阅读说明：本技术 一种聚酯基础油及其制备方法 (Polyester base oil and preparation method thereof ) 是由 沈平 于 2020-07-29 设计创作，主要内容包括：本发明涉及一种聚酯基础油,包括有α-烯烃、丙烯酸酯和过氧化物引发剂,α-烯烃、丙烯酸酯和过氧化物引发剂的组分比例为5:3:3。通过采用上述方案,本发明克服现有技术存在的不足,提供了一种聚酯基础油及其制备方法,其可用于高粘度润滑油的制备。(The invention relates to polyester base oil which comprises alpha-olefin, acrylic ester and a peroxide initiator, wherein the component ratio of the alpha-olefin to the acrylic ester to the peroxide initiator is 5:3: 3. By adopting the scheme, the invention overcomes the defects in the prior art, and provides the polyester base oil and the preparation method thereof, which can be used for preparing high-viscosity lubricating oil.)

1. A polyester base oil characterized by: comprises alpha-olefin, acrylate and peroxide initiator, wherein the component ratio of the alpha-olefin to the acrylate to the peroxide initiator is 5:3: 3.

2. The polyester base oil according to claim 1, wherein: wherein the alpha-olefin is 1-dodecene.

3. The polyester base oil according to claim 1, wherein: wherein the acrylate is isooctyl acrylate.

4. The polyester base oil according to claim 1, wherein: the peroxide initiator is di-tert-butyl peroxide.

5. The polyester base oil according to claim 1, wherein: the viscosity index is 450-8000, and the pour point is-20 to-5 ℃.

6. The method for producing a polyester base oil according to claims 1 to 5, characterized in that:

selecting 5 parts of alpha-olefin, 3 parts of acrylate and 3 parts of peroxide initiator, and equally dividing the acrylate into 6 equal parts and equally dividing the peroxide initiator into 6 equal parts;

placing 5 parts of alpha-olefin, 0.5 part of acrylate and 0.5 part of peroxide initiator into a reaction container, heating the mixture to 130-150 ℃, stirring, and keeping for 3-5 hours;

adding 0.5 part of acrylate and 0.5 part of peroxide initiator into a reaction container, keeping the heating temperature at 130-150 ℃, stirring, and keeping for 3-5 hours;

step four, sequentially adding the remaining 2 parts of acrylic ester and 2 parts of peroxide initiator into the reaction container according to the proportion of the step three, keeping the heating temperature at 130-150 ℃, and stirring, wherein the reaction time is kept for 3-5 hours each time;

and step five, distilling the mixture obtained in the step four to remove residual alpha-olefin and acrylate.

Technical Field

The invention relates to polyester base oil and a preparation method thereof.

Background

Currently marketed base lubricants, which exhibit low viscosity and high pour point indices without additives, however, to better meet lubricant processing, high viscosity and bottom pour point base lubricants are required.

Disclosure of Invention

The invention overcomes the defects of the prior art and provides the polyester base oil and the preparation method thereof, which can be used for preparing high-viscosity lubricating oil.

In order to achieve the above object, the present invention provides a polyester base oil comprising an α -olefin, an acrylate and a peroxide initiator in a ratio of 5:3: 3.

The invention further provides that: wherein the alpha-olefin is 1-dodecene.

The invention further provides that: wherein the acrylate is isooctyl acrylate.

The invention further provides that: the viscosity index is 450-8000, and the pour point is-20 to-5 ℃.

In order to achieve the above objects, the present invention provides a method for preparing a polyester base oil,

selecting 5 parts of alpha-olefin, 3 parts of acrylate and 3 parts of peroxide initiator, and equally dividing the acrylate into 6 equal parts and equally dividing the peroxide initiator into 6 equal parts;

placing 5 parts of alpha-olefin, 0.5 part of acrylate and 0.5 part of peroxide initiator into a reaction container, heating the mixture to 130-150 ℃, stirring, and keeping for 3-5 hours;

adding 0.5 part of acrylate and 0.5 part of peroxide initiator into a reaction container, keeping the heating temperature at 130-150 ℃, stirring, and keeping for 3-5 hours;

step four, sequentially adding the remaining 2 parts of acrylic ester and 2 parts of peroxide initiator into the reaction container according to the proportion of the step three, keeping the heating temperature at 130-150 ℃, and stirring, wherein the reaction time is kept for 3-5 hours each time;

and step five, distilling the mixture obtained in the step four to remove residual alpha-olefin and acrylate.

By adopting the scheme, the polyester base oil has good oxidation resistance, good adhesion and pour point and low manufacturing cost, and can be used for producing lubricating grease.

Detailed Description

In this embodiment, the polyester base oil includes α -olefin, acrylate and a peroxide initiator, the α -olefin, the acrylate and the peroxide initiator are in a ratio of 5:3:3, the α -olefin is 1-dodecene, the acrylate is isooctyl acrylate, the peroxide initiator is di-t-butyl peroxide, the viscosity index is 450-8000, and the pour point is-20-5 ℃.

In this embodiment, a method for preparing polyester base oil includes selecting 100 g of 1-dodecene, 60 g of isooctyl acrylate, and 60 g of di-tert-butyl peroxide, dividing 1-dodecene into 6 equal parts, and dividing 60 g of di-tert-butyl peroxide into 6 equal parts;

placing 100 g of 1-dodecene, 10 g of isooctyl acrylate and 10 g of di-tert-butyl peroxide into a reaction container, heating the mixture to 130-150 ℃, stirring, and keeping for 3-5 hours;

adding 10 g of isooctyl acrylate and 10 g of di-tert-butyl peroxide into a reaction container, keeping the heating temperature at 130-150 ℃, stirring, and keeping for 3-5 hours;

step four, sequentially adding the remaining 40 g of isooctyl acrylate and 40 g of di-tert-butyl peroxide into the reaction container according to the proportion of the step three, keeping the heating temperature at 130-150 ℃, and stirring, wherein the reaction time is kept for 3-5 hours each time;

and step five, distilling the mixture obtained in the step four to remove residual olefin and acrylate.

The preparation method is equivalent to adding 6 equal parts of 1-dodecene and 6 equal parts of di-tert-butyl peroxide into a reaction vessel in six times in sequence, and the temperature and time of each reaction are the same, so that the stability of the polymerization reaction can be improved, and the preparation method is safer.

The above embodiments are merely preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.