JPH10219100A - Composition for paving material and paved body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition having sufficient strength, capable of exhibiting excellent water resistance, chemical resistance, durability and resistance to discoloring and useful for walking pathway of pool facility, etc., by using a specific normal temperature-curable type acrylurethane binder. SOLUTION: This composition for paving material is obtained by compounding (A) aggregate particles (preferably having 0.3-5mm particle diameter from the viewpoint of executability and surface smoothness of paving body) with (B) a copolymer composed of >=5wt.% (meth)acrylate (B1 ) having OH and <=95wt.% monomer (B2 ) having ethylenic unsaturated group other than the component ethylenic unsaturated group other than the component B1 ) and having 1,000-20,000 number-average molecular weight (e.g. a copolymer obtained by subjecting a prescribed amount of the components B1 and B2 to high- temperature continuous polymerization at 170-230 deg.C), (C) a non-yellowing type organic polyisocyanate (preferably being liquid at a normal temperature, e.g. hexamethylene diisocyanate) and (D) a catalyst and as necessary, further, (E) a low-molecular weight polyhydric alcohol.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pavement material composition and a pavement body which can be used for walk paths such as pool facilities, city and park facilities, and is particularly suitable for landscape pavement. The present invention relates to a pavement composition and a pavement having excellent discoloration resistance, durability and chemical resistance, comprising an aggregate particle and a room temperature-curable acrylic urethane binder, and can be awarded in the field of construction and civil engineering. Things.

[0002]

2. Description of the Related Art Since the color of conventional pavement is limited to black asphalt or gray of cement, various studies have been made for harmony with the environment. As one example, there is a method in which a crushed product of colored sand or stone is used as aggregate particles, and a cured product of a composition obtained by mixing them with a binder is used as a floor material, a pavement, or the like. Conventionally, an epoxy resin has been mainly used as a binder used for this purpose. Epoxy resins have excellent adhesiveness to aggregates such as sand, but have poor water resistance, in that the resulting cured products deteriorate when exposed to rain and wind. In addition, when the cured product is used for paving a walking path in a pool facility, there is also a problem of chemical resistance that the cured product is deteriorated due to hypochlorous acid in the pool water. In addition, depending on the conditions used, there is a problem in discoloration resistance and durability, such as discoloration and deterioration due to natural conditions such as snow and snow and sunlight. The present inventors have developed a pavement composition and a pavement in which the cured product obtained has sufficient strength as a pavement, is excellent in water resistance and chemical resistance, and is also excellent in durability and discoloration resistance. In order to do so, we conducted intensive studies.

[0003]

Means for Solving the Problems In order to solve the above problems, the present inventors have found that a pavement composition and a pavement using a specific room-temperature-curable acrylic urethane binder are effective. The present invention has been completed. Hereinafter, the present invention will be described in detail.

[0004]

DETAILED DESCRIPTION OF THE INVENTION

○ Aggregate particles Various types of aggregate particles used in the present invention, such as natural aggregate particles and artificial aggregate particles, can be used. Examples of natural aggregate particles include those obtained by crushing natural inorganic substances such as sand, stone and rock. As the artificial aggregate particles, artificially processed industrial waste, crushed glass products such as glass beads, glass bottles, and glass plates can be used. or,
As the aggregate particles, those obtained by coloring these can also be used. The shape of the aggregate particles is not particularly limited and may be uniform or non-uniform, and may be circular, flat, elliptical,
Triangles and polygons can be mentioned. The particle size of the aggregate particles may be selected according to the purpose, but is preferably 0.3 to 5 mm in consideration of workability and surface smoothness of the pavement. These aggregate particles can be used in combination of two or more kinds.

[0005] A filler can be used in combination with the aggregate particles. As the filler, for example, calcium carbonate powder,
Fine particles and powders such as clay, talc, barium sulfate powder, alumina powder, silica sand powder, mica, aluminum hydroxide, silica powder, dry ash, and plastics.

Binder In the pavement composition of the present invention, a copolymer having a hydroxyl group (A) (hereinafter referred to as a hydroxyl group-containing copolymer) and a component (A) are used as a binder for binding aggregate particles.
(B) A curable binder composed of a non-yellowing organic (poly) isocyanate is used. Hereinafter, the components (A) and (B) will be described.

Component (A) In the present invention, as the hydroxyl group-containing copolymer of the component (A), 1
One or more types of (meth) acrylates having at least one hydroxyl group (hereinafter referred to as (meth) acrylates containing hydroxyl group) and a monomer having one ethylenically unsaturated group other than the (meth) acrylate (hereinafter referred to as ethylenic) Copolymers with one or more unsaturated monomers).

Various hydroxyl group-containing (meth) acrylates can be used. For example, hydroxyalkyl (meth) acrylates such as hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate and hydroxybutyl (meth) acrylate, Polyhydric alcohol mono- or poly (meth) acrylates such as erythritol tri (meth) acrylate and glycerin mono (meth) acrylate; and epoxides such as adducts of cyclohexene oxide with (meth) acrylic acid and (meth) acrylic acid. Adducts.

As the ethylenically unsaturated monomer, various ones other than the above-mentioned hydroxyl group-containing (meth) acrylate can be used, for example, styrene, acrylonitrile, methacrylonitrile, vinyl acetate and (meth) acrylate. Is mentioned. Specific examples of (meth) acrylate include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and 2- (meth) acrylate. Examples include ethoxyethyl (meth) acrylate and isobornyl (meth) acrylate.

The copolymerization ratio of the hydroxyl group-containing (meth) acrylate in the hydroxyl group-containing copolymer used in the present invention is based on the total amount with the ethylenically unsaturated monomer.
It is necessary to be 5% by weight or more, and a preferable upper limit is less than 95% by weight because a low-viscosity copolymer is obtained.
It is more preferably from 15 to 60% by weight, particularly preferably from 20 to 50% by weight. When the copolymerization ratio of the hydroxyl group-containing (meth) acrylate is less than 5% by weight, the reaction with the organic polyisocyanate is insufficient, resulting in poor curing, and the pavement obtained has chemical properties, abrasion resistance and tensile properties. On the other hand, if it exceeds 95% by weight, the obtained pavement becomes too hard and has poor flexibility. The preferred hydroxyl value of the copolymer is 50 to 450 mgK
OH / g, more preferably 80 to 300 mg KO
H / g. If the hydroxyl value is less than 50 mgKOH / g, the strength of the obtained cured product may be insufficient and may be brittle. If it exceeds 450 mgKOH / g, the resulting pavement may be too hard and flexible. May be insufficient.

The number average molecular weight of the copolymer is 1,000 to 1,000.
Must be 20,000, preferably 1,000
〜１０10,000. If the number-average molecular weight is less than 1,000, the resulting elastic pavement has poor flexibility, while if it exceeds 20,000, the viscosity becomes high, and the production of the composition described below will be increased. In this case, it becomes difficult to mix the aggregate particles, and the workability such as construction of the composition becomes poor. In the present invention, the number average molecular weight and the weight average molecular weight are values obtained by using tetrahydrofuran as a solvent and converting the molecular weight measured by gel permeation chromatography (hereinafter abbreviated as GPC) into polystyrene.

As a copolymer of a hydroxyl group-containing (meth) acrylate and an ethylenically unsaturated monomer, a method known in the art, for example, a method of preparing a copolymer containing a hydroxyl group-containing (meth) acrylate in the presence of a polymerization solvent and a thermal polymerization initiator. Those produced by solution polymerization or the like in which an ethylenically unsaturated monomer is heated and stirred can be used. In this case, the reaction temperature depends on the monomer used,
The type of thermal polymerization initiator, decomposition temperature, or half-life, may be appropriately selected depending on the boiling point of the polymerization solvent and the like, but usually 50 to 120
C is appropriate. The thermal polymerization initiator is not particularly limited, and examples thereof include azonitrile-based initiators and peroxide-based initiators generally used in thermal polymerization. Examples of the azonitrile initiator include 2,2′-azobisisobutyronitrile, 2,2′-azobis (2-methylbutyronitrile) and 2,2-′azobis (2,4-dimethylvaleronitrile) And the like, and examples of the peroxide-based initiator include hydrogen peroxide, di-t-butyl peroxide, and benzoyl peroxide. The amount of the thermal polymerization initiator used is 0.01 to 1 based on 100 parts by weight of the total amount of the hydroxyl group-containing (meth) acrylate and the ethylenically unsaturated monomer.
It is preferably 0 parts by weight. The polymerization solvent is not particularly limited, either, as long as it can dissolve the produced copolymer. For example, aromatic hydrocarbons such as toluene and xylene, ethyl acetate, butyl acetate, cellosolve acetate,
Methyl propylene glycol acetate, carbitol acetate, methyl propylene glycol acetate,
Examples thereof include acetate esters such as carbitol acetate and ethyl carbitol acetate, and ketones such as acetone and methyl ethyl ketone. The amount of the polymerization solvent used is 10 to 90 as the solid content concentration of the obtained copolymer.
It is preferable that the amount is such that the amount becomes% by weight. Further, in the present invention, since the molecular weight distribution of the obtained hydroxyl group-containing copolymer becomes small, a monomer mixture comprising a hydroxyl group-containing (meth) acrylate and an ethylenically unsaturated monomer, a polymerization solvent, and thermal polymerization start A suitable method is to heat and agitate a part of the mixed solution comprising the agents to start the reaction, and then to drop the remainder of the mixture into the reaction solution sequentially.

The copolymer which is particularly suitable as the component (A) of the present invention is obtained by mixing a hydroxyl group-containing (meth) acrylate and an ethylenically unsaturated monomer at 170 to 330 ° C., preferably at 2 to 30 ° C.
It is a copolymer obtained by continuous polymerization at a high temperature of 30 to 280 ° C. According to this high-temperature continuous polymerization method, a low-molecular-weight, low-viscosity hydroxyl-containing copolymer can be obtained, and the polymerization method does not require the use of a thermal polymerization initiator or uses a thermal polymerization initiator. Even in this case, a copolymer having the desired molecular weight can be obtained with a small amount of use, so that the copolymer has a high purity and contains almost no impurities that generate radical species by heat or light, and the resulting pavement has high resistance. It can be excellent in discoloration and weather resistance. Further, a copolymer having a lower polydispersity than that obtained by conventional solution polymerization can be obtained.

As the high-temperature continuous polymerization method, JP-A-57-50217
No. 1, 59-6207, 60-215007, etc. may be used. For example, a pressurizable reactor is filled with a solvent, and after a predetermined temperature is set under pressure, a monomer comprising a hydroxyl group-containing (meth) acrylate, an ethylenically unsaturated monomer, and, if necessary, a polymerization solvent is used. There is a method in which the body mixture is supplied to the reactor at a constant supply rate, and an amount of the reaction solution corresponding to the supply amount of the monomer mixture is withdrawn. When a polymerization solvent is used, the solvent charged into the reactor at the start of the reaction and the polymerization solvent mixed with the monomer mixture may be the same or different. As the solvent or the polymerization solvent, the same ones as described in the above solution polymerization can be used, and alcohols such as ethylene glycol, diethylene glycol, diethylene glycol ethyl ether, propylene glycol, dipropylene glycol and tripropylene glycol can be used. it can. The mixing ratio of the polymerization solvent is preferably 200 parts by weight or less based on 100 parts by weight of the monomer mixture. Also, in the monomer mixture,
If necessary, a thermal polymerization initiator can be blended. As the thermal polymerization initiator that can be used in this case, the same ones as those described in the solution polymerization can be used. When the thermal polymerization initiator is blended with the monomer mixture, the amount is preferably 0.001 to 5 parts by weight based on 100 parts by weight of the monomer mixture. The reaction temperature is preferably from 170 to 330C, more preferably from 230 to 280C. 17
If the temperature is lower than 0 ° C., the molecular weight of the obtained copolymer may be too large or the reaction rate may be reduced. May be colored. The pressure depends on the reaction temperature and the boiling point of the monomer mixture and the solvent used, and does not affect the reaction, but may be any pressure that can maintain the reaction temperature. The residence time of the monomer mixture is preferably 2 to 60 minutes. When the residence time is less than 2 minutes, when the unreacted monomer exceeds 60 minutes, productivity may be deteriorated.

It is preferable to blend a low-molecular-weight polyhydric alcohol with the composition of the present invention, since the mechanical properties and the like of the obtained pavement can be improved. Specific examples of the low molecular weight polyhydric alcohol include ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,3-butanediol, 1,4-butanediol, 1,6-hexanediol, and 1,6-hexylene. Glycol, neopentyl glycol, 3-methyl-1,5-pentanediol, bisphenol A, trimethylolethane, trimethylolpropane, glycerin and sorbitol. When the low molecular weight polyhydric alcohol is blended, the preferred ratio is 1 to 50 parts by weight, more preferably 5 to 30 parts by weight, based on 100 parts by weight of the hydroxyl group-containing copolymer. If the amount is less than 1 part by weight, the effect of improving the mechanical properties of the obtained pavement is not sufficient, and if it is more than 50 parts by weight, the obtained pavement may be hard and brittle. Two or more low molecular weight polyhydric alcohols can be used in combination.

Component (B) In the present invention, a non-yellowing type organic polyisocyanate is used as the component (B). By using the polyisocyanate, the pavement obtained has excellent weather resistance. As the non-yellowing type organic polyisocyanate, various types can be used. In particular, those which do not need to be diluted with a solvent and show a liquid state at room temperature are preferable. Examples of the polyisocyanate include hexamethylene diisocyanate, isophorone diisocyanate, hydrogenated xylylene diisocyanate, hydrogenated diphenylmethane diisocyanate, and the like, and buret, isocyanurate, and carbodiimide modified products thereof. These polyisocyanates may be used in combination of two or more. Organic polyisocyanates other than the non-yellowing type organic polyisocyanate can also be used together within a range that does not deteriorate the discoloration resistance of the obtained pavement. Specific examples thereof include diphenylmethane diisocyanate, polymethylene polyphenyl polyisocyanate, tolylene diisocyanate, tetramethyl xylylene diisocyanate, naphthalene diisocyanate, and the like, as well as buret, isocyanurate, and carbodiimide modified products thereof.

○ Catalyst In the present invention, a catalyst is added to the composition in order to accelerate the curability of the component (A) and the component (B) as binders or the low molecular weight polyhydric alcohol used in combination therewith. As a catalyst,
Triethylamine, NN-dimethylcyclohexylamine, N, N, N'N'-tetramethylethylenediamine, N, N, N '
N'-tetramethylpropane 1,3-diamine, N, N, N'N'-
Tetramethylhexane-1,6-diamine, N, N, N ', N``N''-
Pentamethyldiethylenetriamine, N, N, N ', N``N''-
Pentamethyldipropylene-triamine, tetramethylguanidine, triethylenediamine, N, N'-dimethylpiperazine, N, -methyl, N '-(2-dimethylamino) -ethylpiperazine, N-methylmorpholine, N (N'- (Dimethylaminoethyl) -morpholine, 1,2-dimethylimidazole, dimethylaminoethanol, dimethylaminoethoxyethanol, N, N, N'-trimethylaminoethyl-ethanol, N-methyl-N '-(2hydroxyethyl) -ethanol Amine, N-methyl-N '-(2-hydroxyethyl) -piperazine, N- (2-hydroxyethyl) morpholine, bis (2
-Amine catalysts such as dimethylaminoethyl) ether and ethylene glycol bis (3-dimethyl) -aminopropyl ether, lead octenoate, lead octylate, dibutyltin dilaurate, dibutyltin mercaptide, dibutyltin thiocarboxylate, dibutyltin dimaleate And organometallic compounds such as dioctyltin mercaptide and dioctyltin thiocarboxylate, and calcium carbonate and sodium bicarbonate. Among these, it is preferable to use an organometallic compound because the reactivity of each component is excellent. The amount of these catalysts is preferably 0.001 to 10 parts by weight, more preferably 0.005 to 3 parts by weight, based on 100 parts by weight of the hydroxyl group-containing copolymer.
If the amount is less than 0.001 part by weight, it may take a long time to cure the composition, and if it exceeds 10 parts by weight, the weatherability of the obtained pavement may be reduced. . The method of compounding the catalyst is to first mix the catalyst with the component (A) or a mixture of this and a low molecular weight polyhydric alcohol, and then mix it with the component (B) to prevent the mutual reaction of the organic polyisocyanate. Is preferred because

The mixing ratio of the component (A) or the low molecular weight polyhydric alcohol and the component (B) in the composition of the present invention is preferably such that the ratio of the total amount of isocyanate groups to the total amount of hydroxyl groups is NC
O / OH = 0.5 to 2 (molar ratio) is preferable,
More preferably, it is 0.7 to 1.5. This ratio is 0.
If it is less than 5, the strength of the resulting pavement may not be sufficient, while if this ratio exceeds 2, the resulting pavement may be brittle.

The amount of the aggregate particles and the binder in the composition of the present invention may be determined in consideration of the shape of the aggregate particles, the physical properties of the obtained pavement, workability, and the like. The amount of the binder is preferably 5 to 50 parts by weight, more preferably 5 to 20 parts by weight with respect to parts by weight. If the amount is less than 5 parts by weight, the aggregate particles may not be sufficiently bonded to each other. On the other hand, if the amount exceeds 50 parts by weight, it is not economical and sticks to the rollers or irons at the time of construction. In some cases, the surface of the pavement may be easily slipped.

Other Compounds In addition to the above-mentioned components, coloring compositions such as phthalocyanine blue, phthalocyanine green, titanium oxide, carbon black, iron oxide, etc. And antifoaming agents such as acrylics, hydrolysis inhibitors such as carbodiimides, azodicarboxylates and fatty acid amides, phenols having steric hindrance, antioxidants such as aromatic diamines, benzotriazoles , Benzophenone-based and salicylic acid-based ultraviolet absorbers, silicon-based, acrylic-based, mineral-based antifoaming agents, and leveling agents. When these are blended, the proportion is preferably 100 parts by weight or less based on 100 parts by weight of the hydroxyl group-containing copolymer. When compounding these other components with the composition, first mix the other components with the component (A) or a mixture of this and a low molecular weight polyhydric alcohol, and then mix
Mixing with the component (B) is preferable because foaming of the composition due to the reaction between the water contained in the other components and the organic polyisocyanate can be prevented.

Method of Use The composition of the present invention comprises an aggregate particle, a component (A), a component (B) and a catalyst or an essential component comprising these and a low molecular weight polyhydric alcohol, if necessary, further containing a pigment and a filler. It can be manufactured by mixing with other components such as materials according to a conventional method before use. Among these production methods, a method of producing a binder containing a catalyst and then mixing the binder with aggregate particles is preferable because foaming does not occur during production. (A)
Dehydration of the component or a mixture of low molecular weight polyhydric alcohol with the catalyst and / or other components, if necessary, before blending with the component (B) organic polyisocyanate Is preferred. Performing the dehydration operation is preferable because foaming of the composition due to the reaction between the contained water and the organic polyisocyanate can be prevented. As a method of the dehydration operation, vacuum dehydration and the like can be mentioned. The obtained composition is applied on a base using a rake, a trowel, a compaction roller and the like. The construction thickness of the composition may be selected depending on the purpose, but is preferably about 10 to 50 mm.

Examples of the base to which the composition of the present invention can be applied include asphalt, concrete, mortar and the like. As the base, it is preferable to use a base whose surface is treated with a primer because the pavement has excellent adhesion. In this case, various primers can be used, and examples thereof include epoxy-based, urethane-based, and chlorinated olefin-based primers.

[0023]

EXAMPLES The present invention will be described in more detail with reference to Production Examples, Examples and Comparative Examples. In the following, parts and% are based on weight. Production Example 1 (Production of Hydroxyl-Containing Copolymer by Continuous High-Temperature Polymerization) A 6000 ml capacity pressurized stirred tank reactor equipped with an electric heater was filled with diethylene glycol monoethyl ether, the temperature was raised to 250 ° C, and the pressure was increased. The pressure was maintained at 25-27 kg / cm ² by gauge with a regulator. Then
Hydroxyl-containing (meta) while keeping reactor pressure constant
Monomer mixture consisting of 16 parts of 2-hydroxyethyl methacrylate and 20 parts of 2-hydroxyethyl acrylate as acrylate, 54 parts of 2-ethylhexyl acrylate as ethylenically unsaturated monomer and 10 parts of styrene
A-1 was fed at a constant feed rate (500 g / min, residence time: 1).
At 2 minutes), continuous supply from the raw material tank to the reactor was started, and a reactant corresponding to the supply amount of the monomer mixture A-1 was continuously extracted from the outlet. Immediately after the start of the reaction, after the reaction temperature once decreased, a rise in the temperature due to the heat of polymerization was recognized.
Held. The point in time at which the temperature became stable after the start of the supply of the monomer mixture A-1 was defined as the starting point of the withdrawal of the reaction solution.
As a result of continuing the reaction for 5 minutes, 17.5 kg of the monomer mixture A-1 was supplied, and 17.4 kg of the reaction mixture was recovered. The reactor was introduced into a thin film evaporator to separate volatile components such as unreacted monomers, and 15.5 kg of a concentrated solution (copolymer B-1)
I got According to gas chromatography, no unreacted monomer was present in the concentrated liquid. The number average molecular weight (hereinafter abbreviated as Mn) of the copolymer B-1 in which the molecular weight determined by GPC was 2,000 and the weight average molecular weight (hereinafter abbreviated as Mw) was 3 using tetrahydrofuran as a solvent and the molecular weight determined by GPC in terms of polystyrene. , 600 and the polydispersity index was 1.80. or,
The concentrated solution had a hydroxyl group concentration of 3.09 meq / g.

Production Example 2 (Production of a hydroxyl group-containing copolymer by solution polymerization) 10 parts of hydroxyethyl methacrylate and 20 parts of hydroxyethyl acrylate as the hydroxyl group-containing (meth) acrylate, and 2-ethylhexyl acrylate as the ethylenically unsaturated monomer 70 parts of a monomer mixture
A-2. In a four-necked flask equipped with a reflux condenser, a thermometer, a dropping funnel, a glass tube for nitrogen replacement and a stirrer: 15 parts of the monomer mixture A-2, 100 parts of methyl isobutyl ketone (hereinafter referred to as MIBK) and Charge 1 part of 2,2'-azoisobutyronitrile
At ℃, the polymerization reaction was started. After this, the monomer mixture
A polymerization reaction was carried out by continuously dropping 31 parts of a solution composed of 85 parts of A-2, 25 parts of MIBK and 6 parts of 2,2′-azobisisobutyronitrile over 6 hours. The solvent was distilled off from the obtained reaction solution under reduced pressure to obtain a copolymer B-2. The molecular weight of copolymer B-2 determined in the same manner as in Production Example 1 was Mn of 8,000.
0, Mw was 19,000, and the polydispersity was 2.2. The hydroxyl group concentration was 2.60 meq / g.

Example 1 100 parts of B-1 obtained in Production Example 1, 1 part of a polysiloxane-based defoamer BYK-066 (manufactured by Tetsutani Corporation), and di-n
0.01 part of butyltin dilaurate is added to the planetary mixer, stirred at room temperature for 15 minutes and subsequently
While kneading at a temperature of ° C., a dehydration operation was performed in vacuum for 1 hour to obtain a mixture C-1 which is a component (A) containing a catalyst.

Next, 100 parts (3.06 meq / g) of C-1 and (B)
Isocyanurate of hexamethylene diisocyanate (Sumidur N3500, NCO group content 5.
14 meq / g, manufactured by Sumitomo Bayer Urethane Co., Ltd.] 55
Parts (NCO / OH equivalent ratio 1.05) were added and sufficiently stirred to produce a binder, and 1240 parts by weight of sand having an average particle size of about 1 mm [aggregate particles / binder = 8/1 (weight ratio)] The mixture was added and mixed well to obtain a pavement composition. 10 on Teflon plate
Make a frame so as to have a thickness of mm, spread the above composition in this frame, flatten the surface with a metal roller, thickness 10 mm
Created a pavement. In addition, a 4 × 4 × 16 cm test piece was prepared using a mold for forming a metal mortar bar for a compression test.

The following evaluation was performed on the obtained test specimen and pavement. Table 1 shows the results.

Compressive strength Measured according to JIS K 6911 using a test specimen.

Water resistance The obtained pavement is immersed in warm water of 50 ° C. for 30 days,
The appearance change was observed.

Chemical resistance The obtained pavement is immersed in a 2% aqueous sodium hypochlorite solution for 30 days.
It was immersed for a day, and the appearance change was observed.

Discoloration resistance and durability The obtained pavement was treated at 63 ° C., 10 ° C. with a carbon arc sunshine weather meter manufactured by Suga Test Instruments Co., Ltd.
Tested for 00 hours. The change in appearance after the test was evaluated. In Table 1, ○, Δ, and × have the following meanings. Discoloration resistance: ○; no abnormality, Δ: partial discoloration, ×: discoloration Durability: ◎; no abnormality, ○: very slight surface peeling, Δ: slight surface peeling, ×: surface peeling

Example 2 A catalyst was contained in the same manner as in Example 1 except that 100 parts of B-1 obtained in Production Example 1 and 10 parts of 3-methyl-1,5-pentanediol were used. A) A mixture C-2 as a component was obtained. Next, using 100 parts (4.31 meq / g) of C-2, isocyanurate 8 of hexamethylene diisocyanate was used.
A composition was prepared in the same manner as in Example 1 except that 9.6 parts (NCO / OH equivalent ratio: 1.05) and 1517 parts of aggregate particles [aggregate particles / binder = 8/1 (weight ratio)] were used. Manufactured. Using the obtained composition, a thickness of 10 mm was obtained in the same manner as in Example 1.
Pavement and a test specimen for a compression test were prepared. The obtained pavement was evaluated in the same manner as in Example 1. Table 1 shows the results.

Example 3 Except that 100 parts of B-2 obtained in Production Example 2 was used,
In the same manner as in Example 1, a mixture C-3 as the component (A) containing the catalyst was obtained. Next, 100 parts (2.57 meq / g) of C-3, 54 parts of an isocyanurate of hexamethylene diisocyanate (NCO / OH equivalent ratio 1.05), 1232 parts of aggregate particles [aggregate particles / binder = 8/1 ( Weight ratio)] A composition was produced in the same manner as in Example 1 except that the composition was used. Using the obtained composition, a pavement having a thickness of 10 mm and a specimen for a compression test were produced in the same manner as in Example 1. The obtained pavement was evaluated in the same manner as in Example 1. Table 1 shows the results.

Example 4 A catalyst was contained in the same manner as in Example 1 except that 100 parts of B-2 obtained in Production Example 2 and 10 parts of 3-methyl-1,5-pentanediol were used. A) A mixture C-4 as a component was obtained.
Next, 100 parts (3.86 meq / g) of C-4, 89 parts of isocyanurate of hexamethylene diisocyanate (NCO / OH equivalent ratio: 1.05), 1512 parts of aggregate particles [aggregate particles / binder = 8/1 ( (Weight ratio)] was used in the same manner as in Example 1 except that the composition was produced. Using the obtained composition, a pavement having a thickness of 10 mm and a specimen for a compression test were produced in the same manner as in Example 1. About the obtained pavement,
Evaluation was performed in the same manner as in Example 1. Table 1 shows the results.

Comparative Example 1 A mixture of 100 parts by weight of bisphenol A diglycidyl ether (epoxy equivalent: 190 g / eq) and 30 parts of polypropylene glycol diglycidyl ether (epoxy equivalent: 340 g / eq) as an epoxy binder was modified aliphatic. Add 88 parts of polyamine to make a binder,
1744 parts of aggregate particles [aggregate particles / binder = 8/1
(Weight ratio)], and a pavement was manufactured in the same manner as in Example 1.

[0036]

[Table 1]

[0037]

EFFECT OF THE INVENTION The pavement composition and pavement of the present invention are
Since a specific acrylic urethane-based curing agent composition is used as a binder, it has excellent water resistance and chemical resistance, which is not found in a pavement using a conventional epoxy binder, and has durability and resistance. It is excellent in discoloration and the obtained cured product has sufficient strength as a pavement, so that it can be used for a wide range of pavement such as sidewalks, parks and poolsides.

Claims (5)

[Claims] 1. A pavement composition comprising aggregate particles, the following component (A), the following component (B), and a catalyst. (A) at least one kind of (meth) acrylate having at least one hydroxyl group and at least 5% by weight and at least one kind of monomer having an ethylenically unsaturated group other than the (meth) acrylate;
5% by weight or less and having a number average molecular weight of 1,000
0-20,000 copolymer (B) Non-yellowing organic (poly) isocyanate 2. The pavement composition according to claim 1, further comprising 1 to 50 parts by weight of a low molecular weight polyhydric alcohol per 100 parts by weight of the copolymer. 3. The copolymer of component (A) has a copolymer content of 170-3.
The pavement composition according to claim 1 or 2, which is obtained by continuous polymerization at a copolymerization temperature of 30 ° C. 4. A pavement comprising a cured product of the pavement composition according to claim 1, formed on a substrate. 5. The pavement according to claim 4, wherein a cured product thereof is formed on a substrate treated with the primer.