Preparation method of polyether modified organic silicon

A polyether modification and organosilicon technology, which can be applied to coatings and other directions, can solve the problem of adding a large amount of organic solvents, and achieve the effects of easy control, low cost, and large-scale industrial production.

Active Publication Date: 2015-05-06
SHANGHAI PHICHEM MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of adding a large amount of organic solvents in the prior art, the embodiment of the present invention provides a preparation method of polyether modified silicone

Method used

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  • Preparation method of polyether modified organic silicon
  • Preparation method of polyether modified organic silicon
  • Preparation method of polyether modified organic silicon

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Embodiment 1

[0032] as attached figure 1 As shown, the embodiment of the present invention provides a preparation method of polyether-modified silicone, and the preparation method specifically includes the following steps:

[0033] Under the condition that inert gas and polymerization inhibitor exist, the monoallyl polyether is reacted with an antioxidant, and the monoallyl polyether is subjected to antioxidant treatment.

[0034] During the storage process of monoallyl polyether, if it is in contact with air for too long, peroxide groups will be generated, which will hinder the catalysis of the catalyst in the subsequent monoallyl polyether polyaddition reaction and reduce the reaction efficiency , as a preference, so the embodiment of the present invention uses at least one of ascorbic acid, propyl gallate, citrate and ascorbyl palmitate as an antioxidant to first carry out antioxidant treatment on monoallyl polyether. The anti-oxidation treatment is to add an anti-oxidant to the monoal...

Embodiment 2

[0058] First, N was passed into a 250ml four-necked glass flask. 2 , and then convert the structure to CH 2 =CHCH 2 O(C 2 h 4 O) 6 H's monoallyl polyether 100g, propyl gallate 0.1g, polymerization inhibitor tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester (commercial brand "anti- Oxygen agent 1010") 0.1g was added to the four-necked flask, stirred and heated to 80°C, and reacted for 1h. Then, add 138g of low-hydrogen silicone oil (hydrogen content 0.15%, viscosity 13cps) and 0.933g isopropanol solution of chloroplatinic acid with a mass fraction of 2% to the four-necked flask, the reactant starts to change from turbid to transparent, continue The heat preservation reaction was carried out for 2 hours, and the Si-H peak was detected by infrared absorption spectrum to stop the polyaddition reaction. Heat the reaction system after the polyaddition reaction to 90°C, add 35g of acetic anhydride, keep it warm for 2 hours, and detect through IR ...

Embodiment 3

[0062] In a 250ml four-necked glass flask, N 2 , and join the structure as CH 2 =CHCH 2 O(C 2 h 4 O) 6 100g of monoallyl polyether of H, 3g of ascorbyl palmitate, 0.3g of benzoquinone polymerization inhibitor, stirring and raising the temperature to 60°C, and keeping the temperature for 3h. Then add 0.933g of platinum solution with a mass fraction of 2% to the above reaction system, stir evenly, and add 138g of low-hydrogen silicone oil (hydrogen content 0.15%, viscosity 13cps) dropwise within 1h, the reactant changes from turbid to transparent , the temperature was raised to 90° C. and the reaction was continued for 3 h. When the Si-H peak disappeared by IR detection, the reaction was stopped. Raise the temperature to 100°C, add 35g of acetic anhydride, and react for 1h. When the -OH peak disappears through IR detection, the reaction system is distilled under reduced pressure to distill off excess acetic anhydride and other low-boiling substances to obtain a yellow to br...

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Abstract

The invention discloses a preparation method of polyether modified organic silicon, and belongs to the technical field of the preparation of leveling agent. According to the invention, silicon atom is connected to mono allyl polyether group to form a hydrolysis resistant Si-C bond, so that the prepared polyether modified silicone can effectively improve the leveling property, enhance gloss, slip degree and scratch resistance of the paint; the reaction process does not involve solvent participation, and has the advantages of low cost, green, environment-friendliness; and the preparation process is simple, efficient, easy to control and conducive to large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of preparation of paint leveling agents, in particular to a preparation method of polyether modified silicone. Background technique [0002] Polyether modified silicone is a modified silicone leveling agent, which can significantly reduce the surface tension of the coating and improve the wettability of the coating to the substrate, thereby reducing the orange on the surface of the coating film. Improve the apparent quality of the coating film, reduce the surface friction of the coating film, and improve the scratch resistance of the coating film. [0003] In the prior art, firstly, the methyl moiety hydrogen-containing silicone oil is prepared by the mixed siloxane equilibrium method, and then toluene or isopropanol, which accounts for 30%-70% of the total mass of the reaction system, is added to the reaction system as a solvent, so that the obtained methyl moiety Hydrogen-containing silicone oil reacts wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/06C08G81/00C08G77/46C08G77/38C09D7/47
CPCC08G77/38C08G77/46C08G81/00C09D7/47
Inventor 江彭胜郭彦彬曹松
Owner SHANGHAI PHICHEM MATERIAL CO LTD
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