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Fluorine-silicon modified hydroxy acrylic resin and preparation method thereof

A technology modified by hydroxyacrylic acid and fluorosilicone, which is applied in the field of acrylic resin and its preparation, can solve the problems of poor low temperature resistance of polymers, poor wettability of fillers, and poor adhesion of substrates, etc., to improve weather resistance, Excellent durability and the effect of improving productivity

Active Publication Date: 2012-10-24
GUANGZHOU SUPER CHEM COATING CO LTDGUANGZHOU SUPER CHEM COATING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a major defect in fluorine-containing resin coatings
Due to the small radius of the main chain of the fluoropolymer and the large bond energy of the C-F bond, its adhesion to the substrate is extremely poor, and the wettability of the filler in the pigment is not good
However, the space in the main chain of fluorine-containing polymer is small, resulting in strong rigidity of the molecular chain, which makes the low temperature resistance of the polymer poor.

Method used

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preparation example Construction

[0036] The preparation method of fluorosilicon modified hydroxyacrylic resin of the present invention mainly comprises the following steps:

[0037] (1) Synthesis of fluorosilicone prepolymer:

[0038] a: Weigh the fluorinated silane monomer and organosilicon monomer according to the above ratio for later use;

[0039] b: Weigh absolute ethanol and water according to the molar ratio of 2-5:1, add 0.1-0.4% concentrated hydrochloric acid to the water to form an aqueous hydrochloric acid solution for later use;

[0040] c: Add absolute ethanol to a flask with a condenser, a thermometer and a stirrer, stir and heat to 30-40°C;

[0041] d: Add the fluorinated silane monomer and organosilicon monomer into the flask in step c, and evenly drop the hydrochloric acid aqueous solution in step b, stir evenly at 50-80°C for 2-5 hours, stop stirring after the reaction is complete ;

[0042] e: distill the solution obtained in step d at 100-140°C, and obtain a vinyl-terminated fluorosilicon...

Embodiment 1

[0051] The fluorosilicon-modified hydroxyacrylic resin of the present invention comprises a fluorinated silane monomer, an organosilicon monomer, an acrylate monomer and an initiator. Among them, the fluorinated silane monomers include dodecafluoroheptylpropyltrimethoxysilane and tridecafluorooctyltrimethoxysilane; and the organosilicon monomers include phenyltrichlorosilane, vinyltrichlorosilane, methyltrimethoxysilane oxysilane, methyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, and gamma-methacryloxytriethoxysilane; while acrylate monomers include methyl Butyl acrylate, methyl methacrylate, isobornyl methacrylate, 2-hydroxyethyl acrylate and 2-hydroxypropyl acrylate; initiators are azobisisobutyronitrile, fluorinated silane monomers and organic Silicon monomers undergo hydrolysis and condensation reactions to form vinyl-terminated fluorosilicon prepolymers, and fluorosilicon prepolymers and acrylate monomers undergo polymerization reactions to form fluorosi...

Embodiment 2

[0066] The fluorosilicon-modified hydroxyacrylic resin of the present invention comprises a fluorinated silane monomer, an organosilicon monomer, an acrylate monomer and an initiator. Among them, the fluorinated silane monomers include dodecafluoroheptylpropyltrimethoxysilane, tridecafluorooctyltrimethoxysilane and dodecaheptylpropylmethyldimethoxysilane; and the silicone monomers include benzene Trichlorosilane, Vinyltrichlorosilane, Methyltrimethoxysilane, Methyltriethoxysilane, Diphenyldimethoxysilane, Vinyltrimethoxysilane, Vinyltriethoxysilane, γ-methacryloxytrimethoxysilane and γ-methacryloxytriethoxysilane; while acrylate monomers include butyl acrylate, butyl methacrylate, methyl methacrylate, Isobornyl methacrylate, 2-hydroxyethyl acrylate, and 2-hydroxypropyl acrylate; initiators include azobisisobutyronitrile and benzoyl peroxide, fluorinated silane monomers, and silicone monomers Hydrolysis and condensation reactions form vinyl-terminated fluorosilicon prepolymers...

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PUM

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Abstract

The invention discloses a fluorine-silicon modified hydroxy acrylic resin which comprises, by mass, 10 to 20 parts of fluorinated silane monomers, 30 to 70 parts of organosilicon monomers, 80 to 120 parts of acrylate monomers and 1 to 5 parts of an initiator, wherein the fluorinated silane monomers and the organosilicon monomers undergo hydrolysis and a condensation reaction to form a vinyl-terminiated fluorine-silicon performed polymer, the fluorine-silicon performed polymer and the acrylate monomers are subjected to polymerization so as to form a fluorine-silicon hydroxy acrylic polymer, and the mole ratio of the fluorine-silicon performed polymer to the acrylate monomers is 1: 6-8. The fluorine-silicon modified hydroxy acrylic resin provided in the invention has excellent chemical stability, weatherability, temperature-change resistance and gloss retention performance.

Description

technical field [0001] The invention relates to an acrylic resin and a preparation method thereof, in particular to a fluorosilicon-modified hydroxy acrylic resin and a preparation method thereof. Background technique [0002] Acrylic polymers have the advantages of excellent chemical resistance, fast drying of paint film, and convenient construction, and are widely used in automobiles, electrical appliances, machinery, construction and other fields. However, due to the influence of the chain segment characteristics of the acrylic polymer itself, its disadvantages such as poor hardness, solvent resistance, and poor high and low temperature resistance are very obvious, which greatly limits the application range of the acrylic polymer. For this reason, modified acrylic resins have developed rapidly in recent years, among which fluorosilicone modification is particularly prominent. Fluorine is the most electronegative element in the periodic table of elements. The main chain o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/28C08F230/08
Inventor 范栋岩刘非谢亦富李国荣纪凤龙
Owner GUANGZHOU SUPER CHEM COATING CO LTDGUANGZHOU SUPER CHEM COATING CO LTD
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