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Process to make low color polyetherimide by halo-displacement and low color polyetherimide

A technology of polyetherimide and phthalimide, which is applied in the field of low-color polyetherimide and low-color polyetherimide prepared by halogen replacement, and can solve problems such as unmet needs

Active Publication Date: 2017-10-20
SHPP GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there remains a continuing, unmet need for polyetherimides with improved color properties, and methods of making such polyetherimides

Method used

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  • Process to make low color polyetherimide by halo-displacement and low color polyetherimide
  • Process to make low color polyetherimide by halo-displacement and low color polyetherimide
  • Process to make low color polyetherimide by halo-displacement and low color polyetherimide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0149] These examples show the effect of BPA salt color on polyetherimide color. Only by changing BPANa 2 Salt APHA to experiment with.

[0150] A masterbatch of ClPAMI (stoichiometry: about 0.13 mol% ClPA excess, r-MA = 0.21 mol%) was used for all examples 1-7. Following the same procedure (aggregation procedure 2 above) to make ClPAMI with BPANa with different APHA values 2 Salt reaction. In Table 3 the YI values ​​for the resulting polyetherimides are reported.

[0151] table 3

[0152] Example number

[0153] The data in Table 3 show that in BPANa 2 A strong correlation between the color of the salt and the color of the polyetherimide polymer, i.e., BPANa 2 An increase in the APHA value leads to an increase in the YI of the resulting polyetherimide polymer.

Embodiment 8-61

[0155] These examples determine the effect of BPANa 2 Factors of APHA of Salt and Description of Preparation of Low Color BPANA in the Laboratory and on Pilot Scale 2 salt process.

Embodiment 8 and 9

[0157] Except in Example 8, BPANa was performed under nitrogen 2 Synthesis and drying, and following the same general procedure as in Example 9, except that the reaction was carried out under air, two batches of BPANa were prepared at 175 °C 2 Salt. At different reaction times, BPANa was measured 2 The APHA values ​​of the salts are reported in Table 4.

[0158] Table 4. BPANa 2 Salt APHA

[0159] Response time (hours)

[0160]The data in Table 4 show that in BPANa 2 The presence of oxygen during salt synthesis can degrade the salt quality and increase the APHA value of the salt.

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Abstract

A polyetherimide of improved color and processes for preparing the polyetherimide are disclosed.

Description

Background technique [0001] In order to meet the increasing demand for polyetherimides, a "metathesis polymerization" process has been developed. Synthesis of polyetherimides by a metathesis polymerization process involves imidization, as described, for example, in U.S. Pat. No. 6,235,866 to produce bisphthalimides substituted with leaving groups; synthesis of dihydroxy Salts of aromatic compounds, as described, for example, in U.S. Patent No. 4,520,204; and polymerization by reacting ("displacement") substituted bisphthalimides and salts, as described, for example, in U.S. Patent No. 6,265,521 , followed by downstream operations. [0002] Specifically, imidization is usually performed by reacting 2 moles of phthalic anhydride substituted with a leaving group with 1 mole of diamine in a reaction solvent such as o-dichlorobenzene (ODCB) to Provides a bis(phthalimide) substituted with two leaving groups. In a specific embodiment, the substituted phthalic anhydride is 4-chloro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10
CPCC08G73/1046C08G73/1053C08K3/32C08G73/1028
Inventor 托马斯·古根海姆何塞·罗曼·加尔达梅斯哈维尔·涅韦斯·雷马查胡安·J·罗德里格斯·奥尔多内斯玛丽亚·帕特里西亚·福尔森·希门尼斯哈雷什·沙姆拉奥·德什潘德苏里亚·普拉卡萨·拉奥·达利帕尔蒂苏尼尔·S·杜马尔斯瓦库马尔·佩里亚萨米斯里尼瓦斯·马赫什·库马尔西瓦·库马尔·斯雷拉马吉里贝尔纳贝·克韦多·桑切斯
Owner SHPP GLOBAL TECH BV