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Preparation method of high-reaction-activity hydroxyl acrylic resin

A hydroxy acrylic, highly reactive technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems such as the inability to further improve the comprehensive performance of the resin, the single molecular structure of the hydroxy acrylic resin, and the inability to realize the optimization of the combination of the hydroxy acrylic resin, etc. To achieve the effect of excellent compatibility, excellent comprehensive performance and high hardness

Inactive Publication Date: 2013-06-05
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydroxyacrylic resin prepared in this way has a single molecular structure, and the combination optimization of hydroxyacrylic resins with different molecular structures cannot be realized, so the comprehensive performance of the resin cannot be further improved.

Method used

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  • Preparation method of high-reaction-activity hydroxyl acrylic resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) First, under the protection of nitrogen, add 100 parts by weight of toluene into the reaction vessel, and raise the temperature to 130°C;

[0026] 2) Then, slowly drop a mixture of 50 parts by weight of methyl methacrylate, 5 parts of hydroxyethyl acrylate, 1 part of acrylic acid and 2 parts of azobisisobutyronitrile into the reaction vessel, and keep warm for 0.5 ~1h;

[0027] 3) Then, slowly drop a mixture of 10 parts of methyl acrylate, 15 parts of ethyl acrylate, 25 parts of propyl acrylate, 10 parts of hydroxyethyl acrylate, 3 parts of acrylic acid and 1 part of azobisisobutyronitrile into the reaction In the container, keep warm for 1~2h;

[0028] 4) Finally, the temperature of the material is lowered to below 70°C to obtain a hydroxyacrylic resin product.

Embodiment 2

[0030] 1) First, under the protection of helium, add 50 parts by weight of butyl acetate and 50 parts of xylene into the reaction vessel, and raise the temperature to 80°C;

[0031] 2) Then, 40 parts by weight of tert-butyl methacrylate, 20 parts of ethyl methacrylate, 10 parts of ethyl acrylate, 15 parts of hydroxypropyl acrylate, 1 part of tert-butyl peroxybenzoate and 3 Slowly drop the mixture of benzoyl peroxide into the reaction vessel and keep it warm for 0.5~1h;

[0032] 3) Then, 3 parts of ethyl methacrylate, 20 parts of 2-ethylhexyl acrylate, 20 parts of butyl acrylate, 5 parts of hydroxypropyl acrylate and 3 parts of initiator benzoyl peroxide The mixture was slowly added dropwise into the reaction vessel and kept warm for 1~2h;

[0033] 4) Finally, the temperature of the material is lowered to below 70°C to obtain a hydroxyacrylic resin product.

Embodiment 3

[0035] 1) First, under the protection of inert gas argon, add 100 parts by weight of methyl butyl ketone into the reaction vessel, and raise the temperature to 150°C;

[0036] 2) Then, the parts by weight are 30 parts of cyclohexyl methacrylate, 15 parts of phenyl methacrylate, 25 parts of trimethylcyclohexyl methacrylate, 2 parts of propyl acrylate, 8 parts of hydroxybutyl acrylate, Slowly add a mixture of 1 part of maleic acid, 2 parts of fumaric acid and 6 dicumyl peroxide dropwise into the reaction vessel, and keep it warm for 0.5~1h;

[0037]3) Then, add 1 part of tert-butyl methacrylate, 30 parts of soft monomer lauryl acrylate, 8 parts of hydroxybutyl acrylate, 1 part of maleic acid, 3 parts of fumaric acid and 5 parts A mixture of tert-butyl peroxybenzoate was slowly added dropwise into the reaction vessel, and kept warm for 1~2h;

[0038] 4) Finally, the temperature of the material is lowered to below 70°C to obtain a hydroxyacrylic resin product.

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Abstract

The invention relates to a preparation method of high-reaction-activity hydroxyl acrylic resin. According to the invention, a solvent in a reactor is heated to a preset temperature under the protection of an inert gas; a mixture of a monomer component A with hard monomer as a main component (and comprising a small amount of soft monomer, hydroxyl monomer and carboxyl monomer) and an initiation agent is slowly added; a reaction is carried out for a certain period of time with maintained temperature; a mixture of a monomer component B with soft monomer as a main component (and comprising a small amount of hard monomer, hydroxyl monomer and carboxyl monomer) and an initiation agent is slowly added; and reaction is carried out for a certain period of time with maintained temperature, such that acrylic resin comprising hydroxyl is obtained. The invention has the characteristic that common monomers are adopted, and only the synthesis process is changed wherein monomer dropping sequence is changed, such that resin molecular structure is substantially changed, and the synthesized hydroxyl acrylic resin shows high reaction activity during a curing reaction. The method provided by the invention also has the advantages of low cost, simple process, and suitability for industrialized productions.

Description

technical field [0001] The present invention relates to a preparation method of hydroxy acrylic resin, in particular to a method of adopting the method of "dropping monomers step by step" and using conventional monomers as raw materials to prepare hydroxy acrylic resin with high reactivity and excellent comprehensive performance . Background technique [0002] Hydroxy acrylic resin refers to the acrylic resin with hydroxyl groups on the molecular chain. After being cured by polyisocyanate or amino resin, hydroxy acrylic resin has high hardness and excellent weather resistance, acid and alkali resistance, solvent resistance, impact resistance, adhesion and other properties. , is widely used in the coating of automobiles, furniture, ships and aircrafts, mainly for protection and decoration. [0003] The drying speed of hydroxyacrylic resin coatings is one of the important properties concerned in the field of automotive coatings. The two-component acrylic polyurethane coating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F212/08C08F220/32C08F220/28C08F220/06C08F222/02C08F2/06C09D175/04
Inventor 井新利马晓阳辜朝辉
Owner XI AN JIAOTONG UNIV
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