Polycarbonate alloy compositions with stabilized thermo-oxidative aging properties, and methods for preparing and using same

A polycarbonate alloy composition with a microscopically heterogeneous sea-island structure addresses the issue of strength retention after thermal oxidative aging, ensuring high safety in electronic and electrical components and new energy vehicles.

JP2026500779APending Publication Date: 2026-01-08KINGFA SCI & TECH CO LTD
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Patent Information

Application Number
JP2025538463
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-12-30
Filing Date
2023-11-27
Publication Date
2026-01-08

AI Technical Summary

Technical Problem

Existing PC/SAN alloy materials fail to maintain high notched impact strength and tensile strength after long-term thermal oxidative aging tests at 110-130°C, which is insufficient for applications requiring high service safety, especially in electronics and electrical industries.

Method used

A polycarbonate alloy composition comprising 50-85 parts by weight of polycarbonate, 1-20 parts by weight of a styrene-acrylonitrile copolymer composite, 5-20 parts by weight of a flame retardant, 1-25 parts by weight of a toughener, 0.1-2 parts by weight of a stabilizer, and 0.1-5 parts by weight of an anti-dripping agent, with a microscopically heterogeneous sea-island structure, enhances thermal oxidative aging stability.

Benefits of technology

The polycarbonate alloy composition retains over 50% of its notched impact strength and tensile strength after 500 hours of thermal oxidative aging at 130°C, ensuring high service safety in electronic and electrical components, home appliances, and new energy vehicles.

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Abstract

The present invention relates to a polycarbonate alloy composition with stabilized thermal oxidative aging properties, as well as its preparation method and use. The polycarbonate alloy composition with stabilized thermal oxidative aging properties contains 10 to 99.9 parts by weight of polycarbonate, 1 to 20 parts by weight of a styrene-acrylonitrile copolymer composite, 5 to 20 parts by weight of a flame retardant, 1 to 25 parts by weight of a toughener, 0.1 to 2 parts by weight of a stabilizer, and 0.1 to 5 parts by weight of an anti-dripping agent. The styrene-acrylonitrile copolymer composite is composed of a styrene-acrylonitrile copolymer and a maleic anhydride-grafted styrene-acrylonitrile copolymer in a mass ratio of (2 to 8:1). The polycarbonate alloy composition not only has good thin-wall flame retardancy and toughness, but also good long-term thermal oxidative aging stability, making it suitable for a wide range of applications with high service safety requirements.
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Citation Information

Patent Citations

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