KR102375392B1 - Glass frit composition for flame retardants and flame retardats using the same - Google Patents

Abstract

The present invention relates to a glass frit composition for a flame retardant that effectively prevents the spread of fire without discharging harmful substances and improves productivity, and a flame retardant using the same. To this end, in the present invention, in a glass frit composition for a flame retardant, the glass frit composition for a flame retardant contains P ₂ O ₅ 37 to 45 wt%, Al ₂ O ₃ 15 to 25 wt%, RO+R ₂ O 30 to 48 wt% The RO + R ₂ O is at least one selected from MgO, CaO, SrO, ZnO, Li ₂ O, Na ₂ O, K ₂ O, TiO ₂ , ZrO ₂ , Sb ₂ O ₃ and combined It provides a glass frit composition for a flame retardant, characterized in that.
Therefore, according to the present invention, it is possible to provide a glass frit composition for a flame retardant that effectively prevents the spread of fire without discharging harmful substances during a fire and improves productivity at the same time.

Description

Glass frit composition for flame retardants and flame retardants using same

The present invention relates to a glass frit composition for a flame retardant and a flame retardant using the same, and more particularly, to a glass frit composition for a flame retardant that effectively prevents fire spread without discharging harmful substances and improves productivity, and a flame retardant using the same.

When a fire occurs in a building, the use of materials vulnerable to fire, such as Styrofoam, is restricted to prevent the spread of fire due to combustible materials.

Styrofoam is easy to manufacture and is widely used for industrial and home use, such as insulation, due to its excellent thermal insulation effect and low process cost. As a result, there is a problem of causing serious personal injury.

In order to solve this problem, flame retardant Styrofoam is manufactured by injecting a flame retardant into Styrofoam or by applying a porous flame retardant.

A method of manufacturing a styrofoam composite panel according to the prior art (Registration Patent No. 10-1809115) with reference to FIG. 1 will be described as follows.

First, a styrofoam is molded and a film-type nonflammable coating agent is applied as an adhesive. The film-type nonflammable coating agent is applied with a brush or spray in a thickness of 0.3 mm to 1 mm. In this state, fiber-reinforced plastic (FRP) is applied to the styrofoam coated with a film-type non-combustible coating agent and dried. Thus, the problem of Styrofoam, which is weak to heat, can be supplemented with a film-type non-combustible coating agent and fiber-reinforced plastic.

However, the method of injecting the flame retardant into the Styrofoam has a poor flame retardant effect due to the loss of the flame retardant due to the needle hole during injection, and the method of applying the flame retardant also has a problem in that the processability and thermal insulation properties are reduced, so that the productivity is lowered.

The present invention is to solve the above problems, and to provide a flame retardant glass frit composition that effectively prevents the spread of fire without discharging harmful substances in case of fire and improves productivity at the same time to produce a flame retardant and Styrofoam using the same It is an object of the present invention to

In order to achieve the above object, the present invention provides a glass frit composition for a flame retardant, wherein the glass frit composition for a flame retardant contains P ₂ O ₅ 37 to 45 wt%, Al ₂ O ₃ 15 to 25 wt%, RO+R ₂ O 30~ It consists of including 47wt%, the RO+R ₂ O is at least one of MgO, CaO, SrO, ZnO, Li ₂ O, Na ₂ O, K ₂ O, TiO ₂ , ZrO ₂ , Sb ₂ O ₃ It provides a glass frit composition for a flame retardant, characterized in that it is selected and combined.

The glass frit composition for the flame retardant preferably further contains 0.01 to 0.5 wt% of SiO ₂ or 0.5 to 3 wt% of B ₂ O ₃ .

According to the present invention, 80 to 95 wt% of a water-soluble flame retardant and 5 to 20 wt% of a glass frit composition for a flame retardant are included, and the glass frit composition for a flame retardant is P ₂ O ₅ 37 to 45 wt%, Al ₂ O ₃ 15 to 25wt%, RO+R ₂ O 30 to 47wt%, and the RO+R ₂ O is MgO, CaO, SrO, ZnO, Li ₂ O, Na ₂ O, K ₂ O, TiO ₂ , ZrO ₂ , Sb ₂ O ₃ It provides a flame retardant coating agent, characterized in that at least one or more selected and combined.

Advantageous Effects of Invention According to the present invention, it is possible to provide a glass frit composition for a flame retardant that effectively prevents the spread of fire without discharging harmful substances during a fire and improves productivity at the same time.

1 is a flowchart showing a method of manufacturing a styrofoam composite panel according to the prior art;
2 and 3 are explanatory views for explaining the function of the glass frit composition for a flame retardant according to the present invention.

The configuration and operation of specific embodiments according to the present invention will be described in detail with reference to the drawings.

The glass frit composition for a flame retardant according to the present invention comprises P ₂ O ₅ 37 to 45 wt%, Al ₂ O ₃ 15 to 25 wt%, RO+R ₂ O 30 to 47 wt%,

The RO+R ₂ O is MgO, CaO, SrO, ZnO, Li ₂ O, Na ₂ O, K ₂ O, TiO ₂ , ZrO ₂ , Sb ₂ O ₃ One type or two or more types can be selected and combined. there is.

The use of halogen and lead has a good flame retardant effect, but it has a fatal weakness to health by generating dioxin, a carcinogen, during combustion.

The glass frit composition for a flame retardant according to the present invention is free from halogen, lead, and the like, so there is no such health problem and it is harmless.

With reference to FIG. 2, the manufacturing method of the glass frit composition for flame retardants by this invention is demonstrated.

Raw materials P ₂ O _5, Al ₂ O _{3, and} RO+R ₂ O are evenly mixed in a certain ratio, and then the mixed raw materials are melted. In the glass frit composition for the flame retardant, 0.01 to 0.5 wt% of SiO ₂ or 0.5 to 3 wt% of B ₂ O ₃ may be further added for glass stability.

At this time, the melting is preferably performed in an electric furnace or electric kiln at 900 to 1500 ° C. for about 30 to 60 minutes.

Next, a quenching operation of rapidly cooling the molten molten solution is performed to prepare glass flakes. Glass flakes prepared through quenching are pulverized by a pulverizing process.

The pulverization may be performed by a dry pulverization method such as a ball mill, and the dry pulverization may be performed to adjust the particle size of the glass frit. In order to make the shape of the glass frit a spherical shape with the largest surface area, instantaneous heat that can change its shape may be applied.

Thereafter, a glass frit composition for a flame retardant may be manufactured through post-treatment such as washing.

<Experimental example>

component
(wt%)
One

2
3
4
5
6
7
P ₂ O ₅

44.31
44.20
44.31
44.00
44.00
44.00
43.98
Al ₂ O ₃

23.56
22.80
22.68
22.70
22.70
22.70
22.70
RO+R ₂ O

32.13
33.00
33.01
33.3
33.3
33.3
33.32
Sum

100
100
100
100
100
100
100
Tg

353
346
356
345
347
344
344
Ts

443
444
432
438
439
444
443

A glass frit composition for a flame retardant was prepared by mixing P ₂ O _5, Al ₂ O _{3, and} RO+R ₂ O in a certain ratio through the above process, and as a result of the experiment, P ₂ O ₅ 37~45wt%, Al ₂ O ₃ 15 It was confirmed that the thermal properties of the glass transition temperature Tg < 400 °C and the melting point Ts < 450 °C in the range of ~25wt%, RO+R ₂ O 30~47wt% were exhibited.

The glass transition temperature refers to the temperature at which the molecules of a polymer material are active and start to move. That is, it is the temperature at which the phase transition from the solid phase to the liquid phase starts to occur. At the glass transition temperature, the glass frit composition for the flame retardant changes like a soft rubber and has elasticity.

The glass frit composition for a flame retardant according to the present invention is effective in preventing the spread of fire by forming a film when a fire occurs because the glass transition starts at 400° C. or less and melts at a low temperature of 450° C. or less.

On the other hand, a flame retardant coating agent can be manufactured using the glass frit composition for flame retardants according to the present invention. The flame-retardant coating agent is preferably prepared by mixing a water-soluble flame retardant, in particular, a phosphorus-based flame retardant and the glass frit composition for a flame retardant according to the present invention.

For example, the water-soluble flame retardant composition includes 49.6 to 89.19% by weight of water, 0.2 to 5.0% by weight of guanidine phosphate, and 8.0 to 16.0% by weight of ammonium phosphate dibasic, and ammonium chloride (Ammonium chloride) 1.0-2.0 wt%, Monochloroacetic acid 0.4-2.4 wt%, Guanidine carbonate 0.1-2.0 wt%, Ethylenediamine 0.01-3.0 wt%, Disodinium It may consist of 1 to 5% by weight of octaborate tetrahydrate and 0.1 to 15% by weight of 25% guanidine phosphate.

<Experimental Example 2>

◎: very good, ○: good, △: average, x: bad
mixing ratio

granularity
RPM
mixing time
Homogeneity
Reactivity
sedimentation
water-based flame retardant
+Glass Frit_5wt% D50: 3um 300 5 minutes X 1 time ○ ◎ △ D50: 5um 300 5 minutes X 1 time ◎ ◎ ◎ D50: 10um 300 5 minutes X 1 time △ ◎ x
water-based flame retardant
+Glass Frit_7.5wt% D50: 3um 300 5 minutes X 1 time ○ ◎ △ D50: 5um 300 5 minutes X 1 time ◎ ◎ ◎ D50: 10um 300 5 minutes X 1 time △ ◎ x
water-based flame retardant
+Glass Frit_10wt% D50: 3um 300 5 minutes X 1 time ○ ◎ △ D50: 5um 300 5 minutes X 1 time ◎ ◎ ◎ D50: 10um 300 5 minutes X 1 time △ ◎ x
water-based flame retardant
+Glass Frit_12.5wt% D50: 3um 300 5 minutes X 1 time ○ ◎ △ D50: 5um 300 5 minutes X 1 time ◎ ◎ ◎ D50: 10um 300 5 minutes X 1 time △ ◎ x
water-based flame retardant
+Glass Frit_15wt% D50: 3um 300 5 minutes X 1 time ○ ◎ △ D50: 5um 300 5 minutes X 1 time ◎ ◎ ◎ D50: 10um 300 5 minutes X 1 time △ ◎ x
water-based flame retardant
+Glass Frit_17.5wt% D50: 3um 300 5 minutes X 1 time ○ ◎ △ D50: 5um 300 5 minutes X 1 time ◎ ◎ ◎ D50: 10um 300 5 minutes X 1 time △ ◎ x
water-based flame retardant
+Glass Frit_20wt% D50: 3um 300 5 minutes X 1 time ○ ◎ △ D50: 5um 300 5 minutes X 1 time ◎ ◎ ◎ D50: 10um 300 5 minutes X 1 time △ ◎ x

In the mixing experiment of water-soluble flame retardant and glass frit, while changing the particle size, RPM 300 and mixing time were set to 5 minutes.

2 and 3, when a fire occurs when a substrate made of combustible materials such as styrofoam is burned, the coated water-soluble flame retardant composition is first carbonized before the substrate is burned to form a carbon film to suppress and delay combustion. However, there is a disadvantage in that the Styrofoam structure cannot be maintained.

The glass frit composition for a flame retardant according to the present invention is melted at a low temperature to form a film layer on the Styrofoam and the flame retardant to block oxygen to suppress combustion and maintain a physical structure.

In this case, the glass frit composition for the flame retardant must be capable of being fired at at least 430° C. to form a film layer by enclosing the Styrofoam beads and the flame retardant. As shown in the experimental results, the glass frit composition for a flame retardant according to the present invention undergoes a glass transition at 400° C. or less, so it is very advantageous for forming a film layer.

On the other hand, a process for producing the flame-retardant Styrofoam using the flame-retardant coating agent will be described.

First, expanded polystyrofoam is pulverized to prepare expanded polystyrofoam particles having a constant particle size. The pulverization may be performed using a cutting mill equipped with a pulverizing blade.

Next, the expanded polystyrofoam particles and expanded graphite are mixed, and a solvent and a binder are mixed in the mixture. A modified limonene solvent may be used as the solvent, and 5 to 10 parts by weight of one or more additives selected from the group consisting of hydroxyapatite, calcium nitrite, zeolite, clay and loess are added to the modified limonene solvent based on 100 parts by weight of the limonene solvent. one can be used.

The binder acts as a binder for expanded polystyrene particles, and a magnesium phosphate-based inorganic binder can be used. to prevent cracks from occurring.

The mixed mixture is stirred at a temperature of 50 to 60° C. at a stirring speed of 300 to 800 rpm using a stirrer for 30 to 60 minutes. When the stirring operation is performed, the mixing fire is uniformly dispersed and mixed.

After the stirring operation is completed, the stirred mixture is put into a mold of a certain shape and pressed to manufacture compressed Styrofoam, and the compressed Styrofoam is pressurized with a press at a constant temperature to prepare thermocompression Styrofoam.

Thereafter, a flame-retardant coating agent is applied to the thermocompression-bonded Styrofoam. When the flame-retardant coating agent according to the present invention is applied to the surface of the thermocompression Styrofoam, the flame retardant coating agent penetrates into the inside of the thermocompression Styrofoam to have a flame retardant inside.

Finally, the flame-retardant Styrofoam is completed by drying the thermocompression-bonded Styrofoam coated with the flame-retardant coating agent. The drying may be performed by drying the thermocompression-bonded Styrofoam at a temperature of 70 to 80° C. for 1 to 5 hours.

Although the above has been described with reference to the embodiments of the present invention, those of ordinary skill in the art can variously modify and modify the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below. You will understand that it can be changed.

Claims (3)

pulverizing expanded polystyrofoam to prepare expanded polystyrofoam particles;
mixing the expanded polystyrofoam particles and expanded graphite, and mixing a solvent and a binder in the mixture;
agitating the mixture using a stirrer for 30 to 60 minutes at a stirring speed of 300 to 800 rpm at a temperature of 50 to 60° C.;
Preparing the compressed Styrofoam by putting the stirred mixture into a mold of a certain shape and pressing, and pressing the compressed Styrofoam with a press at a constant temperature to prepare a thermocompressed Styrofoam;
applying a flame-retardant coating agent to the thermocompression plastic;
A step of drying the thermocompression-bonded Styrofoam coated with the flame retardant coating is performed,
The flame retardant coating agent comprises 80 to 95 wt% of a water-soluble flame retardant and 5 to 20 wt% of a flame retardant glass frit composition,
The glass frit composition for the flame retardant contains P ₂ O ₅ 37 to 45 wt%, Al ₂ O ₃ 15 to 25 wt%, RO+R ₂ O 30 to 47 wt%,
The RO+R ₂ O is MgO, CaO, SrO, ZnO, Li ₂ O, Na ₂ O, K ₂ O, TiO ₂ , ZrO ₂ , Sb ₂ O ₃ Flame-retardant Styrofoam production method in which at least one is selected and combined . delete delete

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