KR102270889B1 - Complex insulation - Google Patents

Abstract

The present invention relates to a composite heat insulating material, and more particularly, to a composite heat insulating material having excellent thermal insulation, heat insulation and sound insulation effects, and at the same time excellent durability.

Description

Composite insulation

The present invention relates to a composite heat insulating material, and more particularly, to a composite heat insulating material having excellent thermal insulation, heat insulation and sound insulation effects, and at the same time excellent durability.

In general, fiber members such as glass wool and mineral wool to reduce the transmission of vibration and noise generated in automobiles, ships, internal and external walls of buildings, and internal and external pipes of buildings, etc. material), urethane foam, and foamable synthetic resins such as sponges are used.

However, in the case of these conventional dustproof, soundproofing and insulating materials, there have been cases where there have been restrictions in their use due to the generation of toxic substances or safety reasons. In particular, in the case of expandable synthetic resins such as urethane foams, because they are combustible, harmful toxic substances are generated during manufacturing or fire, and in the case of vitrified fibers such as glass wool, glass microfibers scatter when used due to low mechanical strength, and this causes work there were difficulties

In particular, the conventional soundproofing material was effective in reducing noise generated from a noise source due to a structure having sound absorption properties when applied to automobiles, ships, interior and exterior walls of buildings, and internal and external piping of buildings. However, in the case of sound insulation and/or vibration suppression for blocking noise and/or vibration generated from a noise source from reaching an adjacent space, in most cases, the effect of the conventional soundproofing material is not sufficient.

Therefore, there is a demand for the development of an insulating material having excellent thermal insulation performance, flame retardancy performance, and noise/vibration blocking performance without generating toxic substances harmful to the human body. On the other hand, there is a risk that the durability due to frequent vibration is significantly reduced in the application where vibration occurs. Therefore, there is an urgent need to develop an insulating material having the above-described effects and durability that can maintain and sustain these effects for a long period of time.

Registered Patent Publication No. 10-0752266

The present invention has been devised in view of the above points, and the purpose of the present invention is to provide a composite insulation material having excellent thermal insulation performance, flame retardant performance, noise/vibration blocking performance, sound insulation performance, and durability that can be maintained for a long period of time. have.

In order to solve the above problems, the present invention is a first flame-retardant sponge attached to the adhesion surface, and at least two members provided on the first flame-retardant sponge and having an air layer therein are stacked and integrally fixed between the members. It provides a composite insulator including a laminate member.

According to an embodiment of the present invention, it may further include a second flame-retardant sponge disposed on the stacking member.

According to another embodiment of the present invention, it may further include a second flame-retardant sponge disposed on the stacking member, and a finishing member disposed on the second flame-retardant sponge.

According to another embodiment of the present invention, the lamination member may be integrally fixed between the members through thermal fusion between the members or an adhesive including a polyurethane-based adhesive component.

According to another embodiment of the present invention, the polyurethane-based adhesive composition comprises 50 to 70% by weight of a diisocyanate component containing 1,6-hexamethylene diisocyanate, and polyethylene glycol having a weight average molecular weight of 1200 to 1500. 30 to 50% by weight of the polyol component may include a urethane prepolymer and polypropylene oxide triol produced by reaction.

According to another embodiment of the present invention, the urethane prepolymer further includes a polyester polyol as a polyol component, and the polyester polyol includes an acid component including terephthalic acid and ethylene glycol, neopentyl glycol and trimethylol propane. It may be a poly(tetramethylene ether) glycol (PTMG) polycondensation of an ester compound in which a diol component has been reacted.

According to another embodiment of the present invention, the polyester polyol may be included in an amount of 15 to 25 parts by weight based on 100 parts by weight of polyethylene glycol.

The composite insulator according to the present invention has excellent thermal insulation performance, flame retardant performance, noise/vibration blocking performance, and soundproofing performance. , can be widely used for interior and exterior walls of buildings, interior and exterior piping of buildings, etc.

1 is a perspective view of a composite insulator according to an embodiment of the present invention.
2 is a side view of a composite insulator according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

The composite heat insulating material according to the present invention includes a first flame-retardant sponge 10 attached to an adhesion surface, and at least two members 51 provided on the rubber sheet and having an air layer therein, and integrally between the members. It is implemented including a fixed lamination member (50).

The first flame-retardant sponge 10 is a layer that is in contact with the surface to which the composite insulation is applied, for example, the ceiling of a car, the wall of a machine room of a ship, and the inner and outer walls of a building. In the case of a known flame-retardant sponge used for insulation It can be used without limitation. The first flame-retardant sponge 10 may be dried by impregnating the sponge with a flame-retardant solution. A sponge having flame retardant performance has the advantage of preventing flame propagation when a fire occurs, and is advantageous in expressing effects such as heat insulation, sound insulation, and sound insulation according to the porous structure of the sponge itself. The thickness of the first sponge may be 0.5 to 150 mm, but is not limited thereto.

Next, the stacking member 50 in which at least two members 51 are stacked on the above-described first flame-retardant sponge 10 is disposed. The main purpose of the stacking member 50 is to improve sound insulation and thermal insulation performance through the air layer provided inside the member 51 . The member 51 may be an aluminum foil layer with an air layer. The member 51 includes, for example, a support member having a partition wall therein to form an empty space having a shape of a honeycomb, a circle, an oval, etc., and encloses the outside of the support member 55 and seals the outside air. In the case of a well-known finishing member in the form of a set type, it can be used without limitation. In addition, the air layer 56 inside the member 51 may be formed in the empty space.

The member 51 may have a thickness of 0.5 to 100 mm in one layer, but is not limited thereto.

On the other hand, at least two of the above-described members 51 are vertically stacked to form a laminated member 50 fixed integrally, and each layer may be fixed through a bonding layer 60 formed of heat sealing or adhesive. have. If there is a non-adhesive portion between the members 51, the separation may increase due to frequent vibration of the portion, and there is a fear that noise may be generated due to friction of the separation portion during vibration.

The bonding layer 60 formed through the thermal fusion may be formed of a known hot melt material, and may be, for example, a hot melt powder or a hot melt film. In addition, the material of the hot-melt material may be a known hot-melt material, for example, may be a low-melting-point polyester or low-melting polyolefin resin. On the other hand, the hot melt material can form a bonding layer through heat or ultrasonic waves.

Meanwhile, the bonding layer 60 may be formed through an adhesive. As the adhesive, a known adhesive used for adhesion between the finishing members 90, for example, a polyurethane-based, acrylic-based, polyester-based, or epoxy-based adhesive may be used. However, it is preferable to use a polyurethane-based adhesive in order to have excellent weather resistance, particularly water resistance, to prevent cracking or weakening of adhesive strength due to frequent vibrations, and to minimize deterioration in adhesive performance due to heat.

As the polyurethane-based adhesive, known components known to be excellent in water resistance and heat resistance may be used without limitation. However, in order to significantly express adhesion durability in an environment where external forces such as frequent vibration are constantly applied in addition to water resistance and heat resistance, preferably 50 to 70 wt% of a diisocyanate component containing 1,6-hexamethylene diisocyanate, and A polyurethane-based adhesive composition comprising a urethane prepolymer and polypropylene oxide triol produced by reacting 30 to 50% by weight of a polyol component containing polyethylene glycol having an average molecular weight of 1200 to 1500 may be used.

In this case, the diisocyanate component forming the urethane prepolymer is methylenediphenyl diisocyante (MDI), p-phenylene diisocyanate (PPDI), toluene diisocyanate in addition to 1,6-hexamethylene diisocyanate. Isocyanate (toluene diisocyanate, TDI), 1,5-naphthalene diisocyanate (NDI), isophoron diisocyanate (IPDI), cyclohexylmethane diisocyanate (H12MDI), xy It may further include any one or more of Xylene diisocyanate (XDI), Norbornane diisocyanate (NBDI), and Trimethyl hexamethylene diisocyanate (TMDI), and more improved at high temperature In terms of the expression of adhesive performance, it is preferable to further include 1,5-naphthalene diisocyanate, more preferably 1,6-hexamethylene diisocyanate and 1,5-naphthalene diisocyanate 1:0.2 to 0.4 It is good to include it by weight ratio. If the weight of 1,5-naphthalene diisocyanate is less than 0.2 weight ratio, it may be difficult to achieve the desired improved adhesion at high temperature, and if the weight of 1,5-naphthalene diisocyanate is provided in excess of 0.4 weight ratio In a situation where frequent vibration is applied, the adhesive layer formed by curing through the polyurethane adhesive composition may be broken, and there is a fear that the peeling of the lamination member may be accelerated.

In addition, the polyol forming the urethane prepolymer may include polyethylene glycol having a weight average molecular weight of 1200 to 1500. When the weight average molecular weight is less than 1200, adhesion and water resistance may be reduced, and when the weight average molecular weight exceeds 1500 In this case, it may be difficult to achieve the object of the present invention, such as a decrease in coating properties and a decrease in adhesion durability in an environment with vibration.

According to an embodiment of the present invention, the polyol may further include a polyester polyol. Polyester polyol may weaken water resistance, but has the advantage of further improving adhesion durability in a harsh environment where frequent vibrations are applied. The polyester polyol may be a poly(tetramethylene ether) glycol (PTMG) polycondensed with an ester product in which an acid component containing terephthalic acid and a diol component containing ethylene glycol, neopentyl glycol and trimethylol propane are reacted. .

In addition to terephthalic acid, the acid component may further include a known polyhydric carboxylic acid or aliphatic polyvalent carboxylic acid. However, since the aliphatic polyhydric carboxylic acid may reduce water resistance, it is preferable to include only the aromatic polyvalent carboxylic acid. Considering the cost, only terephthalic acid is used. it is preferable

In addition, the diol component includes 15 to 25 mol% of neopentyl glycol and 5 to 10 mol% of trimethylol propane based on the total moles of the diol component, and may include ethylene glycol as the balance. When neopentyl glycol and trimethylol propane satisfy the above content range, improved heat resistance and adhesion are expressed, and when the content is out of the range, it is difficult to achieve the desired level of heat resistance and adhesion, or there is a risk that the water resistance may be significantly reduced.

The acidic component and the diol component are esterified in a molar ratio of 1: 0.9 to 1.1 to form an ester compound, and the formed ester compound is poly(tetramethylene ether) glycol (PTMG) and polycondensed to form a polyester polyol can do. In this case, poly(tetramethylene ether) glycol is preferably included in an amount of 20 to 30% by weight based on the weight of the ester compound. If poly (tetramethylene ether) glycol is included in an amount of less than 20% by weight, water resistance may be reduced, and if it exceeds 30% by weight, the adhesive strength is lowered, and there is a risk that the adhesive layer implemented by frequent vibration may be broken.

The above-described polyester polyol may be included in an amount of 15 to 25 parts by weight based on 100 parts by weight of polyethylene glycol. When this range is satisfied, excellent adhesion durability is simultaneously expressed even under poor conditions such as improved adhesion, heat resistance, water resistance, and frequent vibration. can be beneficial to

The above-described diisocyanate component and polyol component may be included in the urethane prepolymer in an amount of 50 to 70% by weight and 30 to 50% by weight, respectively, and the number average molecular weight of the prepared urethane prepolymer may be 3500 to 6000, through which the present invention It may be more advantageous to achieve the purpose of The diisocyanate component and the polyol component can be prepared as a urethane prepolymer using a known polymerization method used for preparing a polyurethane-based adhesive, so the present invention relates to specific methods, conditions, catalysts that can be added during polymerization, etc. do not limit In addition, the method for producing a polyester polyol among polyols may also be performed by a conventional method for producing polyester, and accordingly, in the present invention, detailed descriptions of specific methods, conditions, and catalysts that may be added during polymerization are omitted.

On the other hand, the above-mentioned urethane prepolymer is cross-linked with polypropylene oxide triol to form a polyurethane-based adhesive component. In contrast to cross-linking with other types of polyols, such as propylene glycol, adhesion durability in an environment where vibration and heat are applied It may be advantageous to express the desired effect of the present invention, etc. At this time, the urethane prepolymer and the polypropylene oxide triol may be included in a weight ratio of 1: 0.7 to 1.0, which may be more advantageous in achieving the object of the present invention. On the other hand, the crosslinking reaction can be carried out for 10 minutes to 10 hours at a temperature of 30 to 100° C., and the temperature conditions and time can be appropriately adjusted by adding a curing accelerator that promotes the crosslinking reaction. The curing accelerator is, for example, potassium oleate, tetra-2-ethyl-hexyltitanate, tin(IV) chloride (Tin(IV) chloride), iron(III) chloride (Iron(III) Chloride), dibutyltin dilaurate (DBTL), zinc-naphthenate (Zn-naphthenate), lead-naphthenate (Pb-naphthenate), cobalt-naphthenate (Co-naphthenate), calcium- Naphthenate (Ca-naphthenate), triethylamine (TEA), NN-diethylcyclohexylamine (N,N-diethylcyclohexylamine), 2,6-dimethylmorphorine (2,6-dimethylmorphorine), triethylene Diamine (DABCO, triethylene diamine), dimethylamino ethyl adipate, diethylethanolamine, N,N-dimethylbenzyl amin, DBU (1,8-Diazabicyclo) [5.4.0]undec-7-ene), DBN (1,5-Diazabicyclo[4.3.0]non-5-ene), etc. can be used one or two or more kinds. In this case, the curing accelerator may be included in an amount of 5 to 10% by weight based on the total weight of the above-described urethane prepolymer and polypropylene oxide triol.

On the other hand, a separate adhesive layer is provided between the above-described lamination member 50 and the first flame-retardant sponge 10 so that the two members can be integrated with each other. The adhesive layer (not shown) may be a known adhesive layer, and may be implemented through a flame retardant adhesive containing a flame retardant component. Alternatively, the adhesive layer may be implemented through the same method and material as the bonding layer used in the above-described lamination member.

In addition, a second flame-retardant sponge 70 may be further provided on the above-described stacking member 50 . The second flame-retardant sponge 70 may be used without limitation in the case of a known flame-retardant sponge used for the finishing member, and may be manufactured by impregnating the sponge with a flame-retardant component. In addition, the second flame-retardant sponge 70 may be of the same kind as the above-described first flame-retardant sponge 10, or a different material of the sponge and/or a different type of impregnated flame retardant component. In addition, the second flame-retardant sponge 70 may be thicker than the above-described first flame-retardant sponge 10 . The second flame-retardant sponge 70 reduces the external impact applied to the stacking member 50 to prevent breakage and damage of the stacking member, while further adding the effects of sound insulation, sound insulation, and heat insulation to the composite insulation material. have. The second flame-retardant sponge 70 may have a thickness of 0.5 to 200 mm, but is not limited thereto. In addition, an adhesive layer is provided between the second flame-retardant sponge 70 and the lamination member 50 so that the two members can be integrated with each other. The adhesive layer may be implemented with a known adhesive, and may be implemented through a flame retardant adhesive containing a flame retardant component. Alternatively, the adhesive layer may be implemented through the polyurethane-based adhesive used in the above-described lamination member.

Meanwhile, a finishing member 90 may be further disposed on the second flame-retardant sponge 70 . The finishing member 90 is made of, for example, industrial aluminum foil and glass yarn, and may have a thickness of 0.2 to 1 mm, and may be, for example, 0.4 mm.

In addition, the finishing member 90 may be at least one of a fabric and a leather. Through this, the finishing member 90 can be excellent in preventing flame propagation, and can form a splendid appearance. In addition, the finishing member 90 may be finished with leather, and at this time, the leather may be perforated.

The present invention will be described in more detail through the following examples, but the following examples are not intended to limit the scope of the present invention, which should be construed to aid understanding of the present invention.

<Example 1>

A first flame-retardant sponge having a thickness of 100 mm, two members having a thickness of 25 mm and an aluminum foil layer having an air layer therein, and a second flame-retardant sponge having a thickness of 100 mm were prepared.

After that, the polyurethane-based adhesive composition prepared in the following preparation example is applied to the upper surface of the member, and the remaining members are laminated to prepare a laminated member cured at 40° C. for 8 hours, and then the first flame-retardant sponge, the laminated member, the second 2 Laminated in the order of flame-retardant sponges, the polyurethane-based adhesive composition prepared in the following preparation example was interposed between each member and cured under the same conditions to implement a composite insulation material as shown in Table 1 below.

* Preparation example of polyurethane adhesive composition

First, a urethane prepolymer was prepared. Specifically, 35 parts by weight of polyethylene glycol having a weight average molecular weight of 1200 to 1500 was added to a three-neck flask, and then nitrogen gas was added. Next, 65 parts by weight of 1,6-hexamethylene diisocyanate was added, heated to about 63° C., stirred, and maintained for about 5 hours. Thereafter, the reaction was terminated when the isocyanate group was measured to be about 17.5%, thereby obtaining a urethane prepolymer having a number average molecular weight of about 4000.

Thereafter, the prepared urethane prepolymer and polypropylene oxide triol are mixed in a weight ratio of 1: 0.8, and 1% by weight of triethylamine and 1% by weight of dibutyl tin dilaurate (DBTL) are further mixed based on the total weight of these, MEK was added as a solvent and stirred to prepare a polyurethane-based adhesive composition.

<Examples 2 to 7>

It was prepared in the same manner as in Example 1, but by changing the composition of the polyurethane-based adhesive composition of the preparation example as shown in Table 1 below, a composite insulating material as shown in Table 1 was prepared.

At this time, in the case of Example 4, when the urethane prepolymer was prepared, 20 parts by weight of a polyester polyol was mixed with polyethylene glycol as a polyol with respect to 100 parts by weight of polyethylene glycol and used. At this time, the polyester polyol is added to the ester reactor in a molar ratio of 1:1 with a diol component consisting of an acid component of terephthalic acid (TPA), 15 mol% of neopentyl glycol, 5 mol% of trimethylol propane, and the remaining amount of ethylene glycol based on the diol component. After preparing an ester compound by reaction at a temperature of 250° C. in a conventional manner, poly(tetramethylene ether) glycol (PTMG) having an average weight molecular weight of 3400 was added so as to be 20% by weight based on the weight of the prepared ester compound. After that, the temperature was raised to 285° C. and polycondensation was used while gradually reducing the pressure so that the final degree of pressure reduction was 1.0 Torr or less, and the number average molecular weight of the finally prepared urethane prepolymer was about 5050.

In addition, in the case of Example 5, a polyester polyol was prepared in the same manner as in Example 4, but after preparing an ester compound, without adding PTMG, the temperature was raised to 285° C. while gradually decompressed so that the final degree of decompression was 1.0 Torr or less, and One prepared by polycondensation was used, and the number average molecular weight of the finally prepared urethane prepolymer was about 4230.

In addition, in the case of Example 7, a commercially available epoxy adhesive (AR-16 two-component adhesive) was used instead of the polyurethane-based adhesive.

<Experimental example>

The following physical properties were evaluated for the composite insulation material of Examples, and the results are shown in Table 1 below.

1. Water resistance

After cutting the prepared composite insulation material into specimens each having a width and length of 10 cm, 100 specimens for each example were prepared. Afterwards, the prepared specimens were left for 1000 hours at a humidity of 80RH% and a temperature of 80°C. Thereafter, ten experts evaluated the adhesion state of each layer of the specimens, and counted the number of specimens in which delamination or partial lifting occurred. The larger the counted number, the worse the water resistance.

2. Adhesive durability evaluation

Adhesive durability was evaluated after the composite insulating material was applied to the surface to which frequent vibration and heat were applied. Specifically, the prepared composite insulation material was cut into specimens measuring 10 cm in width and length, respectively, and 100 specimens for each example were prepared. Then, the first flame-retardant sponge of each specimen is attached to the iron plate through which the generated vibration can be well propagated through an adhesive, and the adhesive used in this case was the same as the adhesive used in each example. After that, a PTC element and a vibrator were installed in the center of the steel plate and vibration was applied for 1000 hours. At this time, the PTC device was heated to about 60 ℃. After evaluation, 10 experts evaluated the adhesion state of each layer of the specimens or the adhesion state of the iron plate and the composite insulation material, and the number of specimens that had delamination or partial lifting, peeling or partial lifting from the iron plate was counted. The larger the counted number, the worse the adhesion durability in an environment with vibration and heat.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Urethane prepolymer diisocyanate HDI HDI HDI HDI HDI HDI Epoxy adhesive polyol PEG1350 PEG1350 PEG1350 PEG1350 100 parts by weight /
20 parts by weight of polyester polyol A PEG1350 100 parts by weight /
20 parts by weight of polyester polyol B PEG3000 100 parts by weight /
20 parts by weight of polyester polyol Polypropylene oxide triol (weight ratio based on the weight of urethane prepolymer) 0.8 0 0 0.8 0.8 0.8 Polypropylene glycol (weight ratio based on the weight of urethane prepolymer) 0 0.8 0 0 0 0 Composite insulation material properties water resistance 3 5 23 4 10 2 20 Adhesive durability 17 35 60 One 10 33 91

As can be seen from Table 1, it can be confirmed that Examples 1 to 6 using the polyurethane adhesive are excellent in water resistance and adhesive durability compared to Example 7 using the epoxy adhesive.

1: composite insulation 10: first flame retardant sponge
50: stacking member
51: aluminum foil 55: support member
57: air layer 60: adhesive
70: second flame retardant sponge 90: finishing member

Claims (7)

A first flame-retardant sponge attached to the skin adhesion surface; and
It is provided on the first flame-retardant sponge, at least two members having an air layer therein are stacked, and a stacking member integrally fixed between the members,
The lamination member is integrally fixed between the members through thermal fusion between the members or an adhesive containing a polyurethane-based adhesive component,
The polyurethane-based adhesive component is 50 to 70% by weight of a diisocyanate component containing 1,6-hexamethylene diisocyanate and 30 to 50% by weight of a polyol component containing polyethylene glycol having a weight average molecular weight of 1200 to 1500. Formed by crosslinking the resulting urethane prepolymer and polypropylene oxide triol,
The urethane prepolymer is a polyol component, and further includes a polyester polyol, and the polyester polyol is an esterified compound in which an acid component containing terephthalic acid and a diol component containing ethylene glycol, neopentyl glycol and trimethylol propane are reacted with a poly (Tetramethylene ether) Glycol (PTMG) is a composite insulation, characterized in that the condensation. According to claim 1,
Composite insulator, characterized in that it further comprises a second flame-retardant sponge disposed on the stacking member. According to claim 1,
A second flame-retardant sponge disposed on the stacking member, the composite heat insulating material further comprising a finishing member disposed on the second flame-retardant sponge. delete delete delete According to claim 1,
The polyester polyol is a composite insulation material, characterized in that it is included in an amount of 15 to 25 parts by weight based on 100 parts by weight of polyethylene glycol.

Images