A kind of protective topcoat for bridge steel structure in plateau cold and drought area and preparation method thereof

A technology for steel structures in cold and arid regions, applied in the field of protective topcoats for bridge steel structures in plateau cold and arid regions and its preparation, can solve problems such as poor mechanical properties, reduced weather resistance, and blistering of coating films, and achieve high hardness and Effects of reactivity, improvement of chemical resistance, and reduction of the amount of additives used

Active Publication Date: 2019-08-30
西北永新涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a protective topcoat for bridge steel structures in plateau cold and arid areas, so as to solve the problems of reduced weather resistance, poor mechanical properties, blistering, cracking, falling off and discoloration of the coating film in the extreme environment of traditional topcoat products

Method used

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  • A kind of protective topcoat for bridge steel structure in plateau cold and drought area and preparation method thereof
  • A kind of protective topcoat for bridge steel structure in plateau cold and drought area and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of protective topcoat for steel structures of bridges in cold and arid plateau areas:

[0036] Component 1 Prepare raw materials according to the following dosage: ACR6730 high-hydroxy acrylic resin 60kg, CA6000 dispersant 0.8kg, pigment (rutile titanium dioxide) 22 kg, polytetrafluoroethylene powder SJF381 / SJF2037 kg, BYK-052 defoamer 0.06 kg, BYK-306 leveling agent 0.12 kg, vinyl tris(2,2,2-trifluoro)ethoxysilane 0.4 kg, dibutyltin dilaurate catalyst 0.01 kg, mixed solvent (100# solvent naphtha 7.61 kg and xylene 2 kg).

[0037] Component 2 Prepare raw materials according to the following dosage: HDI biuret 22A-75PX curing agent 30 kg, HDI trimer HT-75B curing agent 25 kg, IPDI trimer Desmodur Z4470MPA / X curing agent 8 kg, polyester resin 8 kg, propylene glycol methyl ether acetate 16 kg, sec-butyl acetate 13 kg.

[0038] The preparation method comprises the following steps:

[0039] The preparation method of component one:

[0040] A. Add two-thirds o...

Embodiment 2

[0049] Preparation of protective topcoat for steel structures of bridges in cold and arid plateau areas:

[0050] Component 1 Prepare raw materials according to the following dosage: Setalux1161 high-hydroxy acrylic resin 59 kg, BYK-2025 dispersant 1.5 kg, pigments (rutile titanium dioxide, carbon black and iron oxide red) 21 kg, polytetrafluoroethylene powder 8 kg , BYK-052 defoamer 0.05 kg, 837 leveling agent 0.1 kg, vinyl tris(2,2,2-trifluoro)ethoxysilane 0.5 kg, dibutyltin dilaurate catalyst 0.02 kg, mixed solvent (100 # solvent oil 7 kg and xylene 3 kg).

[0051] Component 2 prepare raw materials according to the following dosage: HDI biuret 22A-75PX curing agent 35 kg, HDI trimer HT-75B curing agent 22 kg, IPDI trimer Desmodur Z4470MPA / X curing agent 7 kg, polyester resin 10 kg, propylene glycol methyl ether acetate 15 kg, sec-butyl acetate 11 kg.

[0052] The preparation method comprises the following steps:

[0053] The preparation method of component one:

[0054]...

Embodiment 3

[0063] Preparation of protective topcoat for steel structures of bridges in cold and arid plateau areas:

[0064] Component 1 Prepare raw materials according to the following dosage: 58 kg of BS962 high-hydroxyl acrylic resin, 1.2 kg of BYK-2025 dispersant, 24 kg of pigments (rutile titanium dioxide, carbon black and medium chrome yellow), 5 kg of polytetrafluoroethylene micropowder , 6800 defoamer 0.1kg, BYK-306 leveling agent 0.2 kg, vinyl tris(2,2,2-trifluoro)ethoxysilane 0.3 kg, dibutyltin dilaurate catalyst 0.02 kg, mixed solvent (100 # solvent oil 9 kg and xylene 2.18 kg).

[0065] Component 2 prepare raw materials according to the following amount: HDI biuret 22A-75PX curing agent 33 kg, HDI trimer HT-75B curing agent 26 kg, IPDI trimer Desmodur Z4470MPA / X curing agent 5 kg, polyester resin 9 kg, propylene glycol methyl ether acetate 12 kg, sec-butyl acetate 15 kg.

[0066] The preparation method comprises the following steps:

[0067] The preparation method of compo...

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Abstract

The invention discloses protective finish paint for steel structures of bridges in highland cold and arid regions and a preparation method of the protective finish paint and belongs to the field of chemical industry, aiming at solving the problems of a traditional finish paint product that the weather resistance is reduced under an extreme environment, the mechanical property becomes poorer and acoating film is foamed, cracked, peeled and discolored. The protective finish paint for the steel structures of the bridges in the highland cold and arid regions is prepared from two components, wherein the component I is prepared from the following raw materials in parts by mass: 58 to 60 parts of high hydroxyl acrylic resin, 0.8 to 1.5 parts of a dispersant, 21 to 24 parts of a pigment, 5 to 8 parts of polytetrafluoroethylene micro-powder, 0.05 to 0.1 part of a de-foaming agent, 0.1 to 0.2 part of a flatting agent, 0.3 to 0.5 part of fluoro-substituted triethoxy methylsilane, 0.01 to 0.02 part of a dibutyltin dilaurate catalyst and 9 to 12 parts of a mixed solvent; the component II is prepared from the following raw materials in parts by mass: a curing agent, polyester resin, propylene glycol methyl ether acetate and sec-butyl acetate. The protective finish paint disclosed by the invention has excellent fullness, color and luster, chemical resistance, low-temprature mechanical properties and weather resistance.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a protective topcoat for steel structures of bridges in plateau cold and arid regions and a preparation method thereof. Background technique [0002] With the continuous innovation of science and technology and the rapid development of the road and bridge industry, steel structure bridges are widely used in bridge construction due to their unique mechanical properties, strong overburden capacity, and convenient installation. However, due to the influence of climate and other conditions, the steel structure of the bridge is easily corroded when exposed to the outside for a long time, which affects the stability of the steel structure of the bridge, which in turn affects the service life and number of years of the bridge, and even becomes a major safety hazard. Coating is a kind of polymer material that is applied to the base material to protect and decorate after formi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D127/18C09D175/06C09D5/08C09D7/61C09D7/63
Inventor 李彩虹鲁钰王海彤王乃迪李华明许玉霞
Owner 西北永新涂料有限公司
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