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In-situ stabilized nylon 6 and preparation method thereof

A nylon, in-situ technology, applied in the field of in-situ stabilization of thermoplastic engineering plastics, can solve the problems of affecting stabilization effect, volatilization loss, poor extraction resistance, etc.

Active Publication Date: 2014-12-10
浙江恒逸锦纶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low molecular weight of hindered amine, generally 150~500, it is dispersed in the polymer matrix in the form of small molecules. During material processing and use, it is easy to migrate from the polymer matrix to the surface, volatilizes and resists extraction. Poor performance, thus affecting its stabilizing effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 2g of N,N-bis(2,2,6,6-tetramethyl-4-piperidinyl) 1,6-hexanediamine and 15g of 4,4-diphenylmethane diisocyanate were rapidly The reaction was stirred, a large amount of heat was generated, and a white solid product was rapidly formed.

[0026] Put 1Kg of caprolactam into a three-necked bottle, heat to 120°C to melt, and vacuumize to remove moisture; then add 0.7g of calcium hydroxide, stir evenly, and then vacuumize again to remove moisture; add the prepared reactive hindered amine stabilizer to three Neck bottle, stir evenly, and quickly pour into a mold that has been preheated to 120°C, and react for 100 minutes to obtain in-situ stabilized nylon 6 products.

Embodiment 2

[0028] 4g of 2,2,6,6-tetramethyl-4-hydroxypiperidine reacted with 16g of hexamethylene-1,6-diisocyanate under rapid stirring at room temperature, a large amount of heat was generated, and a white solid was rapidly formed product.

[0029] Put 1000g of caprolactam into a three-neck bottle, heat to 145°C to melt, and vacuumize to remove moisture; then add 0.6g of sodium methoxide, stir evenly, and vacuumize again to remove moisture; add the prepared reactive hindered amine stabilizer to the three-neck bottle, stirred evenly, and quickly poured into a mold preheated to 120°C, and reacted for 200 minutes to obtain in-situ stabilized nylon 6 products.

Embodiment 3

[0031] 1g of tetramethylpiperidinamine reacted with 16g of toluene diisocyanate under rapid stirring at room temperature, a large amount of heat was generated, and a white solid product was rapidly generated.

[0032] Put 1000g of caprolactam into a three-neck bottle, heat to 120°C to melt, and vacuumize to remove moisture; then add 1.3g of potassium hydroxide, stir well, and then vacuumize again to remove moisture; add the prepared reactive hindered amine stabilizer to three Neck bottle, stir evenly, and quickly pour into the mold that has been preheated to 140°C, and react for 240min to obtain in-situ stabilized nylon 6 product.

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PUM

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Abstract

The invention discloses an in-situ stabilized nylon 6 and a preparation method thereof. The method is characterized by: putting 100 parts of caprolactam in a three-necked bottle, conducting heating to 100-150DEG C to perform melting, carrying out vacuum pumping to remove water; then adding 0.05-1.5 parts of an alkali catalyst, stirring them evenly, and carrying out vacuum pumping to remove water once again; and adding a reactive blocked amine stabilizer into a three-necked bottle, mixing the materials evenly, quickly pouring the mixture into a mold preheated to 100-210DEG C, and leaving the mixture to react for 10-300min, thus obtaining the in-situ stabilized nylon 6 product.

Description

technical field [0001] The invention relates to a preparation method of in-situ stabilized thermoplastic engineering plastics, belonging to the field of polymer material processing. Background technique [0002] Polyamide (Polyamide, referred to as PA), commonly known as nylon (Nylon), refers to a polymer with amide group (-CONH-) repeating structural units on the main chain. It has excellent mechanical properties, electrical properties, wear resistance, oil resistance, and solvent resistance. , self-lubricating, self-extinguishing, corrosion resistance and good processing performance and other advantages. The output of polyamide in engineering plastics has always ranked first, and its production capacity and output both occupy the first place in engineering plastics in all countries in the world. It has become an indispensable structural material for industries such as automobiles, electronic appliances, machinery, electrical, aerospace, and weapons. Among them, nylon 6 is...

Claims

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Application Information

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IPC IPC(8): C08G69/14C08G69/18C08G18/34C08G18/32C08G18/30
Inventor 叶林史开华赵晓文
Owner 浙江恒逸锦纶有限公司