JP2691880B2 - Manufacturing method of roofing material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an asphalt-based roofing material to be attached to the surface of a roof or roof of a building or the like.

[0002]

2. Description of the Related Art Asphalt-based roofing materials applied to the surface of roofs or roofs of buildings and the like are shown in FIG. , The asphalt 2 is impregnated and applied to form the roofing base material 3. On one surface of the roofing base material 3, a large number of fine grained granules 4 are dropped from the hopper 5 onto the surface of the asphalt 2 to be diffused, Pressure is applied from above and below between the pressure bonding rolls 6, 6 to disperse and attach the fine granules 4 to the surface of the asphalt 2, as shown in FIG.
It forms a roofing material.

As described above, the asphalt-based roofing material is manufactured by using the asphalt 2 as a base material as a waterproof material layer and diffusing the fine grained granules 4 onto the surface of the asphalt 2. The adhesion of the fine granular mince particles 4 on the surface in this way prevents the asphalt 2 and the asphalt 2 from sticking to each other when the roofing material product is wound up. In addition, when the roofing material is attached to a roof or the like, it is directly exposed to the natural environment, so that the asphalt surface is prevented from being deteriorated by ultraviolet rays, freezing and the like.

However, the conventional roofing material has the following problems.

As shown in FIG. 3, fine dust particles 8 adhere to the surface of the fine-grained mince particles 4 even after cleaning. Therefore, during production, the fine particle dust 8 was adhered. If it is diffused and adhered to the surface of the asphalt 2 as it is, the adhesion with the asphalt 2 will be deteriorated, and the mince particles 4 will be peeled from the asphalt 2 to cause defective products.

The fine particles 8 adhered to the fine-grained mince particles 4 even after cleaning. The fine particle dust 8 is generated when the mince particles 4 fall on the surface of the asphalt 2 and diffuse, and the working environment is deteriorated. Therefore, it is necessary to install a dust collector to improve the environment. A huge amount of equipment and maintenance costs such as dust collectors are required, which causes the roofing materials to soar.

The fine granules 4 that are diffused and adhered to the surface of the asphalt 2 are closely attached to each other, and the oil content of the asphalt 2 causes a capillary phenomenon or the like to cause the hue of the granules 4 to vary, resulting in a stable constant color. Interfere with the manufacture of the product.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and prevents the generation of fine particles of dust adhering to the surface of a fine-grained mining grain, It is an object of the present invention to improve the environment and provide a method for producing a high-quality roofing material.

[0009]

The method for producing a roofing material of the present invention comprises: 90 to 10% by weight of water;
~ 90 wt% of a coating material liquid mainly composed of a water-soluble acrylic resin, and a weight ratio of 0.1 to 10 wt% of the coating material liquid to the fine granular mince particles. In addition to the step of kneading, the step of drying the kneaded minced granules with warm air at 100 to 180 ° C., and the step of forming a resin film on the surface of the minced granules by cooling at room temperature after the drying. And a step of diffusing and embedding the resin-coated mince granules on the surface of flexible asphalt.

The fine granules coated with the coating material liquid used in the present invention are prepared by crushing the granules composed of crushed rock and sand to a particle diameter of about 1 to 2 mm. It is granulated. The fine granule granules thus obtained are kneaded with a coating material liquid mainly composed of a water-soluble acrylic resin liquid to form a thin layer film on the surface to cover the entire surface of the granule granules. This suppresses the generation of fine particle dust. Further, the coating material liquid may be mixed with a colored coating material in an appropriate ratio to color the surface coating of each of the mince particles.

Mineral granules as a raw material of the present invention include silica sand, silica-based silica stones such as silica, limestone and dolomite metamorphic rocks such as marble, granite, granite, andesite, sandstone, tuff. As mentioned above, rocks made of quartz, feldspar, mica, etc. can be preferably used, and they are crushed to an appropriate particle size before use. Also, in addition to such a mince grain,
It is also possible to use glass particles or slag generated during smelting of non-ferrous metals.

Further, in the manufacturing method of the present invention, a fine-grained mince granule having a predetermined particle size is kneaded with a coating material liquid mainly composed of a water-soluble acrylic resin liquid at a constant ratio.

In the manufacturing method of the present invention, the coating material liquid is a water-soluble acrylic resin liquid containing 90 to 10% by weight of water and 10 to 90% by weight of acrylic resin. Preferably water 70
-30% by weight and acrylic resin 30-70% by weight, more preferably 50% by weight water and 50% by weight acrylic resin.

As the coating material liquid, synthetic resins such as acrylic resin, oily resins, heavy oils and fats, pastes such as CMC, silicone resins, rubber derivatives such as chlorinated rubber and the like can be used.

Further, in the present invention, the mixing ratio of the coating material liquid and the fine granular minced granules is 0.1 to 10% by weight based on the weight of the fine granular granular granules. Add to the granules and knead. Preferably, 1 to 5% by weight is suitable. If the content is 0.1% by weight or less, the coating material liquid does not sufficiently cover the minced granules 4. On the other hand, if it exceeds 10% by weight, the coating becomes too thick and wasteful.

100 to 18 kneaded fine-grained minced granules
Dry with warm air in a dryer to a temperature of 0 ° C. Preferably, 1
A temperature of 00 to 150 ° C is suitable. After drying, the resin film is formed by cooling at room temperature, and the particle size of the resin-coated fine granules is adjusted to 1 to 2 mm with a sieve. Hot air drying temperature is 10
If the temperature is 0 ° C or lower, the drying is insufficient. On the other hand, if the temperature exceeds 180 ° C, the product will be overly dried.

[0017] The fine-grained minced granules of which the grain size is adjusted,
Diffuse on the surface of asphalt and press it to attach.

As the paint to be mixed with the coating material liquid, an oil paint mainly composed of boil oil or synthetic drying oil, an alcohol paint such as shellac varnish, a cellulose derivative (nitrocellulose) paint such as lacquer, and a chlorinated rubber And synthetic resin-based paints such as rubber derivative paints mainly composed of cyclized rubber, acrylic resin paints, epoxy resin paints and urethane resin paints. The use of an acrylic resin paint is most preferred from the viewpoint of ease of drying after application, ease of handling, weather resistance of the coating film, unit price, and the like. In the present invention, such a paint is colored by mixing and dispersing a pigment such as titanium white, zinc white (white), iron oxide (red), yellow lead (yellow), or phthalocyanine blue (blue). Can also be used. Further, an alkali activator may be added to such a colored paint as a binder (binder) to improve the safety, stability, permeability and the like of the paint.

The acrylic resin-coated fine-grained minced granules thus obtained according to the present invention are attached to the surface of the roof or roof of a building or the like. It can also be used for construction of outer walls and pavements of general buildings.

[0020]

The present invention prevents the generation of fine particle dust when diffusing and embedding in asphalt by coating the surface of the fine granular mince particles with a coating material liquid mainly composed of acrylic resin. be able to. Further, since it is coated with the coating material liquid, the adhesion with asphalt is good.

Further, when a coloring paint is added to the coating material liquid, the surface of the mince particles is colored, and a colored roofing material can be obtained.

[0022]

Embodiments of the present invention will be described below. FIG.
It is sectional drawing of the asphalt roofing material which concerns on this invention. The same parts as those in FIG. 3 are denoted by the same reference numerals.

As shown in FIG. 1, the pearl granules of the embodiment are fine granules 4 having a particle size of about 1 to 2 mm, and the surface of the granules 4 is coated with a coating material liquid. Is thinly coated over the entire surface to form a coating 7. The coating is a coating 7 including the convex portions of the pearl granules 4 to the extent that the original material of the pearl granules such as quartz, feldspar, and mica is not revealed.

The roofing material of the embodiment is used for cleaning and crushing fine grained mince particles 4 such as crushed stone or sand obtained by crushing natural rock.
After drying, the particles are sized by sieving to an average particle size of about 1 to 2 mm, the colored resin paint is added to the coating material liquid, and the mixture is thoroughly kneaded with a kneader or the like, and dried to form a film. Then, it is diffused and embedded in flexible asphalt.

A specific manufacturing method is shown below. First, as a coating material liquid, 50% by weight of water and acrylic resin 5
A coating material liquid composed mainly of 0% by weight of a water-soluble acrylic resin liquid is prepared. Add a pigment to this and add a 10-fold (weight ratio) dedicated thinner to the acrylic resin-based paint (concrete manufactured by Million Paint Co., Ltd.) that is colored red to sufficiently dilute it, and then thoroughly coat the coating material liquid containing this paint. To mix.

To this, 30 kg of fine granules having an average grain size of about 1 to 2 mm were added to the fine granules 4 in a weight ratio of 3% by weight. Grain 4
And knead. The kneading is put in a drum driven by a motor and rotated at a speed of about 60 rpm for 15 to 30 minutes. A colored acrylic resin coating material is coated on the surface of the grain-like material 4, and a coating 7 is formed on the entire surface of the fine grain-like material 4.

Next, the mince granules 4 coated with the coating material liquid are taken out, sufficiently dried with warm air at 100 to 180 ° C., and then cooled at room temperature to form a colored coating film 7. This is passed through a sieve having an upper mesh size of 2 mm and a lower mesh size of 1 mm to adjust the particle size to 1 to 2 mm. In addition, in the rubbing and stripping process by such stirring, it is desirable to collect and remove the scraped off colored resin by sieving.

By the method of dropping the fine-grained mince particles 4 having a grain size adjusted to 1 to 2 mm onto the surface of the asphalt 2 by dropping them from the hopper 5 and passing them through an ordinary pressing roll.
The mince granules 4 were embedded in the surface of the asphalt 2, but no dust was generated during the production. This is because the dust on the surface of the grain 4 was covered with the coating material liquid. Also, the coating material liquid improves the adhesion to the asphalt 2,
There is no peeling of the minced granules 4 from the asphalt 2. In addition, since the asphalt 2 is coated with the coating material liquid, the oil content of the asphalt 2 does not directly touch the ashes 2 due to the capillary phenomenon and the like, so that the hue of the ashes 2 varies. It won't happen. Therefore, a stable and constant-color roofing fig product can be manufactured.

[0029]

As described above, according to the method of the present invention, the whole surface of a fine granular mince grain is coated with a coating material liquid mainly containing acrylic resin to form a film. Occasionally, it is possible to prevent the generation of fine particle dust from the mince granules. Further, the coating material liquid and the asphalt also have good adhesiveness, and the mined particles are not peeled off.

Further, when a coloring paint is added to a coating material liquid mainly composed of an acrylic resin, the fine granular granules, the surface of the granular granules is colored and a colored roofing material can be obtained. Therefore, it is possible to satisfy a wide variety of demands regarding the color tone, and it is possible to greatly contribute to various construction expressions, and it is possible to use it in a wide range.

Further, since the asphalt granules are coated with a coating material, the oil content of the asphalt does not cause variations in the hue of the asphalt granules 4 due to a capillary phenomenon or the like.

[Brief description of the drawings]

FIG. 1 is a sectional view of a roofing material of the present invention.

FIG. 2 is an explanatory diagram showing a flow of diffusion / embedding.

FIG. 3 is a cross-sectional view of a conventional roofing material.

[Explanation of symbols]

 1 ………… Sheet 2 ………… Asphalt 4 ………… Mine grain 7 ………… Coating 8 ………… Dust

Claims (3)

(57) [Claims] 1. 90 to 10% by weight of water and 10 to acrylic resin
A step of producing a coating material liquid mainly composed of 90% by weight of a water-soluble acrylic resin, and a weight ratio of 0.1 to 10% by weight of the coating material liquid with respect to the fine-grained mince particles In addition, a step of kneading, a step of drying the kneaded minced granules with warm air at 100 to 180 ° C., and a step of forming a resin film on the surface of the minced granules by cooling at room temperature after the drying. And a step of diffusing and embedding the resin-coated mince particles on the surface of flexible asphalt. 2. The coating material liquid is preferably 70 to 70% water.
A method for producing a roofing material, which is mainly composed of 30% by weight of a water-soluble acrylic resin and 30 to 70% by weight of an acrylic resin. 3. The coating material liquid is more preferably water 5.
A method for producing a roof fig material, which is mainly composed of 0% by weight and a water-soluble acrylic resin of 50% by weight of an acrylic resin.