JP2014129460A - Colorable binder composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a colorable binder composition which does not spoil workability even when production of mixture or compaction upon the actual construction is carried out at a low temperature and retains the strength (durability to rutting: DS value) required for colored pavement.SOLUTION: The colorable binder composition comprises: a petroleum-based solvent extracted oil; a petroleum resin; 4-8 mass% of a hydrogenated thermoplastic elastomer in which a first hydrogenated thermoplastic elastomer having a 10%-toluene solution viscosity at 25°C in the range of 1000-2500 mPa*s and a second hydrogenated thermoplastic elastomer having a 10%-toluene solution viscosity at 25°C in the range of 5-50 mPa*s are mixed; and 0.3-2 mass% of an anti-stripping agent, where a content of the first hydrogenated thermoplastic elastomer in the whole hydrogenated thermoplastic elastomer is 34-49 mass%.

Description

  The present invention relates to a binder composition that can be colored by adding a pigment or the like, and more particularly to a colorable binder composition that is suitable for use in a color pavement constructed in parks, sidewalks, and the like.

  In general, when a color pavement is constructed on a park, a sidewalk, or the like, a binder composition that can be colored by adding a pigment or the like is used. As such a color pavement binder composition, for example, there is a composition in which a petroleum resin and / or a thermoplastic elastomer and a petroleum softener are blended at a predetermined ratio, and an antioxidant or the like is added as necessary. .

  Usually, since the color paving binder composition is exposed to the outdoors for a long period of time, it is necessary to minimize deterioration due to moisture, heat, oil, ultraviolet rays, and the like. Therefore, conventionally, in order to improve the weather resistance, hydrogenated petroleum resins and hydrogenated thermoplastic elastomers in which double bonds in the molecule are reduced by adding hydrogen are used as petroleum resins and thermoplastic elastomers, respectively. Color pavement binder compositions have been proposed (see, for example, Patent Documents 1 and 2). In addition, a binder composition for color pavement using the hydrogenated petroleum resin and hydrogen thermoplastic elastomer described above, and changing the softening agent from petroleum-based solvent extracted oil to petroleum-based lubricating base oil with less aromatics and double bonds. The thing is also proposed (for example, refer patent document 3).

  On the other hand, there is also a binder composition for color pavement in consideration of the influence on the environment and the human body (for example, see Patent Documents 4 and 5). In the binder composition described in Patent Document 4, a petroleum heavy oil having a polycyclic aromatic hydrocarbon content of 3% by mass or less and an aromatic content reduced to 15% by mass or less is used as a softening agent. ing. In the binder composition described in Patent Document 5, a petroleum aromatic hydrocarbon oil having a polycyclic aromatic compound content of less than 3% by mass is used as a softening agent.

  A paving mixture that requires a binder and aggregate such as asphalt needs to melt the binder and cover the aggregate. For this reason, it is necessary to heat to a considerably high temperature for the production and paving from the viewpoint that the binder needs to be melted. In particular, in color paving using a colorable binder composition to which a modifier such as a thermoplastic elastomer is added, heating at around 170 ° C. is generally required as a mixing temperature during production, and a compaction temperature during paving is also required. The temperature does not fall below 130 ° C. For this reason, there is a problem that a great amount of energy is required for heating the binder during production and paving, and at that time, a greenhouse gas typified by carbon dioxide is generated.

JP 2001-172469 A JP 2001-329117 A JP 2002-206047 A JP 2003-301111 A JP 2005-256450 A

  The present invention has been devised in view of the above-mentioned problems, and the object thereof is not to impair the workability even when the mixture is manufactured or compacted at the time of implementation at a low temperature. Another object of the present invention is to provide a colorable binder composition that retains the strength (digging resistance: DS value) required for color paving.

  In order to solve the above-mentioned problems, the present inventors have optimized the hydrogenated thermoplastic elastomer itself added as an essential component to the colorable binder composition, thereby reducing the viscosity of the binder and coloring. Focusing on the fact that the strength required for pavement (drilling resistance: DS value) can be obtained, intensive studies were conducted.

  As a result, the first hydrogenated thermoplastic elastomer having a 10% toluene solution viscosity at 25 ° C. in the range of 1000 to 2500 mPa · s and the 10% toluene solution viscosity at 25 ° C. in the range of 5 to 50 mPa · s. It is experimentally demonstrated that the viscosity of the binder can be reduced and the strength required for color paving (digging resistance: DS value) can be obtained by mixing the hydrogenated thermoplastic elastomer 2 with a predetermined ratio. As a result, the inventors have invented a polymer-modified asphalt composition that can solve the above-described conventional problems.

  The colorable binder composition according to claim 1, comprising a petroleum solvent extract oil, a petroleum resin, and a first hydrogenated thermoplastic elastomer having a 10% toluene solution viscosity at 25 ° C in the range of 1000 to 2500 mPa · s. And a hydrogenated thermoplastic elastomer in which a 10% toluene solution viscosity at 25 ° C. is mixed with a second hydrogenated thermoplastic elastomer in the range of 5 to 50 mPa · s: 4 to 8% by mass; 0.3-2 mass% is contained, The content rate of the said 1st hydrogenated thermoplastic elastomer in the said whole hydrogenated thermoplastic elastomer is 34-49 mass%, It is characterized by the above-mentioned.

  The colorable binder composition according to claim 2 is the invention according to claim 1, wherein the first hydrogenated thermoplastic elastomer has a 10% toluene solution viscosity at 25 ° C. in the range of 1400 to 2000 mPa · s. The second hydrogenated thermoplastic elastomer has a 10% toluene solution viscosity at 25 ° C. in the range of 10 to 40 mPa · s, and the content of the first hydrogenated thermoplastic elastomer in the entire thermoplastic elastomer is 37 to 46%.

  The colorable binder composition according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the hydrogenated thermoplastic elastomer: 5 to 7% by mass.

  According to the present invention having the above-described configuration, the first hydrogenated thermoplastic elastomer having a 10% toluene solution viscosity at 25 ° C. in the range of 1000 to 2500 mPa · s, and the 10% toluene solution viscosity at 25 ° C. of 5 to 5%. By mixing the second hydrogenated thermoplastic elastomer in the range of 50 mPa · s at a predetermined ratio, the viscosity of the binder can be lowered while keeping the digging resistance (DS value) high. Become. For this reason, it is possible to manufacture and pave even under temperature conditions lower by 30 ° C or more than conventional asphalt binders for color pavement, and further provide a colorable binder composition capable of obtaining the strength required for color pavement. It becomes possible to do.

  Hereinafter, embodiments of a colorable binder composition to which the present invention is applied will be described in detail.

  The polymer-modified asphalt composition to which the present invention is applied is a first hydrogenated thermoplastic elastomer having a petroleum solvent extract oil, a petroleum resin, and a 10% toluene solution viscosity at 25 ° C. in the range of 1000 to 2500 mPa · s. And a hydrogenated thermoplastic elastomer in which a 10% toluene solution viscosity at 25 ° C. is mixed with a second hydrogenated thermoplastic elastomer in the range of 5 to 50 mPa · s: 4 to 8% by mass; 0.3-2 mass% is contained.

  At this time, the content of the first hydrogenated thermoplastic elastomer in the entire hydrogenated thermoplastic elastomer is set to 34 to 49%.

  Hereinafter, the details of each component of the polymer-modified asphalt composition to which the present invention is applied and the reasons for limiting the numerical values will be described.

Petroleum-based solvent extracted oil Petroleum-based solvent extracted oil is described in “The Production of Petroleum Products” on page 101, FIG. As described above, in the process of producing lubricating oil from crude oil, it is an oily substance rich in aromatics and naphthenes obtained by solvent extraction, generally having a boiling point (under atmospheric pressure) of 350 ° C. or higher, a viscosity of 5 to 100 cSt / 100 ° C., Preferably 30 to 100 cSt / 100 ° C., penetration (JIS K2207) 1000 or more, softening point (JIS K2207) 20 ° C. or less, especially 45 wt% or more of aromatic and naphthene content (by ring analysis) The flash point is preferably 240 ° C. or higher.

Petroleum resin Petroleum resin is a polymer of decomposition products when naphtha is thermally decomposed to produce ethylene, propylene, and the like, and those having a high content of cyclopentadiene (CPD) or dicyclopentadiene (DCPD) High softening point. It is a colorless to pale yellow resin having a molecular weight of about 200 to 2000, generally 1000 to 1500, and a softening point of 100 to 150 ° C.

Hydrogenated thermoplastic elastomer: 4-8 mass Hydrogenated thermoplastic elastomer is a hydrogenated addition of a double bond of a diene block in the molecule of an unhydrogenated thermoplastic elastomer, and acts as a structural material. It is a component that imparts flexibility to the binder composition.

  The hydrogenated thermoplastic elastomer used for the colorable binder composition according to the present invention is a mixture of a first hydrogenated thermoplastic elastomer and a second hydrogenated thermoplastic elastomer specified below.

  The first hydrogenated thermoplastic elastomer has a 10% toluene solution viscosity at 25 ° C. in the range of 1000 to 2500 mPa · s. The first hydrogenated thermoplastic elastomer is not particularly limited as long as the hydrogenation rate is 95% or more, but the end segment is a polystyrene segment, and the rubber component segment is a double layer such as polyethylene or polybutylene. A linear or branched block copolymer which is a segment not containing a bond is preferable. Examples of such a hydrogenated thermoplastic elastomer include SEBS (styrene-ethylene-butylene-styrene block copolymer), SEPS (styrene-ethylene-propylene-styrene block copolymer), and the like. Among these block copolymers, the molecular weight is 50000 or more, the MFR (melt flow rate) (200 ° C., 5 kg) is 10 g / min or less, the polystyrene content is 10 to 50% by mass, and the specific gravity is 0.9 or more. Are more preferred.

  The first hydrogenated thermoplastic elastomer has a higher molecular weight because the viscosity of the 10% toluene solution at 25 ° C. is 1000 to 2500 mPa · s. Here, when the viscosity of the 10% toluene solution at 25 ° C. of the first hydrogenated thermoplastic elastomer is smaller than 1000 mPa · s, the molecular weight becomes too low, and thus the molecular weight of the second hydrogenated thermoplastic elastomer having a lower molecular weight. And the difference is smaller. As a result, the interaction between the first hydrogenated thermoplastic elastomer and the second hydrogenated thermoplastic elastomer is exerted, and a desired modification effect cannot be obtained. On the other hand, if the viscosity of the 10% toluene solution at 25 ° C. of the first hydrogenated thermoplastic elastomer is larger than 2500 mPa · s, the viscosity of the polymer-modified asphalt composition is remarkably increased due to the excessively high molecular weight. It is not preferable because it becomes difficult to mix and aggregate with the aggregate at a low temperature.

  The first hydrogenated thermoplastic elastomer desirably exhibits the above-described effects even more suitably when the 10% toluene solution viscosity at 25 ° C. is in the range of 1400 to 2000 mPa · s. Become.

  The second hydrogenated thermoplastic elastomer has a 10% toluene solution viscosity at 25 ° C. in the range of 5 to 50 mPa · s. The type of the second hydrogenated thermoplastic elastomer is not particularly limited as long as the hydrogenation rate is 95% or more, but the end segment is a polystyrene segment and the rubber component segment is a double layer such as polyethylene or polybutylene. A linear or branched block copolymer which is a segment not containing a bond is preferable. Examples of such a hydrogenated thermoplastic elastomer include SEBS (styrene-ethylene-butylene-styrene block copolymer), SEPS (styrene-ethylene-propylene-styrene block copolymer), and the like. Among these block copolymers, the molecular weight is 50000 or more, the MFR (melt flow rate) (200 ° C., 5 kg) is 10 g / min or less, the polystyrene content is 10 to 50% by mass, and the specific gravity is 0.9 or more. Are more preferred.

  Since the second hydrogenated thermoplastic elastomer has a 10% toluene solution viscosity at 25 ° C. of 5 to 50 mPa · s, the second hydrogenated thermoplastic elastomer has a higher molecular weight. Here, when the viscosity of the 10% toluene solution at 25 ° C. of the second hydrogenated thermoplastic elastomer is smaller than 5 mPa · s, it is not preferable because the molecular weight becomes too low to obtain a desired modification effect. On the other hand, when the 10% toluene solution viscosity at 25 ° C. of the second hydrogenated thermoplastic elastomer is larger than 50 mPa · s, the difference from the molecular weight of the higher molecular weight first hydrogenated thermoplastic elastomer is reduced. As a result, the interaction between the first hydrogenated thermoplastic elastomer and the second hydrogenated thermoplastic elastomer is exerted, and a desired modification effect cannot be obtained.

  Note that the second hydrogenated thermoplastic elastomer desirably exhibits the above-described effects even more suitably when the viscosity of the 10% toluene solution at 25 ° C. is in the range of 10 to 40 mPa · s. Become.

  Thus, in the present invention, the first hydrogenated thermoplastic elastomer, which is a hydrogenated thermoplastic elastomer having a high 10% toluene solution viscosity at 25 ° C., and the hydrogenated thermoplastic resin having a low 10% toluene solution viscosity at 25 ° C. By combining two types of thermoplastic elastomers, the second hydrogenated thermoplastic elastomer, which is an elastomer, the softening point can be lowered as compared with the conventional polymer-modified asphalt, and the overall viscosity can be lowered. Even under low temperature conditions, aggregates can be mixed, manufactured, and constructed. In addition, sufficient strength can be expressed by the interaction between the first hydrogenated thermoplastic elastomer and the second hydrogenated thermoplastic elastomer, and the digging resistance (DS value) is kept high. It becomes possible to do.

  That is, the present inventors have found a composition for satisfying the contradictory performances of low temperature characteristics and mechanical characteristics of asphalt compositions in a well-balanced manner.

  Here, when the amount of the whole hydrogenated thermoplastic elastomer is expressed by the mass sum of the first hydrogenated thermoplastic elastomer and the second hydrogenated thermoplastic elastomer, the first hydrogenated thermoplastic elastomer in the whole hydrogenated thermoplastic elastomer The content of the hydrogenated thermoplastic elastomer needs to be 34 to 49% by mass, preferably 37 to 46% by mass.

  Moreover, if the amount of the whole hydrogenated thermoplastic elastomer is less than 4% by mass with respect to the whole binder composition, the above-described performance cannot be sufficiently exhibited. Further, when the total amount of the hydrogenated thermoplastic elastomer exceeds 8% by mass with respect to the entire binder composition, the above-described effect is saturated and the amount of the expensive thermoplastic elastomer added is increased. As a result, there is a problem that the cost of the raw material is remarkably increased. That is, even when the content of the hydrogenated thermoplastic elastomer exceeds 8% by mass, the low-temperature characteristics and mechanical characteristics of the asphalt composition are not significantly improved, and it is disadvantageous in terms of raw material costs. It becomes.

  For this reason, the content of the thermoplastic elastomer needs to be 4 to 8% by mass with respect to the total mass of the polymer-modified asphalt composition. In addition, in order to exhibit the effect mentioned above more suitably, it is desirable that the content of the thermoplastic elastomer is 5 to 7% by mass.

Anti-peeling agent: 0.3-2% by mass
In the present invention, it is preferable to add an anti-peeling agent in order to prevent exfoliation of the asphalt composition and the aggregate.

  Dimer acid can be suitably used as an anti-peeling agent, but this dimer acid is produced by polymerization of C18 unsaturated fatty acid using vegetable oils and fats as raw materials. By including this dimer acid in the binder composition, it acts to prevent peeling from the aggregate when it is mixed with the aggregate. In the present invention, dimer acid is used as a preferred anti-peeling agent, but is not limited thereto.

  In addition to the dimer acid, a resin acid may be used as the anti-peeling agent.

  Resin acid is a C20 polycyclic diterpene having a carboxyl group, and contains rosin containing any one or more of abietic acid, dehydroabietic acid, neoabietic acid, pimaric acid, isopimaric acid, and parastrinic acid That is.

  As the rosin, gum rosin, wood rosin, tall oil rosin and the like are used. These rosins can be classified as gum rosin, wood rosin, etc. as described above depending on the origin, raw materials, and collection method, but are obtained as a residual component at the time of steam distillation of pine resin. This rosin is a mixture containing, as components, abietic acid, parastrinic acid, neoabietic acid, dehydroabietic acid, pimaric acid, sandaracopimaric acid, isopimaric acid and the like. This rosin usually softens at about 80 ° C. and melts at 90-100 ° C. Note that rosin contains various resin acids such as abietic acid, dehydroabietic acid, dihydroabietic acid, tetrahydroabietic acid, parastrinic acid, neoabietic acid, and levopimaric acid. It may be used alone.

  This peeling prevention agent contains 0.3-2 mass% with respect to the total mass of a binder composition. If the content of the anti-peeling agent is less than 0.3% by mass, delamination occurs when mixed with the aggregate, and the stability of the binder composition as the final product cannot be improved. On the other hand, if the content of the anti-peeling agent exceeds 2% by mass, not only the effect of improving the stability is saturated but also the amount of the expensive anti-peeling agent added is increased. There arises a problem that the cost of raw materials is remarkably increased. That is, even if the content of the anti-peeling agent exceeds 2% by mass, the stability is not significantly improved any more, but it is disadvantageous in terms of raw material costs.

  Moreover, it is preferable that this peeling inhibitor is contained in the range of 0.3 to 1% by mass with respect to the total mass of the binder composition. By setting the upper limit of the content of the anti-peeling agent to 1% by mass, it is possible to improve the stability of the binder composition while suppressing an increase in raw material costs as much as possible, and to improve cost effectiveness. Can do.

  The present invention will be specifically described below with reference to test methods, examples and comparative examples used in the present invention, but the present invention is not limited to these examples. In the following examples, when only% is described, it indicates mass%.

  In the present invention, as shown in Table 1, with respect to samples obtained for experimental investigation, penetration (25 ° C.), softening point, viscosity (180 ° C.) are used as tests for confirming the properties of the binder. A property test consisting of the following items was conducted. Further, the DS value was measured as a test for confirming the mechanical strength through the excavation resistance of the mixture obtained by mixing the binder composition and the aggregate. Hereinafter, a detailed test method will be described.

  The penetration (25 ° C.) was measured by JIS K 2207 “Petroleum Asphalt—Penetration Test Method”. This value is preferably 40 (0.1 mm) or more.

  The softening point was measured by JIS K 2207 “Petroleum Asphalt—Softening Point Test Method”.

Viscosity (180 ° C.) is suitable for the viscosity of the measuring temperature 180 ° C., the spindle SC4-21 used, and the measured object in accordance with the conditions of JPI-5S-54-99 “Viscosity Test Method Using Asphalt-Rotational Viscometer”. The measurement was performed at a spindle speed of 20 to 50 rpm.
The DS value (dynamic stability) was 30 cm in length, 30 cm in width, prepared using each polymer-modified asphalt composition and the aggregates shown in Table 2, with the amount of asphalt in the mixture being 5.0% by weight, A sheet-like specimen having a thickness of 5 cm was used, and measurement was performed in accordance with a wheel tracking test method stipulated in the pavement survey and test method manual (edited by the Japan Road Association). Japanese roads have been experimentally confirmed to reach a temperature of about 60 ° C in summer. In this state, when a car passes over the vehicle, it is deformed by flow and digging or the like occurs. The wheel tracking test is a test designed to experimentally confirm the degree of occurrence of this digging, and is a test conducted to evaluate the dynamic stability, which is an index of flow resistance in pavement materials. It is. Specifically, in a constant temperature bath maintained at 60 ° C., a tire loaded with a predetermined load was reciprocated for 1 hour on a specimen (specimen), and the amount of deformation was measured.

  The DS value (times / mm) is as follows using the deformation amount (mm) for 15 minutes from 45 minutes to 60 minutes after the start of the test and the number of times of running the tire (times) for 15 minutes from 45 minutes to 60 minutes after the start of the test. It calculates | requires using Numerical formula (2) of these.

  DS value (times / mm) = (number of times the tire travels between 45 minutes and 60 minutes (times)) / (deformation amount between 45 minutes and 60 minutes (mm)) ...・ (1)

  The higher the DS value, the higher the strength of the asphalt, which means that a paving material that is strong against digging can be provided.

  (About Examples 1-3 and Comparative Examples 1-3)

  Hereinafter, in order to verify the effect of the modified asphalt composition to which the present invention is applied, examples and comparative examples using SBS as a hydrogenated thermoplastic elastomer as a modifier will be described in detail.

  Samples composed of petroleum solvent extracted oil, petroleum resin, hydrogenated thermoplastic elastomer, and anti-peeling agent having the blending ratios shown in Examples 1 to 3 and Comparative Examples 1 to 3 in Table 1 were prepared.

  The properties of the petroleum-based solvent extracted oil used in this verification are as follows: typical viscosity at 100 ° C. is 68 mPa · s, aromatic content is 33 mass%, naphthene content is 26 mass%, and paraffin content is 41 mass%. The flash point is 254 ° C. As for the properties of petroleum resins, typical properties are a softening point of 140 ° C., an acid value defined by JIS K0070 of 0.1 mg KOH, a bromine number defined by JIS K2543 of 25 g, and a polyethylene conversion measured by the GPC method. The average molecular weight is about 1000.

  The hydrogenated thermoplastic elastomer used in this verification is of two types: hydrogenated thermoplastic elastomer 1 and hydrogenated thermoplastic elastomer 2. The hydrogenated thermoplastic elastomer 1 corresponds to the first hydrogenated thermoplastic elastomer described above, and SEBS having a 10% toluene solution viscosity at 25 ° C. of 1700 mPa · s and a styrene / butadiene ratio of 32/68. It is. The hydrogenated thermoplastic elastomer 2 corresponds to the above-mentioned second hydrogenated thermoplastic elastomer, and the 10% toluene solution viscosity at 25 ° C. is 24 mPa · s, and the styrene / butadiene ratio is 42/58. It is a certain SEBS. That is, the hydrogenated thermoplastic elastomer 2 has a higher styrene ratio than the hydrogenated thermoplastic elastomer 1.

  Moreover, the measuring method of the 10% toluene solution viscosity at 25 ° C. can be measured with a Brookfield (BL) viscometer as described in, for example, JP-A-2008-31267.

  In Examples 1 to 3 and Comparative Examples 1 to 3 of the present invention, the anti-peeling agent is dimer acid (carbon number 36, acid) in order to exhibit anti-peeling properties and compatibility with the aggregate. A tall oil fatty acid dimerization product having a value of 190 to 210).

  After the petroleum-based solvent extract oil, petroleum resin, and anti-peeling agent are mixed with a homomixer so as to have the mixing ratios of Examples 1 to 3 and Comparative Examples 1 to 3 in Table 1, and maintained at about 195 ° C A hydrogenated thermoplastic elastomer and an anti-peeling agent were added. Stirring was carried out for 3 hours with a homomixer rotating at 3500 rpm. The production amount at that time was 1.8 kg. Next, the prepared asphalt and aggregate were mixed at 140 ° C., and a predetermined specimen was molded (consolidated) at 115 ° C. and used for the test.

  In the following verification, when the penetration is 50 (1/10 cm) or more, the viscosity at 180 ° C. is 270 mPa · s or less, and the DS value is 800 or more, it is determined that the intended effect of the present invention is achieved. ing.

  In Comparative Example 1, the ratio of the hydrogenated thermoplastic elastomer 1 in the entire hydrogenated thermoplastic elastomer is 50% by mass. In Comparative Example 1, the viscosity at 180 ° C. exceeds 270 mPa · s, and even if an actual specimen is to be produced, mixing is insufficient and molding is impossible, and the DS value cannot be measured. It was.

  In Comparative Example 2, the ratio of the hydrogenated thermoplastic elastomer 1 in the entire hydrogenated thermoplastic elastomer is 33.3% by mass. In Comparative Example 2, the viscosity at 180 ° C. was preferable at 270 mPa · s or less, but the DS value was 600 (times / mm), and thus the viscosity was less than 800 (times / mm).

  In Comparative Example 3, the ratio of the hydrogenated thermoplastic elastomer 1 in the entire hydrogenated thermoplastic elastomer is 16.7% by mass. In Comparative Example 3, the viscosity at 180 ° C. was suitable at 113 mPa · s or less, but since the DS value was 440 (times / mm), it was less than 800 (times / mm).

  Examples 1 to 3 are blends in which the content of the hydrogenated thermoplastic elastomer and the content of the first hydrogenated thermoplastic elastomer in the entire hydrogenated thermoplastic elastomer are all within the range defined in the present invention. .

  In Examples 1 to 3, the ratio of the hydrogenated thermoplastic elastomer 1 in the entire hydrogenated thermoplastic elastomer was gradually increased from Examples 1 to 3 to 45.8% by mass, 41.7% by mass, and 37.5% by mass. I am letting. As a result, in Examples 1 to 3, the viscosity at 180 ° C. is 270 mPa · s or less, and the DS value is 800 (times / mm) or more.

  That is, the ratio of the hydrogenated thermoplastic elastomer 1 in the whole hydrogenated thermoplastic elastomer is 50% by mass, and the ratio of the hydrogenated thermoplastic elastomer 1 in the whole hydrogenated thermoplastic elastomer is 45.8% by mass. It is shown that there is a significant difference in effect, especially in DS values, with certain Example 1. For this reason, when the ratio of the hydrogenated thermoplastic elastomer 1 in the entire hydrogenated thermoplastic elastomer is 49% by mass or less, it is experimentally shown that both the DS value and the softening point exhibit better properties. It is shown that it was able to be verified.

  Moreover, the ratio of the hydrogenated thermoplastic elastomer 1 in the whole hydrogenated thermoplastic elastomer and the comparative example 2 in which the ratio of the hydrogenated thermoplastic elastomer 1 in the entire hydrogenated thermoplastic elastomer is 33.3% by mass, and 37.5 masses. It is shown that there is a significant difference in effect, especially in the DS value, with Example 3, which is%. For this reason, when the ratio of the hydrogenated thermoplastic elastomer 1 in the entire hydrogenated thermoplastic elastomer is set to 34% by mass or more, it is experimentally demonstrated that both the DS value and the softening point exhibit better properties. It is shown that it was able to be verified.

  Thus, according to the present invention, the first hydrogenated thermoplastic elastomer having a 10% toluene solution viscosity at 25 ° C. in the range of 1000 to 2500 mPa · s, and the 10% toluene solution viscosity at 25 ° C. of 5 to 50 mPa · s. It was experimentally verified that by mixing the second hydrogenated thermoplastic elastomer in the range of s at a predetermined ratio, not only the softening point but also the DS value showed excellent properties.

Claims (3)

Petroleum-based solvent extraction oil;
Petroleum resin,
A first hydrogenated thermoplastic elastomer having a 10% toluene solution viscosity at 25 ° C. in the range of 1000 to 2500 mPa · s, and a second water having a 10% toluene solution viscosity at 25 ° C. in the range of 5 to 50 mPa · s. Hydrogenated thermoplastic elastomer mixed with added thermoplastic elastomer: 4 to 8% by mass;
Anti-peeling agent: 0.3 to 2% by mass,
The colorable binder composition, wherein the content of the first hydrogenated thermoplastic elastomer in the entire hydrogenated thermoplastic elastomer is 34 to 49% by mass. The first hydrogenated thermoplastic elastomer has a 10% toluene solution viscosity at 25 ° C. in the range of 1400 to 2000 mPa · s,
The second hydrogenated thermoplastic elastomer has a 10% toluene solution viscosity at 25 ° C. in the range of 10 to 40 mPa · s,
The colorable binder composition according to claim 1, wherein the content of the first hydrogenated thermoplastic elastomer in the entire thermoplastic elastomer is 37 to 46%. The hydrogenated thermoplastic elastomer: 5 to 7% by mass is contained. The colorable binder composition according to claim 1 or 2.