JP6467692B1 - Thermally expandable fireproof insulation coating and fireproof insulation sheet for cables using the same - Google Patents

Abstract

A heat-expandable fire-resistant and heat-insulating paint and a fire-resistant and heat-insulating sheet for cables using the same are provided. A resin binder, an inorganic filler, thermally expandable graphite, a mixture of a phosphorus compound, a polyhydric alcohol and melamine, a copper oxide, a polyhydric alcohol, and a thermally expandable microsphere. Thermally expandable fireproof insulation coating. Furthermore, the said heat-expandable fireproof heat insulation coating material containing heat-expandable aluminum phosphite. Further, the present invention is characterized in that a heat-expandable fireproof and heat-insulating paint is provided on one or both sides of the base sheet. [Selection] Figure 1

Description

The present invention relates to a heat-expandable fire-resistant and heat-insulating paint and a fire-resistant and heat-insulating sheet for cables using the same.

Fire fighting cables used for fire fighting equipment such as fire extinguishing equipment, alarm equipment, evacuation equipment and the like for fire prevention objects are roughly classified into heat resistant cables for small power circuits and fire resistant cables. The heat-resistant cable for a small power circuit is a cable for a weak electric circuit of 60 V or less having heat resistance for operating a fire extinguishing equipment and an evacuation guidance equipment for a certain period of time in the event of a disaster. Fireproof cables are generally used for power supply during normal times and fire extinguishing equipment and evacuation guidance equipment for a certain period of time in the event of a fire. Low-voltage cables, high-voltage cables used for emergency power supply trunks for 6600V, whose working voltage exceeds 600V, and highly flame-retardant non-halogen fire-resistant cables that do not contain halogen in the material constituting the insulator protective coating. In particular, the structure of a high-pressure fireproof cable among fireproof cables is composed of a fireproof layer, an insulator layer, a semiconductive layer, a metal shielding layer, a pressing tape, and an outer sheath layer on a conventional conductor. In such a refractory cable, cables having various structures have been developed as having particularly excellent performance.

For example, Patent Document 1 discloses a conventional high-pressure fireproof cable having a tape containing ceramic fibers and cellulose, the outer side being made of aluminum tape, and the ceramic tape having both sides made of polyethylene film. ing.

Further, Patent Document 2 discloses a structure in which a heat insulating layer composed of a mixed layer of mica scale and cellulose pulp and a reinforcing layer and a heat-foaming fireproof layer are formed on the core of a conventional high-pressure fireproof cable structure. Yes.

Furthermore, Patent Document 3 discloses a foamed fireproof paint applied to an inorganic noncombustible sheet.

Japanese Patent No. 3148079 Japanese Patent No. 3287868 Japanese Utility Model Publication 1-26004

However, in the structures disclosed in Patent Document 1, Patent Document 2, and Patent Document 3, when the cable outer layer is exposed to a flame, the thermal expansion layer is prevented from falling off, the heat conduction is reduced, and the internal structure is formed by heat absorption. It cannot be said that the structure is sufficient for avoiding melting of the steel and preventing the flame from entering the back surface.

Therefore, according to the present invention, when the outer layer of the cable is exposed to a flame, even if the initial thickness is 0.5 mm to 1 mm, touching the heat source at the time of fire makes the thickness 40 to 60 times and the volume 50 to 80 times. A thin film that forms a strong expansion layer with excellent shape retention that prevents fire penetration into the internal structure and prevents the penetration of the flame into the back by reducing the heat insulation effect and heat conduction It aims at providing the fire-proof heat insulation sheet | seat for cables using the heat-expandable fire-proof heat insulation coating material of this.

The present invention relates to a resin binder, an inorganic filler, a thermally expandable graphite, a mixture of a phosphorus compound, a polyhydric alcohol and melamine, and a copper oxide having a blending amount of 20 to 100 parts by weight with respect to 100 parts by weight of the solid content of the resin binder. The present invention provides a heat-expandable fire-resistant and heat-insulating paint characterized by containing a product, glycerin , and heat-expandable microspheres.

Moreover, this invention provides the said heat | fever expansible fireproof heat insulation coating material containing a heat | fever expansible aluminum phosphite.

Furthermore, this invention provides the fireproof heat insulation sheet | seat for cables provided with the said thermally expansible fireproof heat insulation coating material in the single side | surface or both surfaces of a base material sheet.

The heat-expandable fire-resistant heat-insulating paint of the present invention and the fire-resistant heat-insulating sheet for cables using the same are significantly reduced in heat-resistant heat insulation, heat conduction, and heat absorption compared to conventional fire-resistant compositions, heat-insulating compositions, and foam fire-resistant paint Because it has excellent effects such as avoiding melting of internal structures and preventing the penetration of the flame into the back surface, it is possible to reduce the number of mica tapes that are conventionally used as fireproof compositions and reduce the number of times they are used. Efficiency.

It is sectional drawing which apply | coated and integrated the heat-expandable fireproof heat insulation coating material of this invention to the single side | surface of the base material sheet. It is sectional drawing which apply | coated and integrated the heat-expandable fireproof heat insulation coating material of this invention on both surfaces of the base material sheet.

Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. 1 and 2. The cable fireproof heat insulating sheet of the present invention is a cable fireproof heat insulating sheet provided with the heat-expandable fireproof heat insulating paint 1 on one or both surfaces of the base sheet 2.

The heat-expandable fire-resistant and heat-insulating paint 1 expands when heated by a fire, and has excellent fire resistance, heat insulation performance, heat conduction reduction performance, heat absorption performance, shape retention that prevents the flame from entering the back of the sheet, etc. It is a heat-expandable fireproof and heat-insulating coating material that forms a flexible expansion layer.

The base sheet 2 is a flexible, thin-film sheet-like molded product having a strength for supporting the heat-expandable fire-resistant and heat-insulating paint 1.

The component which comprises the thermally expansible fireproof heat insulation coating material 1 used for this invention is demonstrated. First, the resin binder will be described. The resin binder is not particularly limited, and examples thereof include resin binders such as urethane, alkyd, acrylic, silicone, ethylene vinyl acetate, poval, epoxy, and phenol. The resin binder can fix the heat-expandable fire-resistant and heat-insulating paint to the base sheet 2 and may be a resin binder having flexibility. Among these, highly flexible urethane and silicone are preferable.

Next, the inorganic filler will be described. The inorganic filler is not particularly limited, but silica, calcium carbonate, magnesium carbonate, talc, clay, mica, montmorillonite, bentonite, alumina, diatomaceous earth, hollow glass beads, shirasu balloon, fly ash balloon, perlite, zinc oxide, titanium oxide, etc. Is mentioned. These hold | maintain the shape of a thermal expansion layer, and may use 1 type or 2 types or more.

Next, the thermally expandable graphite will be described. Thermally expandable graphite is a conventionally known substance and expands 50 to 350 times in volume ratio by heating by fire to form a refractory heat insulating layer. Thermally expandable graphite is a carbon intercalation compound containing sulfuric acid, nitric acid, hydrogen peroxide, dichromic acid, etc. between the layers of the scaly graphite structure, and is further neutralized with ammonia, an aliphatic lower amine or the like.

The particle size of the thermally expandable graphite is 30 to 100 mesh. When it is 100 mesh or more, the thermal expansion ratio becomes small, and a sufficient fireproof heat insulating layer cannot be formed. Moreover, when it is 30 mesh or less, although it is good for formation of a fireproof heat insulation layer, the dispersibility at the time of forming a paint and the adhering to a base material sheet worsen, and the softness | flexibility of a sheet | seat is lost.

The expansion temperature of the thermally expandable graphite is preferably 180 ° C. to 230 ° C. that expands in a low temperature region. The expansion ratio is 50 to 350 times in volume ratio. Preferably, the volume ratio is 150 to 350 times.

Moreover, the compounding quantity of thermally expansible graphite is 100 weight part-400 weight part with respect to 100 weight part of solid content of a resin binder. If it is less than 100 parts by weight, the effect of fireproof insulation is not sufficient, and if it is 400 parts by weight or more, the effect is increased, but the expansion layer tends to fall off and may not provide the fireproof insulation effect. Preferably, it is 150 to 350 weight part.

Next, a mixture of a phosphorus compound, a polyhydric alcohol, and a melamine compound will be described. Phosphorus compounds include red phosphorus, triethyl phosphate, trimethyl phosphate, triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl phenyl phosphate, sodium phosphate, potassium phosphate, magnesium phosphate, polyphosphorus Although ammonium acid etc. are mentioned, use of ammonium polyphosphate is particularly preferable. Examples of the polyhydric alcohol include ethylene glycol, diethylene glycol, propylene glycol, butylene glycol, neopentyl glycol, trimethylol propane, cellulose, glycerin, pentaerythritol, dipentaerythritol and the like, and the use of pentaerythritol is particularly preferable. Examples of melamine compounds include melamine, melamine cyanurate, methylolated melamine, hexamethoxymethyl melamine, melamine pyrophosphate, melamine orthophosphate, and the use of melamine is particularly preferable.

Furthermore, a boron compound can be used in place of or in combination with a phosphorus compound. Examples of the boron compound include boric acid, zinc borate, sodium borate, trimethyl borate, and tributyl borate.

In particular, a mixture of ammonium polyphosphate, pentaerythritol, and melamine reacts with ammonium polyphosphate and pentaerythritol under heating by a flame to form a carbonized layer that blocks radiant heat from the flame, and exhibits a dehydration endothermic effect. . Moreover, ammonium polyphosphate exhibits the binder effect which prevents the thermal expansion layer from falling off by becoming a phosphate glass. Melamine produces an inert nitrogen gas by thermal decomposition and exhibits the effect of delaying heat conduction.

A mixture of ammonium polyphosphate, pentaerythritol and melamine is commercially available and can be used. The blending is 100 to 400 parts by weight. If it is less than 100 parts by weight, the formation of the carbonized layer is not sufficient, and radiant heat due to the flame cannot be prevented. When it is 400 parts by weight or more, dispersibility deteriorates when kneading with the binder resin, and a uniform coating film cannot be obtained, and the physical properties of the coating film decrease. The amount is preferably 150 to 350 parts by weight.

Next, copper oxide and glycerin will be described. Since copper oxide is a catalyst that promotes the decomposition of glycerin under the heating condition by flame , the so-called redox reaction is repeated, so that the endothermic effect due to the dehydration reaction is reversibly continued. dehydration endothermic effect irreversible hydroxide a Le Mi which had been used in a large amount for the purpose of, without using metal hydrates such as magnesium hydroxide, these small amounts of copper oxide and glycerin instead By using it, an elongated sheet of a thin film suitable for continuous production having a continuous endothermic effect can be obtained.

Examples of the copper oxide include cuprous oxide and cupric oxide, but cupric oxide having a high degree of oxidation is preferable. A compounding quantity is 20-100 weight part. If it is less than 20 parts by weight, the effect of promoting the decomposition of glycerin is not sufficient, and if it exceeds 100 parts by weight, the catalytic effect does not increase. Preferably it is 20-80 weight part.

In addition to glycerin, ethylene glycol, diethylene glycol, propylene glycol, butylene glycol, neopentyl glycol, trimethylol propane, cellulose , pentaerythritol, dipentaerythritol, etc. can be mentioned, but the decomposition reactivity with cupric oxide Good glycerin is preferable, and a purified product having a purity of 99% or more is more preferable. The amount is 30 to 200 parts by weight. If it is less than 30 parts by weight, sufficient dehydration endothermic effect is not exhibited. When it is 200 parts by weight or more, when the sheet is formed, a tacky feeling remains in the paint and causes blocking. Preferably, it is 30-150 weight part.

Next, the thermally expandable microsphere will be described. Thermally expandable microspheres have an outer shell of a thermoplastic resin having an average particle size of 5 to 50 μm that expands 50 to 100 times in volume ratio by heating at a relatively low temperature for a short time. This is a thermally expandable capsule containing hydrogen. The outer shell thermoplastic resin is a thermoplastic resin made of a copolymer such as vinylidene chloride, acrylonitrile, acrylic acid ester, methacrylic acid ester, etc., and the expansion agent contained inside is isobutane, pentane, hexane, heptane, etc. It is a low boiling point hydrocarbon.

In the thermally expandable microsphere, when the outer shell resin is heated above the softening point, the outer shell starts to soften, and at the same time, the low-boiling hydrocarbons contained therein are gasified to increase the internal pressure and expand. When heated further, the thermally expandable microspheres disappear, but the thermally expandable microspheres that have been heated and lost inside the expanded layer of thermally expanded graphite expand to form porous voids. Heat conduction can be reduced by the gap.

Further, since the expansion of the thermally expandable microspheres expands uniformly not only in the thickness direction but also in the plane direction, it is possible to prevent the flame from entering the back surface of the sheet-like molded product. Further, even when a slight gap is generated between the sheets, the gap can be closed by the expansion in the plane direction, so that intrusion of flame from the gap can be prevented.

The average particle size of the thermally expandable microsphere is preferably 10 to 50 μm, more preferably 20 to 30 μm. If the average particle size is small, the degree of expansion becomes small, and the effect of reducing heat conduction due to the porous voids remaining after the heat dissipation in the expanded layer cannot be obtained sufficiently. When the average particle size is larger than 50 μm, there is an advantage that the degree of expansion increases and the porous voids after heating disappears, but there is an increase in melt dropping in which the outer shell resin entrains other components at the contact surface with the flame. . The maximum expansion temperature is preferably 190 to 250 ° C. The amount is 20 to 100 parts by weight. If it is less than 20 parts by weight, the effect of reducing heat conduction due to the porous voids cannot be sufficiently obtained. When the amount exceeds 100 parts by weight, the molten dripping in which the outer shell resin entrains other components at the contact surface with the flame increases. Preferably it is 20-80 weight part.

The heat-expandable fireproof and heat-insulating paint of the present invention preferably contains heat-expandable aluminum phosphite. The heat-expandable aluminum phosphite forms a dense and strong porous expansion layer, and can maintain the shape of the heat expansion layer.

Thermally expandable aluminum phosphite is a high expansion body in which thermally expandable graphite and thermally expandable microspheres expand in a low temperature region around 200 ° C., whereas thermally expandable aluminum phosphite starts from 350 ° C. A dense and strong porous expansion layer is formed in a high temperature region of 480 ° C. By containing thermally expandable graphite, thermally expandable microspheres, and thermally expandable aluminum phosphite, the high temperature region can be compensated from the low temperature region, and a high expansion body that tends to become coarse and a dense and strong material. An expanded layer having a porous expanded layer and excellent shape retention can be formed.

The average particle diameter of the heat-expandable aluminum phosphite is preferably 20 μm to 50 μm. If the average particle diameter is larger than that, the dispersibility at the time of kneading with the resin deteriorates and the physical properties of the coating film are inevitably lowered. The blending amount is 20 to 300 parts by weight. If it is less than 20 parts by weight, it is not sufficient to form a porous and dense expanded layer, and the shape of the thermally expanded layer cannot be maintained. If it is 200 parts by weight or more, it is not preferable because it restricts the expansion of a high expansion body such as thermal expansion graphite and thermal expansion microsphere.

Next, the base material sheet 2 carrying the heat-expandable fireproof heat insulating paint will be described. The base material sheet 2 is a sheet that carries a heat-expandable fireproof and heat-insulating paint on one side or both sides, and examples thereof include glass cloth, non-woven fabric, woven fabric, resin film, and ceramic paper. Although it is not particularly limited as long as it is a long sheet having a thickness of 0.02 mm to 1 mm and has strength and flexibility, a glass cloth excellent in strength, flexibility, heat resistance and insulation is preferable, and further, defoaming is performed when coating is applied A plain plain glass cloth is more preferable.

The fire-resistant and heat-insulating sheet for cables using the heat-expandable fire-resistant and heat-insulating paint in the present invention is not particularly limited as a solvent-based or water-based paint, but as a heat-expandable fire-resistant and heat-insulating paint, a B-type viscometer viscosity is 2000 mPa · s to 6000 mPa. The heat-expandable fire-resistant and heat-insulating paint 1 adjusted to s is manufactured by applying and integrating on one or both sides of the base sheet 2 by a known application means such as a ni coater, comma coater, roll coater, gravure coater, dipping, etc. Further, the integrated product is manufactured by slitting it into a desired width with a known slitting machine.

Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not necessarily limited thereto.

(Example 1, Example 2, Comparative Examples 1 to 4)
The heat-expandable fire-resistant and heat-insulating paint composition shown in Table 1 below was applied and fixed to one side of a plain weave glass cloth having a thickness of 0.17 mm and a mass of 203 g / m ² using a bar coater. The coating thickness was 0.5 mm and the total thickness was 0.67 mm. A sheet 150 mm long and 150 mm long was obtained.

Further, the same heat-expandable fire-resistant and heat-insulating coating composition as in Example 1 was applied and fixed to one side of a plain weave glass cloth having a thickness of 0.17 mm and a mass of 203 g / m ² with a bar coater. .67 mm width 50 mm length 900 mm tape was formed, and this was wound instead of the polyester nonwoven fabric used under the outer sheath of the current cable product 600V cross-linked polyethylene insulated vinyl sheath 600V-CV22SQ3 core to obtain a cable .

(Comparative Example 5)
600V XLPE insulated vinyl sheath 600V-CV22SQ3 heart thick instead of the polyester nonwoven fabric is used under the outer layer sheath 0.17 mm, by winding a tape-like plain weave glass cloth weight 203 g / ^{m 2} width 50mm length 900mm Got the cable.

Conduct a heating test using the sheet obtained by the above method, and evaluate the maximum temperature, average temperature, thickness expansion ratio, plane expansion ratio, volume expansion ratio, fire resistance, heat insulation, thermal expansion layer shape retention, The obtained evaluation results are shown in Table 1. Also, a cable heating test using an electric furnace was performed, and the results obtained by evaluating the state of insulation layer deformation due to load loading, contact between conductors, craft paper-mediated combustion, and discoloration of the conductors are shown in the evaluation result items. It was.

(Fireproof insulation evaluation method)
The fire-resistant heat insulation evaluation method of Example 1, Example 2, and Comparative Examples 1 to 4. Create an instrument that horizontally holds the evaluation sheet, and according to the test method using a UL94-5V lithographic test piece, burner 20 degrees inclined 125mm flame from below, absorbent cotton 50mm vertically and horizontally at the bottom of the burner for evaluation The sheet was in contact with the center of the surface of the heat-expandable fire-resistant and heat-insulating paint. The flame temperature of the burner was measured with a K-type thermocouple, and the burner air hole and the fuel supply amount were adjusted so that the flame contact temperature was kept in the range of 1000 ° C. to 1050 ° C. and heated for 30 minutes. Two K-type thermocouples were installed in the center of the back surface of the evaluation sheet, and the temperature was measured. From the start of heating to 5 minutes, the temperature at the center of the back surface of the evaluation sheet was measured a total of 10 times at intervals of 5 minutes from 5 minutes after the 1 minute interval to 30 minutes after the end of heating.

Example 3 Cable fireproof and heat-insulating evaluation method of Comparative Example 5. The cable obtained in Example 3 and the cable obtained in Comparative Example 5 were installed in an electric furnace in accordance with the heating curve and load load specified by the Fire and Disaster Management Agency Notification No. 10 fireproof wire standards in 1997.

(Fire resistance evaluation criteria)
Example 1, Example 2, Comparative Example 1 to Comparative Example 4 in which there is no combustion of the sheet and the absorbent cotton due to the dropped product, △, which is the combustion of the sheet but there is no combustion of the absorbent cotton due to the dropped product, The case where there was burning of the sheet and burning of the absorbent cotton due to the dripped material was rated as x.

(Insulation evaluation criteria)
A total of 10 temperatures from the start of heating to 30 minutes after the end of heating were measured on the sheets of Example 1, Example 2, and Comparative Examples 1 to 4, and the measured temperature was the average of the measured temperatures of two installed K-type thermocouples. It was. The allowable current when the cable is short-circuited is JC0168-1 from the Japan Electrical Wire Manufacturers Association, and the allowable temperature when short-circuited is 230 ° C for crosslinked polyethylene. The following were marked with Δ, and those exceeding 230 ° C. with x. The average temperature is an average of 10 temperature measurements in total.

(Expansion layer shape retention evaluation criteria)
According to the visual confirmation of the sheets of Example 1, Example 2 and Comparative Examples 1 to 4, there is almost no drop-off scattering from the expansion layer and the expansion layer does not collapse by finger touch. The case where the expansion layer did not collapse by touch was indicated by Δ, and the case where there was drop-off scattering and the expansion layer collapsed by touch was indicated by ×.

(Cable electric furnace evaluation criteria)
The cable obtained in Example 3 and the cable obtained in Comparative Example 5 were taken out from the electric furnace after the evaluation according to the heating curve and load load defined by the Fire and Disaster Management Agency Notification No. 10 fireproof wire standards in 1997. As a result of visual confirmation, the insulating layer was deformed by a load, melted and melted and bonded between three cores, contacted with a conductor, burned with kraft paper, and with little discoloration of the conductor.

The following is for the thermally expandable fire-resistant and heat-insulating coating composition and equipment used in the evaluation.
Olester Q203: Polyurethane resin (Mitsui Chemicals)
EXP50SL: Thermally expandable graphite (Fuji Graphite Industry Co., Ltd.)
Thaien E: A mixture of ammonium polyphosphate, pentaerythritol and melamine (manufactured by Taihei Chemical Industrial Co., Ltd.)
APA-100: Thermally expandable aluminum phosphite (manufactured by Taihei Chemical Industrial Co., Ltd.)
CuO: Cupric oxide (manufactured by Nikko Rica)
FN-180D: Thermally expandable microsphere (Matsumoto Yushi Seiyaku Co., Ltd.)
Purified glycerin: (manufactured by Shin Nippon Rika Co., Ltd.)
BF200: Calcium carbonate (manufactured by Bihoku Powder Chemical Co., Ltd.)
Plain weave glass cloth: H201F107 (Made by Unitika)
Type K thermocouple: TM-902C (manufactured by Lutron)
K-type thermocouple: TM-902C (manufactured by Aideaz)
Burner: Power torch RZ-832 16mm crater flame (manufactured by Shin-Fuji burner)
Burner fuel: RZ860 liquefied propane, liquefied butane (manufactured by Shin-Fuji Burner)
Thickness gauge: ZLSY (manufactured by Enhong)

(Evaluation results)
Example 1 was good in any of fire resistance, heat insulation, and shape retention of the thermal expansion layer. The maximum temperature was 167 ° C., the average temperature was 160 ° C., and each expansion ratio was also good. In particular, an effect excellent in heat insulation was confirmed.

Although Example 2 has good fire resistance and heat insulation properties, in the shape retention of the thermal expansion layer, there was some scattering from the expansion layer due to the effect of non-combination of thermally expandable aluminum phosphite. It was confirmed that the expanded layer was good without being broken.

In Comparative Example 1, the fire resistance was good, but the maximum temperature slightly exceeded 200 ° C. and the average temperature was also high. Moreover, the scattering from an expansion layer and the shape retention force of an expansion layer are insufficient, and it is disqualified.

In Comparative Example 2, the fire resistance and each expansion ratio were good, but the expansion ratio was too high, so that the voids in the expansion layer became rough and the maximum temperature exceeded 200 ° C. Moreover, there is scattering and the shape retention of the expansion layer is insufficient, which is unacceptable.

In Comparative Example 3, fire resistance was good, but refined glycerin was not blended and the maximum temperature exceeded 200 ° C., and the average temperature was also high and some scattering was observed, but the level reached a pass.

Comparative Example 4 has good fire resistance, but since no thermally expandable microspheres are blended, porous voids are not formed in the expanded layer, and the thermal insulation evaluation criteria cannot be satisfied. The average temperature was also high. Moreover, each expansion magnification is also low and is unacceptable.

As a result of evaluating the cable electric furnace of Example 3, there was no deformation of the insulating layer, melting, fusion bonding of the three cores, and contact of the conductors in the three cores of the crosslinked polyethylene insulation. In addition, as for the internal kraft paper-mediated combustion, a slightly thin burn was observed on the front surface portion, but no burn was observed on the back surface portion. No discoloration of the conductor part of the three cores was observed, and it was confirmed that the effect was good without being affected by the load, and the evaluation was good.

The cable electric furnace evaluation results of Comparative Example 5 showed that although the three cores of the crosslinked polyethylene insulation were not large, the insulation layer was deformed and the melt adhesion of the three cores due to melting was observed. There was no contact with the conductor, but the inside of the kraft paper was carbonized and did not stay in shape. Moreover, discoloration of the conductor part of 3 cores is seen, 1 core is silver-colored and 2 remaining cores are discolored pink, and a favorable result is not obtained, and evaluation is x.

The fire-resistant and heat-insulating sheet using the heat-expandable fire-resistant and heat-insulating coating composition of Example 1 is excellent in fire resistance, heat insulation, and shape retention of the expanded layer, and exhibits particularly excellent performance in heat insulation. . In addition, it was confirmed that the cable of Example 3 using the fire-resistant and heat-insulating sheet using the same thermally expandable fire-resistant and heat-insulating paint composition as in Example 1 exhibited excellent performance.

In addition, since the heat-expandable fire-resistant and heat-insulating paint of the present invention has excellent fire-resistant and heat-insulating performance, it can be used for fire doors and for buildings and building materials in addition to cable applications.

Since the heat-expandable fire-resistant and heat-insulating paint of the present invention has excellent fire-resistant and heat-insulating performance, it can be provided for a wide range of applications related to construction other than cables.

1 Thermal expansion fireproof heat insulation paint 2 Base material sheet

Claims (4)

Resin binder, inorganic filler, thermally expandable graphite, mixture of phosphorus compound, polyhydric alcohol and melamine , copper oxide having a blending amount of 20 to 100 parts by weight with respect to 100 parts by weight of solid content of resin binder , glycerin , A heat-expandable fireproof and heat-insulating paint characterized by containing heat-expandable microspheres. The thermally expandable fire-resistant heat-insulating paint according to claim 1, wherein the thermally expandable microsphere has an average particle size of 10 to 50 µm, a maximum expansion temperature of 190 to 250 ° C, and a blending amount of 20 to 100 parts by weight. The heat-expandable fireproof heat-insulating paint according to claim 1 or 2 , further comprising heat-expandable aluminum phosphite. A fire-resistant and heat-insulating sheet for cables comprising the thermally expandable fire-resistant and heat-insulating paint according to any one of claims 1 to 3 on one side or both sides of a base sheet.

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