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Polycarbonate/polyester composition and article prepared therefrom

A technology of polycarbonate and composition, applied in the field of polycarbonate/polyester composition and products prepared therefrom, capable of solving problems such as limiting chemical resistance

Active Publication Date: 2017-05-17
SHPP GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composition exhibits a desirable V-0 rating in the UL 94 Vertical Burn Test, but is limited to less than 12 parts by weight polyester, which limits the chemical resistance of the composition )

Method used

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  • Polycarbonate/polyester composition and article prepared therefrom
  • Polycarbonate/polyester composition and article prepared therefrom
  • Polycarbonate/polyester composition and article prepared therefrom

Examples

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preparation example Construction

[0089] The preparation of oligomeric and polymeric phosphonates is described in US Patents 7,816,486 and 7,560,525 to Freitag et al. Oligophosphonate as FRX TM 100 is commercially available from FRX Polymers, Inc., Chelmsford, Massachusetts.

[0090] In some embodiments, the flame retardant comprises the oligomeric or polymeric bis(aryloxy)phosphazene, and the oligomeric or polymeric aromatic phosphonate. In some embodiments, the flame retardant comprises bis(phenoxyphosphazene) oligomer and methyl-p-cumylphenylphosphonate oligomer.

[0091] In some embodiments, the flame retardant comprises the organophosphine oxide. In some of these embodiments, the organic phosphine oxide is triphenylphosphine oxide.

[0092] The total flame retardant content is 5 to 20 weight percent, specifically 5 to 15 weight percent, more specifically 8 to 12 weight percent, based on the total weight of the polymer and flame retardant. The content of the oligomeric or polymeric bis(aryloxy)phospha...

Embodiment approach 1

[0103] Embodiment 1: A composition comprising, based on the total weight of polymer and flame retardant, 25 to 75 weight percent aromatic polycarbonate; 10 to 40 weight percent polycarbonate-polysiloxane block copolymer 10 to 30 weight percent poly(alkylene terephthalate); and 5 to 20 weight percent flame retardant comprising 2 to 18 weight percent oligomeric or polymeric bis(aryloxy and 2 to 18 weight percent of an organic phosphine oxide, oligomeric or polymeric aromatic phosphonate, or a combination thereof; and 0.05 to 5 weight percent of a drip inhibitor.

Embodiment approach 2

[0104] Embodiment 2: The composition of Embodiment 1, wherein the aromatic polycarbonate comprises repeating units having the formula

[0105]

[0106] where R 1 At least 60% of the total number of groups are aromatic.

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Abstract

A composition includes specific amounts of an aromatic polycarbonate, a polycarbonate-polysiloxane block copolymer, a poly(alkylene terephthalate), a flame retardant, and a drip retardant. The flame retardant includes an oligomeric or polymeric bis(aryloxy)phosphazene in combination with an organophosphine oxide, an oligomeric or polymeric aromatic phosphonate, or a combination thereof. The composition is useful for fabricating parts for electrical and electronic devices.

Description

Background technique [0001] Polycarbonate (PC) is a well-known engineering plastic having excellent material properties including ductility, heat resistance, and transparency. Depending on the application, blends of polycarbonate with one or more thermoplastic polymers may be of interest for improving material properties including chemical resistance, processability, dimensional stability, Heat resistance and a variety of mechanical properties (including impact strength and tensile strength). Such thermoplastic polymers may include polyesters such as poly(alkylene terephthalates). Polycarbonate / polyester blends have also been found to have improved flow and weld line strength and are attractive for use in automotive and electronic applications. However, achieving the ideal balance between mechanical properties and flame retardancy in polycarbonate / polyester blends remains a challenge in applications requiring low halogen content compositions. Current non-halogenated flame r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L67/02C08L83/10C08L85/02C08K5/5397C08K5/5333C08K5/5399
CPCC08L69/00C08L83/10C08K5/5397C08L67/02C08L85/02C08K5/5333C08K5/5399C08L2201/02C08L2205/03C08L2205/035C08L2666/18C08L2666/22C08L67/03C08G64/12C08L2205/025
Inventor 陈林石洪涛万顺沈大可
Owner SHPP GLOBAL TECH BV