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Aramid copolymer

A technology of polymer and terephthaloyl dichloride, which is applied in the field of preparing aromatic polyamide polymers, and can solve problems such as the control of the position of monomer components that do not have

Active Publication Date: 2014-05-28
DUPONT SAFETY & CONSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 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
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example

[0067] NMP, DMAC, LiCl, CaCl 2 , DAPBI, PPD and TCl were obtained from commercial sources.

example 1

[0069] This example shows the preparation of DAPBI / PPD-T copolymers with a controlled "head-to-tail" DAPBI arrangement. DAPBI [5(6)-amino-2-(p-aminophenyl)benzimidazole] has two amine groups with very different reactivity, so-called unsymmetrical diamines. An amino group attached to a benzene ring with a fused imidazole ring reacts an order of magnitude faster than an amino group on a separate benzene ring on the opposite side of the molecule. Head and tail in this example represent faster / slower reacting amines, respectively; ie "head" is benzylamine and "tail" is azole amine.

[0070] polymer preparation :

[0071] Add 83.75 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 plus solvent)), 163.30 g of NMP (N-methyl-2-pyrrolidone] and 12.288 g (0.055 mol) of DAPBI and stirred for 10 minutes. At this point DAPBI was not completely dissolved in the solvent system. Stir the content...

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Abstract

The invention concerns polymer comprising 2-(4-amino phenyl)-5 (6) amino phenyl benzimidazole (DAPBI), PPD, and terephthaloyl dichloride, the polymer having an IPC peak block ratio of 1.52 to 1.56 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 (PPD) 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 p-phenylene Diformyl chloride) fibers are known in the art. Such copolymers are high-strength fibers made in Russia (for example, under the trade name and )Foundation. See Russian Patent Application 2,045,586. [0003] The two amines on DAPBI differ greatly in terms of reactivity and positional factors. The amine shown on the right side of the structure below (azole amine) is an order of magnitude more reactive than the amine on the left side of the structure (benzylamine). [0004] ...

Claims

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Application Information

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IPC IPC(8): C08G69/32C08G73/18
CPCC08G69/32C08G73/18C08G69/00C08G69/28
Inventor K-S.李
Owner DUPONT SAFETY & CONSTR INC
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