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Polyester modified fluoro acrylic resin, and preparation method and coating thereof

A technology for modification of fluoroacrylic resin and polyester, which is applied in the field of polyester modified fluoroacrylic resin and its preparation for coatings for helicopter skin materials, and can solve the problem that the comprehensive performance of the resin is difficult to meet the design requirements.

Active Publication Date: 2011-09-21
ZHEJIANG YUTONG NEW MATERIAL
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Problems solved by technology

At present, there are very few studies on polyester-modified fluoroacrylic resins, and Wen Dijiang et al. published in "New Building Materials" 2008, No. 4, page 34, "Acrylic acid fluorine-containing ester modified unsaturated polyester resin". The resin in the article "Research" is made by pouring at room temperature and heat-curing. It is difficult for such a resin to meet the design requirements for its comprehensive properties.

Method used

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  • Polyester modified fluoro acrylic resin, and preparation method and coating thereof

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Embodiment 1

[0036] Preparation of polyester precursors. Put 235 grams of neopentyl glycol, 74 grams of trimethylolpropane, 163 grams of phthalic anhydride, 183 grams of isophthalic acid, 33 grams of toluene, 1.5 grams of dibutyltin oxide, and 3.5 grams of anti-168 into the In the four-neck flask of the device, nitrogen gas was passed, the temperature was raised, and when the material was basically dissolved, stirring was started. Continue to raise the temperature and reflux for dehydration. Before the dehydration reaches 90% of the theoretical value [theoretical water amount is 66 grams], control the temperature at the top of the water separator to not exceed 100°C, and control the reaction temperature of the flask at 160-180°C; when the dehydration amount reaches the theoretical value When the amount of water is 90%, the temperature in the flask gradually increases, but does not exceed 210°C. When the dehydration amount is close to the theoretical value, take the material to measure the...

Embodiment 2

[0039] Varnish preparation. Prepare the coating with the polyester modified fluoroacrylic resin synthesized above, and the basic formula is as follows: polyester modified fluoroacrylic resin, 50 parts by weight; titanium dioxide, 27 parts; dispersant, 2 parts; leveling agent, 1 part; Anti-UV Absorber, 2 parts; Xylene, 10 parts; Isophorone, 5 parts; Propylene Glycol Methyl Ether Acetate, 3 parts. The curing agent adopts DESMODUR N-3390 HDI trimer curing agent. The ratio of white paint and curing agent is 100:25. The thickness of the coating is about 25 μm.

[0040] The prepared paint was tested on the skin material for helicopters, and the measured properties were as follows:

[0041]

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Abstract

The invention discloses polyester modified fluorine-containing acrylic resin, and a preparation method and a coating thereof. The polyester modified fluorine-containing acrylic resin is prepared by carrying out a polymerization reaction on a polyester precursor, a mixed monomer and an initiator in a mixed solvent, wherein the amount of the mixed monomer for reaction accounts for 56.7 percent of the total feeding amount; the mixed monomer comprises the following components by mass percentage of the mixed monomer: 4-8 percent of styrene, 18-22 percent of isobornyl thiocyanoacetate methacrylic acid, 13-17 percent of butyl methacrylate, 13-17 percent of hydroxyethyl methacrylate, 18-22 percent of butyl acrylate, 4-6 percent of methacrylic acid, 4-6 percent of versatic acid ethylene oxidic ester and 13-17 percent of fluorine-containing monomer. In the invention, the polyester precursor and an acrylic acid monomer solution are polymerized to obtain the polyester modified fluorine-containing acrylic resin with high solid components and the polyester modified fluorine-containing acrylic resin is prepared into a skin material which is specially tested to coat by using the coating; the result shows that the resin has excellent performance and is remarkably superior to fluorine-containing acrylic resin for preparing a skin material of a helicopter in the strong reflective characteristics, hardness, acid and alkali resistance, and the like.

Description

technical field [0001] The invention relates to the field of preparation of polyester-modified fluoroacrylic resins, in particular to polyester-modified fluoroacrylic resins for coatings for helicopter skin materials and a preparation method thereof. Background technique [0002] Fluorine-modified acrylic resin is superior to simple acrylic resin in terms of corrosion resistance, stain resistance, chemical resistance and outdoor long-term weather resistance. Therefore, the Chinese invention publication number is CN1923868A. Fluorine-modified acrylic resin is used in helicopters The manufacture of skin coatings has achieved very good results. With the improvement of coating requirements, in order to apply to a wider range of applications, such as marine climates, etc., it is necessary to continue to improve the overall quality of the resin, so it is possible to combine polyester with fluorine-modified acrylic resin to obtain more excellent performance. Resin material. At pr...

Claims

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Application Information

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IPC IPC(8): C08F283/02C09D151/08C09D7/12
Inventor 肖洪平黄小波李新华
Owner ZHEJIANG YUTONG NEW MATERIAL
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