JP2015078264A - Syrup composition for coating road surface, draining top coat, thermal insulation top coat and coating method for road surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a syrup composition for coating road surface capable of providing a cured product having low odor, water resistance and cutback resistance, a draining top coat and a thermal insulation top coat containing the cured product of the syrup composition and a coating method for road surface using the syrup composition.SOLUTION: There is provided a syrup composition for coating road surface containing a (meth)acrylate monofunctional compound having a (meth)acryloyl group (A component), an acrylic polymer (B component), a multifunctional compound having two or more (meth)acryloyl group (C component) and a plasticizer (D component) as an optional component with 30 to 85 wt.% of the (meth)acrylate monofunctional compound having no hydroxyl group and a hetero ring, 0 to 15 mass% of the (meth)acrylate monofunctional compound having no hydroxyl group other than ai component, 0 to 5 mass% of the (meth)acrylate monofunctional compound having hydroxyl group, 10 to 25 mass% of the B component and 5 to 60 mass% of the C component.

Description

  TECHNICAL FIELD The present invention relates to a road surface covering syrup composition suitable for road surface covering, and in particular, a road surface covering syrup composition suitable for a drainage top coat and a heat insulating top coat, and a cured product of the road surface covering syrup composition. The present invention relates to a drainage top coat, a heat shielding top coat, and a road surface coating method for coating with a cured product of a road surface coating syrup composition.

  Conventionally, asphalt and concrete that are supplied in large quantities at low cost have been widely used for road pavement. These have excellent water repellency, adhesiveness, elasticity, impact resistance, good workability and the like.

  Asphalt pavement is liable to decrease in rigidity at high temperatures and easily wear due to repeated loads caused by the passage of automobiles. In concrete pavement, rubbing is harder to form than asphalt, but rubbing due to wear is inevitable. Therefore, in the surface drainage type pavement, water can be accumulated in the rudder portion by rainwater or the like. If such a puddle can be formed on an automobile-only road, an expressway, or the like, a so-called “hydroplaning” phenomenon occurs in which a car tire slips on the surface of the puddle, and there is a risk that a large automobile accident will occur. There is also the problem of water splashing due to the passage of automobiles.

  In order to reduce the accumulation of water on the road, for example, by using a drainage asphalt mixture with an increased proportion of aggregate in the surface layer portion of asphalt pavement, more voids communicating with the surface layer portion are formed. . In such drainage pavement, the water on the road surface easily penetrates into the lower part through the gap in the surface layer portion, and the water pool is reduced, so that the above problem is suppressed.

  However, since the surface layer portion of such drainage pavement has a point contact bonding structure using asphalt as a bonding agent, the bonding strength is weak. Therefore, as it is, the aggregate is spattered off by the frictional force of the tire of the automobile, particularly the tire equipped with the spike tire or the chain, and the pavement is damaged. As a means for suppressing such scattering of aggregates, a method of spreading a resin liquid on the surface layer portion and curing it has been developed. As such a resin liquid, an acrylic syrup composition is known, and a cured product of this resin liquid is called a drainable top coat.

  In addition, the heat island phenomenon in which the temperature in the city center is higher than that in the surrounding area has become serious, and countermeasures against the heat island phenomenon are urgently needed. It is considered that the heat island phenomenon is caused by poor heat dissipation of asphalt and concrete pavement that covers the ground in roads and parking lots, and heat is stored in these pavements. As a countermeasure, a method of coating with a thermal barrier paint that suppresses heat conduction in the surface layer portion of the pavement has been developed. An acrylic syrup composition is also known as such a thermal barrier coating, and a cured product of the thermal barrier coating is referred to as a thermal barrier top coat.

Furthermore, recently, environmentally friendly materials have been demanded, and odor during construction has been cited as an issue.
For example, Patent Document 1 discloses a monomer (A) having a (meth) acryloyl group and a single monomer having two or more (meth) acryloyl groups as an acrylic syrup composition for covering a pavement surface of a road. A substance containing a resin (C) that is soluble in the monomer (B) and the monomer (A) is described. In addition, as the monomer (A), a heterocycle-containing (meth) acrylate (a1), an oligoethylene glycol monoalkyl ether (meth) acrylate (a2), and a hydroxyalkyl group having 2 or 3 carbon atoms It also describes containing an alkyl (meth) acrylate (a3).

JP 2007-224264 A

In Patent Document 1, as a monomer having a (meth) acryloyl group of a syrup composition, an oligoethylene glycol monoalkyl ether (meth) acrylate, and a hydroxyalkyl (meta) having a hydroxyalkyl group having 2 or 3 carbon atoms (meta) ) Compositions containing acrylates are described. A syrup composition containing a hydroxyl group-containing monomer is effective as a countermeasure against odor, but has been found to have a relatively low long-term resistance to water.
However, the cured product of the syrup composition not containing these monomers has a problem that cutback is likely to occur.

  An object of the present invention is to provide a road surface covering syrup composition having a low odor and excellent in water resistance and cut back resistance, a drainable top coat comprising the cured product of the syrup composition, and heat shielding properties. Another object is to provide a top coat and a road surface covering method using the syrup composition.

  The syrup composition for road surface coating of the present invention includes a (meth) acrylate monofunctional compound (component A) having one (meth) acryloyl group, an acrylic polymer (component B), and two or more (meth) acryloyl groups. A polyfunctional compound having a group (C component), a plasticizer (D component) as an optional component, and a hydroxyl group with respect to the total amount of the basic components composed of the A component, B component, C component and D component. (Meth) acrylate monofunctional compound (a1 component) having a heterocycle selected from the group consisting of a furan ring, a hydrofuran ring, a pyran ring and a hydropyran ring is 30 to 85% by mass, and has a hydroxyl group other than the a1 component. (Meth) acrylate monofunctional compound (a2 component) is 0 to 15% by mass, (meth) acrylate monofunctional compound (a3 component) having a hydroxyl group is 0 to 5% by mass B component 10 to 25 mass%, C component is characterized in that 5 to 60 wt%.

  Said road surface covering syrup composition may contain 20 mass% or less of D component with respect to the total amount of the said basic component.

  The drainage top coat of the present invention is characterized by comprising a cured product of any of the above-mentioned road surface coating syrup compositions.

  The road surface covering syrup composition may include 5 to 70 parts by mass of light-reflective particles with respect to 100 parts by mass of the basic component.

The heat-insulating topcoat of the present invention is characterized by comprising a cured product of the above-mentioned road surface coating syrup composition.
Moreover, the road surface coating method of the present invention is characterized in that it has a step of forming a coating film on the construction surface by applying any of the above road surface coating syrup compositions.

  When the road surface coating syrup composition of the present invention is used, a cured product excellent in low odor, water resistance and cutback resistance can be obtained.

  The syrup composition for road surface coating of the present invention has a (meth) acrylate monofunctional compound (A component) having one (meth) acryloyl group, an acrylic polymer (B component), and two or more (meth) acryloyl groups. The polyfunctional compound (C component) which has this, and also contains a plasticizer (D component) as an arbitrary component. Here, the A component, the B component, the C component, and the D component are collectively referred to as basic components.

  The syrup composition for road surface coating of the present invention has a (meth) acrylate monofunctional compound having a hetero ring selected from the group consisting of a furan ring, a hydrofuran ring, a pyran ring and a hydropyran ring as a component A, which does not have a hydroxyl group. a1 component) as an essential component, 30 to 85% by mass based on the total amount of the above basic components. Further, as the A component, a (meth) acrylate monofunctional compound (a2 component) having no hydroxyl group other than the a1 component can be contained as an optional component in an amount of 0 to 15% by mass with respect to the total amount of the above basic components. Furthermore, as component A, a (meth) acrylate monofunctional compound (a3 component) having a hydroxyl group can be contained as an optional component in an amount of 0 to 5% by mass based on the total amount of the above basic components.

  The road surface covering syrup composition of the present invention contains 10 to 25% by mass of the B component and 5 to 60% by mass of the C component with respect to the total amount of the above basic components.

  In addition, when the road surface covering syrup composition of the present invention includes an optional component D, the D component is preferably 20% by mass or less based on the total amount of the basic components.

<A component>
The component A is a (meth) acrylate monofunctional compound having one (meth) acryloyl group. In the present invention, “(meth) acryloyl group” means “acryloyl group” and / or “methacryloyl group”, “(meth) acryl” means “acryl” and / or “methacryl”, and “( “Meth) acrylate” means “acrylate” and / or “methacrylate”.
The component A in the road surface covering syrup composition of the present invention is composed of only the a1 component, or composed of the a1 component, the a2 component and / or the a3 component.

<A1 component>
The a1 component is a component involved in various physical properties such as coating workability and curability of the road surface covering syrup composition, strength of the resulting coating film, weather resistance, stain resistance, and wear resistance. The a1 component is a (meth) acrylate monofunctional compound having no hydroxyl group and having a heterocycle selected from the group consisting of a furan ring, a hydrofuran ring, a pyran ring and a hydropyran ring.
Examples of the (meth) acrylate having a furan ring include furyl methacrylate and furfuryl (meth) acrylate.

Examples of the (meth) acrylate having a hydrofuran ring include tetrahydrofuryl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, caprolactone-modified tetrahydrofurfuryl (meth) acrylate, and the like.
Examples of the (meth) acrylate having a pyran ring include pyranyl (meth) acrylate.
Examples of the (meth) acrylate having a hydropyran ring include dihydropyranyl (meth) acrylate, tetrahydropyranyl (meth) acrylate, dimethyldihydropyranyl (meth) acrylate, and dimethyltetrahydropyranyl (meth) acrylate.
A1 component may be used individually by 1 type, and may use 2 or more types together.

  The blending ratio of the a1 component in the syrup composition for road surface coating of the present invention is 30 to 85% by mass with respect to the total amount of the basic components. When the blending ratio of the a1 component is 30% by mass or more, good curability is easily obtained. When the blending ratio of the a1 component is 85% by mass or less, the viscosity of the road surface covering syrup composition applied to the pavement surface is good and the cured product is excellent in cutback resistance. The higher the blending ratio of the a1 component, the easier it is to adjust the viscosity of the road surface covering syrup composition, the coating property is excellent, the curability is good, and the tensile strength of the cured product is likely to be high. For this reason, 32 mass% or more is preferable and the mixture ratio of a1 component has more preferable 35 mass% or more. Moreover, it becomes easy to obtain a suitable viscosity, so that the mixture ratio of a1 component is low. For this reason, 83 mass% or less is preferable and the mixture ratio of a1 component has more preferable 80 mass% or less.

<A2 component>
The a2 component is a component contained together with the a1 component or together with the a1 component and the a3 component as necessary. The a2 component is a component involved in various physical properties such as coating workability and curability of the road surface coating syrup composition, strength of the resulting coating film, weather resistance, stain resistance, and abrasion resistance, and particularly curing. It is a component regarding the property and strength of the coating film. The a2 component is a (meth) acrylate monofunctional compound having no hydroxyl group other than the a1 component.

The a2 component is, for example, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, i-butyl (meth) acrylate, t-butyl (meth) acrylate, amyl ( (Meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, n-nonyl (meth) acrylate, isononyl (meth) Acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, tridecyl (meth) acrylate, stearyl (meth) acrylate, cyclohexyl (meth) acrylate, benzyl (meth) acrylate, dicyclopenteni (Meth) acrylate, 2-dicyclopentenoxyethyl (meth) acrylate, isobornyl (meth) acrylate, methoxyethyl (meth) acrylate, ethoxyethyl (meth) acrylate, butoxyethyl (meth) acrylate, 2-ethylhexyl carbitol (Meth) acrylate etc. are mentioned.
As a2 component, 1 type may be used independently and 2 or more types may be used together.

  When the road surface covering syrup composition of the present invention includes the a2 component as the A component, the blending ratio of the a2 component is 0 to 15% by mass with respect to the total amount of the basic components. When the blending ratio of the component a2 is 15% by mass or less, the odor is not worrisome when the road surface covering syrup composition is used, and the cutback resistance is improved. The blending ratio of the component a2 is preferably 12% by mass or less. The higher the blending ratio of the a2 component, the better the curability of the road surface covering syrup composition and the higher the tensile strength of the cured product. The blending ratio of the component a2 is preferably 1% by mass or more, and more preferably 2% by mass or more.

<A3 component>
The a3 component is a component contained together with the a1 component or with the a1 component and the a2 component as necessary. The a3 component is a component involved in various physical properties such as coating workability and curability of the road surface coating syrup composition, strength of the resulting coating film, weather resistance, stain resistance, and abrasion resistance, and particularly curing. It is a component regarding the property and strength of the coating film. The a3 component is a (meth) acrylate monofunctional compound having a hydroxyl group.

Examples of the a3 component include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and ethylene glycol mono (meth) acrylate. Etc.
As a3 component, 1 type may be used independently and 2 or more types may be used together.

  When the road surface covering syrup composition of the present invention includes the a3 component as the A component, the blending ratio of the a3 component is 0 to 5% by mass with respect to the total amount of the basic components. If the blending ratio of the a3 component is 5% by mass or less, the water resistance is good without extremely decreasing. The blending ratio of the a3 component is preferably 3% by mass or less. The lower the blending ratio of the a3 component, the better the water resistance of the road surface covering syrup composition. When the a3 component is included, an effect that the curability is improved and the adhesion to the base is easily improved can be obtained.

<B component>
Component B is an acrylic polymer. The component B is preferably swellable or soluble in the component a1 and / or the component a2. Component B has the effect of improving the viscosity of the road surface covering syrup composition. Further, the component B has an effect of improving the curability of the road surface covering syrup composition. Here, the acrylic polymer is a polymer containing a unit derived from a monomer having a (meth) acryloyl group.
As B component, the homopolymer or copolymer of alkyl (meth) acrylate and (meth) acrylic acid is mentioned.
B component may be used individually by 1 type, and may be used in combination of 2 or more type.

  Examples of the monomer unit constituting the B component include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, i-butyl (meth) acrylate, t- Butyl (meth) acrylate, amyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, n-nonyl ( (Meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, tridecyl (meth) acrylate, stearyl (meth) acrylate, cyclohexyl (meth) acrylate, benzyl (meth) acrylate , Dicyclopentenyl (meth) acrylate, 2-dicyclopentenoxyethyl (meth) acrylate, isobornyl (meth) acrylate, methoxyethyl (meth) acrylate, ethoxyethyl (meth) acrylate, butoxyethyl (meth) acrylate , Tetrahydrofurfuryl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, (meth) acrylic acid and the like.

  Among the above monomer units, the monomer units constituting the homopolymer include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, i- Butyl (meth) acrylate, t-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, cyclohexyl (meth) acrylate, and isobornyl (meth) acrylate are preferred, and methyl (meth) acrylate, ethyl (meth) acrylate, propyl ( More preferred are (meth) acrylate, n-butyl (meth) acrylate, cyclohexyl (meth) acrylate, and isobornyl (meth) acrylate.

  As the combination of monomer units constituting the copolymer, methyl methacrylate and n-butyl methacrylate, methyl methacrylate and i-butyl methacrylate, methyl methacrylate and ethyl acrylate, methyl methacrylate and methacrylic acid, methyl methacrylate and n-butyl Methacrylate and methacrylic acid, methyl methacrylate and ethyl acrylate and methacrylic acid are preferred, methyl methacrylate and n-butyl methacrylate, methyl methacrylate and ethyl acrylate, methyl methacrylate, n-butyl methacrylate and methacrylic acid are more preferred, methyl methacrylate and n-butyl More preferred is methacrylate.

  Tg of B component is preferably 20 ° C or higher, more preferably 40 ° C or higher. The higher the Tg of the B component, the better the surface curability of the road surface covering syrup composition. Moreover, Tg of B component is preferably 155 ° C. or less, more preferably 105 ° C. or less. The lower the Tg of component B, the better the solubility in component A. Tg is measured using a differential scanning calorimeter (DSC).

  The mass average molecular weight (hereinafter referred to as Mw) of the component B is preferably 15,000 or more, and more preferably 20,000 or more. The greater the Mw of the B component, the better the coating strength of the road surface covering syrup composition. Further, the Mw of the B component is preferably 200,000 or less, and more preferably 180,000 or less. The smaller the Mw of the B component, the better the solubility of the B component in the component A. Here, Mw is obtained by dissolving the B component in tetrahydrofuran as a solvent and converting the molecular weight measured by gel permeation chromatography (hereinafter referred to as GPC) into polystyrene.

  The blending ratio of the B component is 10 to 25% by mass with respect to the total amount of the basic components. When the blending ratio of the B component is 10% by mass or more, the curability is good. When the blending ratio of the component B is 25% by mass or less, the viscosity is not excessively increased and coating becomes easy and workability is improved. The higher the blending ratio of component B, the better the curability, so 11 mass% or more is preferable. Moreover, since the coating property is so excellent that the compounding ratio of B component is low, 23 mass% or less is preferable.

<C component>
The component C is a polyfunctional compound having two or more (meth) acryloyl groups. Component C is a component involved in the strength, water resistance, and cutback resistance of the coating film.
Examples of component C include alkanediol di (meth) acrylate such as triethylene glycol di (meth) acrylate, ethylene glycol di (meth) acrylate, 1,3-butylene glycol di (meth) acrylate, and 1,6-hexanediol di (meth) acrylate. (Meth) acrylates; polyoxyalkylene glycol di (meth) acrylates such as diethylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, polytetramethylene glycol di (meth) acrylate; ethoxylated bisphenol A di (meth) acrylate Bisphenol-modified di (meth) acrylates such as propoxylated ethoxylated bisphenol A diacrylate; neopentyl glycol di (meth) acrylate, trimethylolpropane tri ( 3) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, isocyanuric acid tris [ethyloxy (meth) acrylate], glycerin tri (meth) acrylate, etc. Functional (meth) acrylic acid ester or partial ester thereof;

Moreover, as C component, urethane (meth) acrylate, epoxy (meth) acrylate, polyester (meth) acrylate etc. are mentioned, for example.
Urethane (meth) acrylate is, for example, a known hydroxyl group-containing (meth) acrylate, a polyisocyanate having two or more isocyanate groups in one molecule, and a polyol having two or more hydroxyl groups in one molecule. What was obtained by making it react by a method can be used.

  The epoxy (meth) acrylate is obtained by, for example, reacting a polybasic acid anhydride, a partially esterified product of a hydroxyl group-containing (meth) acrylate, a bifunctional bisphenol A type epoxy resin, and an unsaturated monobasic acid by a known method. Can be used. The bifunctional bisphenol A type epoxy resin is a general-purpose epoxy resin obtained by reacting bisphenol A and epichlorohydrin.

Polyester (meth) acrylates are, for example, polybasic acids such as phthalic acid, isophthalic acid, tetrahydrophthalic acid, succinic acid, maleic acid, fumaric acid, adipic acid or the like, and polyvalent acids such as ethylene glycol and propylene glycol. What consists of an alcohol compound, a (meth) acrylic acid adduct or glycidyl (meth) acrylate, and a polybasic acid anhydride can be used.
C component may be used individually by 1 type, and may use 2 or more types together.

  The mixture ratio of C component is 5-60 mass% with respect to the total amount of a basic component. When the blending ratio of component C is 5% by mass or more, cutback resistance is improved and the strength of the coating film is increased, which is preferable. Moreover, it is easy to control the intensity | strength of the hardened | cured material of the syrup composition for road surface coatings as the mixture ratio of C component is 60 mass% or less. Since the intensity | strength of a coating film becomes high, so that the mixture ratio of C component is high, 7 mass% or more is preferable. Moreover, since the hardened | cured material becomes difficult to become weak, so that the mixture ratio of C component is low, 58 mass% or less is more preferable.

<D component>
D component is a component contained as needed. D component is a plasticizer, and is a component which aims at the softening of a coating film and reduction of shrinkage at the time of hardening.
Examples of the D component include phthalic acid esters such as dibutyl phthalate, di-2-ethylhexyl phthalate and diisodecyl phthalate; adipic acid esters such as di-2-ethylhexyl adipate and octyl adipate; dibutyl sebacate and di-2- Sebasic acid esters such as ethylhexyl sebacate; Dibasic fatty acid esters such as azelain esters such as di-2-ethylhexyl azelate and octyl azelate; Tributyl acetyl citrate; Chlorinated paraffin, normal paraffin, paraffin wax Paraffins such as the system; alkylsulfonic acid phenyl ester.

As the component D, phthalic acid esters, adipic acid esters, paraffins; alkylsulfonic acid phenyl esters are preferable, and adipic acid esters, paraffins; alkylsulfonic acid phenyl esters are more preferable.
D component may be used individually by 1 type, and may be used in combination of 2 or more type.

  When the road surface covering syrup composition of the present invention contains a D component, the blending ratio of the D component is preferably 20% by mass or less based on the total amount of the basic components. It is easy to control the intensity | strength of the hardened | cured material of the syrup composition for road surface coating as the mixture ratio of D component is 20 mass% or less. Moreover, since the intensity | strength of a coating film is so favorable that the compounding ratio of D component is low, 15 mass% or less is more preferable, and 10 mass% or less is further more preferable. Moreover, toughness can be provided to a hardening body, so that the mixture ratio of D component is high. When it contains D component, it is preferable that the mixture ratio of D component shall be 1 mass% or more, and it is more preferable to set it as 2 mass% or more. Since the effect obtained by containing D component changes with compositions, it is good to determine a mixture ratio suitably.

The road surface covering syrup composition of the present invention may contain the following components in addition to the above basic components.
<Wax>
The road surface covering syrup composition of the present invention may contain a wax. The wax is preferably contained because it exhibits an effect of improving the surface curability utilizing the air blocking effect. Examples of the wax include solid waxes. Examples of solid waxes include higher fatty acids such as paraffins, polyethylenes, and stearic acid. Of these, paraffin wax is preferred.

When using paraffin wax, it is preferable to use two or more paraffin waxes having different melting points in combination. By using two or more kinds of paraffin waxes having different melting points, sufficient air barrier action can be obtained even when the base temperature is changed when the road surface coating syrup composition is cured by coating, and the surface curability is good. Become. When using 2 or more types together, it is preferable to use the thing of the difference of melting | fusing point about 5 to 20 degreeC together.
The melting point of the paraffin wax is preferably 40 to 120 ° C. When the melting point of the paraffin wax is 40 ° C. or higher, a sufficient air barrier action can be obtained when the road surface covering syrup composition is cured by coating, and the surface curability tends to be good. When the melting point of the paraffin wax is 120 ° C. or lower, the solubility in the road surface covering syrup composition tends to be good when the road surface covering syrup composition is produced.

For the purpose of further improving the surface curability, a wax dispersion in which a wax is dispersed in an organic solvent may be used as the wax. When the wax is dispersed as fine particles in the organic solvent, the air blocking action is more effectively expressed. Such a wax dispersion is commercially available, and the wax dispersion can be added as it is when the road surface coating syrup composition of the present invention is prepared. In this case, the road surface covering syrup composition of the present invention also contains an organic solvent.
Further, the wax may be used that is dispersed in advance in the components of the road surface covering syrup composition such as the a1 component and the a2 component without using an organic solvent.

  The amount of the wax added is preferably 0.1 parts by mass or more and more preferably 0.5 parts by mass or more with respect to 100 parts by mass of the basic component from the viewpoint of balance between surface curability and physical properties of the coating film. The greater the amount of wax added, the more easily an air barrier action can be obtained when the road surface coating syrup composition is paint-cured, resulting in better surface curability. The amount of wax added is preferably 5 parts by mass or less, and more preferably 4 parts by mass or less. The smaller the amount of wax added, the better the storage stability of the road surface covering syrup composition and the better dispersibility of the wax.

<Tertiary amine>
The road surface coating syrup composition of the present invention may contain a tertiary amine. Since tertiary amine is a curing accelerator for accelerating the curing reaction of the syrup composition for road surface coating, it is preferably contained.
Examples of tertiary amines include aniline, N, N-dimethylaniline, N, N-diethylaniline, p-toluidine, N, N-dimethyl-p-toluidine, N, N-bis (2-hydroxyethyl) -p. -Toluidine, 4- (N, N-dimethylamino) benzaldehyde, 4- [N, N-bis (2-hydroxyethyl) amino] benzaldehyde, 4- (N-methyl-N-hydroxyethylamino) benzaldehyde, N, N-bis (2-hydroxypropyl) -p-toluidine, N-ethyl-m-toluidine, triethanolamine, m-toluidine, diethylenetriamine, pyridine, phenylmorpholine, piperidine, N, N-bis (hydroxyethyl) aniline N, N-substituted anilines such as diethanolaniline, N, N-substituted-p-to Discoidin, 4- (N, N- disubstituted amino) benzaldehyde, and the like.

As the tertiary amine, an aromatic tertiary amine is preferable. As the aromatic tertiary amine, those in which at least one aromatic residue is directly bonded to the nitrogen atom of the amino group are preferable.
Examples of the aromatic tertiary amine include N, N-dimethyl-p-toluidine, N, N-diethylaniline, N, N-diethyl-p-toluidine, N- (2-hydroxyethyl) N-methyl-p. -Toluidine, N, N-di (2-hydroxyethyl) -p-toluidine, N, N-di (2-hydroxypropyl) -p-toluidine; N, N-di (2-hydroxyethyl) -p-toluidine Alternatively, an ethylene oxide or propylene oxide adduct of N, N-di (2-hydroxypropyl) -p-toluidine can be used.

In addition, the aromatic tertiary amine is not limited to the p (para) isomer, and may be an o (ortho) isomer or an m (meth) isomer.
As the aromatic tertiary amine, N, N-dimethyl-p-toluidine, N, N-diethyl-p-toluidine, N, N-di (in view of reactivity and curability of the road surface coating syrup composition 2-hydroxyethyl) -p-toluidine and N, N-di (2-hydroxypropyl) -p-toluidine are preferred.
A tertiary amine may be used individually by 1 type, and may be used in combination of 2 or more type.

The tertiary amine may be added immediately before curing the road surface covering syrup composition, or may be added in advance to the road surface covering syrup composition.
The amount of tertiary amine added is preferably 0.05 parts by mass or more, and 0.2 parts by mass or more with respect to 100 parts by mass of the basic component from the viewpoint of balance between curability and pot life (workability). Is more preferable, and 0.3 mass part or more is further more preferable. As the amount of tertiary amine added increases, better surface curability tends to be obtained. The amount of tertiary amine added is preferably 10 parts by mass or less, more preferably 8 parts by mass or less, and further preferably 5 parts by mass or less. The shorter the amount of tertiary amine added, the longer the pot life.

<Other curing accelerators>
The road surface coating syrup composition of the present invention may contain a polyvalent metal soap such as cobalt naphthenate, cobalt octylate, cobalt acetoacetylate as a curing accelerator other than the tertiary amine.
The addition amount of the polyvalent metal soap is preferably 0.02 parts by mass or more, more preferably 0.05 parts by mass or more with respect to 100 parts by mass of the basic component of the metal contained in the polyvalent metal soap. preferable. The greater the content of metal contained in the polyvalent metal soap, the better the surface curability of the road surface covering syrup composition. Moreover, 2 mass parts or less are preferable, as for content of the metal contained in a polyvalent metal soap, 1 mass part or less is more preferable, and 0.5 mass part or less is especially preferable. The lower the metal content in the polyvalent metal soap, the higher the strength of the coating film and the better.
The curing accelerator may be contained when preparing the road surface coating syrup composition and stored until coating, or the road surface coating syrup composition may be added immediately before adding the curing agent during coating. You may make it contain.

<Curing agent>
When the road surface coating syrup composition of the present invention is cured, it is preferable to use a redox catalyst in which a curing accelerator and a curing agent are combined. As the curing agent, a polymerization initiator capable of initiating radical polymerization can be used. Examples of the polymerization initiator include diacyl peroxide, alkyl peroxide, ketone peroxide, and azo compound. Of these, diacyl peroxide is preferable, and benzoyl peroxide (benzoyl peroxide) is more preferable. The benzoyl peroxide is preferably in the form of a liquid, paste or powder diluted with an inert liquid or solid to a concentration of about 30 to 55% by mass from the viewpoint of handleability.
A hardening | curing agent may be used individually by 1 type, and may be used in combination of 2 or more type.

  When the above-mentioned curing agent is added to the road surface covering syrup composition, the polymerization reaction is immediately started and the road surface covering syrup composition is cured. The addition amount of a hardening | curing agent can be suitably determined so that the gelation time of the syrup composition for road surface covering may become desired time. When the road surface covering syrup composition is used as a drainage top coat or a heat shield top coat, the gelation time is generally adjusted to be 5 to 15 minutes. When the gelation time is 5 minutes or longer, the coating film tends to be uniform. Further, when the gelation time is 15 minutes or less, a sufficient pot life can be obtained and it becomes difficult to cause cutback.

  The addition amount of the curing agent varies depending on the type and cannot be generally described. However, when the curing agent is benzoyl peroxide, 0.25 parts by mass or more is preferable with respect to 100 parts by mass of the basic component, and 0.5 parts by mass or more is preferable. More preferred. The more the amount of the curing agent added, the better the curability. Moreover, 10 mass parts or less are preferable and, as for the addition amount of a hardening | curing agent, 8 mass parts or less are more preferable. There exists a tendency for the coating workability | operativity of the syrup composition for road surface coating | cover and various physical properties of the coating film obtained to become favorable, so that there are few addition amounts of a hardening | curing agent.

<Silane coupling agent>
A silane coupling agent may be added to the syrup composition for covering a road surface of the present invention for the purpose of stabilizing adhesion to a substrate and imparting durability of adhesion strength. Examples of the silane coupling agent include vinyltrichlorosilane, vinyltris (β-methoxyethoxy) silane, γ-methacryloxypropyltrimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, and γ-glucidoxy. Examples thereof include propyltrimethoxysilane and γ-mercaptopropyltrimethoxysilane.

  The addition amount of the silane coupling agent is preferably 10 parts by mass or less with respect to 100 parts by mass of the basic component, and more preferably 5 parts by mass or less from the viewpoint of surface curability and cost. By making the addition amount of the silane coupling agent 10 parts by mass or less, the surface curability is improved while maintaining the adhesion of the road surface coating syrup composition to the base material.

<Polymerization inhibitor>
A polymerization inhibitor may be added to the syrup composition for road surface coating of the present invention for the purpose of improving storage stability and adjusting the polymerization reaction. Examples of the polymerization inhibitor include dibutylhydroxytoluene, hydroquinone, hydroquinone monomethyl ether and the like.
The addition amount of the polymerization inhibitor is preferably 0.001 part by mass or more and more preferably 0.002 part by mass or more with respect to 100 parts by mass of the basic component. The greater the amount of polymerization inhibitor added, the better the storage stability. Moreover, 0.1 mass part or less is preferable and, as for the addition amount of a polymerization inhibitor, 0.08 mass part or less is more preferable. The smaller the amount of the polymerization inhibitor added, the easier the adjustment of the polymerization reaction is preferred.

<Other polymer components>
The syrup composition for road surface coating of the present invention includes, as necessary, other polymer components not corresponding to the B component, such as styrene / butadiene copolymer, vinyl chloride / vinyl acetate copolymer, cellulose acetate butyrate resin, epoxy. Resins and the like can also be contained.

<Other additives>
An ultraviolet absorber, a light-resistant stabilizer, an antifoaming agent, etc. can be added to the syrup composition for road surface covering of this invention as an additive in arbitrary ratios. Moreover, you may add thixotropic agents, such as antioxidant, a leveling agent, and an aerosil, as an additive. Furthermore, as additives, inorganic pigments such as chromium oxide, bengara and iron oxide, organic pigments such as phthalocyanine blue may be added, and resistant pigments such as calcium carbonate may be added.

  Examples of the ultraviolet absorber include 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-octyloxybenzophenone, 2-hydroxy-4-decyloxybenzophenone, 2-hydroxy-4,4′-dimethoxybenzophenone, 2-hydroxy Derivatives of 2-hydroxybenzophenone such as -4,4'-dibutoxybenzophenone, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 2- (2'-hydroxy-3 ', 5'-diter (Shariibutylphenyl) benzotriazole or a halide thereof, phenyl salicylate, p-tertiarybutylphenyl salicylate, and the like. These ultraviolet absorbers may be used alone or in combination of two or more.

  Examples of the light-resistant stabilizer include bis (2,2,6,6-tetramethyl-4piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, 1- [2 -[3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionyloxy] ethyl] -4- [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionyloxy] -2,2,6,6-tetramethylpiperidine, 4-benzoyloxy-2,2,6,6-tetramethylpiperidine and the like. These light-resistant stabilizers may be used alone or in combination of two or more.

  Examples of the antifoaming agent include known antifoaming agents. Specific examples include an acrylic antifoaming agent in which a special acrylic polymer is dissolved in a solvent, a vinyl antifoaming agent in which a special vinyl polymer is dissolved in a solvent, and the like, which are commercially available from Enomoto Kasei Co., Ltd. Dispalon series (Product names: OX-880EF, OX-881, OX-883, OX-77EF, OX-710, OX-8040, 1922, 1927, 1950, P-410EF, P-420, P-425, PD-7, 1970, 230, 230HF, LF-1980, LF-1982, LF-1983, LF-1984, LF-1985, etc.) are more preferred, and among the Disparon series, 230, 230HF, LF-1980 LF-1985 is more preferable, and 230 and LF-1985 are particularly preferable. Moreover, as an antifoamer, BYK-052 and BYK-1752 marketed by Big Chemie Japan are preferable.

<Drainable top coat / Heat shield top coat>
The road surface covering syrup composition of the present invention is particularly suitable for a composition for forming a drainable top coat or a heat insulating top coat used for asphalt pavement such as dense grain, fine grain, open grain asphalt or concrete pavement. Used for. That is, the hardened | cured material of the syrup composition for road surface coating | cover of this invention is suitable as a drainage topcoat or a heat-insulating topcoat.

(Drainable top coat)
The drainable top coat of the present invention is made of a cured product of the road surface covering syrup composition of the present invention. Therefore, the drainable topcoat of the present invention does not bother odor during coating, and has excellent water resistance and cutback resistance. Therefore, the drainable topcoat of the present invention can effectively prevent the separation of the aggregate from the road surface and the clogging of the gap.
The drainage topcoat of the present invention is obtained by applying the road surface covering syrup composition of the present invention to drainage pavement or the like to form a cured product of the road surface covering syrup composition.
The drainage top coat of the present invention can also be used for colorization of bus lanes, highway service areas or parking areas, ETC lanes, and the like.

(Thermal barrier top coat)
The heat-shielding topcoat of the present invention is made of a cured product of the road surface coating syrup composition of the present invention containing light-reflective particles. Therefore, the heat-insulating topcoat of the present invention does not bother odor during coating, and has excellent water resistance and cutback resistance.
Moreover, since the heat-insulating topcoat of the present invention contains light-reflective particles and reflects and emits infrared rays of sunlight, it has little heat absorption. Therefore, the serious heat island phenomenon in an urban area can be relieved by forming the heat-insulating top coat of the present invention on a road surface such as asphalt or concrete covering the ground.

<Aggregate>
When the road surface covering syrup composition of the present invention is used as a composition for forming a drainable top coat or a heat-insulating top coat, the road surface covering syrup composition may be used by containing an aggregate. preferable. When forming a drainable topcoat or a heat-shielding topcoat, usually two layers of an undercoat layer and an overcoat layer are formed. The undercoat layer and / or the overcoat layer of the drainage top coat and / or the heat-shielding top coat preferably contain an aggregate for preventing slippage.

Examples of the aggregate used include natural mineral ores such as dredged sand, river sand, cold water stone, emery and marble, alumina, slag, glass, ceramic aggregate, pottery, porcelain, tile, glass beads, colored aggregate and the like. These can be used alone or in combination of two or more. In particular, when the undercoat layer and the overcoat layer are colored, it is preferable to use the same color ceramic aggregate as the aggregate. Further, as the aggregate, an artificial stone obtained by curing unsaturated polyester resin, acrylic resin, epoxy resin, phenol resin or the like may be used.
A preferred aggregate particle size is 0.01 to 3 mm, more preferably 0.1 to 2 mm.

The aggregate is contained in the drainage top coat or the heat-insulating top coat by a method in which the aggregate is applied to the coating film immediately after the road surface covering syrup composition is applied to form the coating film. It is preferable. 0.1-1 kg / m < ² > is preferable and, as for the dispersion | distribution amount of the aggregate to the coating film which consists of a syrup composition for a road surface coating, More preferably, it is 0.2-0.8 kg / m < ² >.
In addition, the aggregate is preliminarily contained in the road surface covering syrup composition when the drainage top coat or the heat insulating top coat is formed by coating the road surface covering syrup composition without using a coating machine. You may keep it.

<Light reflective particles>
When the road surface covering syrup composition of the present invention is used as a composition for forming a heat-shielding topcoat, light reflecting particles are contained in the road surface covering syrup composition. The light reflective particles exhibit absorption in the visible region and reflect in the near infrared region. Therefore, by incorporating light-reflective particles into the road surface covering syrup composition, absorption of heat energy in the heat-insulating top coat, which is a cured product thereof, can be suppressed, and an increase in the temperature of the heat-insulating top coat can be prevented.

  As the light reflective particles, for example, hollow particles can be used. Since the hollow particles are excellent in heat insulating properties, they are preferable as the light reflecting particles of the heat shielding top coat. The hollow particles used as the light-reflecting particles are preferably hollow inorganic particles in terms of strength and heat insulation. In particular, transparent or translucent hollow ceramic particles are suitable because sunlight or the like can be reflected in the surface layer and the shell, and since it has a high long wave emissivity. Here, the long wave emissivity is the conversion efficiency when the absorbed heat is emitted again as infrared rays. When transparent or translucent hollow ceramic particles are contained in the heat-shielding top coat, even when the heat-shielding top coat absorbs heat, the temperature rise of the heat-shielding top coat can be effectively suppressed. That is, the transparent or translucent hollow ceramic particles impart a high heat-shielding effect to the heat-shielding top coat by having reflectivity, heat insulation, and radiation.

The strength of the hollow ceramic particles used as the light reflecting particles is preferably 3.9 N / mm ² or more, and the average particle size is preferably about 5 to 150 μm.
Examples of the hollow ceramic particles include hollow particles made of a zirconia / titania composite, hollow particles made of a silicon boride ceramic, a shirasu balloon, and a glass balloon.

Further, as the light-reflective particles, for example, a pigment having a solar reflectance of 12% or more in a region of 350 to 2100 nm defined by JISA5759 (sunlight shielding / film for preventing glass scattering) may be used. Here, the solar reflectance data is measured for a coating film in a sufficiently concealed state, specifically, a coating film having a concealment ratio of about 1.0.
Examples of the pigment having a solar reflectance of 12% or more used as the light-reflecting particles include black pigments or dark pigments close to them; coloring such as yellow pigments, red pigments, blue pigments, and green pigments Pigments; and white pigments.

Specific examples of black or near dark pigments include azomethiazo black pigments under the trade name Chromo Fine Black A-1103 (manufactured by Dainichi Seika Kogyo Co., Ltd.), trade name Dipiroxide Brown 9270 (Daiichi Seika Kogyo) Product name) Daipyroxide Side Brown 9290 (manufactured by Dainichi Seika Kogyo Co., Ltd.) and the like.
Specific examples of yellow pigments include monoazo yellow (trade name: Hoster Palm Yellow H3G, manufactured by Hoechst Co., Ltd.).
Specific examples of the red pigment include iron oxide (trade name: Toda Color 120ED, manufactured by Toda Kogyo Co., Ltd.), quinacridone red (trade name: HostaperRedE2B70, manufactured by Hoechst Co., Ltd.), and the like.
Specific examples of the blue pigment include phthalocyanine blue (trade name: cyanine blue SPG-8, manufactured by Dainippon Ink & Chemicals, Inc.).
Specific examples of the green pigment include phthalocyanine green (trade name: cyanine green 5310, manufactured by Dainichi Seika Kogyo Co., Ltd.).
The white pigment is not particularly limited, and specific examples include titanium oxide and zinc white. Titanium oxide can be applied to both rutile type and anatase type, and rutile type titanium oxide is preferably used.

The light reflective particles may be used alone or in combination of two or more. When a pigment is used as the light-reflecting particles, it is preferable to blend 5 to 70 parts by mass of the pigment with respect to 100 parts by mass of the basic component. When hollow particles are used as the light-reflecting particles, it is preferable to blend 5 to 70 parts by mass of the hollow particles with respect to 100 parts by mass of the basic component.
When a pigment and hollow ceramic particles are used as the light reflecting particles, it is more preferable to blend 5 to 55 parts by mass of pigment and 5 to 15 parts by mass of hollow ceramic particles with respect to 100 parts by mass of the basic component.

  When hollow particles are used as the light-reflecting particles, the hollow particles have a specific gravity smaller than 1, so that they tend to float on the surface of the road surface covering syrup composition. For this reason, the monomer on the surface layer of the road surface covering syrup composition volatilizes to cause a so-called skinning phenomenon, which may deteriorate the storage stability. Therefore, it is preferable to add a thixotropic agent when hollow particles are contained in the road surface covering syrup composition.

  As the thixotropic agent, organic thixotropic agents such as fatty acid amide, organic bentonite, and oxidized polyethylene wax are preferable. If necessary, fine silica is used in combination. Examples of the thixotropic agent combination include a fatty acid amide / fine silica combination, an organic bentonite / fine silica combination, a fatty acid amide / organic bentonite / fine silica combination, and an oxidized polyethylene wax / fine silica combination. The average primary particle diameter of the fine silica is preferably 7 to 40 μm.

  By including the thixotropic agent, structural viscosity is imparted to the road surface covering syrup composition. As a result, the hollow particles can be uniformly distributed in the road surface covering syrup composition, and the storage stability of the road surface covering syrup composition is improved. Moreover, the hollow particles can be uniformly distributed in the coating film formed by applying the syrup composition for road surface coating.

  When the thixotropic agent is a combination of fatty acid amide / organic bentonite / fine silica, the total content of the thixotropic agent is 0.5 to 5 with respect to 100 parts by mass of the basic component. It is preferable that a mass part and a fine-particle silica are 1-10 mass parts. When the content of the thixotropic agent is too small, it becomes difficult to uniformly distribute the hollow particles in the paint. On the other hand, when the content of the thixotropic agent is too large, the fluidity of the road surface covering syrup composition is deteriorated, which is not practical.

<Coating method>
The road surface covering syrup composition of the present invention can be used as a covering material for floor surfaces, wall surfaces, road paving surfaces, and the like. Examples of a method for coating a construction surface such as a floor surface, a wall surface, and a road pavement surface include a method of forming a coating film on the construction surface by coating the road surface covering syrup composition of the present invention. When the coating film is cured, a coating layer made of a cured product is formed on the construction surface. As the coating layer, it is preferable to form two layers of an undercoat layer and an overcoat layer (topcoat) formed thereon.

  Examples of the coating method of the road surface coating syrup composition include a known coating method using a roller, a gold trowel, a brush, a flexible bow, a coating machine (such as a spray coating machine), and the like. When the road surface coating syrup composition is applied using a two-component airless coating machine, it is preferable to use a method in which the road surface coating syrup composition is divided into two liquids on the main agent side and the curing agent side. In this case, it is desirable to add a curing accelerator to the main agent side of the road surface coating syrup composition and to add, for example, benzoyl peroxide as a curing agent to the curing agent side.

  When the road surface covering syrup composition of the present invention is used as a coating material, the viscosity of the road surface covering syrup composition may be appropriately selected in consideration of coating workability. Although the viscosity of the syrup composition for road surface coating is not particularly limited, for example, 100 to 1000 mPa · s is preferable, and 150 to 800 mPa · s is particularly preferable. When the viscosity of the syrup composition for road surface coating is low, a uniform coating film is difficult to obtain, and the curability may be lowered and may not be sufficiently cured. Moreover, when the viscosity of the road surface covering syrup composition is too high, the coating workability and the self-leveling property are lowered.

  Moreover, -20-60 degreeC is preferable and the temperature at the time of coating has especially preferable -5-40 degreeC. The gelation time during coating is preferably in the range of 5 to 15 minutes from the viewpoint of cutback resistance and workability. The gelation time (curing time) can be adjusted by adjusting the amount of the curing agent and the curing accelerator according to the temperature at the time of coating.

  Hereinafter, the present invention will be specifically described with reference to examples. The present invention is not limited to these examples. “Parts” in the examples all represent “parts by mass”. Moreover, about content of components other than a1 component, a2 component, a3 component, B component, C component, and D component (basic component), it shows with content (mass part) with respect to 100 mass parts of basic components.

[Example S-1]
Production of syrup composition S-1:
In a 1 L container equipped with a stirrer and a condenser, 70 parts of tetrahydrofurfuryl methacrylate (hereinafter abbreviated as “THFMA”), a mixture of dodecyl methacrylate and stearyl methacrylate (dodecyl methacrylate / stearyl methacrylate mass ratio 4/6, below) "SLMA".) 4 parts, triethylene glycol dimethacrylate (hereinafter abbreviated as "3EDMA") 6 parts, EO-modified bisphenol A dimethacrylate (Daiichi Kogyo Seiyaku, trade name: New Frontier BPE-4) (Hereinafter abbreviated as “BPE-4”) 5 parts, paraffin wax having a melting point of 55 ° C. (hereinafter abbreviated as “wax 1”) 0.6 part, paraffin wax having a melting point of 66 ° C. (hereinafter abbreviated as “wax 2”) .) 0.4 parts paraffin wax (melting point 75 ° C.) 3 ”, N, N-bis (2-hydroxyethyl) -p-toluidine (hereinafter abbreviated as“ Amine 1 ”), 2.2 parts, antifoam (BIC Chemie Japan) Manufactured, trade name: BYK-1752), 0.5 parts of dibutylhydroxytoluene (BHT) as a polymerization inhibitor is added, and while stirring, methyl methacrylate (MMA) / n-butyl methacrylate (n-BMA) = 80/20 copolymer (Tg = 84 ° C., Mw = 80,000, hereinafter abbreviated as “Polymer 1”) is added in 15 parts, heated at 70 ° C. for 2 hours, dissolved, and then cooled to 45 ° C. did. Further, 5 parts of a wax dispersion (BIC Chemie Japan Co., Ltd., trade name, BYK-S780, hereinafter abbreviated as “wax 4”) was added, and the mixture was stirred and dispersed well for 1 hour. 1 was obtained.

[Examples S-2 to S-9, Comparative Examples S-10 to S-11]
Production of syrup compositions S-2 to S-11:
Except making it the ratio of Table 1, it carried out similarly to manufacture of syrup composition S-1, and obtained syrup composition S-2 to S-11. In addition, when not mix | blending the wax 4, after heating at 70 degreeC for 2 hours and melt | dissolving, it cooled to 45 degreeC and obtained the syrup composition.

  In Table 1, DEGMMA is diethylene glycol monomethyl ether methacrylate, EHOA is 2-ethylhexyl carbitol acrylate, 2-HEMA is 2-hydroxyethyl methacrylate, 2-HPMA is 2-hydroxypropyl methacrylate, polymer 2 is MMA / n-BMA = 60 / 40 copolymer (Tg = 65 ° C., Mw = 42,000), PGDMA is polypropylene glycol dimethacrylate, plasticizer 1 is alkylsulfonic acid phenyl ester, and plasticizer 2 is phthalic acid ester.

[Examples R-1 to R-9, Comparative examples R-10 to R-11]
Production of road surface coating syrup compositions R-1 to R-11:
In the total mass part of each syrup composition of S-1 to S-11, benzoyl peroxide (manufactured by NOF Corporation, hereinafter abbreviated as “NIPER NS”) as a curing agent and polyvalent metal soap as a curing acceleration aid A certain naphthenic acid cobalt (made by Nippon Kagaku Sangyo Co., Ltd., trade name; naphthex cobalt 6% (T), hereinafter abbreviated as “naphthenic acid Co”) is added at a ratio shown in Table 2 and mixed to prepare a syrup composition for road surface coating. R-1 to R-11 were prepared.

[Evaluation]
(Odor)
A road surface coating syrup composition to which a curing agent and a curing accelerator auxiliary agent were added was applied to a 30 cm square slate plate with a roller so as to have a thickness of 0.5 kg / m ² and cured.
The odor was determined based on the following criteria as a sensitivity test to determine whether or not the odor was felt when the road surface coating syrup composition was applied by a roller.
○: All three felt no odor.
X: One or more of the three felt odor.

(water resistant)
A road surface coating syrup composition to which a curing agent and a curing accelerator auxiliary agent were added was poured into a cell cast under an environment of 23 ° C. and cured. Ten dumbbell-shaped No. 1 pieces were molded with a punching tool specified in JIS K 6251 “Vulcanized rubber and thermoplastic rubber” with a cured resin cured at a thickness of 2 mm.

Ten of the molded pieces were subjected to a tensile test using a tensile tester (Tensilon universal tensile tester), and the maximum tensile strength (unit: N / mm ² ) was measured. However, the tensile speed of JIS K 6251 is 500 mm / min, but in the present invention, it was 20 mm / min.
Five test pieces molded as described above were immersed in pure water for 10 days in a 23 ° C. environment. After being immersed for 10 days, the test piece was taken out, wiped off moisture, left in an air environment at 23 ° C. for 3 hours, and then subjected to a tensile test using a tensile tester in the same manner as described above to measure the maximum tensile strength.

The water resistance was evaluated according to the following criteria.
○: Maximum tensile strength after water immersion / maximum tensile strength before water immersion = 0.6 or more ×: Maximum tensile strength after water immersion / maximum tensile strength before water immersion = less than 0.6

As shown in the results of Table 2, the road surface covering syrup compositions of Examples R-1 to R-9 have a low odor, and the cured product has good water resistance.
On the other hand, Comparative Example R-10 in which the C component is small and the a3 component is greater than the specified blending ratio has poor water resistance. Further, Comparative Example R-11 having more a2 component than the specified blending ratio was unfavorable because of odor.

[Examples F-1 to F-9, Comparative Example F-10]
Production of syrup composition F-1 to 10 for drainage top coat:
10 parts of MRT-60 (product name, manufactured by Ryokan) is mixed and stirred as a bengara colorant in the total mass part of each syrup composition of S-1 to S-9 and S-11, and further as a curing agent. Nyper NS and naphthenic acid Co, which is a hardening accelerator, were added at the ratio shown in Table 3 and mixed to prepare syrup compositions F-1 to F-10 for drainable topcoat.

[Evaluation]
(Stationary test)
A test specimen for a stationary test was prepared using syrup composition for drainable topcoat (hereinafter referred to as drainable topcoat composition) F-1 to F-10. That is, using an air spray (product name: spray gunweider 88, manufactured by Anest Iwata Co., Ltd.) on an open grain asphalt plate (size: length 300 mm, width 300 mm, thickness 50 mm, manufactured by Oari Construction Co., Ltd.), an air pressure of 0.3 to A drainage topcoat composition is primed at 0.4 MPa so that the coating amount is 500 g / m ^2, and an anti-slip aggregate (manufactured by Mishu Kosan Co., Ltd., product name: Cerasand A1) is immediately applied. It sprayed so that quantity might be set to 250 g / m < ² >. On top of that, the same drainage topcoat composition was overcoated in the same manner, and immediately, the non-slip aggregate was sprayed in the same manner. This was cured at room temperature (23 ° C. ± 2 ° C.) to obtain a specimen for a stationary test.

In the stationary test, a mixture stationary tester manufactured by Intesco was used, and the durability of the tire against the stationary test was evaluated under the following test conditions. The results are shown in Table 3.
Installed car tire: 14-inch radial tire for passenger cars. Test specimen drive system, specimen repeat angle: ± 30 ° Repeat speed: 6 rpm. Load load: 3KN.
The measurement was performed on a specimen at 23 ° C. ± 2 ° C. The determination was made by visually counting the number of peeled portions of the coating layer after the stationary test, and evaluating and determining based on the following criteria.
○: 10 or less ×: 11 or more peeling points

(Curing time and gelation time)
About 110 g to 120 g of drainable topcoat composition F-1 to F-10 containing a curing agent is put into a test tube having a diameter of 10 mm and a length of 120 mm from the bottom to 70 mm, and a thermocouple is connected to the drainable topcoat composition It was put in the center in the depth direction. While the test tube was allowed to stand in 23 ° C. water to cure the drainable topcoat composition, the heat generation temperature was measured over time by the thermocouple.
The time from the addition of the curing agent to the time when the maximum exothermic temperature was reached was determined, and this time was taken as the curing time. Moreover, the time until the fluidity | liquidity of the remaining drainable topcoat composition put into the test tube was lost (gelation) was calculated | required, and this time was made into gelation time. Each result is shown in Table 3.

As shown in the results of Table 3, the cured products of the drainage topcoat compositions of Examples F-1 to F-9 have good stationary tests and are less likely to cause cutback.
On the other hand, the drainage topcoat composition of Comparative Example F-10 having more a2 component than the prescribed blending ratio is x in the stationary test, and cutback is likely to occur.

[Examples H-1 to H-3]
[Syrup composition for thermal barrier top coat]
To the total mass part of the syrup composition obtained in Example S-1, 8.3 parts of a black pigment (product name: Chromofine Black A-1103, manufactured by Dainichi Seika Kogyo Co., Ltd.) is mixed as light-reflective particles. Then, glass beads having a particle size of 2.1 mm were added as a dispersion medium, and the pigment was dispersed using a desktop batch mill so that the pigment became 10 microns or less. After removing the glass beads with gauze, fine silica and organic bentonite as thixotropic agents and glass balloons as light reflecting particles were added to the mixture so as to have the blending amounts shown in Table 4, and mixed thoroughly. Next, 1 part of naphthenic acid Co, which is a hardening accelerating aid, was added and stirred uniformly. Further, Nyper NS was added as a curing agent to obtain a syrup composition H-1 for a heat-shielding top coat.

Moreover, except having changed into the mixing | blending of Table 4, it carried out similarly to manufacture of syrup composition H-1, and obtained syrup compositions H-2 and H-3.
In Table 4, the dark brown pigment is Dipiroxide Brown 9270 (product name) manufactured by Dainichi Seika Kogyo Co., Ltd., the yellow pigment is Hoster Palm Yellow H3G (product name) manufactured by Hoechst, the blue pigment is phthalocyanine blue, and the white pigment is Titanium oxide.

[Evaluation]
(Stationary test)
A stationary test specimen was prepared using each of the obtained syrup compositions H-1 to H-3 for a thermal barrier topcoat. That is, using an air spray (product name: spray gunweider 88, manufactured by Anest Iwata) on a dense-grained asphalt plate (size: length 300 mm, width 300 mm, thickness 40 mm, manufactured by Oari Construction Co., Ltd.), an air pressure of 0.3 to The coating was applied at 0.4 MPa at a coating amount of 1 kg / m ^2, and immediately, silica sand No. 5 was sprayed as an anti-slip aggregate so that the spraying amount was 250 g / m ² . This was cured at room temperature (23 ° C. ± 2 ° C.) to obtain a specimen for a stationary test. Using the obtained specimen, the durability of the tire against the stationary was evaluated in the same manner as the stationary test described above. The results are shown in Table 4.

  As shown in the results of Table 4, the specimens coated with the cured products of the heat-shielding topcoat syrup compositions of Examples H-1 to H-3 were cut back in the same manner as the drainage topcoat composition. Is suppressed, and it is recognized that it has good performance.

  The syrup composition of the present invention has a low odor, and the cured product is excellent in water resistance and cut back resistance, so that it is useful for road surface covering applications such as road pavement surfaces. Suitable for coating.

Claims (6)

A (meth) acrylate monofunctional compound (component A) having one (meth) acryloyl group, an acrylic polymer (component B), and a polyfunctional compound (component C) having two or more (meth) acryloyl groups Including
Furthermore, a plasticizer (component D) is included as an optional component,
The total amount of the basic component consisting of the A component, B component, C component and D component does not have a hydroxyl group and has a heterocycle selected from the group consisting of a furan ring, a hydrofuran ring, a pyran ring and a hydropyran ring The (meth) acrylate monofunctional compound (a1 component) is 30 to 85% by mass, and the (meth) acrylate monofunctional compound (a2 component) having no hydroxyl group other than the a1 component is 0 to 15% by mass and has a hydroxyl group (meth). A road surface covering syrup composition in which the acrylate monofunctional compound (a3 component) is 0 to 5 mass%, the B component is 10 to 25 mass%, and the C component is 5 to 60 mass%.   The syrup composition for road surface covering according to claim 1, wherein the D component is 20% by mass or less based on the total amount of the basic components.   A drainable top coat comprising a cured product of the road surface covering syrup composition according to claim 1 or 2.   The road surface covering syrup composition according to claim 1 or 2, comprising 5 to 70 parts by mass of light-reflective particles with respect to 100 parts by mass of the basic component.   A heat-shielding top coat comprising a cured product of the road surface covering syrup composition according to claim 4.   The road surface coating method which has the process of applying the syrup composition for road surface coating | cover as described in any one of Claim 1, Claim 2, and Claim 4 to a construction surface, and forming a coating film.