KR20140118090A - Asphalt road reparing composition containing rubber modified moisture-curable polyurethan resin and mixing device thereof for site construction of it - Google Patents

Abstract

The present invention relates to an asphalt road repairing composition containing a hydraulic-setting rubber modified polyurethane resin and, more specifically, to an emergency road repairing material made of asphalt, as a main material, capable of urgently repairing a damaged part of a road, a bridge joint part, a dented part around a manhole, and the like in simple construction.

Description

[0001] The present invention relates to an asphalt road repair material composition containing a moisture-curing rubber-modified polyurethane resin and a mixing device for on-

The present invention relates to an asphalt road repair material composition comprising a moisture-setting rubber-modified polyurethane resin mixed with a moisture-curing rubber-modified polyurethane resin, and more particularly to a polyurethane resin composition which is capable of repairing a damaged portion of a road, a bridge joint, The present invention relates to an emergency road repair material composition comprising resin and asphalt as main materials.

Asphalt paved roads are gradually damaged due to ongoing vehicle traffic after construction, aging of asphalt over time, and increased precipitation due to climate and environmental changes. Recently, the traffic of large and overloaded vehicles has been increased due to reconstruction in urban areas, and the damaged area has been generated many times. Therefore, there is a need for repairing the damaged parts of the road in a short time. In addition, repair damaged areas immediately in case of rain or cold. Otherwise, the damaged area gradually enlarges, requiring large-scale repair in the future, resulting in a great economic loss.

In general, asphalt mixture repair materials are frequently used as emergency repair materials. The physical properties required for the repair material are convenient construction and fast strength development. Specifically, excellent physical properties should be provided in terms of fluidity, compaction property, cohesiveness between materials, reactivity, crosslinkability, storage stability, and the like. However, since these properties are closely related to each other, it is not so easy to improve all properties with only one prescription.

If the road surface during the summer rainy season is wet for a long time, the material is weakened and easily damaged. In order to prevent traffic accidents caused by road breakage in such a case, immediate repair is required. In this case, repair is usually done with emergency repair material of asphalt material. However, since the asphalt repair material is not generally hydrophilic, when it is wetted with water or mixed with water, the asphalt is hardly compaction and interfacial adhesion is not good. In such a case, there is a demand for a repair material which can work even if there is little water and is excellent in interfacial adhesion.

To solve this problem, a polyurethane resin mixed type asphalt repairing material is a repair material which is mixed with an asphalt repairing material and a polyurethane resin. When the polyurethane resin is mixed, the polyurethane resin contains an isocyanate group (-N = C = O) having a good polarity, so that it forms an urea bond with water. There are two types of products of this type. One is to mix the polyurethane resin beforehand with asphalt, and the other is to use the polyurethane resin separately packed and mixed with the asphalt material in the field (Korean Patent No. 10-206-0105060, Korean Patent No. 10-0719853) . However, the polyurethane mixed type asphalt repairing material, which is mixed and supplied in advance, has a problem in that an isocyanate group (-N = C = O) having a sensitive reactivity can react with various functional groups contained in asphalt and aggregate, (Korean Patent No. 10-0719853).

Another problem is that when cold roads are cooled in winter, they become brittle gradually. At this time, when a vehicle with a heavy load such as a heavy vehicle or an overload vehicle passes, the road easily receives cracking due to compressive force and tensile force. In order to prevent road cracking due to excessive load during cold cooling, rubber is usually mixed directly with the asphalt mixture. However, when the rubber is directly mixed with the asphalt, phase separation occurs between the materials due to poor compatibility, so that the rubber is not reinforced so as to have uniform physical properties, and the storage stability is deteriorated. Therefore, such a method is not a good solution.

Accordingly, the present invention solves the above two problems and provides a road repair material that is well reacted in water, can work even in rainy weather, has excellent interfacial adhesion, and is well absorbed even in winter so that cracks are hardly generated .

In order to achieve the above object, the present inventors have focused on a method of using a rubber-modified polyurethane resin prepared by reacting rubber directly with a polyurethane resin as a road repair material composition by mixing it with asphalt.

2 is a reaction formula for producing a rubber-modified polyurethane resin by reacting isocyanate and glycol with a liquid rubber. The rubber-modified polyurethane resin, which is a product of the reaction formula of FIG. 2, is obtained by reacting a liquid rubber having a hydroxyl group (-OH) at the molecular end with a glycol, which is a polyfunctional polyol, and 4,4-diphenyl diisocyanate (MDI) or tolylene diisocyanate TDI). ≪ / RTI > In the synthesis of the rubber-modified polyurethane resin, unreacted isocyanate groups (-NCO), which are reactive at the ends of the molecule, remain because the isocyanate component is used in excess of the equivalence ratio of the hydroxyl component. These react with water during rainy weather to form urea bonds and cross-link between molecules.

Normally, this rubber modified polyurethane resin can be mixed at a ratio of 100: 1.0 to 100: 2.0 to the asphalt road repair mixture. The amount of rubber-modified polyurethane resin seems to be very small, but in fact it is not. This is because, in general, the amount of the binder in the asphalt road repairs composition is only 5 to 7% of the total components. When this rubber-modified polyurethane resin is mixed with asphalt, multifunctional isocyanate groups are crosslinked in many directions in three directions, so that the crosslinking density is increased and the strength is increased. In addition, the rubber reacted in the molecule spreads uniformly in the material to serve as a good stress absorber, thereby suppressing the growth of cracks generated.

Also, in case of mixed-on-the-spot type, mixing and installing on-site will take time for emergency repair due to non-uniformity of mixing and workability due to manpower construction and traffic control is involved. It is advantageous to use uniformly and shorten the working time. The on-board type mixer injects and mixes the rubber-modified polyurethane resin to the mixture of asphalt road repair materials using the asphalt road repair material mixture hopper, the reactant rubber-modified polyurethane resin injection hole and the mixing screw, It was constructed in the form of laying. As a result, it is possible to reduce the work time by precise construction and increase of work efficiency compared with manpower.

The present invention relates to an asphalt road maintenance material composition comprising 5 to 7% by weight of a binder and 93 to 95% by weight of an aggregate,

The binder is 20 to 35% by weight of a rubber-modified polyurethane resin obtained by reacting a liquid rubber having an active hydroxyl group at the molecular end with glycol and a polyfunctional isocyanate at 40 to 60% by weight of asphalt and 15 to 25% Modified asphalt road repair material composition comprising a moisture-curing rubber-modified polyurethane resin.

Further, the present invention is characterized in that the glycol is at least one selected from the group consisting of trimethylolpropane, ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol and polypropylene glycol.

The present invention also relates to a process for producing a polyfunctional isocyanate, wherein the polyfunctional isocyanate is 4,4'-diphenyl diisocyanate, 2,4- or 2,6-tolylene diisocyanate, 3,3'-dimethyl- 3,3'-dimethoxy-4,4'-diphenyl diisocyanate, 1,5-dipthalendiisocyanate and xylene diisocyanate.

In addition, the present invention is characterized in that at least one catalyst selected from dibutyltin dilaurate, octacantin, cobalt naphthenate, triethyleneamine and trinormal butyltin acetate is added during the synthesis of the rubber-modified polyurethane resin.

Further, the present invention is characterized in that the rubber-modified polyurethane resin has an NCO% of 4-20 and a viscosity of 5-10 poise. Within this range, the crosslinking reaction is most likely to occur and the physical properties as a repair material are excellent.

The present invention is further characterized in that the rubber-modified polyurethane resin is prepared by adding 30 to 65% by weight of a polyfunctional isocyanate, 5 to 15% by weight of a trifunctional glycol, and 30 to 60% by weight of a liquid polybutadiene rubber.

Further, the present invention is characterized in that the liquid rubber having an active hydroxyl group at the molecular end is a liquid polybutadiene rubber.

Further, the present invention is characterized in that the liquid polybutadiene rubber is a trans-1,4-type, a cis-1,4-type or a vinyl-1,2-type double bond.

When the rubber-modified polyurethane resin of the present invention is mixed with the asphalt road repair material mixture, the rubber contained in the rubber-modified polyurethane resin absorbs the stress generated by the external force at the time of low temperature to suppress the occurrence of cracks, It is possible to prevent the growth of cracks by reducing the tip energy for the progress.

Since the isocyanate group attached to the terminal of the rubber-modified polyurethane resin of the present invention reacts sensitively with water, a repair work can be easily performed using an asphalt road repair material composition containing the rubber-modified polyurethane resin of the present invention in a rainy day .

Since the isocyanate group attached to the end of the rubber-modified polyurethane resin of the present invention has a multifunctional structure, the three-dimensional crosslinking is performed in various directions after application of the asphalt road repair material composition containing the rubber-modified polyurethane resin of the present invention, .

In addition to these advantages, the rubber-modified polyurethane resin of the present invention has a viscosity so that when mixed with an asphalt road repair material mixture, excellent compaction can be obtained at the beginning, and later resistance to breakage due to expansion and contraction.

In general, the present invention can reinforce physical properties in terms of cohesion among materials, collapsibility of aggregates, wet adhesion, stability, compressive strength, impact resistance, etc., by using rubber-modified polyurethane resin mixed with asphalt road repair material mixture.

In addition, the road repair material composition of the present invention can increase the precision of the urethane resin mixing by mechanized construction as compared with the gravity construction, and can increase the amount of construction by shortening the working time.

1 is an embodiment of a construction apparatus for constructing the asphalt road repair material composition of the present invention.
2 is a cross-

The composition of the asphalt road repair material used in the present invention is composed of 5 ~ 7% binder and 93 ~ 95% aggregate. Binders consist of 40 ~ 60% of asphalt, 20 ~ 35% of auxiliary binder and 15 ~ 25% of solvent.

As the asphalt, natural asphalt, straight asphalt, blown asphalt and the like can be used. The amount used is 40 to 60% of the total binder. The most preferred of these is straight asphalt. Straight asphalt is obtained by distillation of crude oil in an atmospheric distillation column, and finally distillation of the residual oil by vacuum distillation. It is excellent in oxidizing property, polymerizing property, adhesiveness, water resistance and is mainly used as an organic binder.

As the auxiliary binder in the present invention, a rubber-modified polyurethane resin obtained by reacting a liquid rubber in a molecule is used. Appropriate amount of auxiliary binder is 20 ~ 35%. The auxiliary binder of the present invention is obtained by reacting a polyfunctional glycol, a polyfunctional isocyanate, and a butadiene rubber having a terminal hydroxyl group at 40 to 80 ° C for 4 to 8 hours. Examples of the polyfunctional isocyanate include 4,4'-diphenyl diisocyanate, 2,4- or 2,6-tolylene diisocyanate, 3,3'-dimethyl-4,4'-diphenyl diisocyanate, Dimethoxy-4,4'-diphenyl diisocyanate, 1,5-dipthalenedisocyanate, and xylene diisocyanate. The amount of the isocyanate component in the total reaction mixture during the reaction is 20 to 83% by weight. In the reaction, the isocyanate (-NCO) group is introduced in an equivalent amount of 1-3 times as much as the hydroxyl group (-OH) group, so that an isocyanate group (-NCO) group is left at the end of the product molecule after the reaction.

As the polybutadiene rubber, those having a double bond at the position of trans-1,4 type or cis-1,4 type and vinyl-1,2 type can be used. Preferably, the content of the vinyl-1,2 bond is 35% or less in consideration of adhesive strength and flexibility at low temperatures. In addition, those having an active hydroxyl group at both terminals of the molecule and having a molecular weight in the range of 1000 to 4500 are suitable for use. Examples of such rubbers include R-45HT, R-45EPI, and PB G-1000 of NIPPON SODA CO., LTD. The appropriate amount of polybutadiene rubber to be used in the reaction is 20 to 70% by weight.

As the glycol, trimethylol propane (TMP), ethylene glycol (EG), diethylene glycol (DEG), triethylene glycol (TEG), polyethylene glycol (PEG), polypropylene glycol (PPG) and the like can be used. As the polyethylene glycol, PEG 200, PEG 400 and the like can be used. As the polypropylene glycol, PPG 200, PPG 400, PPG 3000 and the like can be used. The amount of the polyfunctional glycol component contained in the feedstock to be added during the reaction is preferably from 10 to 20% by weight.

As the catalyst, there can be used dibutyl tin dilaurate (DBTDL), oct-octoate, cobalt naphthenate, triethylene amine, trinormal butyl tin acetate and the like. An appropriate amount of the catalyst to be used in the feedstock fed in the reaction is 0.01 to 1.0% by weight.

Solvents may be used when the viscosity of the composition is high. (BA), methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), toluene, xylene, and the like can be used as the solvent in which the reaction product and the product are dissolved well. Can be used. An appropriate amount of the solvent to be used in the reaction is 10 to 50% by weight.

The rubber-modified polyurethane resin of the present invention is prepared by reacting a polyfunctional isocyanate, a polybutadiene rubber, a polyfunctional glycol, a solvent and a catalyst at 40 ° C for 1 hour and then heating to 60-80 ° C to conduct a constant temperature reaction. %, When the viscosity is 5-10 poise, it is cooled to below 30 ℃ and packaged. In the reaction, the molar ratio of NCO / OH is 1.2-3.0, and NCO is excessively reacted. The remaining NCO (wt%) after the reaction is adjusted to 4-20 wt% in consideration of the curing characteristics. If the unreacted NCO (% by weight) is too small, the water is less adaptive, and if it is too large, the strength of the cured product is lowered. The final viscosity of the product is 500 to 1000 centipoise, which increases workability and physical properties. If the viscosity is too low, the strength is lowered due to the insufficient molecular weight. If the viscosity is too high, the mixing with the asphalt is not smooth.

The reaction of the reaction scheme of FIG. 2 takes place with urethane bonds, buret bonds, allophanate bonds and the like depending on temperature and catalyst, and any reaction does not pose a problem in achieving the object of the present invention.

It is appropriate that the rubber-modified polyurethane resin is mixed with an asphalt road repair material mixture of asphalt, solvent, aggregate and other additives at a ratio of 100: 1.0 to 100: 2.0. If the mixing amount is too small, the addition effect is small due to the presence of a large amount of thermoplastic components, and if it is too much, the amount of thermosetting components is decreased and the elongation is decreased. The "asphalt road repair material mixture" refers to a mixture of asphalt, a solvent, an aggregate, and other additives in a state in which only the rubber-modified polyurethane resin as an auxiliary binder in the final asphalt road repair material composition is not mixed.

Gasoline, kerosene, light oil, heavy oil, etc. may be used as the solvent (solvent) in the above asphalt road repair material mixture. As the aromatic solvent, benzene, toluene, xylene and the like can be used. Examples of the ketone-based solvent include acetone, methyl ethyl ketone, and methyl isobutyl ketone. If you use a lot of solvents, fluidity improves, but initial stability deteriorates. The solvent lowers the viscosity of the asphalt, which is the main material of the binder, and functions to smooth the operation at room temperature. If the amount of the solvent used is less than 15 wt%, the mixture will not flow smoothly at room temperature due to the use of too small amount. If the amount is more than 25 wt%, the curing time will be delayed due to the residual volatile components. Therefore, an appropriate amount of the solvent is 15 to 25% by weight of the total binder.

Other additives that can be added to the binder include flow improvers, thickeners, adhesion promoters, plasticizers and the like, and the additives may be added in the range of 5 wt% or less of the total binder. As the fluidity improving agent, wax, process oil, or the like can be used. As the wax, paraffin wax, carnauba wax, polyethylene wax, polyamide wax and the like can be used. Wax improves the coating thickness of aggregate when manufacturing mixture and improves workability in construction by helping lubrication of aggregate and binder. Specific examples of the process oil include, but are not limited to, Pro-300 of SK, AC-12 of Hoechung Heung San Co., Ltd. and Lequios 150 of Il Dong Alliance Co., And will be apparent to those of ordinary skill in the art. An appropriate amount of the flow improver is 0.5 to 1 wt% of the total binder component. When mixing more than 1% by weight, the strength of the asphalt is lowered by weakening the binding force of the asphalt. As the thickening agent, fine silica or bentonite can be used. An appropriate amount is 0.5 to 1% by weight of the total binder component. A plasticizer can be used to impart flexibility and tackiness to the material. As the plasticizer, dibutyl phthalate (DBP), dioctyl phthalate (DOP), dicresyl phthalate (DCP) and the like can be used. However, care must be taken when using too much, as it will cause a drop in strength. An appropriate amount is 0.5 to 1% by weight of the total binder component.

Granite, gneiss, sand and recycled aggregate can be used as the aggregate. The aggregate serves as an additive to the strength of the asphalt pavement. The aggregate is loaded so as to occupy 93 to 95% by weight of the total asphalt road repair material composition. The size of coarse aggregate can be used in the range of 5 ~ 13mm. The particle size distribution of the aggregate affects fluidity and strength. In order to improve the compaction, coarse aggregate is small and can be mixed with fine aggregate. The fine aggregate used may be of the order of 0.5-1 mm. When a coarse aggregate and a fine aggregate are mixed, it is preferable to mix the coarse aggregate and the fine aggregate at a ratio of 5: 5 to 9: 1. In order to improve the fluidity, the aggregate may be used in the form of a spherical shape. The aggregate used is to comply with the coarse aggregate quality standard for KS F 2357 bituminous mixture and the fine aggregate quality standard for KS F 2358 bituminous mixture.

In addition, the composition for asphalt road repair of the present invention is prepared by mixing rubber-modified polyurethane resin in the field. The present inventors have also invented a composition mixing device for asphalt road repair. Specifically, the mixing apparatus includes a hopper for containing a mixture of asphalt road repair materials mixed with asphalt, a solvent and an aggregate, a resin storage member for containing a rubber-modified polyurethane resin, a rubber-modified polyurethane resin of the storage member asphalt road repair material A urethane sprayer for spraying the mixture, a mixing screw connected to the urethane sprayer and mixing the contents of the hopper and a rubber-modified polyurethane resin as a content of the resin storage member to prepare an asphalt road repair composition, and the asphalt road repair composition And an emergency repair material port for discharging the fuel to a road requiring maintenance. Fig. 1 shows a real photograph.

The raw materials specified above were blended as shown in the table below to make a direct asphalt road repair material composition.

Examples 1 to 3 and Comparative Examples 1 to 3 were tested.

[Example 1]

82.50 g of polypropylene glycol (PPG) -1000, 745 g of polybutadiene rubber (R-45HT) and 0.08 g of dibutyl tin dilaurate (DBTDL) were placed in a reactor, and the temperature was raised to 40 캜 217 g of toluene diisocyanate (TDI) was added dropwise at this temperature uniformly for 1 hour. When the temperature was raised to 60 ° C and the reaction was allowed to proceed at a constant temperature, the unreacted NCO content (% by weight) was measured every hour. As shown in the table below, 985 g of asphalt road repair material mixture was mixed with 15 g of Compound I and the physical properties were measured.

[Example 2]

52 g of trimethylol propane (TMP), 33 g of polypropylene glycol (PPG) -400, 75 g of polybutadiene rubber (R-45 EPI) and 0.04 g of dibutyl tin dilaurate (DBTDL) Then, at this temperature, 209 g of toluene diisocyanate (TDI) was uniformly added dropwise over 1 hour. When the temperature was raised to 70 ° C., the NCO content (% by weight) was measured at an hourly temperature while being reacted at this temperature. If the NCO content was 10 or less, the reaction product was cooled to 30 ° C. or lower to obtain Compound II. As shown in the table below, 985 g of asphalt road repair material mixture was mixed with 15 g of Compound II and the physical properties were measured.

[Example 3]

52.5 g of trimethylol propane (TMP), 100 g of triethylene glycol (TEG), 300 g of polybutadiene rubber (PB G-1000) and 0.09 g of dibutyl tin dilaurate (DBTDL) were placed and heated to 40 캜 with stirring At this temperature, 500 g of diphenylmethane-4,4'-diisocyanate was uniformly added dropwise for 1 hour. When the temperature was raised to 60 ° C., the NCO content (wt%) was measured every hour while being subjected to a constant temperature reaction at this temperature. When the NCO content was 5 or less, the product was cooled to 30 ° C. or lower to obtain Compound III. As shown in the table below, 985 g of asphalt road repair material mixture was mixed with 15 g of Compound III, and physical properties were measured.

[Comparative Example 1]

190 g of polypropylene glycol (PPG-400), 440 g of polypropylene glycol (PPG-3000) and 0.1 g of dibutyl tin dilaurate (DBTDL) were added to the reactor and the temperature was raised to 40 캜 with stirring. Then, toluene diisocyanate ) Was uniformly added dropwise over 1 hour. When the temperature was raised to 60 ° C and the reaction was allowed to proceed at a constant temperature, the unreacted NCO content (% by weight) was measured every hour. As shown in the table below, 985 g of the asphalt road repair material mixture was mixed with 15 g of the composite Ⅳ and the physical properties were measured.

[Comparative Example 2]

26.8 g of trimethylolpropane (TMP), 100 g of polypropylene glycol (PPG-400) and 0.04 g of dibutyltin dilaurate (DBTDL) were added and the temperature was raised to 40 캜 with stirring. 261 g of toluene diisocyanate Lt; / RTI > When the temperature was raised to 60 ° C., the NCO content (% by weight) unreacted hourly was measured at this temperature while being subjected to a constant temperature reaction at this temperature. As shown in the table below, 985 g of the asphalt road repair material mixture was mixed with 15 g of the compound V and the physical properties thereof were measured.

[Comparative Example 3]

17.88 g of trimethylolpropane (TMP), 34.1 g of ethylene glycol, and 0.03 g of dibutyltin dilaurate (DBTDL) were added and the temperature was raised to 40 캜 with stirring. Then, diphenylmethane-4,4'-diisocyanate Was uniformly added dropwise over 1 hour. When the temperature was raised to 70 ° C., the NCO content (wt%) was measured at an hourly temperature while being reacted at this temperature. When the NCO content was 5 or less, the product was cooled to 30 ° C. or lower to obtain Compound VI. As shown in the table below, 985 g of the asphalt road repair material mixture was mixed with 15 g of the composite Ⅵ and the physical properties were measured.

Raw material classification Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 asphalt
Road repair material
mixture asphalt 25 25 25 25 25 25 Solvent (solvent) 10 10 10 10 10 10 6mm aggregate 764 764 764 764 764 764 Less than 1mm 186 186 186 186 186 186 Rubber degeneration
Polyurethane resin Compound I 15 Composite II 15 Compound III 15 Compound IV 15 Compound V 15 Compound VI 15 system 1000 1000 1000 1000 1000 1000

Item
Example 1
Example 2
Example 3
Comparative Example 1
Comparative Example 2
Comparative Example 3 After 24 hours of molding
Stability (25 ℃, N) 2640 2700 2790 2100 2310 2420 After 10 days of molding
Stability (25 ℃, N) 7720 7800 9210 3200 3500 3600 After 10 days of water absorption
Stability (25 ℃, N) 4030 4120 4233 1020 1100 1300 25 ℃ flexural strength
(kg / cm2) 150 200 240 50 70 90 -10 ℃ flexural strength
(kg / cm2) 230 380 540 100 150 180 25 ° C Compressive strength
(kg / cm2) 20 22 24 10 12 15 -10 ℃ compressive strength
(kg / cm2) 32 36 38 20 24 28

[Physical properties test method]

1) Stability after 24 hours of molding: The asphalt road repair material composition was molded according to KS F 2349, and the stability was measured after 24 hours.

2) Stability after 10 days of molding: The asphalt road repair material composition was molded according to KS F 2349, and the stability was measured after 10 days.

3) Stability after 10 days of water absorption: 1000 g of the asphalt road repair material composition was mixed with 50 g of water, molded according to KS F 2349, and then the stability was measured at room temperature for 10 days.

4) Flexural strength: The asphalt road repair material composition was molded according to KS F 2395, and after 10 days, the temperature of the test piece was adjusted to a predetermined temperature and the compressive strength was measured

5) Tensile strength: Ten days after molding the asphalt road repair material composition according to KS F 2351, the temperature of the test piece was adjusted to a predetermined temperature and the tensile strength was measured

As shown in the above table, the rubber-modified polyurethane resin exhibited remarkably excellent physical properties in terms of stability, bending strength and compressive strength as a whole.

[Construction method]

In order to construct the asphalt road repair material composition of the present invention, first, the spreader is mounted on a truck or the like. After putting the mixture of asphalt road repair material into the hopper, the hopper opening and closing device was opened and moved to the mixing screw, and the rubber modified polyurethane resin was sprayed through the urethane filling port while mixing with the mixing screw, The asphalt road repair material composition was sprayed on the road maintenance site, and the operator performed maintenance using a manpower or a compaction machine.

Claims (9)

5-7% by weight of a binder, and 93-95% by weight of an aggregate,
The binder is 20 to 35% by weight of a rubber-modified polyurethane resin obtained by reacting a liquid rubber having an active hydroxyl group at the molecular end with glycol and a polyfunctional isocyanate at 40 to 60% by weight of asphalt and 15 to 25% Modified asphalt road repair material composition comprising a moisture-curing rubber-modified polyurethane resin.
The method according to claim 1,
Wherein the glycol is at least one selected from the group consisting of trimethylol propane, ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol and polypropylene glycol.
The method according to claim 1,
The polyfunctional isocyanate may be at least one selected from the group consisting of 4,4'-diphenyl diisocyanate, 2,4- or 2,6-tolylene diisocyanate, 3,3'-dimethyl-4,4'-diphenyl diisocyanate, Wherein the composition is at least one selected from the group consisting of epoxy-4,4'-diphenyl diisocyanate, 1,5-dipthalenedisocyanate and xylylene diisocyanate.
The method according to claim 1,
Rubber-modified polyurethane resin A moisture-curing rubber-modified polyurethane resin characterized by adding at least one catalyst selected from dibutyl tin dilaurate, octacantin, cobalt naphthenate, triethylene amine and trinormal butyl tin acetate during the synthesis reaction Asphalt road repair material composition.
The method according to claim 1,
Wherein said rubber-modified polyurethane resin has an NCO of 4-20% by weight and a viscosity of 5-10 poise, wherein said rubber-modified polyurethane resin is a mixture of said rubber-modified polyurethane resin and said moisture-curing rubber-modified polyurethane resin.
The method according to claim 1,
The rubber-modified polyurethane resin is prepared by adding 30 to 65% by weight of a polyfunctional isocyanate, 5 to 15% by weight of a trifunctional glycol, and 30 to 60% by weight of a liquid polybutadiene rubber. Asphalt road repair material composition.
The method according to claim 1,
Wherein the liquid rubber having an active hydroxyl group at the molecular end is a liquid polybutadiene rubber, wherein the liquid rubber is a liquid polybutadiene rubber.
The method of claim 7,
Wherein the liquid polybutadiene rubber is a crosslinked asphalt road repair material composition obtained by mixing a moisture-curing rubber-modified polyurethane resin with a double bond of trans-1,4 type, cis-1,4 type or vinyl-1,2 type.
Asphalt mixed with asphalt, solvent and aggregate,
A resin storage member containing a rubber-modified polyurethane resin obtained by reacting a liquid rubber having an active hydroxyl group at a molecular end with a glycol and a polyfunctional isocyanate,
A urethane tank for spraying the rubber-modified polyurethane resin of the resin storage member onto an asphalt road maintenance mixture discharged from the hopper,
A mixing screw connected to the urethane sprayer and mixing the contents of the hopper and the rubber-modified polyurethane resin as the contents of the resin storage member to produce a composition for asphalt road repair;
And an emergency repair material pouring port for discharging the asphalt road repair composition to a road requiring repair.

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