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A kind of amino-terminated fluorine-containing prepolymer modified acrylate coating and preparation method thereof

A technology of acrylate and prepolymer, which is applied in the direction of coating, etc., can solve the problems of poor compatibility between fluorine-containing polymers and acrylate resins, the difficulty of compounding at the molecular level, and the increase in cost, and achieve the effect of low surface energy

Active Publication Date: 2019-03-22
国科广化(南雄)新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, two modification methods are mainly used: one is physical blending, but this method has the problem of poor compatibility between fluoropolymers and acrylate resins. When the solvent volatilizes or other polymers undergo crosslinking and curing, it is easy to Phase separation makes it difficult to achieve molecular level recombination; the second is to add small molecular fluorine-co

Method used

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  • A kind of amino-terminated fluorine-containing prepolymer modified acrylate coating and preparation method thereof
  • A kind of amino-terminated fluorine-containing prepolymer modified acrylate coating and preparation method thereof
  • A kind of amino-terminated fluorine-containing prepolymer modified acrylate coating and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0043] (1) Preparation of amino-terminated fluorine-containing prepolymer: Add 20 parts by mass of hexafluorobutyl methacrylate and 40 parts by mass of N,N-dimethylformamide into a container, heat up to 60°C, and add 1 part by mass of Cysteamine hydrochloride, 0.6 parts by mass of azobisisobutyronitrile, stirred and reacted for 8 hours, added triethylamine to make the pH = 8, then added 0.8 parts by mass of 37% formaldehyde aqueous solution, and stirred thoroughly for 1 hour to obtain The amino-terminated fluorine-containing prepolymer solution is obtained by distilling off the solvent under reduced pressure to obtain an amino-terminated fluorine-containing prepolymer. FT-IR (Bruker TENSOR27 (Germany) Fourier infrared spectrometer) has N-H single-peak absorption peak and C-N absorption peak at 3379~3558cm-1 and 1200cm-1, respectively, and 1H-NMR (deuterated chloroform as solvent) at 2.8ppm The proton absorption peak of N-H appears at , indicating that the end of the product is...

Embodiment 2

[0047] (1) Preparation of amino-terminated fluorine-containing prepolymer: Add 40 parts by mass of hexafluorobutyl methacrylate and 80 parts by mass of N,N-dimethylformamide into a container, heat up to 60°C, add 4 parts by mass of Mercaptoethylamine, 0.8 parts by mass of azobisisobutyronitrile, stirred and reacted for 9 hours, added triethylamine to make the pH = 8, and then added 2 parts by mass of 38% formaldehyde aqueous solution, and stirred thoroughly for 0.5 hours to obtain the terminal amino group A fluorine-containing prepolymer solution, and the solvent is distilled off under reduced pressure to obtain an amino-terminated fluorine-containing prepolymer. FT-IR (Bruker TENSOR27 (Germany) Fourier infrared spectrometer) has N-H single-peak absorption peak and C-N absorption peak at 3364~3458cm-1 and 1190cm-1 respectively, 1H-NMR (deuterated chloroform as solvent) at 2.8ppm The proton absorption peak of N-H appears at , indicating that the end of the product is an amino g...

Embodiment 3

[0051] (1) Preparation of amino-terminated fluorine-containing prepolymer: Add 30 parts by mass of hexafluorobutyl methacrylate and 60 parts by mass of N,N-dimethylformamide into a container, heat up to 110°C, and add 0.6 parts by mass of Mercaptoethylamine, 0.1 parts by mass of azobisisobutyronitrile, stirred and reacted for 9 hours, diisopropylethylamine was added to make the pH = 8, and 1.5 parts by mass of formaldehyde solution with a mass concentration of 40% was added, and after fully stirred for 2 hours, the obtained The amino-terminated fluorine-containing prepolymer solution is obtained by distilling off the solvent under reduced pressure to obtain an amino-terminated fluorine-containing prepolymer. FT-IR (Bruker TENSOR27 (Germany) Fourier infrared spectrometer) has N-H single-peak absorption peak and C-N absorption peak at 3364~3458cm-1 and 1190cm-1 respectively, 1H-NMR (deuterated chloroform as solvent) at 2.8ppm The proton absorption peak of N-H appears at , indica...

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Abstract

The invention discloses an amino-terminated fluorine-containing prepolymer modified acrylate coating and a preparation method thereof. The amino-terminated fluorine-containing prepolymer modified acrylate coating comprises 100 parts of amino-terminated fluorine-containing prepolymer modified acrylate resin, 0.1-2.5 parts of an antifoaming agent, 0.1-1 part of a leveling agent, 0.1-2.5 parts of a dispersant, 0.1-1.5 parts of a promoter, 0.1-50 parts of a filler and 20-50 parts of a solvent A. The amino-terminated fluorine-containing prepolymer modified acrylate coating is prepared through compounding an amino-terminated fluorine-containing prepolymer having a length-controllable fluorine-containing chain segment with acrylate resin, the high molecular weight and the fluorine content of the fluorine-containing prepolymer are controlled to make the fluorine-containing segment easily enriched to the air-coating surface of a cured coating and the fluorine content of the surface far higher than the fluorine content of the body, so the surface of the cured coating has low surface energy, acid and alkali resistance and other excellent performances.

Description

technical field [0001] The invention relates to the field of polymer coatings, in particular to an amino-terminated fluorine-containing prepolymer modified acrylate coating and a preparation method thereof. Background technique [0002] Acrylate resin has the advantages of good weather resistance, strong adhesion, high transparency, etc., and has strong adhesion to polar and non-polar surfaces, and is widely used in adhesives, leather, chemical fibers, coatings and other fields. However, acrylate resins have disadvantages such as water resistance, cold resistance, stain resistance, solvent resistance, and poor mechanical properties. Thermoplastic resins also have disadvantages such as low heat resistance and easy plastic deformation, which limit their further development. [0003] The fluorine atom has the characteristics of large electronegativity, small atomic radius, and low polarizability, which makes the fluorine atom have a special shielding effect and can effectively ...

Claims

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Application Information

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IPC IPC(8): C09D187/00C08G81/02
CPCC08G81/021C08L2201/10C09D187/005C08L1/14C08L83/04
Inventor 刘伟区林展聪王政芳
Owner 国科广化(南雄)新材料研究院有限公司
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