KR20040044729A - Composition for foaming, foamed material using the composition and manufacturing method thereof - Google Patents

Abstract

PURPOSE: Provided is a composition for manufacturing foamed products having high strength and resistance against heat, water, fire and sound by using natural inorganic materials. CONSTITUTION: The foamed products are manufactured by the following steps of: dissolving 40-60g of MgCl2(more than 45% of purity) in 30-40g of water, and adding 0.4-0.6g of H3PO4(more than 98% of purity) to keep bonding strength of MgO and MgCl2 for a long time and 0.1-0.5g of vinylon fiber to MgCl2 solution to increase tensile strength for a first mixture; adding 100g of MgO(more than 85% of purity) and kneading to get a second mixture; adding 2-14ml of H2O2(more than 28% of purity) and expanding; forming expanded materials; drying and cutting.

Description

Composition for foaming, foam and foaming method using the same {Composition for foaming, foamed material using the composition and manufacturing method

The present invention relates to a foaming composition, a foam using the same and a method for producing the foam. More specifically, the present invention relates to a foaming composition for producing a foam having excellent heat insulating properties, fire resistance, soundproofing and water resistance without including an inorganic insulating material such as glass fiber or asbestos, and a foam and a method for producing the foam using the same. will be.

Conventionally, glass fibers, styrofoam (polystyrene foam), polyurethane foam, or asbestos have been used as various insulation materials for building, refrigeration, and the like.

Although glass fiber and asbestos are inexpensive and have excellent thermal insulation, they cause irritation to the skin during handling and avoid the worker's avoidance, as well as the occurrence of dust.In particular, asbestos is used as a major cause of cancer and pneumoconiosis. This is being avoided. In addition, glass fiber and asbestos are not incinerated even after disposal, so production itself is regulated as a main culprit of environmental pollution, and the use of building materials is restricted. Styrofoam or polyurethane foam has the disadvantage that it is decisively vulnerable to fire, harmful gas is generated during incineration waste is also a problem of environmental pollution, there is a problem that landfill waste is difficult because it does not naturally decompose.

SUMMARY OF THE INVENTION An object of the present invention is to provide a foaming composition for producing a foam having excellent heat insulation, fire resistance, soundproofing and water resistance without including an inorganic insulating material such as glass fiber or asbestos, and a foam and a method for producing the foam using the same. have.

The foaming composition according to the present invention is based on 100 g of magnesium oxide powder having a purity of 85% or more, magnesium chloride 40 to 60g with a purity of 45% or more, 0.4 to 0.6g of phosphoric acid having a purity of 98% or more, vinylon fiber 0.1 to 0.5g and a purity of 28 It is characterized by comprising 2 to 14ml of hydrogen peroxide that is more than%.

The foam according to the present invention is 40 to 60 g of magnesium chloride (purity of 45% or more), 0.4 to 0.6 g of phosphoric acid (purity of 98% or more), 0.1 to 0.5 g of vinylon, based on 100 g of magnesium oxide having a purity of 85% or more. 2-14 mL of hydrogen peroxide (purity of 28% or more) is added to an aqueous solution formed by dissolving the fiber in 30 to 40 g of water, followed by foaming, followed by molding and drying the foam.

Moreover, the manufacturing method of the foam which concerns on this invention is (1) 0.4-0.6 g phosphoric acid (purity 98% or more) in the aqueous solution which melt | dissolved 40-60 g of magnesium chloride (purity 45% or more) in 30-40 g of water. A first mixing step of adding 0.1-0.5 g of vinylon fibers and mixing them evenly to obtain a first mixture; (2) a kneading step of adding 100 g of magnesium oxide (purity 85% or more) to the first mixture obtained in the first mixing step, and kneading the mixture to obtain a second mixture; (3) a foaming step of kneading by adding 2 to 14 ml of hydrogen peroxide (purity of 28% or more) to the second mixture obtained in the kneading step, and foaming; (4) molding the foamed composition; And a post-treatment step of drying the molded molding and performing normal post-treatment such as cutting.

Hereinafter, the present invention will be described in detail with reference to specific examples.

The foaming composition according to the present invention is based on 100 g of magnesium oxide powder having a purity of 85% or more, magnesium chloride 40 to 60g with a purity of 45% or more, 0.4 to 0.6g of phosphoric acid having a purity of 98% or more, vinylon fiber 0.1 to 0.5g and a purity of 28 It is characterized by comprising 2 to 14ml of hydrogen peroxide that is more than%.

In the above, magnesium oxide plays a role of cement together with magnesium chloride, and forms a hard crystal to increase the strength, fire, waterproof and heat insulation. When the content of magnesium oxide is contained less than 100g as a relative ratio with respect to the total composition, the structure of the crystals become weak, there may be a problem that the strength is weak, on the contrary if too much contained more than 100g There is a problem that the strength is too strong, the weight is heavy and difficult to handle.

The magnesium chloride is used in an amount of 40 to 60 g based on 100 g of the magnesium oxide, and acts as a cement together with the magnesium oxide, to form hard crystals to increase the strength, and to fire, waterproof and heat insulation. do. When the magnesium chloride content is less than 40g, there may be a problem that the crystal structure is weakened to reduce the strength, if the content exceeds 60g, the surplus remaining on the surface reacts with moisture in the air, causing condensation. And, there may be a problem that the surface strength is lowered, there may be a problem that the white powder is buried in a dry state.

Phosphoric acid in the above functions to maintain the long-term bond strength of the magnesium oxide and the magnesium chloride. If the phosphoric acid is included in less than 0.4g, there may be a problem that the strength retention function is lowered, the strength is lowered, on the contrary, if the phosphoric acid is more than 0.6g, there is a problem that the productivity of the overall composition is reduced by the long drying time Can be.

In the above, vinylon fibers are used for the purpose of increasing the tensile strength of the composition as a reinforcing fiber. The vinylon fiber is formed by molding a vinyl as a fiber having a length of 0.6 to 1 cm, and when the vinylon fiber is included in less than 0.1 g, there may be a problem that the tensile strength is weakened, and when it exceeds 0.5 g, Powders are generated by separating the bond of the composition, there may be a problem that the surface strength is lowered. As a reinforcing fiber, fibrous material such as nylon fiber or glass fiber may be used instead of the vinylon fiber, but nylon fiber has a problem of lowering strength, and glass fiber, etc., irritates the skin during handling and avoids worker dust. There is a problem of occurrence, etc. In particular, asbestos is being used as a major cause of cancer and pneumoconiosis. In addition, glass fiber or asbestos is not an incineration waste, even after disposal, there is a problem that the production itself is regulated as the main culprit of environmental pollution.

The foam according to the present invention is 40 to 60 g of magnesium chloride (purity of 45% or more), 0.4 to 0.6 g of phosphoric acid (purity of 98% or more), 0.1 to 0.5 g of vinylon, based on 100 g of magnesium oxide having a purity of 85% or more. 2 to 14 ml of hydrogen peroxide (purity of 28% or more) is added to an aqueous solution in which fibers are dissolved in 30 to 40 g of water, followed by foaming, followed by molding and drying of the foam.

The foam according to the present invention is formed by adding hydrogen peroxide to the aqueous solution having the above-mentioned composition and foaming it into a plate or the like, and a plurality of fine bubbles are formed in the foam, and due to the presence of such fine bubbles, glass fibers or asbestos, etc. A foam having excellent heat insulation, fire resistance, sound insulation and water resistance is formed without including an inorganic insulating material. In particular, the present invention has a high tensile strength by the use of vinylon fibers, increases the strength by the cement role of magnesium oxide and magnesium chloride and the formation of hard crystals, and improves the fire, waterproof and thermal insulation. In particular, the use of phosphoric acid maintains the bonding strength of the magnesium oxide and the magnesium chloride in the long term, thereby giving the effect of maintaining high mechanical strength for a long time.

Moreover, the manufacturing method of the foam which concerns on this invention is (1) 0.4-0.6 g phosphoric acid (purity 98% or more) in the aqueous solution which melt | dissolved 40-60 g of magnesium chloride (purity 45% or more) in 30-40 g of water. A first mixing step of adding 0.1-0.5 g of vinylon fibers and mixing them evenly to obtain a first mixture; (2) a kneading step of adding 100 g of magnesium oxide (purity 85% or more) to the first mixture obtained in the first mixing step, and kneading the mixture to obtain a second mixture; (3) a foaming step of kneading by adding 2 to 14 ml of hydrogen peroxide (purity of 28% or more) to the second mixture obtained in the kneading step, and foaming; (4) molding the foamed composition; And a post-treatment step of drying the molded molding and performing normal post-treatment such as cutting.

In the first mixing step of (1), 0.4 to 0.6 g of phosphoric acid (purity of 98% or more), 0.1 to 0.5 g in an aqueous solution of 40 to 60 g of magnesium chloride (purity of 45% or more) dissolved in 30 to 40 g of water It is made by adding vinylon fiber and mixing it evenly, and mixing the remaining ingredients except magnesium oxide and hydrogen peroxide, which are the main components of foaming, to increase the mixing rate.

The kneading step of (2) is made by adding 100 g of magnesium oxide (purity of 85% or more) to the first mixture in an aqueous solution state in the first mixing step of (1), and in this step, it becomes a kneading state having viscosity. A second mixture is obtained. This second mixture is foamed by a strong foaming action by 2 to 14 ml of hydrogen peroxide (purity of 28% or more) applied in the subsequent foaming step (3), thereby forming a large number of bubbles to form a foam according to the present invention. .

Thereafter, in the forming step (4), the plate is molded into a predetermined shape such as a plate shape, and in the subsequent post-treatment step of (5), ordinary post-treatment such as drying and cutting is performed to prepare the foam according to the present invention. You are done.

Hereinafter, preferred embodiments and comparative examples of the present invention will be described.

The following examples are intended to illustrate the invention and should not be understood as limiting the scope of the invention.

Example

5 kg of magnesium chloride with 45% magnesium chloride was dissolved in 4 kg of water at room temperature to form an aqueous solution having a density of 25 g / ml. The aqueous solution had 5% phosphoric acid with 98% content and 200 g of vinylon fiber with a length of 0.7 cm. Is added to the aqueous solution and mixed well. 80 ml of hydrogen peroxide having a purity of 28% was added to the mixture, which was rapidly rotated and kneaded to foam. Thereafter, the material was poured into a box having dimensions of 1,200 mm * 600 mm * 1,000 mm in width, length, and height, respectively, and then molded. After molding, it was dried for 24 hours, and then taken out from the box, and then cut into a size of 1,200 mm * 600 mm * 90 mm in width, length and thickness with a woodworking saw, respectively, to complete the plate-shaped foam according to the present invention. .

Experimental Example

Evaluation of physical properties of the plate foam

The cross section compressive strength, axial compressive strength, anti-impact, fire resistance, heat insulation, sound insulation and water resistance of the plate-shaped foams obtained in the above examples were evaluated.

It was confirmed that the cross-sectional anti-tensile strength was 2,500 N when the plate-shaped foam was intensively loaded.

It was confirmed that the axial drag strength indicates 250 kN / m when a load was applied to the axial plane of the plate-shaped foam.

It was confirmed that the anti-impact did not break when 10 kg of sand bags were freely dropped 100 times at a height of 50 cm.

When the flammability was directly exposed to the flame, no flammability and combustion occurred even after 2 hours or more of exposure, and only a change in the degree of discoloration of the white surface was visually observed.

The heat insulation was measured that when the temperature of the heating surface became 820 ° C by applying heat to the plate-shaped foam for 30 minutes, the temperature on the opposite side to the heating surface was 25 ° C, and after 60 minutes, the temperature of the heating surface was 940 ° C. The temperature of the opposite side was 32 degreeC when it became C, and after 90 minutes, when the temperature of the heating side became 980 degreeC, the temperature of the opposite surface was 45 degreeC, and after 120 minutes, the temperature of the heating surface was When it became 1,020 degreeC, it was confirmed that the temperature of the opposite surface was 55 degreeC.

Test values for the sound insulation was shown in Table 1, the average sound insulation was 40㏈.

㎐ 125 250 500 1,000 2,000 4,000 8,000 ㏈ 35 32 36 43 47 46 54

Water resistance: After immersing the plate-shaped foam in water for 50 days, when the appearance was visually evaluated, after 50 days of immersion, the slightly yellowish surface of the foam was discolored to grayish white. Not observed.

Foam according to the present invention can be used as a heat insulating material for building, ships, and the like, sound insulation, refrigeration, refrigeration facilities.

Therefore, according to the present invention, by replacing the glass fiber, styrofoam, polyurethane foam, etc., which are existing heat insulating materials, it was possible to solve the environment and fire protection problems, and in particular, the products having various specifications due to excellent fire resistance, water resistance, sound insulation, moldability and strength. It is possible to manufacture, by using a naturally-occurring mineral rich in reserves as the main raw material, the cost is reduced, there is an effect of providing a foam having excellent practicality.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and modifications are within the scope of the appended claims.

Claims (4)

40 to 60 g of magnesium chloride having a purity of 45% or more, 0.4 to 0.6 g of phosphoric acid having a purity of 98% or higher, 0.1 to 0.5 g of vinylon fiber and 2 to 14 ml of hydrogen peroxide having a purity of 28% or more, based on 100 g of magnesium oxide powder having a purity of 85% or more. Foaming composition, characterized in that made by. The method of claim 1, The foaming composition, characterized in that the vinylon fiber has a length of 0.6 to 1cm. 40 to 60 g of magnesium chloride (purity of 45% or more), 0.4 to 0.6 g of phosphoric acid (more than 98% of purity), and 0.1 to 0.5 g of vinylon fiber based on 100 g of magnesium oxide having a purity of 85% or more, 30 to 40 g of water A foam formed by adding 2 to 14 ml of hydrogen peroxide (purity of 28% or more) to an aqueous solution formed by dissolving in a foam, followed by molding and drying the foam. (1) 0.4 to 0.6 g of phosphoric acid (purity of 98% or more) and 0.1 to 0.5 g of vinylon fiber are added to an aqueous solution in which 40 to 60 g of magnesium chloride (purity of 45% or more) is dissolved in 30 to 40 g of water. A first mixing step of mixing to obtain a first mixture; (2) a kneading step of adding 100 g of magnesium oxide (purity 85% or more) to the first mixture obtained in the first mixing step, and kneading the mixture to obtain a second mixture; (3) a foaming step of kneading by adding 2 to 14 ml of hydrogen peroxide (purity of 28% or more) to the second mixture obtained in the kneading step, and foaming; (4) molding the foamed composition; And Drying the molded molding, and a post-treatment step for performing a conventional post-treatment, such as cutting; manufacturing method of the foam comprising a.