Flame-retardant polyamide composite material as well as preparation method and application thereof

Abstract

The invention discloses a flame-retardant polyamide composite material which is prepared from the following components in parts by weight: polyamide resin, polyvinylpyrrolidone, a hypophosphite flame retardant, melamine polyphosphate, a borate flame-retardant synergist and glass fibers. By adding a certain amount of polyvinylpyrrolidone, the flame retardance can be improved (the content of a flame retardant, especially melamine polyphosphate, is reduced), precipitation of the flame retardant can be inhibited, and meanwhile, the crystallization speed of the flame-retardant polyamide composite material is reduced, so that the appearance of a workpiece is improved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a flame-retardant polyamide composite material and its preparation method and application. Background technique [0002] Halogen-free flame-retardant polyamides are widely used in low-voltage electrical appliances, new energy, and automobiles due to their excellent flame-retardant properties, mechanical properties, electrical properties, low smoke, low toxicity, and environmental protection. However, compared with other flame-retardant polyamides, halogen-free flame-retardant polyamides have problems such as poor appearance and precipitation after long-term storage, which seriously limit their wide application. [0003] In order to solve the appearance problem of organic phosphine flame-retardant polyamide, the common method at present is to improve the fluidity of the material. Although there is a certain improvement, the effect is limited, and flash is easy to form du...

AI Technical Summary

Problems solved by technology

But in general, although the surface precipitation has improved, it still exists and will deteriorate the impact performance of the material

In addition, this solution is not suitable for industries with relatively strict silicon control, such as household appliances.

In the field of engineering applications, Klein developed a new type of organic phosphine flame retardant, named OP 1400, to replace the OP 1230 / MPP solution to prepare low-emission halogen-free flame-retardant polyamide composites, but the flame-retardant efficiency of OP 1400 is low , the addition amount is large, and will reduce the flow properties of the material, thereby deteriorating the appearance of the halogen-free flame-retardant polyamide composite material

[0004] When glass fiber is reinforced, the defect of floating fiber is prone to appear, especially when the crystallization speed of the resin is too fast, the defect is aggravated