Alcoholysis-resistant polyamide resin as well as preparation method and application thereof

A polyamide resin and alcoholysis-resistant technology, which is applied in the field of polyamide resin, can solve the problems of changing mechanical properties, reducing the overall polarity of materials, reducing water absorption, etc., and achieves good surface properties, good mechanical properties, and good hydrolysis resistance. Effect

Pending Publication Date: 2022-05-17
HUAFON GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technical scheme reduces the overall polarity of the material and reduces the water absorption of the material by adding high molecular weight maleic anhydride grafted polyethylene wax, thereby improving the hydrolysis resistance of short glass fiber reinforced nylon 66, but it does not affect nylon 66 Resin properties are improved
[0006] It can be seen that the method for improving the alcoholysis resistance of n

Method used

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  • Alcoholysis-resistant polyamide resin as well as preparation method and application thereof
  • Alcoholysis-resistant polyamide resin as well as preparation method and application thereof
  • Alcoholysis-resistant polyamide resin as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0082] Example 1

[0083] The present embodiment provides a resistant alcohol-dissolved polyamide resin (relative viscosity of 2.40), comprising the following mass percentage of raw material components:

[0084]

[0085] Among them, the comonomer comprises the following mass percentage components: nylon 66 salt 92%, nylon 612 salt 5% and nylon MXD6 salt 3%, the antidolytic is composed of bis (2,6-diisopropylphenyl) carbon diimide and polycarbon diimide (UN-03) by mass ratio 1: 2.

[0086] The preparation method of the above-mentioned alcohol-resistant polyamide resin is as follows:

[0087](1) The mass concentration of 57% of the comonomer solution is added to the concentration tank with a pressure of 0.25MPa for concentration, the concentrated mass concentration of 80% of the expolymer monomer solution, the mass concentration of 50% of the hexanediamine solution and sodium hypophosphite react in a nitrogen atmosphere, after heating up, holding pressure, pressure relief and vac...

Example Embodiment

[0090] Example 2

[0091] The present embodiment provides a glycolytic polyamide resin (relative viscosity of 2.60), comprising the following mass percentage of raw material components:

[0092]

[0093] Among them, the comonomer comprises the following mass percentage components: nylon 66 salt 80%, nylon 610 salt 15% and nylon 6T salt 5%, the alcohol-resistant antilyte is composed of highly effective macromolecular hindered amines and phospholipid compounds (Hiplamide A0-200), epoxy polymer hydrolysate (Sanwell AH81) according to the mass ratio of 1:1.

[0094] The preparation method of the above-mentioned alcohol-resistant polyamide resin is as follows:

[0095](1) The nylon salt solution with a mass concentration of 56.75% and a dodecanamide solution with a mass concentration of 50% are added to the concentration tank with a pressure of 0.25MPa for concentration, and the comonomer solution with a mass concentration of 80%, a capscaping agent solution with a mass concentratio...

Example Embodiment

[0098] Example 3

[0099] The present embodiment provides a resistant alcohol-lysed polyamide resin (relative viscosity of 3.10), comprising the following mass percentage of raw material components:

[0100]

[0101] Among them, the comonomer comprises the following components of mass percentage: nylon 66 salt 86%, nylon 612 salt 10% and nylon 6I salt 4%.

[0102] The preparation method of the above-mentioned alcohol-resistant polyamide resin is as follows:

[0103](1) The mass concentration of 57% of the comonomer solution was added to the concentration tank of 0.2MPa for concentration, the concentrated mass concentration of 75% of the comonomer solution, the mass concentration of 45% of the monohydrate solution and sodium hypophosphite reacted under the protection of nitrogen, after heating and pressure increase, pressure holding and heating, pressure relief and vacuum, to obtain polyamide polymer; wherein, when heating and pressure increase, the rate of heating is 1.7 °C / mi...

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Abstract

The invention provides alcoholysis-resistant polyamide resin as well as a preparation method and application thereof. The polyamide resin is prepared from the following raw material components in percentage by mass: 97.8 to 99.98 percent of a comonomer and 0.0043 to 0.011 percent of an end-capping reagent, the comonomer is prepared from the following components in percentage by mass: 80 to 92 percent of nylon 66 salt and 5 to 15 percent of aliphatic amide monomer; the molar concentration of terminal carboxyl groups in the polyamide resin is 10 to 25 mmol/kg; the molar ratio of amino-terminated groups to carboxyl-terminated groups in the polyamide resin is greater than or equal to 4: 1. The alcoholysis-resistant polyamide resin is prepared by the following steps: reacting a comonomer with an end-capping reagent to obtain a polyamide polymer, mixing the polyamide polymer with an optional alcoholysis-resistant agent, and slicing and granulating. The alcoholysis-resistant polyamide resin provided by the invention has better alcoholysis resistance and better mechanical properties, and is suitable for being used as a vehicle material.

Description

technical field [0001] The invention belongs to the field of polyamide resins, in particular to an alcoholysis-resistant polyamide resin and its preparation method and application. Background technique [0002] Polyamide is the general term for thermoplastic resins containing repeated amide groups on the main chain of the molecule. properties, wear resistance, chemical resistance and self-lubricating properties, low friction coefficient, certain flame retardancy, and easy processing, so its products are widely used, covering almost every field, and are among the top five engineering plastics. The widest variety. However, due to the presence of amide groups, polyamide is prone to hydrolysis reaction in an environment with high temperature and high humidity. Once the hydrolysis reaction occurs, the polyamide product will degrade rapidly, resulting in a significant decline in product performance and service life. , Lose the application value, so how to prepare a polyamide res...

Claims

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Application Information

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IPC IPC(8): C08G69/28C08G69/26C08G69/48
CPCC08G69/28C08G69/26C08G69/48
Inventor 陈召陈鑫博王晓华姚增文陈敏杨小娜
Owner HUAFON GROUP
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