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Preparation method of fouling resistant coating for highway barrier

A highway, stain-resistant technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor coating film leveling, high maintenance costs, easy to be polluted, loss of gloss and self-cleaning ability, etc. Improved weatherability, good adhesion, and improved self-cleaning and anti-fouling properties

Active Publication Date: 2014-02-05
浙江纳宝莱化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies in the prior art, in order to solve the problems of high maintenance cost of traditional expressway guardrails, poor leveling of the coating film, susceptibility to pollution and loss of light, and weak self-cleaning ability, the purpose of the present invention is to provide a A method of preparing a stain-resistant expressway guardrail coating with acrylic acid aqueous dispersion and nano-titanium dioxide dispersion slurry

Method used

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  • Preparation method of fouling resistant coating for highway barrier
  • Preparation method of fouling resistant coating for highway barrier
  • Preparation method of fouling resistant coating for highway barrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The preparation of the hydroxyacrylic acid water dispersion a of embodiment 1 containing phosphate group

[0062] Add 1.00 kg of propylene glycol butyl ether and 1.00 kg of glycidyl tert-carbonate into a reactor equipped with a mechanical stirring device and a nitrogen device, and feed in nitrogen gas while raising the temperature until the temperature reaches 100°C; after the temperature stabilizes, start adding peroxide 275g tert-amyl acetate, 100g dodecyl mercaptan, 2.00kg methyl methacrylate, 2.80kg butyl acrylate, 1.50kg styrene, 2.03kg hydroxyethyl methacrylate, 670g acrylic acid, phosphoethyl methacrylate 1.50kg of ester monomer mixture, control the dropping speed of the monomer to make it drop within 2 to 3 hours; immediately add 25g of initiator tert-amyl peroxyacetate; continue to keep warm for 2 hours, measure the hydroxy acrylate The conversion rate of the resin is over 98%, and the hydroxy acrylic resin containing phosphate groups is obtained. When the tem...

Embodiment 2

[0065] The preparation of the hydroxyacrylic acid aqueous dispersion b of embodiment 2 containing phosphate group

[0066] Add 1.00kg of propylene glycol methyl ether acetate and 0.90kg of glycidyl tertiary carbonic acid ester into a reactor equipped with a mechanical stirring device and a nitrogen device, and feed in nitrogen gas while raising the temperature until the temperature reaches 100°C; after the temperature stabilizes, start to drop 275g tert-amyl peroxybenzoate, 100g mercaptoethanol, 2.50kg methyl methacrylate, 2.30kg butyl acrylate, 1.60kg styrene, 2.20kg hydroxyethyl methacrylate, 0.67kg methacrylic acid, methacrylic acid Propyl phosphate 0.80kg monomer mixture, control the drop rate of the monomer, so that it will be dripped within 2 to 3 hours; immediately add 25 g of initiator tert-amyl peroxybenzoate; continue to keep warm for 2 hours, measure The conversion rate of the hydroxyacrylic acid ester resin is over 98%, and the hydroxyacrylic acid resin containing ...

Embodiment 3

[0069] Example 3 Nano TiO 2 Preparation of dispersion slurry a

[0070]First, add 8.0Kg of water, 11.60kg of the acrylic acid aqueous dispersion containing phosphate groups in Example 1 to the dispersion kettle and make it evenly stirred, then add 400g of BYK-P104S dispersant to the kettle while gradually adding Hombitec RM220 Nano-TiO 2 Powder 14.00kg and propylene glycol methyl ether acetate 6.0Kg, to be nano-TiO 2 After the powder is added, the mixer stirs at a speed of 800r / min for about 30-40min until the agglomerated particles of the powder basically disappear; then use the gear stirring shaft to shear and stir at a speed of 4000r / min for 1-2 hours until the fineness reaches about 15μm Finally, the LMZ2 circulating agitation sand mill of Netzsch Company was used to grind the composite nanoparticle dispersion slurry for 2 hours under the conditions of zirconium bead particle size 0.4mm, zirconium bead loading amount of 70%, and rotation speed of 2500r / min. .

[0071] ...

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Abstract

The invention belongs to the field of fine chemical coatings, and discloses a preparation method of a fouling resistant coating for a highway barrier. The method comprises the following steps of: firstly preparing a phosphate-group-containing hydroxyl acrylic acid water dispersion, then preparing nanometer TiO2 dispersion slurry which is stable in performance, and finally preparing an ingredient A by dispersing and grinding the nanometer TiO2 dispersion slurry, the phosphate-group-containing hydroxyl acrylic acid water dispersion, an ultraviolet absorber, a solvent, a pigment filler and other auxiliaries in proportions. The coating for the highway barrier prepared from the ingredient A and an aliphatic isocyanate curing agent (ingredient B) can be easily coated thick; the coated film has the characteristics of good weather resistance, strong fouling resistance, and excellent corrosion resistance; the shortcomings that coating equipment needs to be fixed, a barrier plate needs to be repaired, the field maintenance is difficult, and the decoration performance is poor in the traditional coating construction for the highway are avoided; and therefore the coating can be widely applied to the highway barrier facilities of barrier plates, upright posts, bolts and the like, and also can be widely applied to the protection of large-sized construction machinery and other outdoor steel structures.

Description

technical field [0001] The invention belongs to the field of fine chemical coatings, and in particular relates to a preparation method of a stain-resistant highway guardrail coating. Background technique [0002] Highway guardrail is an important facility to maintain highway order and ensure driving safety. On the one hand, it plays a protective role in preventing cars from overturning and rushing out of the highway; . At present, the highway guardrail is in the harsh outdoor environment and has been exposed to sunlight, wind and rain erosion, seasonal temperature changes and environmental media. The anti-corrosion life of many guardrail coatings is greatly shortened, and the decorative appearance is reduced, which seriously reduces the protective performance of the guardrail. . At the same time, with the rapid development of my country's economy, the tonnage of domestic long-distance diesel transport vehicles is increasing, and the unburned hydrocarbons and other tiny par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/12C08F220/28C08F220/18C08F220/14C08F212/08C08F230/02C08F220/06C08F2/38
Inventor 邱玉清刘娅莉刘志平曹银祥
Owner 浙江纳宝莱化工科技有限公司
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