Damp-heat-resistant PC/ABS flame-retardant composite material and preparation method thereof

Abstract

The invention belongs to the technical field of high polymer materials, and discloses a damp-heat-resistant PC / ABS flame-retardant composite material and a preparation method thereof. The damp-heat-resistant PC / ABS flame-retardant composite material comprises the following components in parts by weight: PC resin, ABS resin, a silane coupling agent, a phosphorus-based flame retardant, an auxiliaryflame retardant and a damp-heat-resistant stabilizer, the phosphorus-based flame retardant is bisphenol A-bis(diphenyl phosphate), and the auxiliary flame retardant is a sulfur-nitrogen-silicon flameretardant. According to the invention, a P-S-N-Si-based efficient composite flame retardant is adopted, commercial BDP is selected as a phosphorus-based flame retardant, but BDP is not resistant to damp and heat, and a large amount of BDP can reduce the mechanical properties of PC / ABS and the like, so S, N and Si flame retardant elements are additionally introduced to improve the flame retardant efficiency of the flame retardant; and by adding hydrolysis-resistant KH-550-melamine benzene sulfonate as an S-N-Si flame retardant, the flame retardant effect is improved, the addition amount of thecomposite flame retardant is reduced, the cost can be reduced, and the possibility of migration of the flame retardant can also be reduced.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a heat-and-humidity resistant PC / ABS flame-retardant composite material and a preparation method thereof. Background technique [0002] PC / ABS material is a thermoplastic blended from polycarbonate (PC) and acrylonitrile-butadiene-styrene (ABS). PC has excellent dimensional stability, mechanical properties and electrical properties, ABS has good impact resistance and processing properties, and PC / ABS combines the advantages of both, and is widely used in the fields of automotive interior parts, communication equipment, and electronic products. However, PC / ABS is a flammable material with potential safety hazards, so it is very important to modify PC / ABS flame retardant. [0003] Bisphenol A-(bisdiphenyl phosphate) is an effective flame retardant, but it is easy to precipitate from the matrix in a hot and humid environment, thereby reducing the flame retardant effect. ...

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Problems solved by technology

However, PC / ABS is a flammable material with potential safety hazards, so it is very important to modify PC / ABS flame retardant

[0003] Bisphenol A-(bisdiphenyl phosphate) is an effective flame retardant, but it is easy to precipitate from the matrix in a hot and humid environment, thereby reducing the flame retardant effect

Secondly, because the carbonate group of PC in the PC / ABS composite material is a polar water-absorbing group, it is prone to hydrolysis, and the excess bisphenol A contained in PC and the by-product Cl in high-temperature and high-humidity environment - The reaction generates HCl, which leads to hydrolysis of ester bonds and yellowing due to aging, which is not conducive to the long-term application and development of PC / ABS in the field of automotive equipment and electronic products. Therefore, it is also extremely important to improve the moisture and heat resistance of PC / ABS materials and flame retardants.

[0004] Chinese invention patents CN109280355A and CN106317821A both disclose a high hydrolysis-resistant flame-retardant PC / ABS composite material. performance, but there are still problems with the addition of a large amount of flame retardant, a large amount of hydrolysis-resistant stabilizer, and not resistance to heat and humidity

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