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Siloxane modified acrylate levelling agent and preparation method thereof

A technology of siloxane modification and acrylate, applied in the field of powder coating additives, can solve the problems of insufficient environmental protection, poor leveling agent surface performance and anti-shrinkage ability, low resin compatibility and anti-pollution ability, etc. , to achieve good anti-shrinkage ability, improve anti-pollution ability, improve compatibility and anti-pollution ability.

Active Publication Date: 2015-12-09
HUANGSHAN HUAHUI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of siloxane modified acrylate leveling agent and preparation method, solve existing leveling agent property surface performance and anti-shrinkage capacity poor, and the compatibility of resin and anti-pollution ability are low , not enough environmental protection

Method used

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  • Siloxane modified acrylate levelling agent and preparation method thereof

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preparation example Construction

[0018] In the preparation method of the above-mentioned siloxane-modified acrylate leveling agent, first prepare mixed monomers: weigh 30-40 parts by mass of acrylate monomers, 10-15 parts by mass of methacrylate monomers, 5 ~10 parts by mass of the siloxane monomer, 1-2 parts by mass of the initiator and 10-15 parts by mass of the solvent are evenly mixed and then added to the high-level tank of the reaction kettle. The choice of acrylate monomer can be one or more mixtures of ethyl acrylate, butyl acrylate and isooctyl acrylate. Meanwhile, the methacrylate monomer can choose one or both of methyl methacrylate and ethyl methacrylate. In terms of the selection of the siloxane monomer, one or more of vinyltrimethoxysilane, vinyltriethoxysilane and vinyltriisopropoxysilane can be used. Methyl methacrylate, ethyl methacrylate and other methacrylates are functional monomers that improve the compatibility and anti-pollution ability of leveling agents and resins; vinyl trimethoxysi...

Embodiment 1

[0022] Embodiment 1 A method for preparing a siloxane-modified acrylate leveling agent, comprising the steps of: Step (1), weighing 30 parts by mass of ethyl acrylate, 10 parts by mass of methyl methacrylate, 5 parts by mass Parts of vinyltrimethoxysilane, 2 parts by mass of azobisisobutyronitrile and isopropanol of 15 parts by mass are mixed uniformly and added to the head tank;

[0023] Step (2), weigh 30 parts by mass of isopropanol and add it to the reactor, heat up to the reflux of isopropanol, and after the reflux is stable, add the mixed monomer in the header tank obtained through step (1) into the reactor In the process, the speed of addition is controlled, and the addition is completed evenly within 2 hours; then react at reflux temperature for 1 hour to ensure that the mixed monomers are completely reacted;

[0024] Step (3), steaming the isopropanol in the reaction kettle to obtain the leveling agent product.

Embodiment 2

[0025] Embodiment 2, a kind of method for preparing siloxane modified acrylate leveling agent, comprises the following steps: Step (1), weigh the butyl acrylate of 40 mass parts, the ethyl methacrylate of 15 mass parts, 10 Mass parts of vinyltriethoxysilane, 1 mass part of dibenzoyl peroxide and 10 mass parts of isopropanol are mixed evenly and added to the head tank;

[0026] Step (2), weigh 30 parts by mass of isopropanol and add it to the reactor, heat up to the reflux of isopropanol, and after the reflux is stable, add the mixed monomer in the header tank obtained through step (1) into the reactor In the process, the speed of addition is controlled, and the addition is completed evenly within 4 hours; then react at reflux temperature for 2 hours to ensure that the mixed monomers react completely;

[0027] Step (3), steaming the isopropanol in the reaction kettle to obtain the leveling agent product.

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Abstract

The invention relates to a siloxane modified acrylate levelling agent comprising 30-40 parts by mass of an acrylate monomer, 10-15 parts by mass of a methyl acrylate monomer, 5-10 parts by mass of a siloxane monomer, 1-2 parts by mass of an initiator and 40-45 parts by mass of a solvent. The problems that a conventional levelling agent is poor in surface properties and poor in ability to resist cavity shrinkage, low in compatibility with resin and low in ability to resist pollution and is not environmentally friendly enough can be effectively solved.

Description

technical field [0001] The invention relates to the field of powder coating additives, in particular to a silicone-modified acrylate leveling agent and a preparation method thereof. Background technique [0002] In the construction of powder coatings, as the coating cools to form a film, the surface tension of the coating film increases, and the viscosity increases, which makes the tension, viscosity and temperature of the bottom layer and the surface layer of the coating film different, so that the paint moves from the bottom layer to the surface layer, and the surface layer due to gravity Factors such as sinking, thus forming convection, resulting in irregular texture on the surface of the coating film, which is the phenomenon of orange peel. During the melt leveling process of the powder coating, a surface tension gradient is formed locally, the part with low surface tension expands to the part with high surface tension, and the part with high surface tension shrinks to t...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F220/14C08F230/08
Inventor 方向弘何领杨志萍王永垒汤增荣方红霞
Owner HUANGSHAN HUAHUI TECH
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