A kind of ultra-high molecular weight polyether modified polysiloxane for leveling agent and its preparation method and application

An ultra-high molecular weight, polyether modified technology, applied in applications, household utensils, inks, etc., can solve the problems of leveling, anti-scratch performance and gloss, reduce leveling, difficult to synthesize, etc., to achieve excellent Leveling and anti-scratch performance, reduced steric effect, high selectivity effect

Active Publication Date: 2021-02-26
SHANDONG DONGYUE ORGANIC SILICON MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of this invention is to carry out hydrosilylation reaction of terminal hydrogen-containing silicone oil, side-chain hydrogen-containing silicone oil or double-end side-chain hydrogen-containing silicone oil and allyl polyether under a platinum catalyst, although the leveling agent prepared by this invention is concentrated Leveling, wetting and dispersing, slip and anti-scratch, defoaming and anti-foaming properties are integrated, but this method is also difficult to obtain high molecular weight due to the difficulty of synthesizing high molecular weight hydrogen-containing silicone oil, or the steric hindrance effect of high molecular weight allyl polyether Polyether modified polysiloxane also has the problems of lower leveling, smooth performance and high price
[0009] In summary, the existing methods for preparing polyether-modified polysiloxanes mainly involve the hydrosilylation reaction between different types of hydrogen-containing silicone oils and allyl polyethers, which are all affected by the molecular weight of the hydrogen-containing silicone oil and the molecular weight of the polyether. However, it is difficult to obtain high molecular weight polyether-modified polysiloxane, and the leveling, scratch resistance and gloss of the coating film need to be improved

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  • A kind of ultra-high molecular weight polyether modified polysiloxane for leveling agent and its preparation method and application
  • A kind of ultra-high molecular weight polyether modified polysiloxane for leveling agent and its preparation method and application
  • A kind of ultra-high molecular weight polyether modified polysiloxane for leveling agent and its preparation method and application

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Embodiment 1

[0054] A preparation method of ultra-high molecular weight polyether modified polysiloxane, comprising steps:

[0055] (1) Allyl polyether (the molar ratio of ring ethoxy and cyclopropoxy is 1:1, the molecular weight is 500g / mol, hydroxyl end-blocking, available from Hangzhou Danwei Technology Co., Ltd.) and toluene into a three-necked flask And add a condensing reflux device, add a tetrahydrofuran solution of chloroplatinic acid with a mass concentration of 2%, and heat up to 80°C, which is conducive to the rapid completion of the hydrosilylation reaction at a higher temperature, and slowly add methyldichlorosilane dropwise to allow Methyldichlorosilane fully reacted to reduce losses, and the dropwise addition time was 1 hour. React at 90°C for 6 hours; then distill under reduced pressure at 110°C for 1 hour to obtain silicon ether; among them, the mass of toluene is 30% of the total mass of allyl polyether and methyl dichlorosilane; The molar ratio of propyl polyether is 1....

Embodiment 2

[0061] A preparation method of ultra-high molecular weight polyether modified polysiloxane, comprising steps:

[0062] (1) Allyl polyether (the molar ratio of ring ethoxy group and cyclopropoxy group in the raw material is 3:1, the molecular weight is 1000g / mol, hydroxyl end-capping, Zhejiang Huangma Technology Co., Ltd. DEM-1002) and toluene are added to the three-necked flask And add a condensing reflux device, add a tetrahydrofuran solution of chloroplatinic acid with a mass concentration of 2%, heat up to 82°C, slowly add methyldichlorosilane dropwise, the dropwise addition time is 1 hour, and react at 100°C for 6 hours; then Distill under reduced pressure at 110°C for 1 hour to obtain silicon ether; among them, the mass of toluene is 35% of the total mass of allyl polyether and methyl dichlorosilane; the molar ratio of methyl dichlorosilane to allyl polyether is 1.2 : 1; In terms of pure substance, the quality of chloroplatinic acid used is 0.0025% of the total mass of al...

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Abstract

The invention provides an ultra-high molecular weight polyether-modified polysiloxane for a leveling agent and its preparation method and application. The preparation of the polyether-modified polysiloxane comprises the steps of: allyl polyether and methyl dimethicone Chlorosilane in a solvent, under the catalysis of a platinum catalyst, a hydrosilylation reaction occurs to obtain a silicon ether; the alkyl silane is mixed with the silicon ether obtained above, and added dropwise to water for a hydrolysis reaction to obtain a hydrolyzate; under the catalysis of a basic catalyst Under the action, the cyclosiloxane monomer and the hydrolyzate undergo a copolymerization reaction, and then it is obtained through a neutralization reaction. The invention makes full use of the slippery properties of ultra-high molecular weight polysiloxane, and has excellent dispersibility after modification, effectively improving the slipperiness and gloss of water-based inks and coatings; the polyether used is easy to obtain and has strong selectivity. low cost.

Description

technical field [0001] The invention relates to an ultrahigh-molecular-weight polyether-modified polysiloxane for a leveling agent, a preparation method and application thereof, and belongs to the field of polymer materials. Background technique [0002] Polyether modified polysiloxane is widely used in the fields of fabric finishing agent, leveling agent, wetting agent and foam stabilizer. Leveling agent is a commonly used additive for coatings and inks, which can reduce the surface tension of coatings. Promote the stability and uniformity of the surface tension during the drying process of the wet film, and improve the leveling and smoothness of the coating film, so the leveling agent has the functions of anti-shrinkage, smooth and leveling. Polyether modified polysiloxane leveling agent has the characteristics of low surface tension, polysiloxane provides low surface tension and smoothness, and its compatibility can be controlled by polyether. [0003] Chinese patent doc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/46C09D11/03C09D7/47
CPCC08G77/46C09D11/03
Inventor 王春晓伊港刘海龙张振光周玲
Owner SHANDONG DONGYUE ORGANIC SILICON MATERIAL
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