Patent ID: 12247143

Reference signs:1. Steel bridge deck,2. Anti-corrosion layer,3. Waterproof bonding layer,4. Protective layer,5. Bonding layer,6. Wear layer.

DESCRIPTION OF THE EMBODIMENTS

The technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art of the present invention. The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term “and/or” as used herein includes any and all combinations of one or more of the related listed items.

FIG.1is a schematic diagram of a conventional steel bridge deck pavement structure. The upper surface of steel bridge deck1is provided with an anti-corrosion layer2, a waterproof bonding layer3, a protective layer4, a bonding layer5and a wear layer6from bottom to top.

Example 1

1 part (molar mass) of hexamethylenediamine was added into the reactor and the temperature was raised to 80° C.; 2 parts (molar mass) of butyl glycidyl ether was slowly added into the reactor dropwise for 2 h, with a material temperature of 80° C. and a stirring rate of 60 r/min, whereby a linear bifunctional secondary amine curing agent was obtained; 1 part (molar mass) of hydrazine hydrate was added into the reactor and the temperature was raised to 70° C.; 1 part of 50% concentration isopropanol solution of dimethyl malonate was slowly added into the reactor dropwise for 2 h, followed by reaction for 5 h, with a material temperature of 70° C. and a stirring rate of 60 r/min, then an appropriate amount of xylene was added into the reactor and the azeotrope of xylene, water, hydrazine hydrate and alcohol was distilled under vacuum conditions, whereby an organic acid hydrazide, namely, a high-melting-point latent curing agent was obtained.

80 parts of linear phenolic polyglycidyl ether, 10 parts of benzyl glycidyl ether and 1 part of SCA-E87M were stirred at 60° C. for 60 minutes to obtain a main agent A; 70 parts of the bifunctional secondary amine curing agent, 10 parts of the high-melting-point latent curing agent and 1 part of fumed silica R974 anti-settling agent were stirred at 50° C. for 60 minutes to obtain a curing agent B, and then the main agent A and the curing agent B were mixed to obtain a two-stage epoxy bonding oil.

The construction was carried out by the steps of sand blasting and shot blasting on the substrate, spraying of silane interface agent, coating of two-stage epoxy bonding oil (to form the waterproof bonding layer3), first-stage curing, construction with hot mixture, and second-stage curing.

Example 2

1 part (molar mass) of hexamethylenediamine was added into the reactor and the temperature was raised to 80° C.; 2 parts (molar mass) of butyl glycidyl ether was slowly added into the reactor dropwise for 2 h, with a material temperature of 80° C. and a stirring rate of 60 r/min, whereby a linear bifunctional secondary amine curing agent was obtained; 1 part (molar mass) of hydrazine hydrate was added into the reactor and the temperature was raised to 70° C.; 1 part of 50% concentration isopropanol solution of dimethyl malonate was slowly added into the reactor dropwise for 2 h, followed by reaction for 5 h, with a material temperature of 70° C. and a stirring rate of 60 r/min, then an appropriate amount of xylene was added into the reactor and the azeotrope of xylene, water, hydrazine hydrate and alcohol was distilled under vacuum conditions, whereby an organic acid hydrazide, namely, a high-melting-point latent curing agent was obtained;

90 parts of linear phenolic polyglycidyl ether, 20 parts of benzyl glycidyl ether and 3 parts of SCA-E87M were stirred at 60° C. for 60 minutes to obtain a main agent A; 90 parts of the bifunctional secondary amine curing agent, 30 parts of the high-melting-point latent curing agent and 5 parts of fumed silica R974 anti-settling agent were stirred at 50° C. for 60 minutes to obtain a curing agent B, and then the main agent A and the curing agent B were mixed to obtain a two-stage epoxy bonding oil.

The construction was carried out by the steps of sand blasting and shot blasting on the substrate, spraying of silane interface agent, coating of two-stage epoxy bonding oil, first-stage curing, construction with hot mixture, and second-stage curing.

Example 3

1 part (molar mass) of decanediamine was added into the reactor and the temperature was raised to 80° C.; 2 parts (molar mass) of octyl glycidyl ether was slowly added into the reactor dropwise for 2 h, with a material temperature of 80° C. and a stirring rate of 60 r/min, whereby a linear bifunctional secondary amine curing agent was obtained; 1 part (molar mass) of hydrazine hydrate was added into the reactor and the temperature was raised to 70° C.; 1 part of 50% concentration isopropanol solution of diethyl succinate was slowly added into the reactor dropwise for 2 h, followed by reaction for 5 h, with a material temperature of 70° C. and a stirring rate of 60 r/min, then an appropriate amount of xylene was added into the reactor and the azeotrope of xylene, water, hydrazine hydrate and alcohol was distilled under vacuum conditions, whereby an organic acid hydrazide, namely, a high-melting-point latent curing agent was obtained.

80 parts of linear phenolic polyglycidyl ether, 20 parts of benzyl glycidyl ether and 1 part of SCA-E87E were stirred at 60° C. for 60 minutes to obtain a main agent A; 80 parts of the bifunctional secondary amine curing agent, 20 parts of the high-melting-point latent curing agent and 2 parts of fumed silica R974 anti-settling agent were stirred at 50° C. for 60 minutes to obtain a curing agent B, and then the main agent A and the curing agent B were mixed to obtain a two-stage epoxy bonding oil.

The construction was carried out by the steps of sand blasting and shot blasting on the substrate, spraying of silane interface agent, coating of two-stage epoxy bonding oil, first-stage curing, construction with hot mixture, and second-stage curing.

Example 4

1 part (molar mass) of amino-terminated polyether was added into the reactor and the temperature was raised to 80° C.; 2 parts (molar mass) of C8-C10 alkyl glycidyl ether was slowly added into the reactor dropwise for 2 h, with a material temperature of 80° C. and a stirring rate of 60 r/min, whereby a linear bifunctional secondary amine curing agent was obtained; 1 part (molar mass) of hydrazine hydrate was added into the reactor and the temperature was raised to 70° C.; 1 part of 50% concentration of isopropanol solution of ethyl benzoate was slowly added into the reactor dropwise for 2 h, followed by reaction for 5 h, with a material temperature of 70° C. and a stirring rate of 60 r/min, then an appropriate amount of xylene was added into the reactor and the azeotrope of xylene, water, hydrazine hydrate and alcohol was distilled under vacuum conditions, whereby an organic acid hydrazide, namely, a high-melting-point latent curing agent was obtained.

85 parts of linear phenolic polyglycidyl ether, 15 parts of benzyl glycidyl ether and 2 parts of SCA-E87F were stirred at 60° C. for 60 minutes to obtain a main agent A; 90 parts of the bifunctional secondary amine curing agent, 10 parts of the high-melting-point latent curing agent and 2 parts of fumed silica R974 anti-settling agent were stirred at 50° C. for 60 minutes to obtain a curing agent B, and then the main agent A and the curing agent B were mixed to obtain a two-stage epoxy bonding oil.

The construction was carried out by the steps of sand blasting and shot blasting on the substrate, spraying of silane interface agent, coating of two-stage epoxy bonding oil, first-stage curing, construction with hot mixture, and second-stage curing.

Example 5

1 part (molar mass) of amino-terminated polyether was added into the reactor and the temperature was raised to 80° C.; 2 parts (molar mass) of phenyl glycidyl ether was slowly added into the reactor dropwise for 2 h, with a material temperature of 80° C. and a stirring rate of 60 r/min, whereby a linear bifunctional secondary amine curing agent was obtained; 1 part (molar mass) of hydrazine hydrate was added into the reactor and the temperature was raised to 70° C.; 1 part of 50% concentration isopropanol solution of methyl salicylate was slowly added into the reactor dropwise for 2 h, followed by reaction for 5 h, with a material temperature of 70° C. and a stirring rate of 60 r/min, then an appropriate amount of xylene was added into the reactor and the azeotrope of xylene, water, hydrazine hydrate and alcohol was distilled under vacuum conditions, whereby an organic acid hydrazide, namely, a high-melting-point latent curing agent was obtained.

90 parts of linear phenolic polyglycidyl ether, 10 parts of benzyl glycidyl ether and 3 parts of SCA-E86M were stirred at 60° C. for 60 minutes to obtain a main agent A; 85 parts of the bifunctional secondary amine curing agent, 15 parts of the high-melting-point latent curing agent and 3 parts of modified bentonite anti-settling agent were stirred at 50° C. for 60 minutes to obtain a curing agent B, and then the main agent A and the curing agent B were mixed to obtain a two-stage epoxy bonding oil.

The construction was carried out by the steps of sand blasting and shot blasting on the substrate, spraying of silane interface agent, coating of two-stage epoxy bonding oil, first-stage curing, construction with hot mixture, and second-stage curing.

Comparative Example 1

1 part (molar mass) of hexamethylenediamine was added into the reactor and raising the temperature to 80° C.; 2 parts (molar mass) of butyl glycidyl ether was slowly added into the reactor dropwise for 2 h, with a material temperature of 80° C. and a stirring rate of 60 r/min, whereby a linear bifunctional secondary amine curing agent is obtained.

80 parts of linear phenolic polyglycidyl ether, 10 parts of benzyl glycidyl ether and 1 part of SCA-E87M were stirred at 60° C. for 60 minutes to obtain a main agent A; 80 parts of the bifunctional secondary amine curing agent and 1 part of fumed silica R974 anti-settling agent were stirred at 50° C. for 60 minutes to obtain a curing agent B, and then the main agent A and the curing agent B were mixed to obtain a two-stage epoxy bonding oil.

The construction was carried out by the steps of sand blasting and shot blasting on the substrate, spraying of silane interface agent, coating of two-stage epoxy bonding oil, first-stage curing, construction with hot mixture, and second-stage curing.

Comparative Example 2

1 part (molar mass) of hydrazine hydrate was added into the reactor and the temperature was raised to 70° C.; 1 part of 50% concentration isopropanol solution of dimethyl malonate was slowly added into the reactor dropwise for 2 h, followed by reaction for 5 h, with a material temperature of 70° C. and a stirring rate of 60 r/min, then adding an appropriate amount of xylene into the reactor and distilling the azeotrope of xylene, water, hydrazine hydrate and alcohol under vacuum conditions, whereby an organic acid hydrazide, namely, a high-melting-point latent curing agent is obtained.

80 parts of linear phenolic polyglycidyl ether, 10 parts of benzyl glycidyl ether and 1 part of SCA-E87M were stirred at 60° C. for 60 minutes to obtain a main agent A; 30 parts of the high-melting-point latent curing agent and 1 part of fumed silica R974 anti-settling agent were stirred at 50° C. for 60 minutes to obtain a curing agent B, and then the main agent A and the curing agent B were mixed to obtain a two-stage epoxy bonding oil.

The construction was carried out by the steps of sand blasting and shot blasting on the substrate, spraying of silane interface agent, coating of two-stage epoxy bonding oil, first-stage curing, construction with hot mixture, and second-stage curing.

Comparative Example 3

80 parts of linear phenolic polyglycidyl ether, 10 parts of benzyl glycidyl ether and 1 part of SCA-E87M were stirred at 60° C. for 60 minutes to obtain a main agent A; 40 parts of curing agent (651) and 1 part of fumed silica R974 anti-settling agent were stirred at 50° C. for 60 minutes to obtain a curing agent B, and then the main agent A and the curing agent B were mixed to obtain a two-stage epoxy bonding oil.

The construction was carried out by the steps of sand blasting and shot blasting on the substrate, spraying of silane interface agent, coating of two-stage epoxy bonding oil, first-stage curing, construction with hot mixture, and second-stage curing.

The performance test results of the two-stage epoxy bonding oil in Examples 1-5 and Comparative Examples 1-3 are shown in the table below.

TABLE 1Performance test results of the two-stage epoxy bonding oilTestComparativeComparativeComparativeTest ItemMethodExample 1Example 2Example 3Example 4Example 5Example 1Example 2Example 3Melting point of high-—153163114151148—140—melting-point latentcuring agent/° C.23° C.TensileGB/T4.26.85.64.55.21.40.96.5Tensilestrength/16777propertiesMPaElongation51348749852343569045227at break/%Water impermeabilityImpermeableImpermeableImpermeableImpermeableImpermeableImpermeableImpermeableImpermeable(0.3 MPa, 24 h)Water absorptionGB/T0.20.10.20.10.22.82.31.1at 25° C./%1034Melting Behavior—MeltMeltMeltMeltMeltMeltMeltDoes(150° C., 30 min)not meltBondingWithoutGB/T6.89.48.97.88.22.11.812strengththermal5210to steelshockplate atWith6.59.68.28.47.32.21.73.325° C./thermalMPashockBondingEpoxyJTG/T>2 MPa, and all epoxy asphalt0.4 MPa0.3 MPa0.5 MPastrengthasphalt3364-02mixture cohesive failureto mixturemixtureatModified>1 MPa, and all modified asphalt0.3 MPa0.3 MPa0.4 MPa25° C./asphaltmixture cohesive failureMPamixture

Through the verification of the above experimental results, aiming at the contradiction between sticking wheels and bonding performance of the (waterproof) bonding layer in the field of the road and bridge pavement such as steel bridge deck pavement, concrete bridge deck pavement and tunnel pavement, the present invention achieves the preparation of epoxy bonding oil with two-stage curing characteristics by compounding bifunctional secondary amine curing agent and high-melting-point latent curing agent. With the first-stage curing at room temperature, the cured product is not sticky to wheels; with the second-stage curing at 100° C. to 180° C., the cured product is in thermosetting state to ensure the bonding effect between the substrate and the upper pavement, effectively resolving the above contradiction and achieving a good bonding effect without sticking the wheels.

Those skilled in the industry should understand that the present invention is not limited by the foregoing embodiments. The foregoing embodiments and descriptions only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, which fall within the scope of the claimed invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.