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Polyetherimide compositions and related articles and additive manufacturing methods

A technology of polyetherimide and composition, which is applied in the fields of polyetherimide composition and related products and additive manufacturing, and can solve the problems of reduced flame retardancy and the like

Active Publication Date: 2020-12-11
SHPP GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of impact modifiers to polyetherimide compositions often results in a significant decrease in their flame retardancy

Method used

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  • Polyetherimide compositions and related articles and additive manufacturing methods
  • Polyetherimide compositions and related articles and additive manufacturing methods
  • Polyetherimide compositions and related articles and additive manufacturing methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0146] Embodiment 1: a composition, based on the total weight of the composition, the composition includes: 40 to 60 weight percent polyetherimide; 15 to 50 weight percent block polyester carbonate, the block poly Ester carbonates comprise polyester blocks comprising resorcinol ester repeat units having the structure

[0147] and

[0148] Polycarbonate blocks comprising carbonate repeating units having the structure

[0149]

[0150] where R 1 At least 60% of the total number of groups are aromatic; 5 to 15 weight percent block polycarbonate-polysiloxane; and 1.5 to 7 weight percent core-shell impact modifier, based on core-shell resistance The weight of the impact modifier, the core-shell impact modifier comprises 60 to 95 weight percent of a polysiloxane-containing core, and 5 to 40 weight percent of a poly(alkyl (meth)acrylate) shell; wherein, the composition includes 0 to 0.8 weight percent polystyrene-poly(ethylene-butylene)-polystyrene block copolymer.

Embodiment approach 2

[0151] Embodiment 2: The composition of Embodiment 1, wherein the polysiloxane comprises polydimethylsiloxane.

Embodiment approach 3

[0152] Embodiment 3: The composition according to Embodiment 1 or 2, wherein the poly(alkyl(meth)acrylate) comprises poly(methyl methacrylate).

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Abstract

A polyetherimide composition comprises a specific amount of polyetherimide, block polyester carbonate, block polycarbonate-polysiloxane, and core-shell impact modifier, wherein the core comprising polysiloxane and the shell comprising poly(alkyl(meth)acrylate). Relative to corresponding compositions without the core-shell impact modifier, the polyetherimide compositions exhibit enhanced impact strength while substantially retaining flame retardancy. Related articles, including articles formed by additive manufacturing, and methods of additive manufacturing are also described.

Description

Background technique [0001] Polyetherimide has become the material of choice for additive manufacturing due to its high heat resistance and flame retardancy. However, the impact strength of additively manufactured parts may not be sufficient for some applications. Specifically, the impact strength values ​​of these parts may be about half that of injection molded parts made from the same polyetherimide composition. A known strategy for increasing the impact strength of thermoplastic compositions is the addition of impact modifiers. However, the addition of impact modifiers to polyetherimide compositions often results in a significant decrease in their flame retardancy. Accordingly, there is a need for a polyetherimide composition that provides three-dimensionally printed parts with significantly improved impact strength without substantially sacrificing flame retardancy. Contents of the invention [0002] The present inventors have determined that by containing specific a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08
CPCC08L79/08C08L2205/03C08L2205/035C08L69/005C08G73/1071C08G73/1046C08G73/106C08L51/085C08L2666/24C08L2666/02C08L81/10C08L53/00C08L83/10C08K5/5399B29C64/106B29C64/209B33Y80/00B33Y10/00B33Y30/00C08K2201/019C08G77/14C08G77/448C08L2205/16C08L2207/53
Inventor 萨拉·E·格里斯哈伯马尔维卡·比哈里凯利·莱昂维克拉姆·K·达加
Owner SHPP GLOBAL TECH BV