KR101136955B1 - Composition for coating road pavement with quick drying characteristic - Google Patents

Abstract

PURPOSE: A quick-drying coating composition for road pavement is provided to have excellent impact resistance and crack resistance without reducing quick hardening properties, not to decrease water permeability by quickening surface hardening, and to have excellent surface protection performance and long lifetime. CONSTITUTION: A quick-drying coating composition for road pavement comprises: 60-70 weight% of a base component, in which methyl methacrylate monomer, 2-ethyl hexyl acrylate monomer, butyl acrylate monomer, paraffin wax, dimethyl-para-toluidine, and methyl methacrylate polymer with n-butyl methacrylate and methacrylic acid and 2-methyl-2-propenoic acid copolymer containing 2-metyl-2-propenoic acid are graft-polymerized; 15-20 weight% of a first component consisting of hallow ceramic microspheres, borosilicate glass, isocyanate, and polyester polyol; and 15-20 weight% of a second component consisting of high impact polystyrene, sodium aluminate, polyputty and polyvinyl alcohol fiber.

Description

Quick-drying coating composition for road application {COMPOSITION FOR COATING ROAD PAVEMENT WITH QUICK DRYING CHARACTERISTIC}

The present invention relates to the improvement of the coating composition applied to the road surface of the pavement, in particular, it is possible to quickly cure at the time of application and there is no stickiness after curing, foreign matter does not get in the passage of the vehicle, reactive two-component type, easy to apply on-site, above all The present invention relates to a fast-drying coating composition for road application excellent in durability, impact resistance, crack resistance (crack resistance) and water permeability.

As is well known, among the various causes of traffic accidents, the friction of road surface is a very important factor in evaluating road safety as a factor directly or indirectly affecting traffic safety.

For example, in the case of highways, traffic accidents caused by sliding of roads occur on an average of 1,000 or more every year, and are increasing every year.

In order to solve such a problem, a method of improving the material, such as improving the packaging material composition itself or to further include a binder to enhance the anti-slip function, and by structurally improving the surface of the road surface The method of strengthening a slip prevention function, etc. are mentioned.

Examples of the former include Patent No. 062145 'Anti-slip paving adhesive composition and an anti-slip mixture using the same', and Patent Publication No. 2009-0023046 'Road paving binder composition, road paving primer composition and anti-slip paving mixture' have.

They have a long time until the practical strength of ordinary epoxy resins are developed, which delays traffic opening time, poor weather resistance, and at a high temperature, the retention of aggregates decreases, resulting in peeling and peeling, resulting in durability. Due to the property of low flexibility and low temperature, the epoxy resin is mainly used to solve the problem of falling down in the cold districts, especially in the regions with snow, without falling under excessive conditions caused by snow removal vehicles. .

In this case, however, the disclosure patent further includes aggregate, but also includes a portion of the aggregate exposed to the road surface to have a structural anti-slip function.

However, the improvement of such a packaging material composition itself has a disadvantage in that the economical efficiency in terms of quantity because of a large amount of coating, the initial development costs also increase in terms of research and development related to quick drying.

An example of the latter is a groove (groove) structure disclosed in Japanese Patent Application Laid-Open Publication No. 2005-0047225, 'Anti-dust coating grooving method of the road surface and its coating device'.

In other words, grooves are formed in some sections of the paved road surface at regular intervals in the longitudinal or transverse direction of the road to increase the friction resistance of the driving vehicle wheels, thereby preventing slip, shortening the braking distance, and preventing overspeed. That's it.

At this time, a coating agent is applied to the surface of the road surface on which the groove is formed to protect the road surface and improve durability.

In this case, it is natural that the coating agent is applied to the surface of the road surface without grooves.

This latter example is preferred because of its simple structure, low cost, and short construction period.

However, since the conventional coating agent applied to the surface of the road surface is a composition produced by a radical polymerization reaction, it is difficult to work in the field, and it is a form that is applied by returning to the site after reacting by applying heat at the factory. There was a disadvantage in that the work is cumbersome and the work efficiency is reduced according to the application.

As an improved example of this, Korean Patent Laid-Open Publication No. 2008-0061421 discloses 'acryl-based syrup and its preparation method', and accordingly, methyl methacrylate, 2-ethylnuclear acrylate, butyl acrylate, parapic wax, N-dimethyl It could be confirmed that acrylic syrup was prepared to enable rapid curing at the time of application through a combination of ingredients such as paratoluidine and to prevent foreign matters from passing through the vehicle due to adhesiveness after curing, and to be easily reacted to the field due to the reactive two-component type.

However, due to the characteristics that such a syrup or coating is applied to the road surface, durability, crack resistance (impact resistance), impact resistance, etc. are excellent for long life. There is a growing demand for coating compositions that can be further implemented, but there is a limitation that the configurations shown in the disclosed Patent Publication No. 2008-0061421 do not adequately meet these requirements.

The present invention was created in view of the above-mentioned problems in the prior art as described above, and unlike the conventional coating agent prepared by radical polymerization reaction, by improving the composition, it is possible to quickly cure the graft-polymerized coating agent using a curing agent. It is possible to work on-site, improve quick-drying, shorten working time and increase work efficiency while maintaining excellent adhesion.In addition, durability, impact resistance, and crack resistance (crack resistance) And a main purpose of providing a quick-drying coating composition for applying a road surface to further improve water permeability.

The present invention as a means for achieving the above object, as a quick-drying coating composition for the surface coating, MMA (methyl metha acrylate monomer) 38-42% by weight, 2-EHAM (2-ethyl hexyl acrylate monomer) 18-22% by weight , 6-10% by weight of butyl acrylate monomer (BAM), 0.8-1.2% by weight of Paraffin wax, 0.8-1.2% by weight of Dimethyl-para-Toluidine and the remaining butyl 2-methyl-2-propenic acid and 2-methyl-2-prop 60-70% by weight of the base component to which 2-methyl-2-propenoic acid containing phenic acid is graft polymerized; 20-20% by weight hollow ceramic microspheres, 15-25% by weight borosilicate glass, 10-15% by weight isocyanate and 15-20% by weight of the first component consisting of the remaining polyester polyol; And, 15-20% by weight of the second component consisting of 35-45% by weight of high impact polystyrene, 12-18% by weight of sodium aluminate, 8-12% by weight of polystyrene, and the remaining polyvinyl alcohol (PVA) fibers. It provides a fast-drying coating composition for road application characterized in that the composition.

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According to the present invention, it can be applied while maintaining quick-drying even at 20 degrees below zero using monomers without using water or a solvent, and by adding paraffin wax to block oxygen in the air, Tacky can be used for short-term curing. There is no advantage that foreign matter does not adhere to the wheel when the vehicle passes, and because of excellent adhesiveness and quick-drying, it is possible to obtain the effect of improving the waterproofness and durability.

In addition, the present invention is to strengthen the impact strength, but is resistant to cracks and cracks without impairing fastness, and promotes surface hardening and does not inhibit the permeability, it is excellent in surface protection and expression as a surface coating agent, achieving long life The effect can also be obtained.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments.

The quick-drying coating composition for the road surface coating according to the present invention is prepared by a graft polymerization method, unlike the conventional method.

Here, the graft polymerization refers to a hybrid polymerization reaction in which a straight chain polymer is used as a stem and bonds different kinds of polymers as if the branches are stretched. Means.

In addition, the present invention is characterized in that it has a two-component quick-drying, the method for applying to maintain the quick-drying when applying the coating composition prepared by the polymerization method also has a feature, in which the coating composition in a short time In order to cure, a certain amount of Benzoyl peroxide is added, and through this, an exothermic reaction is induced so as to be applied while maintaining fast drying.

In other words, it has a reactive two-part coating method in which a specific amount of peroxide is added to induce heat generation.

In this case, the two-component type means that the drying, that is, curing occurs only when a specific amount of the curing agent is mixed with the subject. In the present invention, for example, the coating composition is the subject, and the peroxide becomes the curing agent.

Next, the quick-drying coating composition according to the present invention will be described.

The quick-drying coating composition according to the present invention is made by mixing 60 to 70% by weight of the basic component of the polymer, 15 to 20% by weight of the first component and 15 to 20% by weight of the second component.

In this case, the basic component is a polymer, 38-42% by weight of methyl metha acrylate monomer (MMA), 18-22% by weight of 2-ethyl hexyl acrylate monomer (2-EHAM), 6-10% by weight of butyl acrylate monomer (BAM) , Paraffin wax 0.8-1.2 wt%, Dimethyl-para-Toluidine 0.8-1.2 wt% and the remaining butyl 2-methyl-2-propenic acid with n-butyl methacrylate and methacrylic acid and 2-methyl-2- It consists of a 2-methyl-2-propenic acid polymer containing propenoic acid.

In this case, the basic component is formed by a graft polymerization method, wherein the backbone polymer is a 2-methyl-2-propenic acid polymer containing butyl 2-methyl-2-propenic acid and 2-methyl-2-propenic acid. And any polymer branch is considered to be the remaining components.

Here, MMA, 2-EHAM, and BAM, which are acrylic monomers constituting the monomer, are added to reinforce the adhesive strength, and when MMA is added below 38% by weight, the strength is weakened, and the wear resistance and durability rapidly decrease, and 42% by weight. If it is added in excess of the above, it should be added in the above range because 2-EHAM is added in less than 18% by weight, and if it is added in excess of 22% by weight, the tacky (sticky) becomes severe. It should be added in the range, the BAM should be added in the above range because cracks are severely generated when added to less than 6% by weight, and tacky occurs when added to more than 10% by weight.

In addition, paraffin wax is added to block the ingress of oxygen into the air and to prevent stickiness, that is, tacky.

When the paraffin wax is added at less than 0.8% by weight, the effect of blocking oxygen inflow into the air is poor, and the quick drying property is not badly improved, and there is no tacky improvement effect. Since foreign matters may be caused afterwards, it should be limited to the above range.

In addition, the Dimethyl-para-Toluidine should also be added in the range of 0.8 to 1.2% by weight, which is a curing accelerator added to promote curing, and if it is out of the range, the desired physical properties (mechanical or mechanical) may occur. Strength, durability, etc.) cannot be obtained and should be limited to the above range.

Finally, 2-methyl-2-propenic acid polymers containing methyl methacrylate polymer with n-butyl methacrylate and methacrylic acid and 2-methyl-2-propenic acid are all subject to It becomes the seed of the reaction and serves to improve the adhesion.

On the other hand, the first component for the feature expression is added to improve the adhesiveness, durability and crack resistance, 15 to 20% by weight is added to the above-mentioned basic component.

At this time, the first component is made of 20-40% by weight hollow ceramic microspheres, 15-25% by weight borosilicate glass, 10-15% by weight isocyanate and the remaining polyester polyol.

Here, the hollow ceramic microspheres have an excellent reflective thermal insulation function due to the hollow body structure, and are added to prevent heat island phenomenon due to radiation heat reflection and to improve durability.

Such hollow ceramic microspheres are suitable in terms of micron ceramic balls, and are very important additives to form pores when combined with the back cement to improve water permeability.

When the hollow ceramic microspheres are added in an amount of less than 20% by weight, the water permeability is sharply lowered, and when the content of the hollow ceramic microspheres is added in an amount of more than 40% by weight, the water-retaining property is not only poor, but the manufacturing cost is rapidly increased.

In addition, borosilicate glass is composed of 80% by weight of silicic acid powder, the remaining boric acid powder and other unavoidable components, and is added to reinforce crack prevention.

That is, the borosilicate glass has excellent thermal shock resistance, chemical durability, and low thermal expansion rate, so that thermal expansion and shrinkage are small, thereby suppressing crack generation.

In this case, when the borosilicate glass is added in less than 15% by weight, the crack prevention effect is lowered, and when it is added in excess of 25% by weight, the crack prevention effect is excellent, but the permeability is sharply lowered, so the water permeability is sharply limited. .

In addition, isocyanate is added to react with the polyol to form unsaturated polyurethane bonds to improve adhesion.

That is, the isocyanate improves the adhesion between the components, for example, by inducing a urethane bond with the alcohol of the polyol by the following reaction formula.

R-NCO (isocyanate) + HO-R '(alcohol) → R-NHCO-O-R' (Urethane)

To this end, in the present invention, it is preferable to add 10 to 15% by weight, but when added below 10% by weight, the reactivity with the polyester polyol is lowered, and the adhesiveness is lowered. When the content exceeds 15% by weight, the reactivity is rapidly activated. It is preferable to limit the fluidity while being limited to the above range.

Finally, polyester polyol is added to improve the flowability and flowability of the coating agent of the present invention to induce a urethane reaction.

In this case, the polyester polyol is obtained together with the production of an ester group by the polymerization of diol and diacid, which is a kind of alcohol having two hydroxyl groups in a molecule.

On the other hand, the second component for expressing characteristics is a component added for quick drying (fastening), impact strength enhancement, surface hardening and crack prevention, and water permeability improvement, 15 to 20% by weight to the above-mentioned basic components Is added.

At this time, the second component is made of 35-45% by weight of high impact polystyrene, 12-18% by weight of sodium aluminate, 8-12% by weight of poly putty and the remaining polyvinyl alcohol (PVA) fibers.

Here, high impact polystyrene (PS) is a kind of polystyrene (PS), which is added in the form of granules to reinforce the impact strength, and when it is added below 35% by weight, the impact strength drops, and when it exceeds 45% by weight, the voids The fluidity is increased, but the durability is poor, and it is weak to cracks and cracks, so it should be limited to the above range.

In addition, sodium aluminate (Sodium Aluminate) is a representative aluminum-based liquid fastener, commonly used as a coagulation agent (Coagulation Agent), in particular in the present invention is added to assist the polyperiphery for promoting the curing, the amount of the polypere In view of this, a little more than this is usually added, but when it is added less than 12% by weight, the cohesive force is lowered, so that the fastening efficiency is low, and when it exceeds 18% by weight, it is preferable to limit the fluidity due to excessive aggregation. .

In addition, poly putty is used to promote surface hardening and to prevent surface cracking. The poly putty is generally made to have a viscosity and hardness suitable for use by adding a curing agent or resin powder to a polyester resin. , Especially for surface hardening.

In the present invention, in order to strengthen the surface hardening in consideration of internal heat generation, when added to less than 8% by weight is a surface hardening effect is weak, when exceeding 12% by weight limited fluidity as well as fastness limited to the above range It is preferable to.

Finally, PVA (Polyvinyl alcohol) fibers are added to improve the permeability through the pore shape of the fiber at the same time as the binding function.

At this time, the PVA fiber is a hydrophilic material having an OH- group, and usually has physical and chemically superior adhesiveness, and has a tensile strength of 900 to 1600 MPa, and thus is suitable as a reinforcing material requiring tensile strength and alkali resistance.

In addition, since the heat of combustion is the lowest among synthetic fibers and there is no harmful gas in the combustion gas, it can be said that it is environmentally friendly.

In addition, an inorganic pigment may be further added in the range of 4 to 6 parts by weight based on 100 parts by weight of the coating composition (a mixture of the basic component and the first and second components) to realize color, and may also be used as a heat shielding pearl (Mica). ) May be further added in the range of 2-3 parts by weight.

The coating composition according to the present invention having such a composition is maintained in an applicable state by reaction with a benzoyl peroxide, which is a hardening agent added in the field, and is applied by the following method.

That is, the prepared basic ingredients are first put into a vibrating mixer, peroxide is added to induce heat generation, and when the exothermic state is induced while gradually stirring the vibrating mixer, the first component and the second component are added sequentially. After stirring sufficiently, it is good to apply in the form of apply | coating to a road surface.
At this time, the added peroxide is a substance that is obviously used for induction of heat in the art, but it is not necessary to limit the input amount in the present invention is preferably added in a ratio of 1-2 parts by weight based on 100 parts by weight of the coating composition. The other basic components and the first and second components may be made within the range of the above-described composition ratio.

As described above, the present invention can be applied using only a monomer without using water and a solvent, so that the coating operation can be sufficiently performed at 20 ° C. in consideration of the characteristics of the monomer.

In addition, due to the surface hardening acceleration and fastness of the poly putty and sodium aluminate, it is possible to induce rapid curing, it is possible to apply quickly.

In addition to the crack and crack prevention function of borosilicate glass and PVA fiber, long life can be achieved due to the improved durability through hollow ceramic microspheres.

Hereinafter, an Example is described.

[Example]

In order to confirm the characteristics of the coating agent according to the present invention, a test sample was prepared through the above-described component composition ratio and preparation method.

At this time, the prepared sample was a composition as shown in the invention materials 1, 2, 3 shown in Table 1.

In addition, the existing material to be compared is a component disclosed in the above-described Patent Publication No. 2008-0061421, and similar to the basic component of the present invention, the basic component of the present invention was adopted.

division Basic ingredients First ingredient Second ingredient Existing Material 100 - - Invention 1 60 20 20 Invention Material 2 70 15 15 Invention 3 64 18 18

At this time, the component compositions are all in weight percent.

Inventive materials 1, 2, and 3 were found to be safe, including the existing materials, which confirmed the elution of harmful substances for each sample having the composition shown in Table 1.

The hazardous substance dissolution test was conducted by the waste process test method set by the Ministry of Environment. The test items were checked for Pb, Cd, Cr ⁶⁺ , Cu, As, Hg and the measurement temperature was 24 ℃.

Through this, it was confirmed that both the existing material consisting of the basic components or the invention material according to the present invention satisfies all environmental regulatory requirements.

In addition, it was tested by other test methods in KS M 3006: 2003 and test methods in accordance with KS M 5000: 2009 to check durability and quick-drying (fastness), and to UV and heat to check for cracks or cracks. Samples were analyzed by light microscopy after exposure to harsh conditions (3 consecutive days).

In this case, the durability was measured for 7 days of age, the tensile strength (MPa) was measured, the existing material was 5.2, and the average of the invention materials 1,2,3 was 9.6 under the conditions of 20 ℃, under the conditions of 60 ℃ In the presence of 1.47, the average of the invention materials 1,2,3 was 2.68,

Therefore, it was confirmed that the durability of the invention materials 1,2,3 according to the present invention compared to the existing materials.

In addition, the quick-drying (fastness) was made in the form of measuring the drying time, that is, the curing time, in the case of the existing material it took 68 minutes to cure after coating, but the invention materials 1,2,3 according to the present invention The average time was 41.5 minutes.

Through this, it was confirmed that the coating material according to the present invention has fast drying properties.

Finally, each of the samples after the quick-drying test was placed under an ultraviolet lamp and irradiated with ultraviolet rays, and at the same time, when the heat was continuously applied at 40 ° C. for 3 days, it was checked whether cracks or cracks were on the surface.

As a result, the microcracks and cracks were confirmed in the case of the existing materials, but no cracks and cracks were found in the inventive materials 1,2 and 3 according to the present invention.

As a result, the efficacy, durability and long life of the coating agent according to the present invention were sufficiently confirmed.

Claims (3)

As a quick-drying coating composition for road application,
MMA (methyl metha acrylate monomer) 38-42 wt%, 2-EHAM (2-ethyl hexyl acrylate monomer) 18-22 wt%, BAM (butyl acrylate monomer) 6-10 wt%, Paraffin wax 0.8-1.2 wt%, Dimethyl-para-Toluidine 0.8-1.2% by weight and the remaining 2-methyl- containing methyl methacrylate polymer with n-butyl methacrylate and methacrylic acid and 2-methyl-2-propenic acid 60-70% by weight of the base component to which 2-propene acid is graft polymerized;
20-20% by weight hollow ceramic microspheres, 15-25% by weight borosilicate glass, 10-15% by weight isocyanate and 15-20% by weight of the first component consisting of the remaining polyester polyol; And,
High Impact Polystyrene 35-45% by weight, 12-18% by weight sodium aluminate, 8-12% by weight polypropylene and 15-20% by weight of the second component consisting of the remaining polyvinyl alcohol (PVA) fibers Fast-drying coating composition for road application, characterized in that. delete delete