Method of forming an aromatic polyamide copolymer

A technology of polymers and oligomers, 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: 2016-03-16
DUPONT SAFETY & CONSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, by the conventional polymerization method, in NMP / CaCl 2 DAPBI / PPD copolymers prepared in solvent systems tend not to have control over the position of the monomer components

Method used

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  • Method of forming an aromatic polyamide copolymer
  • Method of forming an aromatic polyamide copolymer
  • Method of forming an aromatic polyamide copolymer

Examples

Experimental program
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Effect test

example

[0062] NMP, DMAC, LiCl, CaCl 2 , DAPBI, PPD and TCl were obtained from commercial sources.

example 1

[0064] Add 104.64 grams of NMP / CaCl to a 1-liter reactor equipped with a frame stirrer and nitrogen inlet / outlet 2 Premix (8.3% by weight (weight of salt / total weight of salt and solvent)), 177.09 grams of NMP (N-methyl-2-pyrrolidone), and 2.539 grams (0.023 mole) of PPD (p-phenylenediamine), and Stir for 10 minutes. The contents were stirred in an ice water bath to cool the mixture to below 10°C. 9.536 g (0.047 mol) of TCl was added all at once and stirred for 5 minutes. The ice water bath was removed and 12.288 g (0.055 mole) DAPBI was added and stirred. The solution became very viscous and gelled in about 4 minutes. The highly viscous reaction mixture was stirred for another 25 minutes. Transfer the resulting polymer to Blender and grind into small particles, and then wash several times to remove solvent (NMP / CaCl 2 ) And excess HCl produced by the reaction. Then the polymer was neutralized with sodium bicarbonate, and finally washed with water several times to obtain a...

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Abstract

The present invention also relates to a method of forming a polymer comprising 2-(4-aminophenyl)-5(6)aminobenzimidazole (DAPBI), p-phenylenediamine and terephthaloyl dichloride residue, the method comprising: (a) forming a solution of an oligomer having a chloride end group from one mole of p-phenylenediamine and 1.3 to 5 moles of terephthaloyl dichloride in a solvent system, the solvent The system comprises an organic solvent and an inorganic salt; and (b) adding DAPBI and terephthaloyl dichloride to a solution of the oligomer to form a polymer.

Description

Technical field [0001] This patent application relates to a method of preparing an aromatic polyamide polymer, which is derived from 5(6)-amino-2-(p-aminophenyl)benzimidazole (DAPBI), p-phenylenediamine (PPD) and terephthaloyl dichloride (TCl), can form 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) Diformyl chloride) fibers are known in the art. This copolymer is a high-strength fiber made in Russia (for example, under the trade name with )Foundation. See Russian patent application 2,045,586. [0003] The two amines on DAPBI differ greatly in reactivity and location factors. The amine (azolamine) shown on the right side of the structure below is an order of magnitude more reactive than the amine (benzylamine) on the left side of the structure. [0004] [0005] Therefore, by the conven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/32C08G73/18
CPCC08G69/32C08G73/18C08G69/04
Inventor K-S.李
Owner DUPONT SAFETY & CONSTR INC
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