Method for preparing high-adhesive force solid acrylic resin modified by organosilane

A solid acrylic and acrylic resin technology, used in coatings, powder coatings, polyester coatings, etc., can solve the problems of poor adhesion of powder coatings, decreased coating storage, inconvenient operation, etc., to improve adhesion and water resistance. effect of cooking

Active Publication Date: 2014-04-02
六安捷通达新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for some special substrates such as glass, stainless steel, galvanized sheet, ceramics, etc., the usual powder coatings have poor adhesion, which affects the application properties of the coating film such as weather resistance and water boiling resistance, and limits the application properties of powder coatings. Coating application range
At present, organic silanes can be introduced into powder coatings through physical methods, usually by using ordinary liquid silane coupling agents, and adding them into powder coatings through filler dispersion. This method can improve the adhesion of coatings to a certain extent, but the operation It is inconvenient, and often reduces the storage performance of the coating, and even has a certain adverse effect on the solvent resistance and water boiling resistance of the coating film

Method used

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  • Method for preparing high-adhesive force solid acrylic resin modified by organosilane
  • Method for preparing high-adhesive force solid acrylic resin modified by organosilane
  • Method for preparing high-adhesive force solid acrylic resin modified by organosilane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 250g of toluene to a 1000ml four-necked flask equipped with a stirring device, condenser, dropping funnel, thermometer and nitrogen inlet, fill it with nitrogen, heat to reflux, drop the monomer mixture (see Table 1 for the formula), drop Adding time is controlled at 3.5 hours. After the dropwise addition is completed, cool down to 70°C and keep the temperature for 3 hours. Dissolve 3g of 2,2′-azobisisobutyronitrile with 20g of toluene and add it to the reaction system at one time. Insulated and refluxed for 1.5 hours. Use normal pressure distillation to remove most of the solvent. When a small amount of solvent remains, you can use reduced pressure distillation to remove the solvent, discharge while hot, cool, and pulverize. Finally, the product silane-modified acrylic resin 1 was obtained.

Embodiment 2-3

[0020] Example 2-3 The preparation method is the same as that of Example 1. The ratio of the monomer mixture is shown in Table 1. Silane-modified acrylic resins 2 and 3 were prepared respectively. The experimental results are shown in Table 1.

[0021] Table 1

[0022]

[0023] *:Vinyltrichlorosilane

Embodiment 4

[0025] Add 250g of toluene to a 1000ml four-necked flask equipped with a stirring device, condenser, dropping funnel, thermometer and nitrogen inlet, fill it with nitrogen, heat to reflux, drop the monomer mixture (see Table 2 for the formula), drop Adding time is controlled at 3.5 hours. After the dropwise addition is completed, cool down to 90°C and keep the reaction at this temperature for 3 hours. Dissolve 2g of tert-butyl peroxide in 20g of toluene and add it to the reaction system at one time, then keep warm and reflux for 1 hour. Use normal pressure distillation to remove most of the solvent. When a small amount of solvent remains, you can use reduced pressure distillation to remove the solvent, discharge while hot, cool, and pulverize. Finally, a silane-modified acrylic resin 4 was obtained. The experimental results are shown in Table 2.

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Abstract

The invention discloses a method for preparing high-adhesive force solid acrylic resin modified by organosilane. The method disclosed by the invention can be used for preparing the high-adhesive force solid acrylic resin by introducing an organosilane monomer into acrylic resin through a chemically bonding mode; the prepared modified solid acrylic resin as an additive is added to a powder coating system, can outstandingly enhance the adhesive force of a powder coating layer on a substrate and specific substrates, such as a galvanized plate and stainless steel, especially, cannot influence the storage stability of the powder coating due to excellent self characteristics of the solid acrylic resin and achieves certain improvement on the solvent resistance and boiling resistance of the powder coating layer.

Description

technical field [0001] The invention relates to the technical field of paint additives, in particular to a preparation method of organosilane-modified high-adhesion solid acrylic resin. Background technique [0002] Compared with liquid coatings, powder coatings do not use solvents, so there is no solvent volatilization during the application process, and they have the advantages of high recycling rate, easy operation, high productivity, and fast drying of coating films. Therefore, they are widely used in automobiles, household appliances, machinery, construction, and ships. And other fields are widely used to replace liquid paint. However, for some special substrates such as glass, stainless steel, galvanized sheet, ceramics, etc., the usual powder coatings have poor adhesion, which affects the application properties of the coating film such as weather resistance and water boiling resistance, and limits the application properties of powder coatings. The scope of applicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F230/08C08F220/14C08F220/18C08F212/08C09D7/12C09D5/03C09D167/00
Inventor 鲍远志翁世兵
Owner 六安捷通达新材料有限公司
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