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A kind of preparation method of fluorine-containing acrylate copolymer leveling agent

An acrylate and logistics technology, applied in the field of leveling agents, can solve the problems of poor controllability and prone to explosion, and achieve the effect of narrow molecular weight distribution, good effect and controllable molecular weight

Inactive Publication Date: 2017-11-21
韶关欧文化学工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the free radical polymerization reaction is to initiate free radicals by heating, the free radicals are quickly initiated and grown, and a large amount of heat is released, and implosion is prone to occur during the production process, the controllability is poor, and there is a certain risk

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] The embodiment of the present invention discloses a preparation method of a fluorine-containing acrylate copolymer leveling agent, which includes the following steps: under the action of a metal coordination catalyst, the acrylate monomer and the fluorine-containing acrylate monomer are prepared in a solvent position polymerization reaction, remove the solvent under reduced pressure, and then mix with additives to obtain fluorine-containing acrylate copolymer leveling agent, and the metal coordination catalyst is rare earth metal naphthenate / alkyl aluminum, rare earth metal phosphate / alkyl One or more of aluminum, rare earth metal acetylacetonate / aluminum alkyl, transition metal naphthenate / aluminum alkyl, transition metal phosphate / aluminum alkyl and transition metal acetylacetonate / aluminum alkyl; The acrylate monomer is one or more of methyl methacrylate, ethyl methacrylate, propyl methacrylate and butyl methacrylate; the fluorine-containing acrylate monomer is hexafl...

Embodiment 1

[0030] (1) Put the complex of 4g Nd naphthenate and 4mL trimethylaluminum at 80°C for 0.5h.

[0031] (2) Use a syringe to transfer all the catalysts of the complex in (1) into a 1000ml clean three-neck flask containing 300 g methyl methacrylate, 20 g hexafluorobutyl acrylate and 320 g toluene under nitrogen protection.

[0032](3) Under the protection of nitrogen, polymerize at 60°C for 6 hours, then remove toluene and unreacted monomers under reduced pressure at 0.08MPa and 80°C to obtain 290 g of product with a viscosity of 1500mpa·s and a molecular weight of 8.5 by GPC ×10 4 , molecular weight distribution index 3.6. Mix it with toluene and xylene at a mass ratio of 1:1 to make a solid content of 50%, and make sample 1.

Embodiment 2

[0034] (1) The complex of 4g La naphthenate and 6mL triisobutylaluminum was aged at 90°C for 0.5h.

[0035] (2) Use a syringe to transfer all the catalysts of the complex in (1) into a nitrogen-protected container containing 200 g ethyl methacrylate, 100 g propyl methacrylate, 20 g hexafluorobutyl methacrylate, and 320 g tetrahydrofuran 1000ml clean three-neck bottle.

[0036] (3) Under the protection of nitrogen, polymerize at 40°C for 12 hours, then remove toluene and unreacted monomers under reduced pressure at 0.09MPa and 80°C to obtain 280 g of product with a viscosity of 1200mpa·s and a molecular weight of 7.4 by GPC ×10 4 , molecular weight distribution index 2.75. Prepare sample 2 by using toluene and trimethylbenzene with a mass ratio of 1:1 to make the solid content 30%.

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Abstract

The invention provides a preparation method of a fluorinated acrylate copolymer leveling agent. The preparation method comprises that an acrylate monomer and a fluorinated acrylate monomer undergo a coordination polymerization reaction in a solvent in the presence of a rare earth metal coordination catalyst or a transition metal coordination catalyst, the reaction solvent is removed through pressure reduction and the leveling agent is prepared from the reaction product and an auxiliary agent according to a certain ratio. Compared with the prior art, the preparation method utilizes the rare earth metal coordination catalyst or the transition metal coordination catalyst with high activity, has mild polymerization conditions and solves the problem of implosion in the free radical polymerization. The fluorinated acrylate copolymer leveling agent has controllable molecular weight, narrow molecular weight distribution and has good leveling effects.

Description

technical field [0001] The invention relates to the technical field of leveling agents, in particular to a preparation method of a fluorine-containing acrylate copolymer leveling agent. Background technique [0002] Paint is an organic substance in a fluid state or a powder state, which can evenly cover the surface of an object and firmly adhere to the surface of an object. Coatings can not only protect and decorate, but also have special functions such as insulation, conductivity, anti-static, temperature display, mildew resistance, and sterilization. They are widely used in various fields such as home appliances, machinery, electronics, construction, chemicals, aerospace, and mining metallurgy. . No matter what kind of coating method is used for coating, after construction, there will be a film-forming process of solvent evaporation and polymer flow. Due to solvent evaporation and different wetting degrees between polymer and substrate, the paint film will often have a te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/22C08F2/06C09D7/06C09D7/47
Inventor 来国桥
Owner 韶关欧文化学工业有限公司