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Method for preparing polyamide by anionic polymerization and polyamide prepared thereby

An anionic polymerization and polyamide technology, which is applied in the field of ultra-high molecular weight polyamide and preparation of ultra-high molecular weight polyamide, can solve the problems of prolonging the polymerization time, increasing polyamide, gelation, etc., and achieve the effect of excellent mechanical properties

Pending Publication Date: 2022-07-15
HANWHA SOLUTIONS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the existing method of preparing polyamide by anionic polymerization, if one tries to increase the molecular weight of polyamide by simply prolonging the polymerization time, gelation may occur

Method used

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  • Method for preparing polyamide by anionic polymerization and polyamide prepared thereby
  • Method for preparing polyamide by anionic polymerization and polyamide prepared thereby
  • Method for preparing polyamide by anionic polymerization and polyamide prepared thereby

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preparation example Construction

[0034] In one aspect, the present invention provides a method for preparing a polyamide by anionic polymerization of lactams in the presence of a polymerization catalyst, an activator and a molecular weight regulator with a weight average molecular weight of 100,000 g / mol to 200,000 g / mol The method of mol polyamide, wherein the content of the activator is 0.002 to 20 parts by weight and the content of the molecular weight regulator is 0.01 to 10 parts by weight based on 100 parts by weight of the lactam.

[0035] monomer

[0036] The polyamide according to one embodiment of the present invention is prepared by anionic polymerization of lactams. Therefore, lactams are used as monomers for the preparation of polyamides. Specifically, the number of carbon atoms in the ring of the lactam is 4 to 12, and the lactam may be selected from the group consisting of laurolactam, caprolactam, piperidinone, pyrrolidone, enantholactam ( At least one of enantolactam and capryllactam, but...

Embodiment 1

[0069] The flask was kept at 70°C under vacuum to remove moisture from the flask. After the vacuum applied to the flask was released, 50 g of laurolactam (LL), 0.03 g of sodium hydride (NaH), 0.30 g of vinylbisstearamide (EBS) were added to the flask, and the temperature was raised under vacuum. to 165°C. The reaction temperature was set to 240°C, and the hydrogen gas generated when the above-mentioned raw materials were melted was removed while injecting nitrogen gas. 0.04 g of toluene diisocyanate (TDI) was added, and the reaction was carried out for 20 minutes. After 20 minutes, 50 ml of an aqueous formic acid solution (formic acid:distilled water=1:1, v / v) was added to the flask to terminate the reaction to obtain 48 g of polymerized polyamide.

Embodiment 2

[0071] 50 g of polyamide was prepared in the same manner as in Example 1, except that the amount of TDI added was 0.17 g.

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Abstract

The present invention relates to a method for preparing polyamides by anionic polymerization, and to polyamides prepared by the method. According to the preparation method of the polyamide provided by the embodiment of the invention, the polyamide with ultra-high molecular weight can be easily prepared. In addition, the ultra-high molecular weight polyamide according to the specific embodiment of the present invention has excellent mechanical properties, particularly impact strength. Therefore, the ultra-high molecular weight polyamide according to the specific embodiment of the present invention can be effectively applied to materials for vehicles, electronic equipment materials, industrial pipe materials, construction civil materials, 3D printer materials, fiber materials, coating materials, machine tool materials, medical materials, aeronautical materials, solar materials, battery materials, sports materials, home appliance materials, and the like. Component materials including household materials and cosmetic materials.

Description

technical field [0001] The present invention relates to a method for preparing polyamides by anionic polymerization, and to polyamides prepared by this method. More specifically, the present invention relates to a method for producing ultra-high molecular weight polyamides by anionic polymerization, and ultra-high molecular weight polyamides produced by the method. Background technique [0002] Polyamide refers to a polymer containing an amide (-CO-NH-) unit in the main chain. Polyamides can be prepared from two different bifunctional monomer units each containing two identical reactive groups (e.g. -NH2 or -COOH), or from each containing an amino and a carboxyl group, or capable of forming these groups of a bifunctional monomer unit. For example, polyamides can be prepared by polycondensation of diamines with dicarboxylic acids, polycondensation of aminocarboxylic acids, or ring-opening polymerization of lactams. [0003] Polyamides can be divided into aliphatic polyamid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/18C08G69/20
CPCC08G69/18C08G69/20
Inventor 李惠连李镇瑞权庆浩都承会金杜耿
Owner HANWHA SOLUTIONS CORP
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