KR100369493B1 - Waterproof agent for bridges - Google Patents

Abstract

Methane 4,4 'diisocyanate, which is a curing agent commonly used in the high boiling aromatic solvents as described above, is mainly based on dissolving N, N, N, N-tetrakis (2-hydroxypropyl) ethylenediamine in a high boiling aromatic solvent. The mixture of the curing agent mixture dissolved in MDI 1: 1 with the main material was first applied, and the polypropylene glycol, triisopropanolamine, 1.4-butyldiol, and aromatic oil (new oil) were used as the main material. As a chaebol coating of a mixture of aromatics with MDI, the same curing agent as above, in a ratio of 1: 1 with the above-mentioned main body, it has good waterproofness and waterproofing of bridge deck with excellent adhesive strength and construction ability. That's it.

Description

Waterproofing agent for bridges

The present invention relates to waterproof coating of bridge decks, and more particularly, to repair waterproofing of bridge decks, cracks, etc., or to repair waterproofing of bridge decks for priming and chaebol for newly constructed bridge decks.

In general, in order to maintain the leaked part or cracked part of the bridge, it is usually packaged on bridge deck with various repair work or newly constructed bridge deck (hereinafter referred to as bridge). As the pavement is paved with asphalt emulsion (adhesive liquid asphalt), the waterproofing is not perfect, and when water reaches into the cement concrete layer that forms the bridge, it is easily cracked, crushed and broken. As a result, there was a defect that weakens the bridge in a short time.

The present invention improves the weakness of the repair and the waterproofing agent for the maintenance of the conventional bridge as described above to provide a waterproof waterproof coating that can be completely repaired on the top plate, whether repaired bridge or newly constructed bridge. If it is described in detail by taking an example as a decrease as follows.

50 to 60 wt% of high boiling aromatic solvent, 40 to 50 wt% of N, N, N, N-tetrakis (2-hydroxypropyl) ethylenediamine, mixed with an appropriate amount of conventional curing accelerators and pigments, are mainly used. The mixture of 50 to 70 wt% of methane 4,4 'diisocyanate (MDI), which is a curing agent commonly used in 30 to 50 wt% of the same high boiling point aromatic solvent, is prepared by mixing a 1: 1 mixture with the main material, Hardening accelerators and pigments commonly used in mixtures of ethylene oxide-containing polypropylene glycol 60 to 80 wt%, triisopropanolamine 5 to 15 wt%, 1.4-butyldiol 2 to 8 wt%, and aromatic oils (new oil) 12 to 20 wt% It is a conglomerate which mixes the hardener mixture which mixes the appropriate amount in the ratio of 1: 1 with the said main body and 30-50 wt% of the same aromatic oils and MDI40-80 wt% which is the same hardening | curing agent as used for the above first painting. It is painted.

In the above, the high boiling point aromatic solvent is any one selected from toluene, ethylbenzene, xylene or a mixture thereof, ethylene glycol, perchloroethylene having a boiling point of 110 to 220 ℃, evaporation rate of 0.06 to 1.8, specific gravity of 0.85 to 0.90 One.

In the above description, the aromatic oil (extension oil) has a specific gravity of 0.98 to 1.02 at 15.6 ° C, an average molecular weight of 230 to 350, and a viscosity of 5 to 36 at 100 ° C.

The cross-coating waterproof coating of the present invention constituted as described above is primarily waterproofed by first painting the bridges that have been repaired or newly constructed, and the first coating is dried by coating the chaebol coating by the spray method and then dried again. When spraying the chaebol coating repeatedly spray coating the silica sand to form a three-layer coating layer as a perfect waterproof, the specific method of using the primary coating and chaebol painting is described in detail in the cross-section waterproofing method filed with the present invention.

The use of a high boiling point solvent in the primary coating of the cross-coating waterproofing coating of the present invention is for the solvent and viscosity control of N, N, N, N-tetrakiss (2-hydroxypropyl) ethylenediamine used herein, and strong penetration in cement. In order to achieve perfect waterproofing effect, the primary coating penetrates deeply into the cement bridge, and the use of N, N, N, N-tetrakiss (2-hydroxypropyl) ethylenediamine is used for cement bridges. To achieve a strong waterproof effect by the strong adhesion and penetration of the, the curing accelerator is to promote the curing of the primary coating by the curing agent MDI. In the above, the mixing ratio of the solvent and the adhesive or curing agent, such as viscosity control and adhesion and penetration. As for improving, the said compounding range is the most preferable.

The use of ethylene oxide-containing polypropylene glycol in chaebol lacquer in the bridge top coating of the present invention is a tree which is a coating agent having a strong and adhesive force for the purpose of keeping the waterproof membrane strong without being cracked due to the soft, elastic and tough waterproof layer. Isopropanolamine waterproofing layer makes the film tough and easy to harden to form waterproofing layer in a short time, 1.4-butyldiol is to make the waterproofing layer more solid, and aromatic oil is asphalt and silica sand And to improve the adhesion to the waterproof coating layer, the compounding ratio of each of the materials forming the chaebol is formulated in the most desirable ratio in consideration of the viscosity and adhesion for the spray coating of the chaebol.

Claims (5)

(delete) In the waterproofing coating of bridge decks with leaks or cracks on existing bridges, and bridge coatings and re-coatings for newly constructed bridge decks, the primary coating is 50 to 60wt% of N, N, N, N-tetra in a high boiling point aromatic solvent. Methane, which is a curing agent commonly used in the above-mentioned high boiling point aromatic solvent 30-50 wt%, mainly containing a mixture of kiss (2-hydroxy propyl) ethylenediamine 40-50 wt% and a suitable curing accelerator and a suitable amount of pigment. 50. 70 wt% of 4,4 'diisocyanate (MDI) is a waterproof coating for the bridge top plate, characterized in that consisting of a mixture of the primary and the curing agent mixture in a ratio of 1: 1. The toluene, ethylbenzene, xylene or a mixture thereof, ethylene glycol, perchloro ethylene according to claim 2, wherein the high boiling aromatic solvent has a boiling point of 110 to 220 ° C, an evaporation rate of 0.06 to 1.8, and a specific gravity of 0.85 to 0.90. Bridge deck waterproofing paint, characterized in that any one selected. In the waterproofing coating of bridge tops with leaks or cracks on existing bridges and the first and the second tops for bridge decks, the chaebol is 60-80 wt% of ethylene oxide-containing polypropylene glycol, triisopropanolamine Mainly a mixture of 5 wt% to 15 wt%, 1.4-butyl diol 2 wt% to 8 wt%, and a curing accelerator and a pigment suitable to a mixture of 12 to 20 wt% of aromatic oils, and 30 to 50 wt% of the same aromatic oil as above. A coating for waterproofing a bridge deck, comprising a mixture of a hardener mixture of 40 to 80 wt% of methane 4,4 'isocyanate (MDI) commonly used in a ratio of 1: 1 with the main material. The method of claim 4, wherein the aromatic oil has a specific gravity of 0.98 ~ 1.02 at 15.6 ℃, the average molecular weight is 230 ~ 350, the viscosity of the bridge top plate, characterized in that 5 to 36 at 100 ℃.