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Weather-resistant nano-composite gel coat and preparation method thereof

A nano-composite adhesive and weather-resistant technology, which is applied in dyeing organosilicon compound treatment, polyester coating, fibrous filler, etc., can solve the problem that the weather resistance of the gel coat cannot be significantly enhanced, the amount of addition should not be too much, and the viscosity of the gel coat can be solved. problems such as increase

Active Publication Date: 2014-07-23
浙江倍斯特制冷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such problems will also appear in the gel coat modified by nano-ZnO, so the addition of nano-ZnO in the gel coat should not be too much, otherwise it will cause the viscosity of the gel coat to increase (thickening effect), but this is also harmful to the gel coat. The weather resistance of the clothing can not be significantly enhanced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1), surface modification of nano-ZnO (that is, the preparation method of modified nano-ZnO):

[0031] Weigh 100g of nano-ZnO (particle size 20nm) and add it to 200g of deionized water, stir at high speed for 10 minutes, add 20g of γ-methacryloxypropyltrimethoxysilane, and use 10% (weight ratio) HCl to adjust The pH of the system was 4, then the temperature was raised to 50°C, and the temperature was kept stirring for 3 hours, filtered, and the resulting filter cake was vacuum-dried to constant weight at room temperature; the modified nano-ZnO was obtained.

[0032] 2) Preparation of weather-resistant nanocomposite gel coat

[0033] (1) Add 100 parts of o-phthalic-neopentyl glycol type unsaturated polyester resin into the dispersion kettle, add 8 parts of talc powder, 5 parts of titanium dioxide under stirring, thixotropic agent - gas phase SiO 2 (specific surface area 150m 2 / g) 3 parts, thixotropic stabilizer---PR6000.2 parts; stir for 30 minutes; thus achieve unifor...

Embodiment 2

[0054] 1) Surface modification of nano ZnO

[0055] Weigh 100g of nano-ZnO (particle size 40nm) and add it to 200g of deionized water, stir at high speed for 20 minutes, add 50g of γ-methacryloxypropyltrimethoxysilane, and use 10% (weight ratio) HCl to adjust The pH of the system was 4, then the temperature was raised to 70°C, and the temperature was kept stirring for 1 hour, filtered, and the resulting filter cake was vacuum-dried to constant weight at room temperature; the modified nano-ZnO was obtained.

[0056] 2) Preparation of weather-resistant nanocomposite gel coat

[0057] (1) Add 100 parts of m-benzene-neopentyl glycol type unsaturated polyester resin into the dispersion kettle, add 6 parts of talc powder, 4 parts of titanium dioxide under stirring, thixotropic agent --- gas phase SiO 2 (specific surface area 380m 2 / g) 2 parts, thixotropic stabilizer----PR6000.1 part; stir for 30 minutes to achieve uniform dispersion;

[0058] (2), 15 parts of modified nanometer ...

Embodiment 3

[0070] 1), surface modification of nano ZnO:

[0071] Weigh 100g of nano-ZnO (particle size 60nm) in 200g of deionized water, add 50g of vinyltriethoxysilane after high-speed stirring for 20 minutes, and use 10% (weight ratio) HCl to adjust the pH of the system to 4, and then heat up to 50 ℃, and keep the temperature to stir for 2 hours, filter, and vacuum-dry the obtained filter cake at room temperature to constant weight; obtain the modified nano-ZnO.

[0072] 2) Preparation of weather-resistant nanocomposite gel coat

[0073] (1) Add 100 parts of m-benzene-neopentyl glycol type unsaturated polyester resin into the dispersion kettle, add 5 parts of talc powder, 3 parts of titanium dioxide under stirring, thixotropic agent --- gas phase SiO 2 (specific surface area 250m 2 / g) 1 part, thixotropic stabilizer --- PR6000.2 parts; stirring time 30 minutes, so as to achieve uniform dispersion;

[0074] (2), 25 parts of modified nanometer ZnO are added in 25 parts of styrene, aft...

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Abstract

The invention discloses a weather-resistant nano-composite gel coat. The weather-resistant nano-composite gel coat consists of the following components in parts by weight: 100 parts of unsaturated polyester resin, 10-30 parts of styrene, 10-25 parts of modified nano ZnO, 5-8 parts of talcum powder, 3-5 parts of titanium dioxide, 1-3 parts of thixotropic agent, 0.1-0.2 part of thixotropic stabilizer, 0.4-1 part of surface additive, 0-10 parts of mill base and 0.1-0.4 part of accelerant. The invention also provides a preparation method of the weather-resistant nano-composite gel coat. The method comprises the following step of 1) adding the talcum powder, the titanium dioxide, the thixotropic stabilizer and the thixotropic agent sequentially to the unsaturated polyester resin; 2), adding the modified nano ZnO into styrene, dispersing at a high speed and adding to the mixture obtained in the step 1); and 3), adding the mill base, the surface additive and the accelerant into the mixture obtained in the step 2). The weather resistant nano-composite gel coat is mainly used for the surface of the glass reinforced plastics of the cooling tower.

Description

technical field [0001] The invention relates to a weather-resistant nano-composite gel coat and a preparation method thereof. The weather-resistant nano-composite gel coat is mainly used on the surface of glass fiber reinforced plastics of cooling towers. Background technique [0002] Cooling towers are commonly used equipment in industrial circulating water, and are often used in steel factories, printing and dyeing factories, pharmaceutical factories, nuclear power plants, air conditioners, cold storage, chemical fiber, petroleum and other fields. At present, the commonly used cooling tower body is generally made of FRP. In order to improve the appearance quality of FRP and protect the material of FRP structural layer from corrosion by external media, a layer of gel coat is often coated on the surface of FRP. Gel coat is a special application of unsaturated polyester resin, its main component is polymer material, so when it is often exposed to various environments such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/06C09D7/12C09C1/04C09C3/12
Inventor 何守先
Owner 浙江倍斯特制冷科技有限公司
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