Preparation method for hydroxyl acrylic resin

A hydroxyacrylic acid and acrylate technology, applied in adhesive types, coatings, hydrocarbon copolymer adhesives, etc., can solve the problems of slow drying speed, high cost, short activation period, etc., to improve quality, Increased compatibility, smooth and even response

Active Publication Date: 2019-05-28
WANHUA CHEM BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of short activation period, slow drying speed and high cost in the prior art, the present invention provides a method for preparing hydroxyacrylic resin. The method selects the acrylic monomer in the raw material, and adopts segmental The method of dropping monomers and segmentally controlling temperature to prepare highly reactive hydroxyacrylic resin, the coating prepared by said hydroxyacrylic resin has a longer pot life, faster drying speed and lower cost, and Cured coatings have excellent properties

Method used

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  • Preparation method for hydroxyl acrylic resin
  • Preparation method for hydroxyl acrylic resin
  • Preparation method for hydroxyl acrylic resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] 1) Under nitrogen protection, add 40 parts by weight of butyl acetate into a four-necked flask equipped with a thermometer, stirring and condensing device, and stir to raise the temperature to 90°C;

[0080] 2) In another dropping device, after mixing 15 parts by weight of n-butyl methacrylate, 0.8 parts of hydroxyethyl methacrylate, and 0.05 parts of azobisisobutyronitrile, drop them at a constant speed The method is added into the reactor, the dropwise addition time is 3h, and the reaction system is kept at 90°C;

[0081] 3) Slowly warming up to 125°C, the parts by weight are 25 parts of isobornyl methacrylate, 16 parts of hydroxyethyl methacrylate, 1.5 parts of methacrylic acid and 1.5 parts of tert-butyl peroxybenzoate Mix evenly, add dropwise into the four-necked flask at a constant speed, dropwise for 4 hours, and keep warm for 4 hours after the dropwise addition;

[0082] 4) The temperature was lowered to 80° C., and the material was discharged to obtain the sam...

Embodiment 2

[0092] 1) Under nitrogen protection, add 40 parts by weight of xylene into a four-necked flask equipped with a thermometer, stirring and condensing device, and stir to raise the temperature to 100°C;

[0093] 2) In another dropping device, uniformly mix 8 parts by weight of n-butyl acrylate, 1.8 parts of hydroxypropyl methacrylate and 0.1 part of azobisisobutyronitrile, and drop them into a four-necked flask at a constant speed Within 4 hours of dropping time, the reaction system was kept at 100°C;

[0094] 3) Slowly warming up to 130°C, the parts by weight are 19.5 parts of styrene, 19.5 parts of methyl methacrylate, 10.2 parts of hydroxypropyl methacrylate, 0.5 parts of acrylic acid and 2.5 parts of benzoyl peroxide Mix evenly, add dropwise into the four-necked flask at a constant speed, dropwise for 4 hours, and keep warm for 4 hours after the dropwise addition;

[0095] 4) The temperature was lowered to 80° C., and the material was discharged to obtain the sample resin of...

Embodiment 3

[0107] 1) Under nitrogen protection, add 40 parts by weight of butyl acetate into a four-necked flask equipped with a thermometer, stirring and condensing device, and stir to raise the temperature to 90°C;

[0108] 2) In another dropping device, uniformly mix 8 parts by weight of 2-ethylhexyl methacrylate, 1.1 parts of hydroxyethyl acrylate and 0.18 parts of azobisisoheptanonitrile, and add dropwise at a constant speed In the four-necked flask, the dropwise addition time is 4h, and the reaction system is kept at 90°C;

[0109] 3) After slowly heating up to 125°C, add 15.4 parts by weight of n-butyl methacrylate, 20 parts of isobornyl acrylate, 12 parts of hydroxyethyl acrylate, 1 part of methacrylic acid and 2.3 parts of benzene peroxide Mix tert-butyl formate evenly, drop it into the four-necked flask at a constant speed, drop it for 3 hours, and keep it warm for 5 hours after the drop is completed;

[0110] 4) The temperature was lowered to 80° C., and the material was disc...

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Abstract

The invention provides a preparation method for hydroxylacrylic resin. According to the method, an acrylic monomer in a raw material is selected, and a method of dropwise adding the monomer in sections and controlling the temperature in sections is adopted to prepare the hydroxyl acrylic resin with high reaction activity. A coating prepared from the hydroxyl acrylic resin is relatively long in activation period, relatively rapid in drying speed and relatively low in cost; and the cured coating has excellent performance.

Description

technical field [0001] The invention relates to a preparation method of hydroxy acrylic resin, especially a preparation method of hydroxy acrylic resin with long pot life and high reactivity. Background technique [0002] Hydroxy acrylic resin is a kind of chemical raw material commonly used in coatings, which is mainly obtained by polymerizing (meth)acrylate monomers and hydroxyalkyl (meth)acrylate monomers in the presence of initiators. Resins, when used in the coatings industry, are usually combined with isocyanate curing agents. Among them, the drying speed of such two-component coatings is one of the important properties to be considered in coating applications. Taking automotive refinish coatings as an example, after spraying, automotive refinish coatings generally need to be cured at room temperature for 24 hours (commonly known as overnight polishing), or baked at 50-80°C for 30-60 minutes before polishing. This will cause inefficiency, but also cause a large energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/20C08F220/06C08F220/14C08F212/08C09D133/12C09D125/14C09D133/08C09J133/12C09J125/14C09J133/08
Inventor 高欣欣黄旭赵树茂张磊刘建敏张平
Owner WANHUA CHEM BEIJING
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