阅读说明：本技术 一种抗静电剂及其制备方法 (Antistatic agent and preparation method thereof ) 是由 沈尚益 于 2018-07-25 设计创作，主要内容包括：本发明属于塑料技术领域,具体涉及一种抗静电剂及其制备方法。所述抗静电剂由三硬脂酸甘油酯和季戊四醇硬脂酸酯制备而成,所述三硬脂酸甘油酯和季戊四醇硬脂酸酯的重量比为(1～4)∶1。本发明抗静电剂的抗静电性能优异,且与树脂相容性好,可以与其他助剂配伍使用,同时原料成本低,制备方法简单。(The invention belongs to the technical field of plastics, and particularly relates to an antistatic agent and a preparation method thereof. The antistatic agent is prepared from tristearin and pentaerythritol stearate, wherein the weight ratio of the tristearin to the pentaerythritol stearate is (1-4) to 1. The antistatic agent has excellent antistatic performance, good compatibility with resin, compatibility with other additives, low raw material cost and simple preparation method.)

1. The antistatic agent is characterized by being prepared from glyceryl tristearate and pentaerythritol stearate, wherein the weight ratio of the glyceryl tristearate to the pentaerythritol stearate is (1-4) to 1.

2. The antistatic agent of claim 1 wherein the weight ratio of glyceryl tristearate to pentaerythritol stearate is (3-4): 1.

3. The antistatic agent of claim 2 wherein the weight ratio of glyceryl tristearate to pentaerythritol stearate is 3: 1.

4. The antistatic agent according to any one of claims 1 to 3, wherein the pentaerythritol stearate is one or both of pentaerythritol monostearate and pentaerythritol distearate.

5. The antistatic agent according to claim 4, wherein the pentaerythritol stearate is a combination of pentaerythritol monostearate and pentaerythritol distearate in a weight ratio of pentaerythritol monostearate to pentaerythritol distearate of (2-3) to 1.

6. A process for preparing an antistatic agent according to any one of claims 1 to 3, characterized in that it comprises the following steps: putting pentaerythritol stearate and tristearin into a reaction kettle, introducing nitrogen to control the negative pressure to be 0.01-0.03 MPa, heating to 120-130 ℃, reacting for 30-40 min under stirring, and cooling to 110 ℃ to obtain the antistatic agent.

Technical Field

The invention belongs to the technical field of plastics, and particularly relates to an antistatic agent and a preparation method thereof.

Background

Any object has its own static charge, the accumulation of which affects or even jeopardizes life or industrial production, and chemicals which direct or eliminate the accumulated harmful charges so that they do not cause inconvenience or harm to production and life are called antistatic agents.

The antistatic agent can be classified into an external coating type and an internal mixing type according to the use mode. Antistatic agents can be classified into cationic, anionic, zwitterionic and nonionic types, depending on the ionic properties of the surfactant.

The external coating type antistatic agent is a type of antistatic agent used for coating the surface of a high polymer material. The antistatic coating is generally prepared by preparing a solution with water or alcohol, etc., then attaching the solution on the surface of a high polymer material by a method such as coating, spraying or dipping, and then drying at room temperature or hot air to form the antistatic coating. These are mostly cationic antistatic agents, and also partly amphoteric or anionic antistatic agents. Although suitable for use with a variety of polymers, such external antistatic agents are only temporary in effectiveness and are susceptible to loss of effectiveness upon contact with solvents or abrasion.

Internal mixing type antistatic agents refer to a type of antistatic agent that is added to the resin during processing. The resin and the antistatic agent are usually mechanically mixed and then molded. The antistatic agent is mainly nonionic and polymer permanent antistatic agent, and also has partial anion and cation types. Internal antistatic agents are incorporated during polymer processing, and such antistatic agents can supplement the antistatic function of being abraded by handling. The effect of such an internal antistatic agent depends on blooming, which means a process in which the internal antistatic agent added to the resin partially migrates to the surface of the polymer. Therefore, the internal antistatic agent has a long-term antistatic protection effect.

Besides endowing the surface of a high polymer material with certain lubricity, reducing the friction coefficient and inhibiting and reducing static charge generation by various antistatic agent molecules, different types of antistatic agents are different in chemical composition, use mode and action mechanism.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide an antistatic agent which has excellent antistatic performance, good compatibility with resin, low raw material cost and simple preparation method.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the antistatic agent is prepared from glyceryl tristearate and pentaerythritol stearate, wherein the weight ratio of the glyceryl tristearate to the pentaerythritol stearate is (1-4) to 1.

Preferably, the weight ratio of the glyceryl tristearate to the pentaerythritol stearate is (3-4) to 1.

Still preferably, the weight ratio of the glyceryl tristearate to the pentaerythritol stearate is 3: 1.

Preferably, the pentaerythritol stearate is one or both of pentaerythritol monostearate and pentaerythritol distearate.

Still preferably, the pentaerythritol stearate is a composition of pentaerythritol monostearate and pentaerythritol distearate, and the weight ratio of the pentaerythritol monostearate to the pentaerythritol distearate is (2-3) to 1.

Correspondingly, the invention also provides a preparation method of the antistatic agent, which specifically comprises the following steps: putting pentaerythritol stearate and tristearin into a reaction kettle, introducing nitrogen to control the negative pressure to be 0.01-0.03 MPa, heating to 120-130 ℃, reacting for 30-40 min under stirring, and cooling to 110 ℃ to obtain the antistatic agent.

Compared with the prior art, the invention has the following advantages:

(1) the invention provides a novel antistatic agent, which is a compound prepared from tristearin and pentaerythritol stearate at the negative pressure of 0.01-0.03 MPa and the temperature of 120-130 ℃, belongs to a nonionic antistatic agent, has excellent antistatic performance and good compatibility with resin, can be used together with other additives, and has low raw material cost.

(2) The preparation method of the antistatic agent is simple, does not need to consider the change of a complex synthetic chemical structure, forms a homogeneous compound in a short time, has extremely low energy consumption, higher labor productivity, reduced comprehensive production cost, no environmental pollution and no three-waste discharge.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.