Antistatic polyamide composite material and preparation method thereof

A composite material and polyamide technology, applied in the field of polymer material synthesis, can solve the problems of reduced antistatic effect, poor fluidity, poor mechanical properties, etc., and achieve the effects of improving antistatic properties, reducing production costs, and reducing mechanical properties

Pending Publication Date: 2019-11-29
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The organic small molecule antistatic agents currently used are affected by factors such as surface evaporation, migration into the molded product, surface friction, washing, etc., the antistatic effect will be reduced or even completely disappeared, and cannot meet the long-term antistatic requirements of the product.
Most of the permanent antistatic agents are a kind of high molecular weight hydrophilic polymers, which have a long-lasting antistatic effect, but they require a high amount of addition, poor compatibility with the polyamide matrix, and high raw material costs , making the product have poor mechanical properties, poor fluidity, and high price, which also limits the widespread use of this type of antistatic polyamide composite material
[0004] It has been reported that graphene is added to the polymerization process of polyamide, and the interconnected graphene makes the material have better electrical conductivity, reduces the surface resistivity and volume resistivity of the material, and meets the requirements of antistatic polyamide, but the nanoscale The surface energy of graphene is very high, and it is easy to agglomerate. These reports have not proposed how to reasonably solve the problem of agglomeration of graphene in the preparation process of polyamide, so that the conductive effect of graphene is greatly reduced. Only by increasing the amount of graphene can it be To achieve the desired conductive and antistatic properties
However, under the existing processing conditions, the production cost of graphene with good dispersion is very high, and increasing the amount of graphene added will inevitably increase the production cost of antistatic polyamide composite materials, which will also hinder its application and promotion

Method used

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  • Antistatic polyamide composite material and preparation method thereof

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preparation example Construction

[0072]

[0073] A kind of preparation method of antistatic polyamide composite material, it comprises the following steps:

[0074] (1) 20-80 parts of aliphatic / aromatic dibasic acids, 0.2-10 parts of dibasic acids containing sulfonate groups, 20-80 parts of aliphatic dibasic amines, 2-30 parts of graphene aqueous solution, Add 0.1-0.4 parts of end-capping agent, 0.01-0.06 parts of catalyst, and 30-160 parts of deionized water into the autoclave in sequence;

[0075] (2) Vacuumize the autoclave and fill it with nitrogen to replace the air in the autoclave, then feed nitrogen until the pressure reaches 30-50kPa,

[0076] (3) Heating the autoclave, heating up to the first temperature, and reacting at constant temperature for 1-3 hours;

[0077] (4) Continue to heat up to the second temperature, and the pressure is raised to 1-3MPa thereupon, and the pressure is maintained at 1-3MPa by releasing water vapor in the autoclave;

[0078] (5) Slowly raise the temperature for 1-3 h...

Embodiment 1

[0101] The preparation method of the antistatic polyamide composite material of the present embodiment, it comprises the following steps:

[0102] (1), take by weight and be 54 parts of adipic acid, 44 parts of hexamethylenediamine, 2 parts of sodium succinic acid sulfonate, 20 parts of graphene mass fractions are 5% graphene aqueous solution, 0.25 parts of capping agent acetic acid , 0.03 parts of catalyst sodium hypophosphite, 100 parts of deionized water, and adding the above components into the autoclave;

[0103](2) Vacuumize and fill nitrogen three times to replace the air in the autoclave, and then feed nitrogen until the pressure reaches 40kPa, so that the reaction is always carried out under the protection of inert gas. After that, continue to heat up to 220°C, and the pressure will rise to 2MPa. At this time, the pressure will be kept at 2MPa by releasing the water vapor in the reactor, and the pressure will be released after slowly raising the temperature for 1.5 ho...

Embodiment 2

[0106] The preparation method of the antistatic polyamide composite material of the present embodiment, it comprises the following steps:

[0107] (1), taking by weight is 54 parts of adipic acid, 36 parts of butanediamine, 10 parts of isophthalic acid-5-sodium sulfonate, 30 parts of graphene content is 10% graphene aqueous solution, 0.4 part of sealed Terminal agent benzoic acid, 0.06 part of catalyst sodium phosphate, 40 parts of deionized water, and the above components are added in the autoclave;

[0108] (2) Vacuumize and fill nitrogen three times to replace the air in the autoclave, and then feed nitrogen until the pressure reaches 50kPa, so that the reaction is always carried out under the protection of inert gas, heat the autoclave to 80°C, and react at a constant temperature for 3 After that, continue to heat up to 180°C, and the pressure will rise to 1MPa. At this time, the pressure will be kept at 1MPa by releasing the water vapor in the reactor, and the pressure wi...

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Abstract

The invention provides an antistatic polyamide composite material, which comprises the following production raw materials: 20-80 parts of aliphatic / aromatic dibasic acid, 0.2-10 parts of dibasic acidcontaining a sulfonate group, 20-80 parts of aliphatic diamine, 2-30 parts of a graphene aqueous solution, 0.1-0.4 part of an end-capping reagent, 0.01-0.06 part of a catalyst, and 30-160 parts of deionized water. The invention further provides a preparation method of the composite material. According to the present invention, the prepared antistatic polyamide composite material has advantages ofgood antistatic property, good mechanical property, excellent compatibility, good heat resistance, high thermal deformation temperature, expanded application range and reduced production cost.

Description

technical field [0001] The invention belongs to the technical field of polymer material synthesis, and relates to an antistatic polyamide composite material and a preparation method thereof. Background technique [0002] Polyamide, commonly known as nylon, refers to a large class of polymers containing many repeating amide groups (-CONH-) in the main chain of the macromolecule. Since it came out in 1939, it has been used more and more widely. PA6, PA66, PA11, PA12, PA610, PA612, MXD6 and other nylons have come out one after another, and now the annual output exceeds 270×10 4 t, occupies an important position in engineering plastics. Polyamide is an excellent electrical insulating polymer material, and its surface resistivity is usually 10 14 ~10 16 Ω, the volume resistivity is 10 13 ~10 14 Ω˙cm, but only when the surface resistivity of the polyamide reaches 10 8 ~10 10 Ω, the volume resistivity reaches 10 11 Ω˙cm, the antistatic requirements can be met. Antistatic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/42C08K3/04
CPCC08G69/42C08K3/042C08K2201/011
Inventor 杨桂生赵冬云严莉莉李兰杰
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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