Special spraying type corrosion-proof sealant for suspension bridge section steel anchoring system

An anchoring system and suspension bridge technology, used in the field of sealants and preservatives, can solve the problems of many bubbles, low tensile strength, low modulus, etc., and achieve the effect of low viscosity and high thixotropy

Inactive Publication Date: 2017-05-31
JIANGSU CUMT DAZHENG SURFACE ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese invention patent CN104294761A discloses a protection method for the main cable anchorage system of a suspension bridge, a protection sealant and a preparation method thereof, wherein the protection sealant is a two-component low modulus polysulfide sealant, and the sealant is a A polysulfide sealant with ultra-low modulus and ultra-long elongation, which has a certain protective effect on anchored steel, but the sealant has the following disadvantages: (1) Low cohesive mechanical strength, low tensile strength, and attached Low effort, especially easy to break during construction; (2) two-component mixing construction, colloidal appearance ugly, many bubbles; (3) low construction efficiency; (4) polysulfide sealant has a pungent smell, and the construction is friendly to workers insufficient
[0006] Chinese invention patent CN105442447A discloses an isolation and protection structure for a suspension bridge steel isolation system. This structure uses an environmentally friendly silane-modified polyether sealant, which has the characteristics of good comprehensive mechanical strength and good isolation and protection effect. The consistency is high, the construction of manual scraping is difficult, the work efficiency is low, and the appearance is ugly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: The spray type anticorrosion sealant of the present invention is prepared according to the following formula and process:

[0026] 1-1. Weigh raw materials: 35 kg of S203H silane-modified polyether resin from Kaneka Japan; 25 kg of polyether polyol with a molecular weight of 2000; 22 kg of U1S2 nano-active calcium carbonate; CRAY VALLEY SL polyamide rheology Auxiliary agent 8kg; Exxon Mobil D40 type hydrocarbon solvent 7.6kg; Ciba Refining Chemical Company 1010 type antioxidant 0.5kg; Ciba Company Tinuvin 326 type ultraviolet absorber 0.3kg.

[0027] 1-2. Mixing raw materials: Put the above raw materials together into a double planetary mixer, heat to 110°C, stir slowly (25-50rpm) for 100 minutes; vacuumize and heat to 110°C, stir at high speed (1000rpm) for 150 minutes, cool down to At 40°C, add 0.6kg of A-171 silane dehydrating agent from Momentive; stir slowly (250rpm) for 25 minutes, add 0.4kg of 1146 silane adhesion promoter from Evonik Degussa; stir ...

Embodiment 2

[0028] Embodiment 2: prepare the spray type anticorrosion sealant of the present invention according to following formula and process:

[0029] 2-1. Weigh raw materials: S203H silane-modified polyether resin 38 kg; 2500 molecular weight polyether polyol 21 kg; U1S2 nano-active calcium carbonate 20kg; CRAY VALLEY SL polyamide rheology additive 10kg; D40 8.1kg of type hydrocarbon solvent; 0.4kg of 1010 type anti-aging agent; 0.4kg of Tinuvin 326 type ultraviolet absorber.

[0030] 2-2. Mixing raw materials: Put the above raw materials together into a double planetary mixer, heat to 110°C, stir slowly (25-50rpm) for 100 minutes; vacuumize and heat to 110°C, stir at a high speed (1000rpm) for 150 minutes, cool down to 40°C, add 0.8kg of A-171 silane dehydrating agent; slowly stir (250rpm) for 25 minutes, add 0.8kg of 1146 type silane adhesion promoter; slowly stir (250rpm) for 25 minutes, add 0.5kg of chelated tin catalyst; After stirring (250rpm) for 25 minutes, the material is ...

Embodiment 3

[0032] Embodiment 3: The spray type anticorrosion sealant of the present invention is prepared according to the following formula and process:

[0033] 3-1. Weigh raw materials: S203H type silane modified polyether resin 25 kg; 3000 molecular weight polyether polyol 25 kg; U1S2 type nano-active calcium carbonate 25 kg; CRAY VALLEY SL type polyamide rheology additive 7 kg; D40 Type hydrocarbon solvent 15kg; Type 1010 antioxidant 0.5kg; Tinuvin 326 type UV absorber 0.5kg.

[0034] 3-2. Mixing raw materials: Put the above raw materials together into a double planetary mixer, heat to 110°C, stir slowly (25-50rpm) for 100 minutes; vacuumize and heat to 110°C, stir at a high speed (1000rpm) for 150 minutes, cool down to At 40°C, add 0.7kg of A-171 silane dehydrating agent, stir slowly (250rpm) for 25 minutes; add 0.7kg of 1146 type silane adhesion promoter, stir slowly (250rpm) for 25 minutes, add 0.6kg of chelated tin catalyst; slowly After stirring (250rpm) for 25 minutes, the ma...

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Abstract

The invention discloses a special spraying type corrosion-proof sealant for a suspension bridge section steel anchoring system. The special spraying type corrosion-proof sealant is prepared from the following raw materials in parts by weight: 20 to 45 parts of silicone-modified polyether resin, 10 to 30 parts of polyether polyol, 15 to 30 parts of nano modified calcium carbonate, 6 to 15 part of a rheological agent, 1 to 15 parts of a hydrocarbon solvent, 0.2 to 1.0 part of a dehydrating agent, 0.05 to 1.0 part of an adhesion promoter, 0.1 to 1 part of an ultraviolet absorbent, 0.1 to 1 part of an anti-ageing agent and 0.05 to 0.1 part of a catalyst. The product has the characteristics of low viscosity, high thixotropy, capability of being sprayed and the like, and is especially applicable to the field of isolation and protection of the bridge anchoring system.

Description

technical field [0001] The invention relates to an anti-corrosion sealant, in particular to a special spray-on anti-corrosion sealant for the steel anchorage system of a suspension bridge, which is specially suitable for the isolation and protection of the steel anchorage system of a suspension bridge, and is also suitable for sealing anticorrosion in the fields of transportation, ships, marine steel components, etc. , belongs to the technical field of preservatives and sealants. Background technique [0002] The anchorage system is pre-embedded at both ends of the suspension bridge, and after the concrete is poured, it will be used as the load-bearing structure of the suspension bridge. Due to its high stability, the section steel anchorage system has gradually become the most important form of anchorage system in recent years. Since the section steel anchorage system is located in the large-volume anchorage concrete and is in a humid environment for a long time, it cannot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D171/00C09D11/04C09D11/06C09D11/08
CPCC09D171/00C08K2201/011C08L2205/025C08L2205/03C09D11/04C09D11/06C09D11/08C08L71/00C08L77/00C08K13/06C08K9/04C08K9/06C08K2003/265
Inventor 倪雅李紫跃刘国彬赵青青王波周春侠高海棠王金明田有为周忠振
Owner JIANGSU CUMT DAZHENG SURFACE ENG TECH
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