KR102465516B1 - Flame retardant adhesive composition for aluminium thin film adhesion - Google Patents

Abstract

The present invention relates to a flame retardant adhesive composition for aluminium thin film adhesion, and more particularly, the composition consists of an acrylic adhesive, a graphite powder and flame retardant additives. The adhesive composition composed of the above components not only exhibits excellent adhesive performance to the aluminum thin film, but also shows excellent flame retardant performance by containing the graphite powder and the flame retardant additives.

Description

Flame retardant adhesive composition for bonding aluminum thin films

The present invention relates to a flame retardant adhesive composition for bonding an aluminum thin film, and more particularly, to a flame retardant adhesive composition for bonding an aluminum thin film, which not only exhibits excellent adhesive performance to an aluminum thin film, but also exhibits excellent flame retardant performance by containing graphite powder and a flame retardant additive. It is about.

In the insulation of ships, automobiles and buildings, external insulation, which is a method of insulation from the outside, is evaluated as the most efficient insulation method, but its use is not widely expanded due to various disadvantages.

The first can be found in the monotony of the finishing method for external insulation. It is finished with a product of a similar combination with water-based paint mixed with different sizes of aggregate to avoid the monotony of the surface, so it is not only easily exposed to contamination, but also The second reason is that Styrofoam, which is most of the materials used for insulation pads (ie, insulation boards), is very weak against impact.

In order to overcome this, Korean Patent No. 10-0549403 is a powder type adhesive and insulation pad surface treatment mortar that is applied to a washboard-shaped insulation pad of Design No. 30-0353550 to increase the thickness of the adhesive mortar and widen the area to increase the impact Compared to the existing method of constructing surface treatment mortar on the flat insulation pad surface by selecting a method to reduce The technology used in some sites is a method designed to simplify the repair of the damaged part when part of it is damaged by impact by pre-cutting the insulation pad to a certain size smaller than the size of the existing pad and attaching it with auxiliary hardware and adhesive mortar. There are also, but these were construction methods that made it convenient to repair damaged parts rather than increasing the overall rigidity.

Accordingly, Patent No. 10-1056125 tried to solve the problem of external insulation by strengthening the insulation board to be resistant to impact by attaching an aluminum metal panel to the insulation pad, and at the same time increasing insulation performance and preventing bending of the insulation material. Cement adhesives such as Nos. 10-0586634, 10-0944221, and 10-0549403, or hot melt adhesives such as Patent No. 10-0718308, which require a mixture of cement or cement, are difficult to adhere to aluminum metal panels. Even the adhesive to which the water-based binder of No. 10-0865123 is applied is difficult to adhere to the metal plate, and it is impossible to adhere to the aluminum metal panel with the conventional adhesive technology for heat insulation pads.

In addition, conventional adhesives have a problem in that they are easily ignited by sparks generated during welding or the like due to low flame retardancy.

Korea Patent Registration No. 10-1056125 (2011.08.04.)

An object of the present invention is to provide a flame retardant adhesive composition for bonding an aluminum thin film, which not only exhibits excellent adhesive performance to an aluminum thin film, but also exhibits excellent flame retardant performance by containing graphite powder and a flame retardant additive.

An object of the present invention is achieved by providing a flame retardant adhesive composition for bonding an aluminum thin film, characterized in that it consists of an acrylic adhesive, graphite powder and a flame retardant additive.

According to a preferred feature of the present invention, the flame retardant adhesive composition for bonding an aluminum thin film is composed of 100 parts by weight of an acrylic adhesive, 2 to 5 parts by weight of graphite powder, and 5 to 10 parts by weight of a flame retardant additive.

According to a more preferred feature of the present invention, the acrylic adhesive is composed of 100 parts by weight of an alkyl acrylate monomer, 10 to 20 parts by weight of a vinyl acrylate monomer, and 5 to 15 parts by weight of an alkyl acrylic acid monomer.

According to a more preferred feature of the present invention, the graphite is made of expanded graphite having a particle size of 50 to 200 mesh.

According to an even more preferred feature of the present invention, the flame retardant additive is melamine phosphate, melamine polyphosphate, ammonium phosphate, ammonium polyphosphate, red phosphorus, tris (2-chloroethyl) phosphate, tris (1-chloro-2-propyl) Phosphate, isopropylphenyl diphenyl phosphate, triphenyl phosphate, triethyl phosphate, resorcinol diphosphate, tricresyl phosphate, dimethyl methyl phosphonate, diethyl ethyl phosphonate, dimethyl propyl phosphonate, diethyl N ,N-bis(2-hydroxyethyl)aminomethyl phosphonate, phosphonic acid, methyl(5-methyl-2-methyl-1,3,2-dioxaphosphorinan-5-yl) methyl ester P, P'-dioxide, phosphonic acid, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), poly(1,3-phenylenemethylphosphonate), hexaphenoxyte It shall consist of at least one selected from the group consisting of cyclophosphazene, phosphophenanthrene, and nitrilotris (methylphosphonamic acid).

According to a more preferred feature of the present invention, the flame retardant adhesive composition for bonding the aluminum thin film further contains 10 to 20 parts by weight of the inorganic filler and 5 to 15 parts by weight of the diluting solvent based on 100 parts by weight of the acrylic adhesive.

According to a further preferred feature of the present invention, the inorganic filler is made of calcium carbonate.

According to a more preferred feature of the present invention, the diluting solvent is one selected from the group consisting of 1,1-dichloro-1-fluoroethane, n-propyl bromide, 1,3-diolsolane, toluene and trichloroethylene It is made up of more than

The flame retardant adhesive composition for bonding an aluminum thin film according to the present invention not only exhibits excellent adhesive performance to an aluminum thin film, but also exhibits an excellent effect of providing an adhesive composition exhibiting excellent flame retardant performance by containing graphite powder and a flame retardant additive.

Hereinafter, a preferred embodiment of the present invention and the physical properties of each component will be described in detail, but this is to be explained in detail so that a person having ordinary knowledge in the art to which the present invention belongs can easily practice the invention, This is not meant to limit the technical spirit and scope of the present invention.

The flame retardant adhesive composition for bonding an aluminum thin film according to the present invention is composed of an acrylic adhesive, graphite powder, and a flame retardant additive, preferably composed of 100 parts by weight of an acrylic adhesive, 2 to 5 parts by weight of graphite powder, and 5 to 10 parts by weight of a flame retardant additive.

The acrylic adhesive is a main component of the flame retardant adhesive composition for bonding an aluminum thin film according to the present invention, and is composed of 100 parts by weight of an alkyl acrylate monomer, 10 to 20 parts by weight of a vinyl acrylate monomer, and 5 to 15 parts by weight of an alkyl acrylic acid monomer. Preferably, the acrylic adhesive composed of the above components not only exhibits excellent adhesion to the aluminum thin film, but also serves to provide an adhesive layer with excellent physical properties such as chemical resistance.

The alkyl acrylate monomer is a main component of the acrylic adhesive used in the present invention, and serves to impart adhesive strength to the adhesive.

At this time, the alkyl acrylate monomer is 2-ethylhexyl (meth) acrylate, ethyl (meth) acrylate, (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, pentyl ( meth)acrylate, n-octyl (meth)acrylate, isooctyl (meth)acrylate, isononyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, hexyl (meth)acrylate, n-nonyl (meth)acrylate, isoamyl (meth)acrylate, n-decyl (meth)acrylate, isodecyl (meth)acrylate, dodecyl (meth)acrylate, isobor It is preferably composed of at least one selected from the group consisting of nyl (meth)acrylate, cyclohexyl (meth)acrylate, phenyl (meth)acrylate, benzyl (meth)acrylate and 2-(meth)acrylate.

In addition, the vinyl acrylate monomer serves to increase the adhesive strength by acting as a crosslinking agent. When the content of the vinyl acrylate monomer exceeds 20 parts by weight, the adhesive layer becomes firm and satisfactory adhesive properties are not secured. There is, and if less than 10 parts by weight, the pressure-sensitive adhesive layer becomes flexible, and there is a concern that the initial adhesive properties for the aluminum thin film may be lowered.

In addition, the alkyl acrylic acid monomer has high polarity, so it is easy to control adhesive strength and physical properties through interaction with an adherend such as an aluminum thin film, and has excellent reactivity during addition reactions with other heterogeneous monomers and materials and chemical bonding with various functional groups. When the content of the alkyl acrylic acid monomer exceeds 15 parts by weight, there is a problem in that the initial adhesive strength of the pressure-sensitive adhesive is weakened, and when it is less than 5 parts by weight, there is a problem in that cohesion and adhesive strength decrease.

At this time, the alkyl acrylic acid monomer is methyl (meth) acrylic acid, ethyl (meth) acrylic acid, propyl (meth) acrylic acid, n-butyl (meth) acrylic acid, n-octyl (meth) acrylic acid, lauryl (meth) acrylic acid, isobutyl It is preferably composed of at least one selected from the group consisting of (meth)acrylic acid, 2-ethylhexyl (meth)acrylic acid, and isooctyl (meth)acrylic acid.

The graphite powder is contained in an amount of 2 to 5 parts by weight, serves to impart flame retardancy to the adhesive, is preferably made of expandable graphite, and is more preferably made of expandable graphite having a particle size of 50 to 200 mesh. do.

At this time, when the particle size of the expanded graphite is less than 200 mesh, agglomeration occurs between the particles and is not evenly dispersed in the adhesive composition, and when the particle size of the expanded graphite exceeds 50 mesh, the surface of the adhesive composition is not formed uniformly Otherwise, the adhesive force between the aluminum thin film and the adhesive may deteriorate.

The expanded graphite means that natural scale graphite is subjected to chemical treatment to form a graphite interlayer compound. Expanded graphite expands with chemical components when heated to form a kind of film. When heat is transferred, the film generated by the expanded graphite serves to protect the adhesive from fire, which can impart a flame retardant effect.

More specifically, looking at the general manufacturing method of expanded graphite, after mining graphite from a natural mine, manufacturing graphite through a process of grinding and water supply, washing the manufactured graphite using a strong acid, and in a high temperature and alkaline state. After sintering, graphite with a purity of 99.5% is produced through a cleaning process, and chemical products are intercalated between the graphite layers, followed by a neutralization process, followed by washing and drying.

Expanded graphite manufactured through the above process expands as gas is generated from chemicals contained between layers by heat, and the expansion initiation temperature of expanded graphite is determined according to the chemical used. It acts as an insulating layer and hinders the transfer of heat. In addition, expanded graphite is a non-halogen-type low-flammability flame retardant material that is non-toxic, lightweight, does not contain halogen components, is insoluble in water, and does not generate toxic gas.

If the content of the expanded graphite is less than 2 parts by weight, the above effect is insignificant, and if the content of the expanded graphite exceeds 5 parts by weight, the above effect is not greatly improved, but the viscosity of the adhesive composition increases excessively, resulting in workability. It is undesirable because not only the deterioration but also the deterioration of the adhesion performance to the aluminum thin film.

The flame retardant additive is contained in an amount of 5 to 10 parts by weight, and serves to ensure that the adhesive composition prepared through the present invention exhibits excellent flame retardant performance as a whole, melamine phosphate, melamine polyphosphate, ammonium phosphate, ammonium polyphosphate, red phosphorus , tris(2-chloroethyl)phosphate, tris(1-chloro-2-propyl)phosphate, isopropylphenyl diphenyl phosphate, triphenyl phosphate, triethyl phosphate, resorcinol diphosphate, tricresyl phosphate, dimethyl methyl Phosphonate, diethyl ethyl phosphonate, dimethyl propyl phosphonate, diethyl N,N-bis(2-hydroxyethyl)aminomethyl phosphonate, phosphonic acid, methyl(5-methyl-2-methyl- 1,3,2-dioxaphosphorinan-5-yl) methyl ester P,P'-dioxide, phosphonic acid, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide ( DOPO), poly(1,3-phenylenemethylphosphonate), hexaphenoxytricyclophosphazene, phosphophenanthrene, and nitrilotris (methylphosphonamic acid). desirable.

If the content of the flame retardant additive is less than 5 parts by weight, the above effect is insignificant, and if the content of the flame retardant additive exceeds 10 parts by weight, the above effect is not greatly improved and the viscosity of the adhesive composition is excessively increased to deteriorate workability. and may deteriorate the adhesion performance to the aluminum thin film.

In addition, the flame retardant adhesive composition for bonding an aluminum thin film according to the present invention may further contain 10 to 20 parts by weight of an inorganic filler and 5 to 15 parts by weight of a diluent based on 100 parts by weight of the acrylic adhesive.

10 to 20 parts by weight of the inorganic filler is contained and composed of calcium carbonate, and it is preferable to use one having an average particle size of 4 to 8 μm and an apparent specific gravity of 0.7±0.1 g/ml. When calcium carbonate having the above particle size and apparent specific gravity is contained, the viscosity of the adhesive composition prepared through the present invention is improved and serves to form an adhesive layer firmly without flowing down from the adherend. If the content is less than 10 parts by weight, the above effect is insignificant, and if the content of the inorganic filler exceeds 20 parts by weight, the adhesive strength of the adhesive to the aluminum thin film is excessively reduced, and it is difficult to form an adhesive layer with a uniform thickness. .

In addition, the diluting solvent is contained in an amount of 5 to 15 parts by weight and is at least one selected from the group consisting of 1,1-dichloro-1-fluoroethane, n-propyl bromide, 1,3-diolsolane, toluene and trichloroethylene. It is composed of, and serves to provide an adhesive composition with good workability, viscosity or curing rate.

In addition, since the graphite is evenly dispersed in the adhesive composition when the diluent is contained in the above amount, it serves to provide an adhesive composition exhibiting uniform physical properties.

If the content of the diluting solvent is less than 5 parts by weight, the above effect is insignificant, and if the content of the diluting solvent exceeds 15 parts by weight, the viscosity of the adhesive composition is excessively low, resulting in poor work performance, reduced adhesive strength, and curing This is undesirable because it slows down too much.

Hereinafter, the manufacturing method of the flame retardant adhesive composition for bonding an aluminum thin film according to the present invention and the physical properties of the adhesive composition prepared by the manufacturing method will be described with examples.

<Preparation Example 1> Preparation of acrylic adhesive

An acrylic adhesive was prepared by mixing 100 parts by weight of an alkyl acrylate monomer {2-ethylhexyl (meth)acrylate}, 15 parts by weight of a vinyl acrylate monomer, and 10 parts by weight of an alkyl acrylic acid monomer {methyl (meth)acrylic acid}.

<Example 1>

100 parts by weight of the acrylic adhesive prepared in Preparation Example 1, 3.5 parts by weight of graphite powder (50 to 200 mesh) and 8 parts by weight of a flame retardant additive (melamine phosphate) were put into a mixing device equipped with a stirrer and stirred for 30 minutes at a speed of 2000 rpm. While stirring to prepare a flame retardant adhesive composition for bonding aluminum thin film.

<Example 2>

Proceed in the same manner as in Example 1, but a flame retardant adhesive composition for bonding an aluminum thin film was prepared by mixing 2 parts by weight of graphite and 5 parts by weight of a flame retardant additive.

<Example 3>

In the same manner as in Example 1, a flame retardant adhesive composition for bonding an aluminum thin film was prepared by mixing 5 parts by weight of graphite and 10 parts by weight of a flame retardant additive.

<Example 4>

Proceed in the same manner as in Example 1, but using expanded graphite instead of graphite to prepare a flame retardant adhesive composition for bonding aluminum thin films.

<Example 5>

Proceed in the same manner as in Example 2, but using expanded graphite instead of graphite to prepare a flame retardant adhesive composition for bonding aluminum thin films.

<Example 6>

Proceed in the same manner as in Example 3, but using expanded graphite instead of graphite to prepare a flame retardant adhesive composition for bonding aluminum thin films.

<Comparative Example 1>

100 parts by weight of the acrylic adhesive prepared in Preparation Example 1, 0.5 parts by weight of graphite powder (50 to 200 mesh), and 1 part by weight of a flame retardant additive (melamine phosphate) were put into a mixing device equipped with a stirrer and stirred for 30 minutes at a speed of 2000 rpm. While stirring to prepare a flame retardant adhesive composition for bonding aluminum thin film.

<Comparative Example 2>

100 parts by weight of the acrylic adhesive prepared in Preparation Example 1, 10 parts by weight of graphite powder (50 to 200 mesh) and 20 parts by weight of a flame retardant additive (melamine phosphate) were put into a mixing device equipped with a stirrer and stirred for 30 minutes at a speed of 2000 rpm. While stirring to prepare a flame retardant adhesive composition for bonding aluminum thin film.

The flame retardancy of the adhesive compositions prepared in Examples 1 to 6 and Comparative Examples 1 to 2 was measured and shown in Table 1 below.

{However, the flame retardancy performance is determined by applying a certain amount (250 g / ㎡) of the prepared adhesive composition between aluminum thin films of 0.5 mm thickness, drying, and then in a simple fire resistance test furnace in the furnace specified in KSF2257-1 (fire resistance test method for building structural members) A flame was applied while adjusting the temperature conditions, and a hole was formed in the specimen to measure the flame passage time. The flame passage test standard is 60 minutes.}

<Table 1>

As shown in Table 1, Examples 1 to 6 and Comparative Example 2 of the present invention were found to satisfy all of the flame penetration test standards. However, it can be seen that Comparative Example 1 does not satisfy the flame penetration test standard.

In addition, the adhesive performance of the adhesive compositions prepared in Examples 1 to 6 and Comparative Examples 1 to 2 was measured and shown in Table 2 below.

{However, the adhesive performance was measured based on the measurement conditions of MS715-32 after applying a certain amount (250 g / m 2) of the prepared adhesive composition between 0.5 mm thick aluminum thin films and drying.}

<Table 2>

As shown in Table 2, it can be seen that the adhesive compositions prepared through Examples 1 to 6 of the present invention exhibit excellent adhesive performance. However, in Comparative Example 2, it was found that the adhesive force did not satisfy the standard value.

Therefore, the flame retardant adhesive composition for bonding an aluminum thin film according to the present invention not only exhibits excellent adhesive performance to an aluminum thin film, but also provides an adhesive composition exhibiting excellent flame retardant performance by containing graphite powder and a flame retardant additive.

Claims (8)

Made of acrylic adhesive, graphite powder and flame retardant additives,
The acrylic adhesive is a flame retardant adhesive composition for bonding an aluminum thin film, characterized in that consisting of 100 parts by weight of an alkyl acrylate monomer, 10 to 20 parts by weight of a vinyl acrylate monomer and 5 to 15 parts by weight of an alkyl acrylic acid monomer.
The method of claim 1,
The flame retardant adhesive composition for bonding an aluminum thin film comprises 100 parts by weight of an acrylic adhesive, 2 to 5 parts by weight of graphite powder, and 5 to 10 parts by weight of a flame retardant additive.
delete According to claim 1 or 2,
The graphite is a flame retardant adhesive composition for bonding aluminum thin films, characterized in that made of expanded graphite having a particle size of 50 to 200 mesh.
According to claim 1 or 2,
The flame retardant additive is melamine phosphate, melamine polyphosphate, ammonium phosphate, ammonium polyphosphate, red phosphorus, tris (2-chloroethyl) phosphate, tris (1-chloro-2-propyl) phosphate, isopropylphenyl diphenyl phosphate, tri Phenyl phosphate, triethyl phosphate, resorcinol diphosphate, tricresyl phosphate, dimethyl methyl phosphonate, diethyl ethyl phosphonate, dimethyl propyl phosphonate, diethyl N,N-bis(2-hydroxyethyl ) aminomethyl phosphonate, phosphonic acid, methyl (5-methyl-2-methyl-1,3,2-dioxaphosphorinan-5-yl) methyl ester P, P'-dioxide, phosphonic acid, 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), poly(1,3-phenylenemethylphosphonate), hexaphenoxytricyclophosphazene, phosphophenanthrene, A flame retardant adhesive composition for bonding an aluminum thin film, characterized in that it consists of at least one selected from the group consisting of nitrilotris (methylphosphonamic acid).
The method of claim 2,
The flame retardant adhesive composition for bonding an aluminum thin film further contains 10 to 20 parts by weight of an inorganic filler and 5 to 15 parts by weight of a diluent based on 100 parts by weight of the acrylic adhesive.
The method of claim 6,
The inorganic filler is a flame retardant adhesive composition for bonding an aluminum thin film, characterized in that consisting of calcium carbonate.
The method of claim 6,
The diluting solvent is an aluminum thin film adhesion, characterized in that consisting of at least one selected from the group consisting of 1,1-dichloro-1-fluoroethane, n-propyl bromide, 1,3-diolsolane, toluene and trichloroethylene flame retardant adhesive composition.