KR101281622B1 - Warm-mix recycled asphalt additives comprising toluenediamie-based polyols and manufacturing method thereof - Google Patents

Abstract

Provided is a medium-temperature regenerated asphalt additive comprising a toluenediamine-based polyol and a method for producing the same. Middle-temperature reclaimed asphalt additive according to an embodiment of the present invention is toluene diamine ethoxylated polyols, toluene diamine propoxylated polyols and toluene diamine propoxylated / ethoxy At least one toluenediamine-based polyol selected from the group consisting of toluene diamine propoxylated / ethoxylated polyols. According to the present invention, even when used asphalt waste concrete and new asphalt concrete mixed to overcome the problems of brittleness and low temperature properties, while expressing the neutralization mixture packaging technology, minimizing the generation of harmful gases, waste asphalt concrete Efficient recycling can reduce the environmental burden.

Description

Medium-temperature reclaimed asphalt additive containing toluenediamine-based polyols and a method for producing the same {WARM-MIX RECYCLED ASPHALT ADDITIVES COMPRISING TOLUENEDIAMIE-BASED POLYOLS AND MANUFACTURING METHOD THEREOF}

The present invention relates to a medium-temperature regenerated asphalt additive including a toluenediamine-based polyol capable of expressing regenerated and neutralized pavement technology for waste asphalt concrete, and a method of manufacturing the same.

Asphalt Mixture is commonly called ascon, and after adding asphalt, aggregate, filler, etc. to the Asphalt Mixing Plant, these materials are put at 160-180 ° C. After being manufactured by heating to a high temperature, after laying and compaction on the road, the process is cooled to room temperature.

Therefore, not only a large amount of energy is required for high temperature heating, but there is a problem that emissions of harmful gases such as carbon dioxide, sulfur oxides, and nitrogen oxides are increased even during the manufacture and construction of the asphalt mixture. In addition, since the road paving takes a long time to cool the high temperature asphalt mixture to room temperature, there is a problem that the traffic opening time is delayed, and workers are exposed to the risk of safety accidents.

Recently, in order to solve such a problem, a warm temperature asphalt mixture (Warm-) which mixes and compacts the asphalt mixture at a temperature of 20-40 ° C. lower than that of a conventional heated asphalt mixture (HMA) without deteriorating the physical properties of the asphalt. Research on Mix Asphalt Mixture (WMA) has been actively conducted, and there is a need for development of a neutralizing additive for a medium-temperature asphalt mixture having more improved performance.

The core mechanism of this warm asphalt mixture (WMA) paving technology is to improve the fluidity of the asphalt. In other words, in the medium temperature paving technology, an additive or the like is added to an asphalt mixture so that the optimum viscosity of the asphalt, which is a binder of the aggregate, is expressed at a lower temperature than the heated asphalt mixture (HMA), and the optimum compaction rate is expressed at a lower temperature. It is a technique of lowering the viscosity.

On the other hand, when the asphalt pavement passes for a long time after pavement, cracks and deformations occur due to aging of the asphalt binder due to repeated vehicle traffic and surrounding environment. In the case of roads in which cracks and deformations occur due to long-term use and aging as described above, new asphalt concrete is installed after removing waste asphalt concrete. Waste asphalt concrete generated at this time is classified as industrial waste because it contaminates groundwater and rivers when disposed by landfill without special treatment. Therefore, research is being actively conducted to minimize the generation of waste asphalt concrete or to recycle it.

In general, waste asphalt concrete is recycled and used as recycled aggregates. The waste asphalt concrete is crushed to a predetermined size or less and mixed with new aggregate and new asphalt in an asphalt concrete plant, and is mainly used. At this time, since the viscosity of the aging asphalt contained in the waste asphalt concrete is high and the asphaltene content is increased due to the aging, the pavement is not well made at the time of pavement or the pavement is satisfactory at the initial pavement even if it is compacted, There is a problem of weakening and cracks and damage occurs.

In order to solve this problem, regeneration additives are generally used. Renewable additives are being developed to improve the composition of aged asphalt and convert it to components similar to new asphalt.

In other words, asphalt components are divided into asphaltenes, resins, oils, etc. The content of asphalt varies depending on asphalt, but the content ratio of asphalt with 100 penetration is approximately 13-29%, It consists of 2.3-4.5% resin, 44-58% oil. As the asphalt ages, the components of the asphalt, such as resin and oil, are changed to asphaltenes, thereby increasing the asphaltene content in the asphalt. Recycling additives are focused on making up for the lack of ingredients in asphalt so that aged asphalt has an asphaltene content similar to that of new asphalt.

However, these regeneration additives are merely for the purpose of improving the asphalt component, and are produced at a temperature similar to that of ordinary ascon or at a high temperature of 5 to 10 ° C. for sufficient mixing in the production of ascon. Therefore, when manufacturing the asphalt mixture, a lot of energy is required to heat the asphalt mixture to a high temperature, and even during construction of the asphalt mixture has a problem that the emissions of harmful gases such as carbon dioxide (CO ₂ ) increases. In addition, since the degree of aging of the waste asphalt concrete is different each time, there is a limit in recycling the asphalt of the various waste asphalt concrete with the same regeneration additive.

Asphaltene is a highly concentrated aromatic compound chemically having a polar functional group with many heteroatoms, and is expected to have a strongly bound form of polar molecules since it is a highly polar molecular mass in asphalt components. It is reported that the polarity of the asphaltene component is formed due to heteroatoms (S, N, O). As the asphaltene component increases due to the aging of asphalt, the brittleness and low-temperature physical properties of asphalt in the waste asphalt concrete are deteriorated by the asphaltene having no fluidity. Therefore, there is a need for development of regeneration additives that can improve the flexibility of asphaltenes more quickly than simply improve the components of aged asphalt.

As a result, it is necessary to develop an additive capable of expressing the medium-temperature mixture (WMA) packaging technology without mixing the waste asphalt concrete and new ascon when mixing asphalt concrete.

The problem to be solved by the present invention is to overcome the problem of brittleness and low temperature properties, even when used asphalt waste concrete mixed with new asphalt concrete during the production of asphalt concrete, by expressing the medium temperature mixture packaging technology, to minimize the generation of harmful gases, waste asphalt It is to provide a medium-temperature reclaimed asphalt additive comprising a toluenediamine-based polyol that can efficiently recycle the concrete to reduce the environmental burden, and a method for producing the same.

Medium-temperature reclaimed asphalt additive according to an embodiment of the present invention for solving the above problems is toluene diamine ethoxylated polyols, toluene diamine propoxylated polyols and toluene diamine prool At least one toluenediamine-based polyol selected from the group consisting of toluene diamine propoxylated / ethoxylated polyols.

In addition, the method for producing a mesophilic reclaimed asphalt additive according to another embodiment of the present invention for solving the above problems comprises the steps of melting toluenediamine; And reacting the molten toluenediamine with propylene oxide, ethylene oxide or a mixture thereof using KOH as a reaction catalyst, wherein the mesophilic reclaimed asphalt additive is toluene diamine ethoxylated polyols. At least one toluenediamine-based polyol selected from the group consisting of toluene diamine propoxylated polyols and toluene diamine propoxylated / ethoxylated polyols. do.

According to the present invention, by using toluenediamine-based polyols to improve the mixing properties with asphalt, it is possible to improve the low-temperature properties and flexibility of asphaltenes, it is possible to obtain a regeneration and neutralization effect on the waste asphalt concrete.

Therefore, by using the mid-temperature reclaimed asphalt additive containing toluenediamine-based polyol according to the present invention, even when used asphalt waste concrete and new ascon mixed with the asphalt can be overcome the problem of low brittleness or low temperature properties.

In addition, the production and compaction temperature of asphalt concrete can be effectively lowered without deteriorating physical properties, thereby minimizing the emission of harmful gases such as carbon dioxide, sulfur oxides, and nitrogen oxides, and efficiently recycling waste asphalt concrete, which is advantageous in terms of environment. The effect can be obtained.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Middle-temperature reclaimed asphalt additive according to an embodiment of the present invention is toluene diamine ethoxylated polyols, toluene diamine propoxylated polyols and toluene diamine propoxylated / ethoxy At least one toluenediamine-based polyol selected from the group consisting of toluene diamine propoxylated / ethoxylated polyols.

Toluenediamine-based polyols included in the medium-temperature reclaimed asphalt additive according to an embodiment of the present invention improves the mixing properties with asphalt, and the polar and flexible poly-oxide chain gives brittleness by giving flexibility to asphaltenes contained in waste asphalt concrete. To compensate for, and to improve the low temperature properties.

Toluenediamine-based polyol used in the above embodiment is represented by the following formula 1:

Formula 1:

[Formula 1]

[In the above formula,

R ₁ and R ₂ are each

Or

Any one of R ₁ and R ₂

, The other is H,

m and n are each an integer of 0 to 15, and 3 ≦ m + n ≦ 30.]

It is preferable that it is represented by.

In the above formula, m + n is preferably 3 or more and 30 or less, more preferably 5 or more and 20 or less. If m + n is less than 3, the short polyoxide chains are not sufficient to improve the low temperature properties of asphalt concrete and improve the flexibility of asphaltenes, and if m + n is above 30, the viscosity is too high to pump oil in asphalt concrete plants. Difficult to transport causes problems in use, adversely affecting the neutralization effect.

The moderate temperature reclaimed asphalt additive according to one embodiment of the present invention may further include at least one viscosity improving agent selected from the group consisting of polyethylene wax, vegetable wax, animal wax, surfactant, fatty acid and modified fatty acid.

Such a viscosity improving agent enhances the neutralization function of the additive, prevents the lowering of low temperature physical properties of the asphalt, and serves to increase the dispersion rate of the additive.

The viscosity improving agent is preferably included in the range of 10 to 60 parts by weight based on 100 parts by weight of the toluenediamine-based polyol. When the amount of the viscosity improving agent is less than 10 parts by weight based on 100 parts by weight of the toluenediamine-based polyol, the effect of improving the low temperature properties and viscosity of the asphalt is insignificant, and when it exceeds 60 parts by weight, the high temperature properties of the asphalt are lowered.

It is preferable that melting | fusing point is 120 degrees C or less, and melt viscosity in 140 degreeC is 200 cPs or less. If the melting point of the viscosity improving agent exceeds 120 ℃, it does not melt during the production of asphalt concrete, a problem arises that the viscosity of the additive in the manufacturing process rises. In addition, when the melt viscosity of the viscosity improver at 140 ° C exceeds 200 cPs, the viscosity is higher than that of asphalt, which affects the neutralizing effect.

In addition, the medium-temperature regenerated asphalt additive according to an embodiment of the present invention may further include one or more selected from the group consisting of antioxidants, heat stabilizers, antistatic agents and lubricants.

Method for producing a mesophilic reclaimed asphalt additive according to another embodiment of the present invention comprises the steps of melting toluenediamine; And reacting the molten toluenediamine with propylene oxide, ethylene oxide or mixtures thereof using KOH as the reaction catalyst.

Here, the medium temperature reclaimed asphalt additives are toluene diamine ethoxylated polyols, toluene diamine propoxylated polyols and toluenediamine propoxylated / ethoxylay as described above. At least one toluenediamine-based polyol selected from the group consisting of toluene diamine propoxylated / ethoxylated polyols. Details of the middle-temperature reclaimed asphalt additive are the same as the above-described embodiments, and thus detailed descriptions thereof will be omitted.

According to the method for producing a medium temperature reclaimed asphalt additive according to another embodiment of the present invention, first, toluenediamine is melted. This melting step can be made at a temperature of 110 ~ 160 ℃.

The molten toluenediamine is then reacted with propylene oxide, ethylene oxide or mixtures thereof using KOH as the reaction catalyst.

This reaction is shown in Scheme 1:

[Reaction Scheme 1]

Can be expressed as

Where

R ₁ and R ₂ are each

Or

Any one of R ₁ and R ₂

, The other is H,

m and n are integers of 0-15, respectively, and 3 ≦ m + n ≦ 30.

In one embodiment, after the reaction step, the method may further include adding and mixing one or more viscosity improving agents selected from the group consisting of polyethylene wax, vegetable wax, animal wax, surfactant, fatty acid and modified fatty acid.

Such a viscosity improving agent may be added in the range of 10 to 60 parts by weight based on 100 parts by weight of the toluenediamine-based polyol.

Since the detailed description of the viscosity improving agent is the same as in the above-described embodiment, the detailed description thereof is omitted here.

In addition, in one embodiment, after the reaction step, may further comprise the step of adding and mixing at least one selected from the group consisting of antioxidants, heat stabilizers, antistatic agents and lubricants.

In one embodiment, after the reaction step, it may further comprise the step of cooling to room temperature.

By using the medium-temperature reclaimed asphalt additive according to the embodiment of the present invention in the waste asphalt, it is possible to obtain the regeneration effect and the medium temperature effect of the waste asphalt concrete, and to obtain the reclaimed asphalt concrete having excellent low temperature properties.

The medium-temperature reclaimed asphalt additive according to one embodiment of the present invention may be added in an amount of 2 to 15% by weight based on the total amount of waste asphalt, depending on the aging degree of waste asphalt contained in the waste asphalt concrete. If the added amount of the medium-temperature regeneration additive is less than 2% by weight, the recovery effect of the waste asphalt is not large, and if it exceeds 15% by weight, the softening point is lowered during use, which causes problems in the use of asphalt. Is not large.

The middle-temperature regenerated asphalt mixture including the middle-temperature regenerated additive according to an embodiment of the present invention may further include a circulating aggregate made of waste asphalt concrete.

In one embodiment, based on the total weight of the recycled asphalt mixture, the recycled aggregate made of waste asphalt concrete may be included in the range of 15 to 100% by weight.

In addition, the medium-temperature reclaimed asphalt mixture including the medium-temperature regenerated additive according to an embodiment of the present invention may further include new aggregates, new asphalt, or mixtures thereof, in addition to circulating aggregates made of waste asphalt concrete.

In one embodiment, based on the total weight of the recycled asphalt mixture, new aggregate may be included in the range of 0 to 85% by weight and fresh asphalt 0 to 5% by weight.

Circulating aggregate can be obtained by grinding waste asphalt concrete to a certain size or less.

Hereinafter, the present invention will be described in more detail by way of examples. However, the following examples are illustrative of the present invention, and the scope of the present invention is not limited to the following examples.

1. Experimental material

(1) New Asphalt AP5: Asphalt with penetration level of 60 ~ 80 Asphalt with penetration level of 70 (PG 64-22), AP5 is used as a new asphalt mixed with waste asphalt when evaluating asphalt properties

(2) New Asphalt AP3: Asphalt with Penetration Class 80 ~ 100 Asphalt with Penetration Penetration 90 (PG58-22), AP3 is used as a new asphalt mixed with waste asphalt when evaluating asphalt properties

(3) Waste AP (Old AP): Asphalt extracted from waste asphalt concrete using the test method of KS F 2396, Asphalt Recovery Method from Rotary Concrete Generator by Rotary Distillation (Infiltration: 21, PG 82-12)

(4) Regeneration Additive: ACF1000, a commercially available regeneration additive from Interchimica, Italy.

(5) Toluenediamine-based polyol (TDA-OH): Toluenediamine-based polyol included in the mesophilic regeneration additive according to an embodiment of the present invention was prepared and used as follows. Toluenediamine was put into a high pressure reactor at 110 to 160 ° C and melted. 10 equivalents of propylene oxide and 10 equivalents of ethylene oxide were added per 1 equivalent of toluenediamine, and 0.05 equivalents of KOH was added as a reaction catalyst. The reaction mixture was stirred for 1 hour, and then cooled to room temperature to obtain a toluenediamine-based polyol represented by the following Chemical Formula 2.

[Formula 2]

(6) Viscosity improver: A viscosity improver used polyethylene wax having a melt viscosity of 100 cps at 140 ° C and a melting point of 110 ° C.

(7) New aggregate: As the new aggregate used, 19 mm, 13 mm, fine aggregate three kinds of aggregates were used, the percentage of each passing weight is shown in Table 1 below.

division
Sieve weight percentage (%) 25 mm 20 mm 13 mm 10 mm 5 mm
(#4) 2.5 mm
(#8) 0.6 mm
(# 30) 0.3 mm
(# 50) 0.15 mm
(# 100) 0.08 mm
(# 200) 19 mm 100 99.7 44.6 2.2 0.1 0.1 0.1 0.1 0.1 0.1 13 mm 100 100 100 78.4 5.9 0.7 0.4 0.4 0.4 0.4 Fine aggregate 100 100 100 100 96.1 62.8 25.9 18 9.3 3

(8) Circulating Aggregate (Waste Ascon): Asphalt (waste asphalt) content of 5% by weight of circulating aggregate was used, and the percent by weight after extraction of circulating aggregate is shown in Table 2 below.

division Sieve Weight Percentage (%) 25 mm 20 mm 13 mm 10 mm 5 mm
(#4) 2.5 mm
(#8) 0.6 mm
(# 30) 0.3 mm
(# 50) 0.15 mm
(# 100) 0.08 mm
(# 200) Circulating aggregate 100 100 98.8 88.9 64.6 48.9 26.7 19 12.2 6.9

(9) Synthetic Grain Size of Aggregate: The synthetic particle size mixing ratio of the aggregate is as shown in Table 3 below, and the percent by weight of the synthetic grain is shown in Table 4 below. The composite particle size of the aggregate met WC-3 criteria.

division Circulating aggregate 19 mm 13 mm Fine aggregate Filler  Aggregate blending ratio (%) 50 36 2 8 4

division 25 mm 20 mm 13 mm 10 mm 5 mm
(#4) 2.5 mm
(#8) 0.6 mm
(# 30) 0.3 mm
(# 50) 0.15 mm
(# 100) 0.08 mm
(# 200) WC-3
standard at least 100.0 90.0 72.0 56.0 35.0 23.0 10.0 5.0 3.0 2.0 maximum 100.0 100.0 90.0 80.0 65.0 49.0 28.0 19.0 13.0 8.0 Composite particle size 100.0 99.9 79.2 56.2 38.1 26.9 15.3 11.3 7.4 3.4

2. Experimental method

(1) Binder Property Evaluation

1) After mixing the new asphalt having an infiltration degree of 70 with asphalt and the waste asphalt collected from waste asphalt concrete at 50:50, additives were added according to Examples and Comparative Examples to evaluate binder properties (Tables 5 and 6). .

2) The penetration of asphalt was measured at 25 ° C. according to KS M 2252, and the softening point was measured according to KS M 2250.

3) After the asphalt Aging Vessel (PAV), the low-temperature properties of the asphalt were evaluated by measuring the m value of -12 ° C with a bending beam rheometer (BBR).

4) In order to evaluate crack resistance of asphalt, 15 ° C ductility of asphalt was measured according to KS M 2254.

5) The viscosity of the asphalt was measured at 140 ° C. using a rotational viscometer.

(2) asphalt mixture production and compaction performance evaluation

1) 50 parts by weight of recycled aggregate (waste ascon) heated to 130 ° C, 47.5 parts by weight of new aggregates and 2.5 parts by weight of new asphalt were prepared by adding the medium-temperature recycled asphalt additive and the heat-regenerated asphalt additive prepared at the composition ratios of Examples and Comparative Examples, respectively. In the middle, a medium temperature recycled asphalt mixture and a heated recycled asphalt mixture were prepared. In order to evaluate the compaction performance of the prepared asphalt mixture, porosity, moisture resistance evaluation, and indirect tensile strength test were performed (Table 7).

2) Tensile Strength Ratio (TSR) indicating water resistance of asphalt mixture was measured by measuring the indirect tensile strength in dry state and indirect saturation of asphalt mixture according to KS F 2398. .

3) The indirect tensile strength of the asphalt mixture was measured when loading at a rate of 50mm / min according to KS F 2382.

3. Experimental Results

(1) Asphalt Binder Properties

As described above, the binder properties of the asphalt prepared according to Examples and Comparative Examples were measured, and the results are shown in Tables 5 and 6, respectively.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Used
Asphalt (phr) AP5 50 50 50 50 50 50 Old ap 50 50 50 50 50 50 Toluenediamine Polyol (TDA-OH) (phr) 2 4 6 2 4 4 Viscosity Enhancer (phr) - - - One One 2 Penetration Degree (25 ℃, ㎜) 60 70 75 57 65 60 Softening point (℃) 53 51 49 55 53 57 Viscosity (140 ° C, cps) 398 365 352 370 332 290 Elongation (15 ℃, ㎝) 140 140 140 130 140 136 m-value (-12 ℃) 0.30 0.33 0.35 0.30 0.31 0.30

Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Used
Asphalt (phr) AP5 100 50 50 50 50 50 Old ap 0 50 50 50 50 50 Toluenediamine Polyol (TDA-OH) (phr) - - 10 - - - Viscosity Enhancer (phr) - - - 2 - - Regeneration additive (phr) - - - - 2 6 Penetration Degree (25 ℃, ㎜) 57 42 87 42 57 68 Softening point (℃) 51 58 45 58 52 50 Viscosity (140 ° C, cps) 410 590 320 410 408 365 Elongation (15 ℃, ㎝) 140 6 140 6 98 140 m-value (-12 ℃) 0.34 - 0.36 - 0.28 0.32

* Comparative Example 2 and Comparative Example 4 are broken during the measurement due to brittleness, so there is no m-value measurement

From the results shown in Tables 5 and 6, by looking at the Examples and Comparative Examples it was confirmed that by using the medium-temperature regeneration additive comprising a toluenediamine-based polyol according to the present invention exhibits the regeneration and mesophilic effect in the waste asphalt concrete Can be. In particular, through the elongation and viscosity improvement effect of Example 1 and Comparative Example 5 it can be seen that the medium-temperature regeneration additive including the toluenediamine-based polyol according to the present invention has a regeneration medium temperature effect of the waste asphalt concrete than commercially available regeneration additives have. Through Comparative Example 3, it can be seen that the use of the excess temperature regeneration additive according to the present invention softens the asphalt binder, thereby rapidly dropping the softening point. Through the m-value of the BBR test it can be seen that the medium-temperature regeneration additive according to the present invention improves the low-temperature properties (Examples 1, 3 and Comparative Examples 5, 6).

(2) compaction performance of asphalt mixture

The compaction performance of the asphalt mixture prepared according to Examples and Comparative Examples as in the above-described experimental method was evaluated and the results are shown in Table 7 below.

Example 7 Example 8 Example 9 Comparative Example 7 Comparative Example 8 Asphalt mixture used (phr) New asphalt 2.5 2.5 2.5 2.5 2.5 New aggregate 47.5 47.5 47.5 47.5 47.5 Circulating Aggregate 50 50 50 50 50 Toluenediamine Polyol (TDA-OH) (phr) 0.004 0.005 0.01 - - Regeneration additive (phr) - - - 0.004 0.005 Asphalt Concrete Manufacturing Temperature (℃) 130 ℃ 130 ℃ 130 ℃ 160 ° C 160 ° C Porosity (%) 4.1 3.9 3.8 4.0 4.3 Moisture resistance rating (TSR,%) 76.6 75.2 72.2 75.4 74.0 Indirect tensile strength (MPa) 1.19 1.06 1.02 1.10 0.98

From the results of Table 7, looking at the Examples and Comparative Examples, the mesophilic reclaimed asphalt mixture prepared using the mesophilic regeneration additive including the toluenediamine-based polyol according to the present invention satisfies the water resistance evaluation criteria of 75% or more. . Through moisture resistance evaluation and indirect tensile strength test, it was confirmed that mesophilic reclaimed asphalt mixture prepared using mesophilic regeneration additive according to the present invention showed better performance than heat regenerated asphalt mixture prepared using commercial reclaimed additive. (Examples 7, 8 and Comparative Examples 7, 8). It can be seen from Examples 7 to 9 that the use of an excess of the mesophilic regeneration additive according to the present invention lowers the strength and resistance to moisture of the asphalt mixture.

It is to be noted that the technical spirit of the present invention has been specifically described in accordance with the above-described preferred embodiments, but it is to be understood that the above-described embodiments are intended to be illustrative and not restrictive. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

Claims (14)

(1)
[Formula 1]

[In the above formula,
R ₁ and R ₂ are each

Or
Any one of R ₁ and R ₂

, The other is H,
m and n are each an integer of 0 to 15, and 3 ≦ m + n ≦ 30.]
Medium temperature reclaimed asphalt additive comprising a toluenediamine-based polyol represented by.
The method of claim 1,
m and n are each an integer of 0 to 10, wherein 5 ≦ m + n ≦ 20
Medium temperature reclaimed asphalt additive.
The method of claim 1,
Further comprising at least one viscosity improving agent selected from the group consisting of polyethylene waxes, vegetable waxes, animal waxes, surfactants, fatty acids and modified fatty acids
Medium temperature reclaimed asphalt additive.
The method of claim 3,
The viscosity improving agent is included in the range of 10 to 60 parts by weight based on 100 parts by weight of the toluenediamine-based polyol
Medium temperature reclaimed asphalt additive.
The method of claim 3,
The viscosity improving agent has a melting point of 120 ° C. or less, and a melt viscosity at 140 ° C. of 200 cPs or less.
Medium temperature reclaimed asphalt additive.
The method of claim 1,
Further comprising at least one member selected from the group consisting of antioxidants, heat stabilizers, antistatic agents and lubricants
Medium temperature reclaimed asphalt additive.
Melting toluenediamine; And
Reacting the molten toluenediamine with propylene oxide, ethylene oxide or mixtures thereof using KOH as a reaction catalyst,
(1)
[Formula 1]

[In the above formula,
R ₁ and R ₂ are each

Or
Any one of R ₁ and R ₂

, The other is H,
m and n are each an integer of 0 to 15, and 3 ≦ m + n ≦ 30.]
Method for producing a medium temperature reclaimed asphalt additive comprising a toluenediamine-based polyol represented by.
The method of claim 7, wherein
m and n are each an integer of 0 to 10, wherein 5 ≦ m + n ≦ 20
Method for producing mesophilic reclaimed asphalt additive.
The method of claim 7, wherein
After the reaction step, further comprising adding and mixing at least one viscosity improving agent selected from the group consisting of polyethylene wax, vegetable wax, animal wax, surfactant, fatty acid and modified fatty acid
Method for producing mesophilic reclaimed asphalt additive.
10. The method of claim 9,
The viscosity improving agent is included in the range of 10 to 60 parts by weight based on 100 parts by weight of the toluenediamine-based polyol
Method for producing mesophilic reclaimed asphalt additive.
The method of claim 7, wherein
The melting step is made at a temperature of 110 ~ 160 ℃
Method for producing mesophilic reclaimed asphalt additive.
The method of claim 7, wherein
After the reaction step, further comprising the step of cooling to room temperature
Method for producing mesophilic reclaimed asphalt additive. delete delete