Flame-retardant PC/ABS composite material with high hydrolysis resistance and preparation method thereof

Abstract

The invention discloses a flame-retardant PC / ABS composite material with high hydrolysis resistance and a preparation method thereof. The composite material comprises PC resin, ABS resin, a fire retardant, a flexibilizer, a chain extender and other auxiliaries. According to the composite material, the flexibilizer with specific number-average particle size and specific molecular structure and the chain extender with high epoxide equivalent are selected, the hydrolysis resistance of the flame-retardant PC / ABS composite material can be improved by optimizing the raw materials, and the flame-retardant PC / ABS composite material can have relatively ideal flame retardance and mechanical property after being subjected to long-time high temperature and high humidity treatment and is particularly suitable for the occasions with relatively high requirements for the use environments.

Description

technical field [0001] The invention relates to a PC / ABS composite material and a preparation method thereof, in particular to a highly hydrolysis-resistant flame-retardant PC / ABS composite material and a preparation method thereof, belonging to the technical field of polymer composite materials and processing thereof. Background technique [0002] PC / ABS composite material is an important engineering plastic, which not only improves the heat resistance and tensile strength of ABS, but also reduces the melt viscosity of PC and improves the processing performance of the composite material. However, since the PC resin itself contains carbonate bonds that are sensitive to water, the presence of a small amount of water will cause the molecular chain to break and lead to a decrease in the mechanical properties of PC; in addition, in the process of synthesizing ABS or toughening agent, similar catalyst residues It will also aggravate the degradation of PC; the above reasons will l...

AI Technical Summary

Problems solved by technology

However, since the PC resin itself contains carbonate bonds that are sensitive to water, the presence of a small amount of water will cause the molecular chain to break and lead to a decrease in the mechanical properties of PC; in addition, in the process of synthesizing ABS or toughening agent, similar catalyst residues It will also aggravate the degradation of PC; the above reasons will lead to a sharp decline in the mechanical properties of PC / ABS composites once they are subjected to the combined action of water and high temperature

On the other hand, as a phosphate flame retardant commonly used in flame-retardant PC / ABS composite materials, it will also undergo hydrolysis under the combined action of high temperature and water, which further reduces the mechanical properties of the material, and the flame retardancy will also be affected. great influence

[0003] In view of the above technical problems, some researchers in the prior art use ABS resin with low rubber content and hydrolysis-resistant agent to improve, which can improve the mechanical properties and hydrolysis resistance of the composite material to a certain extent, but because the ABS resin used in it The content of rubber in the medium is low, and it is usually necessary to add a large amount of toughening agent and high molecular weight PC resin to supplement the toughness, which will reduce the fluidity of the material, and the impact of the toughening agent on the hydrolysis resistance is not explained.

Images