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Flame retardant polymer blends

A technology of flame-retardant polymers and blends, which is applied in the field of polyimide and can solve the problems of opacity of PEI-PC blends

Active Publication Date: 2008-11-19
SHPP GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing PEI-PC blends of this type are opaque

Method used

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  • Flame retardant polymer blends
  • Flame retardant polymer blends
  • Flame retardant polymer blends

Examples

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Embodiment Construction

[0004] Combinations of silicone copolymers, such as silicone polyimide or silicone polycarbonate, and high glass transition temperature (Tg) polyimide (PI), polyetherimide (PEI) and poly The combination of an etherimide sulfone (PEIS) resin, and a resorcinol-derived aryl polyester has surprisingly low exotherm values ​​and improved solvent resistance. The resorcinol-derived aryl polyesters may also be copolymers containing non-resorcinol linkers, such as resorcinol-bisphenol A copolyestercarbonate. For better results, the resorcinol ester content (REC) should be greater than about 50 mol% of the resorcinol-derived polymer linker. A higher REC may be preferred. In some cases, a REC of greater than 75 mol% of the resorcinol-derived linker, or as high as 90 or 100 mol%, may be desirable.

[0005] The amount of resorcinol ester-containing polymer used in the flame retardant blend can vary widely, and any effective amount can be used to reduce exotherm, increase time to peak exot...

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Abstract

Blends of polyimides, polyetherimides or polyetherimide sulfones with resorcinol based polyesters, or resorcinol based polyester carbonate polymers, and silicone copolymers, have improved flame resistance. Peak heat release energy is reduced and the time to reach peak heat release is increased. In some instances the flame retardant blends show high percent transmission with low haze. Addition of metal oxides may further improve flame resistance.

Description

technical field [0001] The present invention relates to polyimides, polyetherimides and polyetherimide sulfones with resorcinol-based polyesters, or resorcinol-based polyester carbonate polymers and organic A blend of silicon copolymers. In some cases, the flame retardant blends were clear, exhibiting high percent transmission and low haze. In other cases, when transparency is not required, further metal oxides can be added to improve flame retardancy. Background technique [0002] There has long been interest in developing thermoplastic resins that can be flame resistant. A specific area of ​​focus is the development of plastics for transportation applications such as rail cars and aircraft. Various evaluation techniques have been developed to test the effectiveness of these materials, such as Federal Aviation Regulation (FAR) 25.853. In this test, sometimes referred to as the Ohio State University (OSU) scale, time to peak heat release, energy released after 2 minutes,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08L67/03C08L83/00C08L83/10C08L83/12C08K3/22
CPCC08L79/08C08L2205/02C08L83/10C08L67/03C08L83/12C08L2205/03C08L2666/18C08L2666/14C08L2666/20C08L83/00C08K3/22
Inventor 罗伯特·R·加卢奇威廉·A·柯尼克三世马克·A·桑纳拉詹德拉·K·辛格
Owner SHPP GLOBAL TECH BV
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