Chloro-substituted polyetherimides having improved relative thermal index

A technology of polyetherimide and polyimide, applied in the direction of organic chemistry, etc., can solve the problems of non-commercial application, polyetherimide lowering of relative thermal index properties, etc.

Active Publication Date: 2012-11-07
SHPP GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, it has been found that chlorine-substituted polyetherimides prepared by the chlorine displacement method exhibit reduced relative thermal index properties, which are not suitable for some commercial applications

Method used

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  • Chloro-substituted polyetherimides having improved relative thermal index
  • Chloro-substituted polyetherimides having improved relative thermal index
  • Chloro-substituted polyetherimides having improved relative thermal index

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-54

[0103] In the following examples, the prepared polyetherimide was derivatized with a phosphorylation reagent, and then tested for the hydroxyl end group content by phosphorus 31 nuclear magnetic resonance (P31 NMR). Relative thermal index (RTI) ratings of polyetherimides are measured by the "Accelerated Thermal Aging Test Method" described further below, or by the "Underwriter's Laboratory Relative heat index test method UL746B determination. The molecular weight of the polyetherimide prepared in the embodiment is determined by gel permeation chromatography (GPC) using Polymer Laboratory mixed bed C column, dichloromethane as eluent, and polystyrene narrow molecular weight standard sample to determine Mp (peak molecular weight), Mn (number average molecular weight), and Mw (weight average molecular weight) of the material.

[0104] Techniques and Procedures

[0105] Underwriter's Laboratory Relative heat index test: the control polyetherimide and the polyetherimide of the...

Embodiment 1-9

[0113] Examples 1-9 investigate the effect of the presence of different bases on the hydroxyl end group content of polyetherimides during polymerization. The following examples include bisphenol A disodium salt and 1,3-bis(N-(4-chlorophthalimido))benzene (ClPAMI) in the presence of hexaethylguanidine chloride (HEGCl) catalyst polymerization. All polymerizations were carried out in o-dichlorobenzene (ODCB). Reactions were performed on laboratory scale.

[0114] Bisphenol A disodium salt was isolated and prepared as follows. To a 1 liter (L) round bottom flask was added a slurry of bisphenol A disodium salt in o-dichlorobenzene (ODCB). ODCB was removed by rotary evaporator (150 °C, full (2) filled, detached from the rotary evaporator, and placed in a vacuum oven for 3 days (130°C, full (2 Save it.

[0115] ClPAMI was isolated and prepared as follows. A sample of the ClPAMI slurry in ODCB was filtered using a Buchner funnel. The solid was washed successively with warm ODCB ...

Embodiment 10-12

[0123] Examples 10-12 investigate the effect of base addition point on the hydroxyl end group content of polyetherimides. K 3 PO 4 Used as a base. The base was added to bisphenol A disodium salt, the ClPAMI slurry was added and during polymerization.

[0124] The following example involves the polymerization of bisphenol A disodium salt and 1,3-bis(N-(4-chlorophthalimido))benzene (ClPAMI) in the presence of hexaethylguanidine chloride (HEGCl) catalyst . ClPAMI is rich in 4-monoamines. On a stoichiometric basis, amine-rich ClPAMI performed equally well in polymerization with bisphenol A disodium salt. All polymerizations were carried out in o-dichlorobenzene (ODCB). Reactions were performed on laboratory scale as described above.

[0125] Bisphenol A disodium salt was isolated and prepared as described above in Examples 1-9.

[0126] 4-Monoamine (4-MA) enriched ClPAMI was prepared as follows. Add m-phenylenediamine (2.743g, 25.365mmol), 4-chlorophthalic anhydride (4-Cl...

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Abstract

A polyetherimide having an OH content that is greater than 0 and equal or less than 100 ppm; a Relative Thermal Index that is greater than or equal to 170 DEG C; and a chlorine content that is greater than 0 ppm is disclosed herein. A method for preparing the polyetherimide is also disclosed.

Description

technical field [0001] The present invention relates to the field of polyetherimides. Polyetherimides are engineering plastics that are thermally stable and have many applications at severe elevated temperatures. Background technique [0002] Polyetherimides prepared by chlorine displacement are known. Unfortunately, it has been found that chlorine-substituted polyetherimides prepared by chlorine displacement exhibit reduced relative thermal index properties, which are not acceptable for certain commercial applications. Relative thermal index is a known property that indicates how the properties of a polymer deteriorate after being subjected to heat aging. As part of long-term thermal aging tests according to Underwriters Laboratories, Inc.'s long-term property evaluation standard for polymer materials (UL746B), some key properties of materials (such as dielectric strength, flammability, impact strength, and tensile strength) were studied. strength) maintenance. The end ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C08G73/12C08L79/08C07D209/48C08L71/00C08L81/02C08L81/06
CPCC08G73/101C08G73/122C08L79/08C08L81/02C08L81/06C08L79/085C08G73/1053C08L71/00C08L2666/20C08L2666/02C07D209/48C08G73/10
Inventor H.奇昂T.L.古根海姆M.A.N.德卡斯特罗
Owner SHPP GLOBAL TECH BV
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