阅读说明：本技术 一种聚醚改性硅油的制备方法及其应用 (Preparation method and application of polyether modified silicone oil ) 是由 刘彬隆 于 2020-07-08 设计创作，主要内容包括：本发明公开了一种聚醚改性硅油的制备方法及其应用,该制备方法包括以下步骤：(1)称取脂肪酸和烯丙醇环氧基封端聚醚,在120-150℃下,反应2-5h；(2)反应完成后,将温度调至90-130℃,将装置改为冷凝回流条件,加入催化剂后滴加含氢硅油,反应3-12h；(3)反应完成后,将装置改为冷凝回收装置,脱除溶剂,得到黄色液体,即聚醚改性硅油。本发明通过调节亲油基团配比含量,可以很好地控制聚醚改性硅油的亲水亲油平衡,有利于涂料等配方体系亲油性物质和亲水性物质之间的润湿分散。(The invention discloses a preparation method and application of polyether modified silicone oil, wherein the preparation method comprises the following steps: (1) weighing fatty acid and allyl alcohol epoxy terminated polyether, and reacting for 2-5h at the temperature of 120-150 ℃; (2) after the reaction is finished, adjusting the temperature to 90-130 ℃, changing the device into a condensation reflux condition, adding a catalyst, dropwise adding hydrogen-containing silicone oil, and reacting for 3-12 h; (3) after the reaction is finished, the device is changed into a condensation recovery device, and the solvent is removed to obtain yellow liquid, namely polyether modified silicone oil. The invention can well control the hydrophilic-lipophilic balance of the polyether modified silicone oil by adjusting the proportion content of the lipophilic group, and is beneficial to the wetting and dispersion between the lipophilic substances and the hydrophilic substances of formula systems such as coating and the like.)

1. The preparation method of the polyether modified silicone oil is characterized by comprising the following steps:

(1) weighing fatty acid and allyl alcohol epoxy terminated polyether, and reacting for 2-5h at the temperature of 120-150 ℃;

(2) after the reaction is finished, adjusting the temperature to 90-130 ℃, changing the device into a condensation reflux condition, adding a catalyst, dropwise adding hydrogen-containing silicone oil, and reacting for 3-12 h;

(3) after the reaction is finished, the device is changed into a condensation recovery device, and the solvent is removed to obtain yellow liquid, namely polyether modified silicone oil.

2. The method for preparing polyether modified silicone oil according to claim 1, wherein the molar ratio of the epoxy groups of the fatty acid and the allyl alcohol epoxy-terminated polyether is 1:1-1: 8.

3. The method for preparing polyether modified silicone oil according to claim 1, wherein in step (1), the fatty acid is one or more of oleic acid, isooctanoic acid or neodecanoic acid.

4. The method for preparing polyether modified silicone oil according to claim 1, wherein in step (1), the epoxy value of the allyl alcohol epoxy group-terminated polyether is not less than 0.08mol/100g, and the double bond value is not less than 0.9 mmol/g.

5. The method for preparing polyether-modified silicone oil according to claim 1, wherein in step (2), the catalyst is a chloroplatinic acid isopropanol solution.

6. The method for preparing polyether modified silicone oil according to claim 1, wherein in step (2), the hydrogen-containing silicone oil is hydrogen-containing silicone oil having a hydrogen content of 0.18% to 1.6% or side chain hydrogen-containing silicone oil.

7. The method for producing polyether modified silicone oil according to claim 1, wherein in step (2), the time for dropping hydrogen-containing silicone oil is not more than 2 hours.

8. The method for preparing polyether-modified silicone oil according to claim 1, wherein the molar ratio of epoxy groups of the hydrogen-containing silicone oil and the allyl alcohol epoxy-terminated polyether is 1:1 to 1: 2.

9. Polyether modified silicone oil prepared by the method for preparing polyether modified silicone oil according to any one of claims 1 to 8.

10. Use of the polyether-modified silicone oil prepared by the method for preparing polyether-modified silicone oil according to any one of claims 1 to 8 as a dispersing aid, wetting agent, lubricant or foam inhibitor.

Technical Field

The invention relates to the technical field of silicone oil, and particularly relates to a preparation method and application of polyether modified silicone oil.

Background

The silicone oil is a polyorganosiloxane with a chain structure of polymerization degree. It is prepared through hydrolysis of dimethyldichlorosilane in water to obtain initial condensed ring body, cracking and rectifying to obtain low ring body, mixing the ring body, sealing agent and catalyst together to obtain various mixture with different polymerization degree, and vacuum distillation to eliminate low-boiling point matter to obtain silicone oil.

The most commonly used silicone oil, the organic groups are all methyl groups, is called methyl silicone oil. The organic group can also adopt other organic groups to replace part of methyl group, so as to improve certain properties of the silicone oil and adapt to different purposes. Other groups which are common are hydrogen, ethyl, phenyl, chlorophenyl, trifluoropropyl, and the like. In recent years, the development of organic modified silicone oils has been rapidly progressing, and many organic modified silicone oils having specific properties have appeared.

The modified silicone oil is mainly used in the field of coatings and mainly relates to the hydrophilic-lipophilic balance (HLB) control of silicone oil, and is mainly designed and completed through the structures and the compositions of a hydrophilic group and a lipophilic group.

Disclosure of Invention

The invention aims to solve the technical problem of providing a preparation method and application of polyether modified silicone oil, which adjusts the proportion content of oleophilic groups and adjusts the hydrophilic-oleophilic balance of the polyether modified silicone oil through the design of chemical blocks.

The technical problem to be solved by the invention is realized by the following technical scheme:

a preparation method of polyether modified silicone oil comprises the following steps:

(1) weighing fatty acid and allyl alcohol epoxy terminated polyether, and reacting for 2-5h at the temperature of 120-150 ℃;

(2) after the reaction is finished, adjusting the temperature to 90-130 ℃, changing the device into a condensation reflux condition, adding a catalyst, dropwise adding hydrogen-containing silicone oil, and reacting for 3-12 h;

(3) after the reaction is finished, the device is changed into a condensation recovery device, and the solvent is removed to obtain yellow liquid, namely polyether modified silicone oil.

Preferably, in the technical scheme, the molar ratio of the epoxy groups of the fatty acid to the allyl alcohol epoxy-terminated polyether is 1:1-1: 8.

Preferably, in the above technical solution, the fatty acid is one or a combination of more of oleic acid, isooctanoic acid, and neodecanoic acid.

Preferably, in the above technical scheme, in the step (1), the epoxy value of the allyl alcohol epoxy group-terminated polyether is not less than 0.08mol/100g, and the double bond value is not less than 0.9 mmol/g.

Preferably, in the above technical solution, in the step (2), the catalyst is a chloroplatinic acid isopropanol solution.

Preferably, in the above technical scheme, in the step (2), the hydrogen-containing silicone oil is hydrogen-containing silicone oil with a hydrogen content of 0.18% -1.6% or side chain hydrogen-containing silicone oil.

Preferably, in the above technical scheme, in the step (2), the time for dripping the hydrogen-containing silicone oil is less than or equal to 1 hour.

Preferably, in the above technical scheme, the molar ratio of epoxy groups of the hydrogen-containing silicone oil and the allyl alcohol epoxy-terminated polyether is 1:1-1: 2.

Polyether modified silicone oil is prepared according to the preparation method of the polyether modified silicone oil.

The polyether modified silicone oil prepared by the preparation method of the polyether modified silicone oil is used as a dispersing aid, a wetting agent, a lubricant or a foam inhibitor.

The technical scheme of the invention has the following beneficial effects:

the invention can well control the hydrophilic-lipophilic balance of the polyether modified silicone oil by adjusting the proportion content of the lipophilic group, and is beneficial to the wetting and dispersion between the lipophilic substances and the hydrophilic substances of formula systems such as coating and the like.

Detailed Description

The following detailed description of specific embodiments of the invention is provided to facilitate a further understanding of the invention.