Aramid copolymer

A technology for polymer and p-phenylenediamine, which is applied in the field of preparing aromatic polyamide polymers, and can solve problems such as control of positions without monomer components

Active Publication Date: 2014-04-02
DUPONT SAFETY & CONSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, by conventional polymerization method, in NMP / CaCl 2 DAPBI / PPD copolymers made in solvent systems tend not to have control over the position of the monomer components

Method used

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  • Aramid copolymer
  • Aramid copolymer
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Examples

Experimental program
Comparison scheme
Effect test

example

[0064] NMP, DMAC, LiCl, CaCl 2 , DAPBI, PPD and TCl were obtained from commercial sources.

example 1

[0066] Add 83.71 g of NMP / CaCl to a 1 L reactor equipped with frame stirrer, nitrogen inlet / outlet 2 Premix (8.3% by weight (weight of salt / total weight of salt and solvent)), 161.65 grams of NMP (N-methyl-2-pyrrolidone], 12.282 grams (0.055 moles) of DAPBI (5(6)-amino-2 - (p-aminophenyl)benzimidazole), 4.250 g (0.023 mol) of PPD.2HCl (p-phenylenediamine dihydrochloride), and stirred at room temperature. Unlike the case of adding PPD, all solid materials Dissolve completely within 30 minutes under stirring. The clear solution is light blue. The reaction mixture is stirred and cooled to below 10° C. in an ice-water bath. At this point, 5.560 grams (0.027 moles) of TCl are added in one go and stirred under nitrogen 5 minutes. The ice water bath was removed and a second portion of TCl, 10.325 grams, was added in one portion and stirred slowly for 30 seconds, and then the stirrer speed was increased to maximum. The solution became very viscous, gelled, and eventually rubberized T...

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Abstract

The invention concerns polymer comprising residues of 2-(4-amino phenyl)-5 (6) amino phenyl benzimidazole (DAPBI), paraphenylene diamine, and terephthaloyl dichloride, the polymer having a IPC peak block ratio of 1.45 to 1.47 and an inherent viscosity of greater than 2 dl/g.

Description

technical field [0001] This patent application relates to a process for the preparation of aromatic polyamide polymers derived from 5(6)-amino-2-(p-aminophenyl)benzimidazole (DAPBI), p-phenylenediamine Dihydrochloride (PPD.2HCl) and terephthaloyl dichloride (TCl), capable of forming fibers with excellent physical properties. Background technique [0002] Derived from 5(6)-amino-2-(p-aminophenyl)benzimidazole (DAPBI), p-phenylenediamine (PPD) and terephthaloyl dichloride (TCl or T, also commonly known as terephthaloyl dichloride Acid dichloride) fibers are known in the art. Such copolymers are high-strength fibers made in Russia (for example, under the trade name Know )Foundation. See Russian patent application 2,045,586. [0003] One problem with using DAPBI is that it is in NMP / CaCl 2 Has very poor solubility in solvent systems. In order to prepare a DAPBI / p-phenylenediamine (PPD) copolymer from a copolymer solution having a relatively high concentration of polymer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/32C08G73/18
CPCC08G69/06C08G73/18C08G69/00C08G69/32
Inventor K-S.李
Owner DUPONT SAFETY & CONSTR INC
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