KR940005186B1 - Waterproof compositions - Google Patents

Abstract

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Description

Asphalt Emulsion Waterproofing Composition

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproofing composition of an asphalt emulsion type. More specifically, a spherical foam obtained by foaming polystyrene or a polystyrene derivative using an asphalt emulsion as a main binder (hereinafter referred to as polystyrene foam). ), A composition in which water, an HEC thickener, fine pulp and a preservative are mixed uniformly.

Conventional asphalt emulsion waterproofing material has a disadvantage in that it must be equipped with a certain equipment at the time of work mainly by melting by heating at high heat or diluted with an organic solvent. In addition, there was a problem such as the risk of fire during heating and the harm of the human body by inhalation of solvent vapor.

In recent years, there is a water-soluble type that has improved some of the above problems, but also has poor storage properties, there is a problem such as harmful water, such as cancer caused by asbestos as a water-soluble asphalt waterproofing material asbestos (Asbestos) to improve the operation.

Accordingly, an object of the present invention is to improve the above problems such as poor storage, poor work, complexity of work, hazards of the human body and the risk of fire, etc. To provide.

In order to achieve the object of the present invention, in the present invention, 85 to 90 wt% asphalt emulsion, 6.5 to 8.5 wt% water, 0.2 to 0.3 wt% HEC thickener, 0.2 to 0.25 wt% preservative, polystyrene or polystyrene foam 3.0 The mixture was uniformly prepared with a composition of -4.0 wt% and fine pulp 0.25-0.5 wt%.

The black brown to the asphalt-based emulsion is black when dried, the viscosity is 25000 ~ 35000cps (RVT 10rpm / Spindle No.6 / 25 ℃), pH is 5 ~ 6 (25 ℃), solid content 60 ~ 63wt%, specific gravity It is preferable to have physical property characteristics of 1.15-1.25. In the above range, when the content of the asphalt emulsion is more than 90wt%, the polystyrene content is relatively insufficient and causes a decrease in thermal insulation. At 85wt% or less, the amount of the foam increases, which leads to poor corrosiveness after drying and uneven coating during dissociation work. The phenomenon of dropping is shown.

In particular, the size selection of the styrene foam is also a very important factor, preferably 0.5 to 1.2 mm in diameter. If the particle diameter of the styrene foam is less than 0.5mm, the thermal insulation is lowered, and if it is more than 1.2mm, the phenomenon that the coating film becomes uneven due to the influence of the foam during the painting work occurs.

As said water, normal tap water or ion exchange water is preferable.

As the HEC thickener, US Union Carbide's company name Cellosive QP-30000H and the Hercules brand name Natrasol 250HR are preferred. There is a risk of sagging phenomenon below.

Examples of the preservative include Dowicil 75, a Dow Chemical company in the United States, and Metatin GT, manufactured by Ashima, Japan.

The polystyrene or polystyrene foam preferably has a density of 0.03 to 0.04 g / cm 3 and a particle diameter of 0.5 to 1.2 mm.

The fine pulp is preferably 0.8 to 1.2 mm in length, and more preferably, the brand name KC FLOCK of Hanyang KK, Japan.

The following examples illustrate the asphalt waterproofing composition of the present invention in more detail, but do not limit the scope of the present invention.

Example 1

After adding 82.5 Kg of ionized water (or tap water) to a fixed vessel, stirring with a low speed stirrer at 300 to 400 rpm, 2.5 kg of HEC thickener Natrasol 250HR (trade name of Hercules, USA) and the preservative Dowicil 75 (trade name of Dow Chemical, USA) 2.0 Kg was added thereto, and then dispersed and mixed for 20 to 30 minutes with a high speed stirrer at 1500 to 1800 rpm to obtain a transparent gel. While stirring the gel phase at low speed, 870 Kg of an asphalt emulsion (viscosity about 3000 cps, pH about 5, solid content 62%) was added and mixed uniformly. After that, 40 kg of fully styrene foam having a density of about 0.03 g / cm 3 and a particle diameter of about 0.1 mm and 3 kg of fine pulp (trade name: KC FLOCK: size 0.8 to 1.2 mm) were added thereto, followed by mixing with a kneader and mixing with an asphalt emulsion. Waterproof material was prepared.

In order to measure the physical properties of the sample, the sample was coated on a brick substrate with a thickness of 2 mm, and then dried for 7 days at 25 ° C./RH 65% for 7 days, and then a glass tube having a diameter of 5 mm and a length of 30 mm was placed on a dry surface of silicon. The sealant was dried for 2 days after corrosion to prevent leakage of water. Then, after filling the water up to 250mm, the top was blocked and then prevented for 7 days to measure the water resistance to the height of the water decrease after that is described in Table 1 below. In addition, 10mm thick, 300 × 300mm coated on a well-released panel and then completely dried for 10 days or more, and tested according to KSL9016 to measure the thermal conductivity is shown in Table 1 below. After the impact resistance was coated with a wall thickness of 2mm and the sample was dried for 7 days at 25 ° C./RH65%, it was confirmed by using a Gardner impact tester to determine whether the coating film was released at the time of impact at 60 Lb / in 2.

Example 2

In this experiment, it was prepared in the same manner as in Example 1, except that 67 Kg of ion-exchanged water, 2.5 Kg of HEC thickener, 2.0 Kg of preservative, 895 Kg of asphalt emulsion, 31 Kg of polystyrene foam, and 2.5 Kg of fine pulp were used. The physical properties were also measured in the same manner as described above and listed in Table 1 below.

Comparative Example 1

Asphalt emulsion products for waterproofing materials of Korea Petroleum Co., Ltd. was carried out in the same manner as the above measurement method, and the results are shown in Table 1 below.

TABLE 1

As a result of the comparison of the physical properties, it was found that the asphalt emulsion waterproofing material composition of the present invention was excellent in thermal insulation. In addition, it is easy to paint with uniform thickness during painting work, so it is water soluble and there is no risk of fire, and it has excellent puffiness on the surface of porous material.

Excellent toughness, excellent crack prevention effect, no harmful components to the human body, easy to prepare equipment, easy to carry and light, there are advantages of easy transportation.

Claims (3)

Asphalt emulsion, the main component, 86.5 ~ 89.8wt%, water 6.5 ~ 8.5wt%, HEC thickener 0.2 ~ 0.3wt%, preservative 0.2 ~ 0.25wt%, polystyrene or polystyrene foam 3.0 ~ 4.0wt% and fine 0.25 ~ 0.5wt% Asphalt emulsion waterproofing material composition, characterized in that mixed in the composition. The asphalt emulsion waterproofing composition according to claim 1, wherein the polystyrene or the polystyrene foam has a particle diameter of 0.5 to 1.2 mm. The asphalt emulsion waterproofing composition according to claim 1, wherein the fine pulp has a length of 0.8 to 1.5 mm.