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Epoxy modified acrylic resin for sealant and preparing method thereof

An acrylic resin and epoxy modification technology, used in the field of sealants, can solve the problems of poor weather resistance, low shrinkage, hardness, pollution resistance, solvent resistance, mechanical properties and special substrate adhesion. The effect of good performance, excellent heat resistance and simple preparation process

Inactive Publication Date: 2016-04-27
GUILIN HEXIN WATERPROOF DECORATION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Acrylic resin has the advantages of transparency, light color, light resistance and good outdoor aging resistance. It is a general-purpose resin material for coatings, but it has certain defects, such as hardness, pollution resistance, solvent resistance, mechanical properties, and special substrates. Adhesion is not good enough, etc., thus limiting its application
[0003] The molecular structure of epoxy resin contains epoxy groups, hydroxyl groups, ether bonds and other active groups, so it has outstanding thermal stability, mechanical properties, high chemical stability, corrosion resistance, low shrinkage, easy processing and molding, etc. , but its outdoor weather resistance is poor. Combining the advantages of both can overcome the defects of acrylic resin and expand the application range of acrylic resin

Method used

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  • Epoxy modified acrylic resin for sealant and preparing method thereof
  • Epoxy modified acrylic resin for sealant and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] (1) Stir and mix 50Kg methyl methacrylate, 50Kg butyl acrylate, 1.5Kg benzoyl peroxide and 30Kg isopropanol, pump them into a storage tank, and set aside;

[0021] (2) Add 8Kg epoxy resin E-44, 20Kg isopropanol and 2Kg dodecanethiol into the reaction kettle, heat and stir until dissolved, add 1 / 3 of the mixed monomer prepared in step (1), and heat up to 85°C After 30 minutes of reaction, start to add the remaining 2 / 3 of the mixed monomer dropwise, and finish the drop after 2 hours. After the dropwise addition, continue the 85°C heat preservation reaction for 3h, then cool down to 40°C, add 10Kg of isopropanol to stir and dilute, and discharge. A uniform and stable epoxy-modified acrylic resin for sealants is prepared.

Embodiment 2

[0023] (1) Stir and mix 54Kg methyl methacrylate, 46Kg butyl acrylate, 1.6Kg potassium persulfate and 35Kg n-butanol, pump it into the storage tank, and set aside;

[0024] (2) Add 9Kg epoxy resin E-44, 15Kg n-butanol and 2.5Kg dodecanethiol in the reaction kettle, heat and stir until dissolved, add 1 / 3 step (1) prepared mixed monomer, heat up to 110 ℃, after reacting for 35 minutes, start to add the remaining 2 / 3 of the mixed monomer dropwise, and finish dropping in 2.5 hours. material, to obtain a uniform and stable epoxy-modified acrylic resin for sealants.

Embodiment 3

[0026] (1) Stir and mix 58Kg methyl methacrylate, 42Kg butyl acrylate, 1.8Kg benzoyl peroxide and 40Kg ethanol, pump it into a storage tank, and set aside;

[0027] (2) Add 11Kg epoxy resin E-44, 20Kg ethanol and 3.5Kg dodecanethiol into the reaction kettle, heat and stir until dissolved, add 1 / 3 of the mixed monomer prepared in step (1), and heat up to 78°C , after 30 minutes of reaction, start to add the remaining 2 / 3 of the mixed monomer dropwise, and finish the drop in 2 hours. After the dropwise addition, continue to heat the reaction at 78°C for 3h, then lower the temperature to 40°C, add 15Kg of ethanol to stir and dilute, and discharge to obtain Epoxy modified acrylic resin for uniform and stable sealant.

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Abstract

The invention discloses epoxy modified acrylic resin for a sealant and a preparing method thereof; the epoxy modified acrylic resin is prepared from the following raw materials in parts by weight: 50-60 parts of methyl methacrylate, 40-50 parts of butyl acrylate, 2-5 parts of acrylic acid, 1.5-2.0 parts of an initiator, 8-12 parts of epoxy resin, 60-80 parts of a solvent, and 2-4 parts of dodecyl mercaptan. The epoxy modified acrylic resin for the sealant integrates the advantages of epoxy resin and acrylic resin, so that a composite emulsion has the advantages of excellent heat resistance, back sticking resistance, mechanical properties, excellent adhesion power and the like; and the preparation process is simple, and industrialized production can be achieved.

Description

technical field [0001] The invention relates to the technical field of sealants, in particular to an epoxy-modified acrylic resin for sealants and a preparation method thereof. Background technique [0002] Acrylic resin has the advantages of transparency, light color, light resistance and good outdoor aging resistance. It is a general-purpose resin material for coatings, but it has certain defects, such as hardness, pollution resistance, solvent resistance, mechanical properties, and special substrates. Adhesion is not good enough, etc., thus limiting its application. [0003] The molecular structure of epoxy resin contains epoxy groups, hydroxyl groups, ether bonds and other active groups, so it has outstanding thermal stability, mechanical properties, high chemical stability, corrosion resistance, low shrinkage, easy processing and molding, etc. , but its outdoor weather resistance is poor, combining the advantages of both can overcome the defects of acrylic resin and ex...

Claims

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Application Information

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IPC IPC(8): C08F283/10C08F220/14C08F220/18C08F220/06C09J151/08
CPCC08F283/10C09J151/08C08F220/1804
Inventor 黄志强王继发刘泓铭
Owner GUILIN HEXIN WATERPROOF DECORATION MATERIAL
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