Dedicated epoxy powder paint for steel strand with thick coating and method for preparing same
A technology of epoxy powder and steel strand, which is applied in powder coatings, epoxy resin coatings, coatings, etc., can solve the problems of high cost and can not meet the requirements of the thickness of epoxy coating film on the outer surface of steel strands. The effect of prolonging service life, improving anti-aging ability and high film strength
Inactive Publication Date: 2009-09-09
周师岳 +1
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Problems solved by technology
Domestic major projects such as bridge suspension cables are used for anti-rust and anti-corrosion protective layer coatings, which generally use imported products. Although the price is expensive and the cost is high, it still cannot meet the requirements for the thickness of the epoxy coating film on the outer surface of the steel strand.
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[0019] 1. Preparation of rubber toughening agent
[0020] Disperse highly hydrophobic silica powder in water to make an aqueous dispersion containing more than 90% silica powder. The flowing powder still maintains the original physical state, and fine water droplets are dispersed in the matrix of continuous silica powder. Each droplet is formed by Surrounded by thousands of silica powder particles composed of many smaller primary particles. Then the rubber latex is uniformly dispersed in the above water dispersion of dispersed silica powder, dried and dehydrated to form a rubber silica powder toughening agent (solid particles). For example: nitrile latex with a solid content of 60% can be prepared as a rubber silica powder toughening agent with a bulk density of about 0.35g / cm3 by using an aqueous dispersion containing 10% silica powder.
[0021] 2. Preparation of epoxy powder coatings for thick coated steel strands
[0022] a, by weight ratio: 65% bisphenol A epoxy resin is...
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Abstract
The invention discloses an epoxy powder coating specially used for thick-coated steel strands and a preparation method thereof. Curing accelerator, 8-10wt% rubber toughening agent, 2-10wt% pigment and filler, 2-4wt% leveling agent, 0.5-1wt% defoamer, after mixing evenly, melt and extrude in a twin-screw extruder After being released, it is made by pressing, crushing and grinding. The invention has scientific formula, advanced and simple process. The prepared thick-coated epoxy powder coating for steel strands is suitable for special coating materials for filled steel strands. The coating film has high toughness, and the thickness of the coating film is 400-1100 microns. It is also suitable for anti-corrosion and wear-resistant protection of steel bars in various reinforced concrete projects, improving the anti-aging ability of steel bars and prolonging their service life.
Description
technical field [0001] The invention relates to a composition of epoxy powder paint specially used for thick-coated steel strands, and belongs to the technical field of epoxy powder paint. Background technique [0002] With the rapid development of modern construction, bridge construction projects, which are an important part of traffic and road construction, are getting bigger and bigger, especially for cross-river, river-crossing, and sea-crossing road bridges. The use of strength steel strands is increasing. At the same time, as highways and high-rise building reinforced concrete begin to strictly require anti-rust and anti-corrosion treatment, a large number of high-quality coatings are also required. In order to improve the anti-corrosion, wear-resistant and anti-aging capabilities of the steel strands used for bridge suspension cables and concrete reinforcement in construction projects, and prolong the service life, the single-strand steel wires of the steel strands a...
Claims
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IPC IPC(8): C09D163/00C09D5/03B05D7/20
Inventor 周师岳
Owner 周师岳