method of micro-foaming polyamide magnetic plastic

Abstract

The invention discloses a micro-foaming polyamide magnetic plastic based on organic fluorine modification and a preparation method, wherein the magnetic plastic is prepared from a basic raw material and an additive raw material, the basic raw material is composed of the following raw material components: PA resin, a CO2-philic additive, phenolic hydroxyl group-containing resin and a filler; the added raw materials comprise the following components: a compatilizer, a nucleating agent, a foaming agent and other auxiliaries, and the CO2-philic additive is added to regulate and control dissolution and diffusion of CO2 in a PA resin matrix, reduce gas escape, improve the utilization rate of the foaming agent and save the material cost; the phenolic hydroxyl-containing resin is added to reduce the water absorption of the PA resin, so that the defects of poor product size stability, poor surface quality, poor foaming effect, reduced mechanical property and the like caused by high water absorption of the PA composite material are overcome; due to the addition of the magnetic powder, the PA plastic is endowed with magnetic performance, so that the PA plastic becomes a novel polymer functional material, and the application range of the micro-foaming PA composite material in the fields of automobiles, electronics, electrics and the like is further expanded.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a micro-foamed polyamide magnetic plastic modified by organic fluorine and a preparation method thereof. Background technique [0002] Polyamide is commonly known as nylon, the English name Polyamide, or PA for short, is the general term for thermoplastic resins containing repeated amide groups “—[NHCO]—” on the main molecular chain. The micro-foaming injection molding process is an innovative precision injection molding technology. The micro-foaming injection molding process breaks through many limitations of traditional injection molding, which can significantly reduce the weight of the part, shorten the molding cycle, and greatly improve the quality of the part. Warpage deformation and dimensional stability, the micro-foaming injection molding process has great advantages in the production of high-quality precision products. [0003] Micro-foamed PA mate...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems that the existing PA materials described in the above prior art have large dimensional changes, reduced mechanical properties, and poor surface quality due to their strong water absorption. The present invention provides a Micro-foamed polyamide magnetic plastics based on organic fluorine modification and preparation method thereof, by adding pro-CO in the formula 2 Additives and phenolic hydroxyl resins are used to regulate and improve the foaming effect and water absorption of PA composite materials. The preparation method adopts chemical foaming method and injection molding process, which is easy to operate and environmentally friendly.

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