Levelling agent for coating and preparation method of levelling agent

A technology of leveling agent and coating, applied in the field of coating leveling agent and its preparation, can solve problems such as easy foaming and poor thermal stability of leveling agent, achieve high temperature resistance, good emulsification stability, improve The effect of heat resistance

Inactive Publication Date: 2020-01-17
廖华平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a coating leveling agent and a preparation method thereof for the poor thermal stability of the current leveling agent and the problem of easy foaming

Method used

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  • Levelling agent for coating and preparation method of levelling agent

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preparation example Construction

[0022] The preparation method of the silicone oil matrix is ​​as follows: take octamethylcyclotetrasiloxane and add 1,3,5,7-tetramethyltetrahydrocyclotetrasiloxane at a mass ratio of 5~8:3~5, and then add octamethylcyclotetrasiloxane Hexamethyldisiloxane with 30~50% of the mass of methylcyclotetrasiloxane, stirred and mixed at 30~40°C for 20~30min to obtain a mixture, take the mixture at a mass ratio of 90~100:1~3 and add the mass fraction It is 98% sulfuric acid, stirred and mixed at 50~60°C for 2~4h, cooled to room temperature to obtain a cooled product, and calcium hydroxide was added to the cooled product at a mass ratio of 2~5:100~110 to adjust the pH to 6~7. Suction filtration, take the suction filtrate and distill under reduced pressure to obtain the silicone oil matrix.

[0023]The preparation method of the modified active agent is: take trimethylolpropane monoallyl ether and add dichloromethane at a mass ratio of 2~5:10~20, stir and mix for 20~30min, add 3~5% of dichl...

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Abstract

The invention discloses a levelling agent for a coating and a preparation method of the levelling agent, and belongs to the technical field of coatings. A prepared silicone oil substrate makes the levelling agent have better lubricating properties, and active hydrogen in hydrogen-terminated polydimethylsiloxane can be reacted with an allyl polyether to introduce the active siloxane into the molecular chain of a levelling agent to form the self-lubricating levelling agent; a prepared modification active agent forms a more water-resistant surface layer, so that the high temperature resistance ofthe silicone oil levelling active agent is improved, and the levelling agent can still maintain better emulsification stability under high-temperature conditions without phase separation; a preparedviscosity-reducing active agent makes the levelling agent have increased horizontal fluidity and higher gloss, and form a smooth surface; and a prepared defoaming active agent improves defoaming in the self-levelling process, reduces levelling resistance brought by foam and improves the levelling effect. The levelling agent provided by the invention solves the problems that a current levelling agent has poor thermal stability and is easy to foam.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a coating leveling agent and a preparation method thereof. Background technique [0002] Leveling agent is a commonly used coating additive, which can promote the formation of a flat, smooth and uniform coating film during the drying and film forming process of the coating. A class of substances that can effectively reduce the surface tension of coating fluids and improve their leveling and uniformity. It can improve the permeability of the coating solution, reduce the possibility of spots and marks when brushing, increase the coverage, and make the film formation uniform and natural. Mainly surfactants, organic solvents, etc. There are many types of leveling agents, and the types of leveling agents used in different coatings are also different. High boiling point solvents or butyl cellulose can be used in solvent-based finishes. In water-based finishes, surfactants or polya...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/47C08G77/46C08G77/12C08G63/20
CPCC08G63/20C08G77/12C08G77/46C09D7/47
Inventor 廖华平
Owner 廖华平
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