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Method for producing polyamide comprising amide-based molecular weight modifier, and polyamide produced thereby

A technology of molecular weight modifier and polyamide, which is applied in the field of polyamide, can solve the problems of low efficiency, achieve the effects of preventing molecular weight increase, shortening polymerization time, and improving productivity

Active Publication Date: 2020-08-21
HANWHA SOLUTIONS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is inefficient when applied to the reactive extrusion method due to solvent removal issues etc.

Method used

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  • Method for producing polyamide comprising amide-based molecular weight modifier, and polyamide produced thereby
  • Method for producing polyamide comprising amide-based molecular weight modifier, and polyamide produced thereby
  • Method for producing polyamide comprising amide-based molecular weight modifier, and polyamide produced thereby

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preparation example Construction

[0063] In this regard, in the present invention, a polyamide preparation method including an amide molecular weight regulator is provided, and the polyamide is prepared by anionic polymerization, which includes: a lactam; relative to the total amount of 100 parts by weight of the lactam, The alkali metal as an initiator is 0.01 to 20 parts by weight, the amide compound represented by the following chemical formula 1 as a molecular weight modifier is 0.3 to 10 parts by weight, and the activator is 0.002 to 7.0 parts by weight. In this way, a solution to the above-mentioned problems is sought.

[0064] Chemical formula 1:

[0065]

[0066] The R 1 and R 2 may be the same or different from each other, and are substituents containing heteroatoms, or hydrogen, straight-chain or branched-chain alkyl groups with 1 to 10 carbon atoms, straight-chain or branched-chain alkenyl groups with 2 to 10 carbon atoms, Aryl group having 6 to 20 carbon atoms, alkaryl group having 7 to 21 ca...

Embodiment 1

[0109] Preparation of Polymerized Samples Using Acetanilide as Molecular Weight Regulator

[0110] For the flask kept at 60°C under vacuum in order to remove the moisture in the flask, after the vacuum was released, 20g of laurolactam, 0.14g of acetanilide, and 0.02g of NaH were added, and the temperature was raised to 160°C in a vacuum atmosphere. ℃. After that, the reaction temperature was set at 230° C., nitrogen gas was injected, and after hydrogen gas generated while the substance was melted was removed, 3.4 ml of carbon dioxide was injected to react for 30 minutes. Finally, 30 minutes later, an aqueous formic acid solution (formic acid: distilled water = 1:1) was poured into the flask to terminate the reaction, and a sample having a content based on Table 1 below was collected. The molecular weight and molecular weight distribution index (PDI: polydispersity index) were confirmed using this, and the result is shown in Table 2 below.

[0111] Table 1:

[0112] ...

Embodiment 2

[0114] Preparation of Polymerized Samples Using Urea as Molecular Weight Regulator

[0115] The reaction was performed in the same manner as in Example 1 except that 0.12 g of urea (Urea) was used as a molecular weight regulator.

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Abstract

The present invention provides a method for producing a polyamide comprising an amide-based molecular weight modifier, and a polyamide produced thereby, wherein the amide-based molecular weight modifier can easily control the molecular weight of the polyamide to have a narrow molecular weight distribution so as to prevent an increase in the molecular weight due to a basic intermediate produced inanion polymerization and a side reaction generated under a high-temperature polymerization condition.

Description

technical field [0001] The present invention relates to a polyamide preparation method comprising an amide molecular weight regulator and the polyamide thus prepared. In more detail, it relates to the method of preventing the increase of molecular weight due to the basic intermediate generated in anionic polymerization and the side reaction under high temperature polymerization conditions by easily adjusting the molecular weight of polyamide so as to have a narrow molecular weight distribution, including The polyamide preparation method of the amide molecular weight regulator and the polyamide prepared therefrom. Background technique [0002] Polyamide resin is a linear polymer bonded by amide (-NHCO-) ​​bonds. Due to its strong toughness, excellent physical properties such as abrasion resistance, abrasion resistance, oil resistance, and solvent resistance, and easy melt molding, it is widely used Used as clothing materials, fibers for industrial materials, engineering plas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/18C08K5/21C08K5/057C08K3/12C08K3/22
CPCC08G69/18C08L77/02C08G69/20B01J31/121C08K5/21C08K5/057C08K3/12C08K3/22
Inventor 权庆浩都会李镇瑞金大鹤林京元金杜耿李惠连
Owner HANWHA SOLUTIONS CORP
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