KR100247470B1 - Water-proofing material containing chloroprene rubber and manufacturing method thereof - Google Patents

Abstract

In the present invention, toluene and asphalt are added to chloroprene rubber and stirred to a certain viscosity to prepare a chloroprene rubber solution, and then silica, alkylphenol resin, thermoplastic phenol resin, zincated, magnesium oxide and antioxidant are mixed and stirred to add liquid. The present invention relates to a coating waterproofing material comprising chloroprene rubber prepared by stirring and slowly adding glass fiber chips to the coating waterproofing material, which is applied to concrete top plate, steel top plate, rooftop, parking lot, and civil engineering structure for excellent tensile strength, It has low temperature flexibility, impact resistance, adhesiveness, chemical resistance and abrasion resistance, so it shows strong resistance to cracks in concrete structures, impacts on rapid or rash of vehicles, high heat and harmful chemicals when constructing asphalt concrete Can be.

Description

Coating waterproofing material mainly containing chloroprene rubber and its manufacturing method

The present invention relates to a coating film waterproofing material having a chloroprene rubber as a main component and a method for manufacturing the same, and more particularly, containing chloroprene rubber as a main component and adding asphalt, a crosslinking agent, an antioxidant and a glass fiber chip to the bridge top plate. The present invention relates to a coating waterproofing material and a method of manufacturing the same that prevent economic leakage and corrosion of reinforcing bars and corrosion and deterioration of bridges.

When the vehicle passes over the bridge's bottom plate, bending moments or vibrations are generated on the top plate due to the impact or load of the tire, causing peeling and cracking.

In addition, rainwater causes cracks and cracks in the pavement, penetrates through the sideways, and corrodes the reinforcing steel to promote the cracking of concrete, and cracks on the concrete floorboard affect the asphalt concrete pavement, causing pavement destruction. .

Generally, waterproof materials used as protection systems of civil structures such as bridge surfaces include sheet type waterproofing materials, coating type waterproofing materials, and penetration type waterproofing materials.

Among them, the construction method using the penetration type waterproofing material is a method used in the past for the waterproofing construction of bridge decks, and is mainly a method of dissolving silicon with a strong solvent and using it as a liquid penetration waterproofing agent.

However, the construction method using the penetration type waterproofing material has a low resistance to cracking and does not penetrate into the high strength concrete of 350kgf / cm 2 and has not been used recently.

In addition, although the sheet type waterproof construction exhibits a uniform and excellent waterproofing effect, the surface is not uniform due to high cost and difficult connection work between sheets in the construction process, and the waterproof function may be lost due to leakage of the connection part. .

On the other hand, the coating type waterproof construction is possible for continuous construction without connecting parts, and it is excellent in terms of effect, but it has low resistance to cracking of concrete, damage of waterproof layer due to high temperature when paving ascon, and weak adhesive force. It had the disadvantage that the waterproof performance was lost at the interface between the concrete concrete plate and the asphalt concrete pavement.

The object of the present invention is to use the chloroprene rubber as an elastomer as a main material to form a coating film during construction, crosslinking occurs by the heat during packaging ascon packaging, thereby improving the physical properties, reactivating the ascon layer, waterproof layer and top plate as a single layer The present invention provides a new film waterproofing material which is formed, has excellent impact resistance against sudden stopping of a vehicle and oscillation, and has a trackability against cracks in the upper plate.

Another object of the present invention to provide a method for producing a coating film waterproofing material as described above.

The coating film waterproofing material of the present invention for achieving the above object is 100 parts by weight of chloroprene rubber, 200 to 400 parts by weight of toluene, 20 to 50 parts by weight of asphalt, 30 to 50 parts by weight of silica, 10 to 20 parts by weight of alkylphenol resin, It is characterized by consisting of 5 to 10 parts by weight of thermoplastic phenol resin, 5 to 10 parts by weight of zinc, 5 to 10 parts by weight of magnesium oxide, 1 to 3 parts by weight of antioxidant and 20 to 40 parts by weight of glass fiber chips.

The method for preparing a coating waterproofing material is a step of preparing a chloroprene rubber solution by adding 200 to 400 parts by weight of toluene and 20 to 50 parts by weight of asphalt to 100 parts by weight of chloroprene rubber and stirring at 20 to 50 ℃ for 1 to 3 hours, 30 to 50 parts by weight of silica, 10 to 20 parts by weight of alkylphenol resin, 5 to 10 parts by weight of thermoplastic phenol resin, 5 to 10 parts by weight of zinc, 5 to 10 parts by weight of magnesium oxide, and 1 to 3 antioxidants in the chloroprene rubber solution. Mixing the parts by weight and stirring at 20 to 50 ° C. for 1 to 2 hours to prepare a liquid coating waterproofing material, and a rotational speed of 100 to 300 rpm while slowly adding 20 to 40 parts by weight of glass fiber chips to the liquid coating waterproofing material. After stirring for 1 to 3 hours, it is characterized by consisting of a step of mixing.

The present invention will be described in more detail as follows.

Since the coating waterproofing material of the present invention contains chloroprene rubber as a main component, the chloroprene rubber generally has excellent characteristics of weather resistance, ozone resistance, heat resistance, chemical resistance, and aging resistance, and is used as a coating waterproofing material for bridges and civil engineering structures. It is preferable to.

In preparing a coating waterproof material using such chloroprene rubber as a main component, first, chloroprene rubber and asphalt are added to toluene and stirred until the viscosity reaches 3000 to 5000 cps, and then passed through a trigonal mixer to prepare a uniform rubber solution. .

At this time, it is preferable that the usage-amount of toluene is 200-400 weight part with respect to 100 weight part of chloroprene rubber, and the usage-amount of asphalt is 20-50 weight part.

Asphalt is added for the purpose of strengthening the water resistance and adhesiveness of the coating waterproofing material, it is preferable to use an unfavorable asphalt rather than the general paving asphalt.

Asphalt-rich asphalt has a high elasticity by causing a reaction such as polymerization or condensation with air, and has a higher asphaltene content and a lower content of petroleum than general asphalt, which is not only large in heat resistance and plasticity but also strong in impact resistance.

Asphalt asphalt used in the present invention is used as a asphalt asphalt having a penetration degree of 0 to 5, 5 to 10 and 10 to 20.

If the amount of such asphalt used is less than 20 parts by weight based on 100 parts by weight of chloroprene rubber, water resistance and adhesiveness are lowered, and if the amount is more than 50 parts by weight, the viscosity is increased, making it difficult to manufacture as well as impact resistance and heat resistance.

In addition, when the amount of toluene used is out of the above range, there is a problem in that the solid content is reduced to form a constant coating film thickness.

Stirring with the addition of chloroprene rubber, toluene and asphalt results in the presence of undissolved rubber particles when the viscosity is less than 3000 cps, and when the viscosity is over 5000 cps, the viscosity is too high for additive mixing in subsequent processes.

A chloroprene rubber solution is prepared according to the method described above, followed by mixing silica, alkylphenol resin, thermoplastic phenol resin, zincation, magnesium oxide and antioxidant, and stirring at 20-50 ° C. for 1 to 2 hours to form a liquid coating waterproofing material. Get

In this case, the amount of silica used is 30 to 50 parts by weight based on 100 parts by weight of chloroprene rubber, the amount of alkylphenol resin is 10 to 20 parts by weight, the thermoplastic phenol resin is 5 to 10 parts by weight, the zincation is 5 to 10 parts by weight, Magnesium oxide is added to 5 to 10 parts by weight, and antioxidant is added to 1 to 3 parts by weight.

Here, silica is a reinforcing filler, and generally, carbon black, silica, and the like may be used as the reinforcing filler. In the present invention, silica powder of 38 to 52 mu effective for polar rubber such as chloroprene rubber is used.

Alkylphenol resins and thermoplastic phenolic resins act as a reinforcing agent for chemical resistance and wear resistance at high temperatures. Specific examples of alkylphenolic resins include butyl phenol resin or isobutyl phenolic resin, and specific examples of thermoplastic phenolic resins include phenolic alcohol resin. Or formaldehyde phenol resins.

If these contents are out of the above ranges, there is a problem that elongation and elastic force are lowered.

Zinc and magnesium oxide are crosslinking agents added to promote vulcanization. Magnesium oxide acts as a stabilizer at low temperatures but rapidly reacts with chloroprene rubber at high temperatures to form crosslinks. It is preferable that it is 5-10 weight part with respect to a part.

As the antioxidant, conventional ones can be used, and specific examples include amine-based, bisphenol-based, monophenol-based and sulfur-based antioxidants.

After preparing such a liquid coating waterproofing material, the coating film waterproofing material of the present invention is prepared by stirring for 1 to 3 hours at a rotational speed of 100 to 300 rpm while slowly adding 20 to 40 parts by weight of glass fiber chips thereto.

At this time, the glass fiber chip serves to reinforce the tensile strength, heat resistance, impact resistance and chemical resistance of the coating waterproofing material, and in general, the glass fiber chip can be used alkali-free glass, chemical glass or alkali glass. In the present invention, an alkali-free glass chip having a size of 5 to 12 mm is used.

If the size of the glass fiber chip is smaller than 5mm, the glass fiber chip is finely distributed in forming the coating film, so that the tensile strength is lowered, and the resistance to external impact is reduced. There is a fear that a problem that does not occur is generated.

In addition, when the glass fiber chip is added to the liquid film waterproofing material, if the speed thereof is too fast, there is a problem of agglomeration between the glass fiber chips, and if the stirring speed is out of the above range, there is a problem in the stability of the liquid film waterproofing material. .

When the coating waterproofing material composed mainly of chloroprene rubber is applied to concrete, steel, roof, parking lot and civil engineering structures using spray, rubber spatula and trowel, it has excellent tensile strength, low temperature flexibility, impact resistance, adhesiveness, Even if it is applied with 1 ~ 2mm thickness at one time, it shows strong resistance against crack of concrete structure, impact on sudden or rash of vehicle, high temperature when constructing ascon pavement, and harmful chemicals of civil engineering structure. Can be.

Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited by the Examples.

Example 1

To 100 parts by weight of chloroprene rubber was added 300 parts by weight of toluene and 30 parts by weight of fused asphalt (manufactured by Korea Petrochemical Co., Ltd.), and then dissolved by stirring for 1 to 3 hours until the viscosity reached 3000 to 5000 cps at 20 to 50 ° C. A uniform rubber solution was prepared by passing through a Trigonal mixer.

40 parts by weight of silica, 10 parts by weight of alkyl phenol resin (Aekyung Chemical Co., Ltd.), 5 parts by weight of thermoplastic phenol resin (KOLON Co., Ltd.), 7 parts by weight of zinc oxide, 9 parts by weight of magnesium oxide and antioxidant (Songwon Industry) Co., Ltd.) 3 parts by weight were mixed and stirred at 20 to 50 ° C. for 1 to 2 hours to prepare a liquid coating waterproofing material.

Chloroprene rubber coating waterproofing material was prepared by stirring and mixing for 1 hour to 3 hours at a rotational speed of 300 rpm while slowly adding 20 parts by weight of glass fiber chip (Kumkang Glass Co., Ltd.) to the liquid coating waterproofing material.

Example 2

The chloroprene rubber coating waterproofing material was prepared in the same manner as in Example 1, except that 30 parts by weight of glass fiber chips (Kumkang Glass Co., Ltd.) were slowly mixed with stirring at a rotational speed of 200 rpm.

Example 3

Chloroprene rubber coating waterproofing material was prepared in the same manner as in Example 1, except that 40 parts by weight of glass fiber chips (Kumkang Glass Co., Ltd.) were slowly mixed with stirring at a rotational speed of 100 rpm.

Experimental Example

The coating film waterproofing material prepared according to Examples 1 to 3 and commercially available products (S company products) were compared and measured for tensile strength, elongation rate, adhesion strength, air permeability, absorption rate, chemical resistance, drag impact resistance, and aggregate dent durability. The results are shown in Table 1 below.

Here, the tensile and bond strengths were measured according to the ASTM D 638-91 and ASTM D4541-89 method, the elongation was measured according to the ASTM D638-91 method, breathability ASTM E 96-93, water absorption ASTM D 570, And the chemical resistance was measured according to the ASTM D 543 method.

The drag impact was impacted 40 times at different locations with a 1.0 kg hammer head falling at a height of 200 mm. The head of the hammer is 20mm wide and has a tip of 90 °. A numerical record of the amount of damage suffered from a single impact is allowed if the average value of 40 total shocks is 3 or less.

The figures are 0 for damage, 1 for surface traces, 2 for minor indentations, 3 for severe indentations, 4 for perforation or partial penetration, and 4 for complete infiltration. Was denoted by 5.

On the other hand, the aggregate crushing durability test is a 150mm × 150mm samples loosely placed on a rigid non-elastic surface and then covered with 14 ~ 22mm broken gravel aggregate layer. A 5625 kg load was applied and held for 5 minutes. After 5 minutes, unload and inspect the specimen for damage and allow no osmotic water.

Example Commercial products One 2 3 Tensile Strength (MPa) 9.3 10.8 12.5 6.7 Elongation (%) 150 120 95 87 Adhesion Strength (MPa) 1.4 1.1 0.9 0.7 Breathability (g / ㎡ / 24 hours) 5.3 5.5 5.7 6.7 Absorption rate (%) 0.3 0.3 0.3 0.4 Chemical resistance Ethylene glycol No problem No problem No problem No problem Calcium chloride No problem No problem No problem Bad Gasoline No problem No problem No problem No problem Motor oil No problem No problem No problem No problem Sodium chloride No problem No problem No problem Bad Impact resistance One One One 4 Aggregate Permeability Durability No osmosis of water No osmosis of water No osmosis of water No osmosis of water

From the results of Table 1, it can be seen that the chloroprene rubber coating waterproofing material of the present invention has excellent tensile strength and elongation rate, and excellent breathability and chemical resistance as compared with the existing products.

As a result, the chloroprene rubber waterproofing material of the present invention may exhibit a strong resistance to cracking of the concrete structure, the reactivity and crosslinking occurs at a high temperature, so that the top plate, the pavement layer, and the waterproof layer are formed as a single layer, so that the waterproof performance does not decrease. In addition, it can be seen that it can be usefully used as a coating waterproofing material, such as roofs of construction structures and waste structures of civil structures.

As described in detail above, the coating waterproofing material prepared by adding asphalt, magnesium oxide, galvanized, silica and glass fiber chips to the chloroprene rubber according to the present invention has excellent tensile strength and elongation rate, and thus is resistant to cracks when applied to concrete structures. Resistant and crosslinking occurs at high temperature, so that the top plate, pavement layer and waterproof layer are formed as a single layer, so that the waterproof performance is not degraded, and it has excellent breathability and chemical resistance and so on. It can be usefully used as a coating waterproofing material.

Claims (5)

100 parts by weight of chloroprene rubber, 200 to 400 parts by weight of toluene, 20 to 50 parts by weight of asphalt, 30 to 50 parts by weight of silica, 10 to 20 parts by weight of alkylphenol resin, 5 to 10 parts by weight of thermoplastic phenol resin, 5 to 10 parts by weight of zinc A coating film waterproofing material mainly comprising chloroprene rubber composed of 5 to 10 parts by weight of magnesium oxide, 1 to 3 parts by weight of antioxidant, and 20 to 40 parts by weight of glass fiber chip. The coating film waterproofing material containing chloroprene rubber as a main component according to claim 1, wherein the asphalt is vulcanized asphalt having a penetration degree of 0 to 5, 5 to 10, and 10 to 20. The coating film waterproofing material of claim 1, wherein the glass fiber chip is an alkali-free glass chip having a size of 5 to 12 mm. Adding 200 to 400 parts by weight of toluene and 20 to 50 parts by weight of asphalt to 100 parts by weight of chloroprene rubber and stirring at 20 to 50 ° C. for 1 to 3 hours to prepare a chloroprene rubber solution, 30 to 50 parts by weight of silica, 10 to 20 parts by weight of alkylphenol resin, 5 to 10 parts by weight of thermoplastic phenol resin, 5 to 10 parts by weight of zinc, 5 to 10 parts by weight of magnesium oxide, and 1 to 3 parts by weight of antioxidant are mixed. Preparing a liquid coating waterproofing material by stirring and reacting at 20 to 50 ° C. for 1 to 2 hours, and A method for producing a coating waterproofing material comprising chloroprene rubber as a main component, comprising mixing 20 to 40 parts by weight of glass fiber chips to the liquid coating waterproofing material and stirring the mixture at a rotational speed of 100 to 300 rpm for 1 to 3 hours. The method of claim 4, wherein the preparation of the chloroprene rubber solution is performed by passing through a trigonal mixer after stirring to a viscosity of 3000 to 5000 cps.