KR101872623B1 - Waterborne flame-retardant resin composition having conductivity and method for preparing the same - Google Patents

Waterborne flame-retardant resin composition having conductivity and method for preparing the same Download PDF

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KR101872623B1
KR101872623B1 KR1020160176765A KR20160176765A KR101872623B1 KR 101872623 B1 KR101872623 B1 KR 101872623B1 KR 1020160176765 A KR1020160176765 A KR 1020160176765A KR 20160176765 A KR20160176765 A KR 20160176765A KR 101872623 B1 KR101872623 B1 KR 101872623B1
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flame retardant
reactive
resin
content
acrylate
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KR1020160176765A
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Korean (ko)
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김도형
은명기
정용진
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(주)협진화학
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/12—Polymerisation in non-solvents
    • C08F2/16—Aqueous medium
    • C08F2/22—Emulsion polymerisation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F230/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal
    • C08F230/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing phosphorus
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/49—Phosphorus-containing compounds
    • C08K5/51—Phosphorus bound to oxygen
    • C08K5/53—Phosphorus bound to oxygen bound to oxygen and to carbon only
    • C08K5/5317—Phosphonic compounds, e.g. R—P(:O)(OR')2
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/49—Phosphorus-containing compounds
    • C08K5/51—Phosphorus bound to oxygen
    • C08K5/53—Phosphorus bound to oxygen bound to oxygen and to carbon only
    • C08K5/5317—Phosphonic compounds, e.g. R—P(:O)(OR')2
    • C08K5/5333—Esters of phosphonic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04—Homopolymers or copolymers of esters
    • C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/001—Conductive additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant

Abstract

The present invention provides a conductive aqueous flame retardant resin composition which contains an aqueous acrylic resin containing a reactive phosphorus flame retardant (P1) having a radical reactor, a non-reactive phosphorus flame retardant (P2) and conductive metal particles; and a production method of the same. Accordingly, an aqueous acrylic resin composition which is excellent in conductivity and flame retardancy, and is excellent in physical properties such as mechanical properties and appearance characteristics can be provided.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a conductive aqueous flame retardant resin composition and a method for preparing the same,

More particularly, the present invention relates to a flame retardant resin composition and a process for producing the flame retardant resin composition, and more particularly, to a process for producing a flame retardant resin composition which comprises reacting a phosphorus flame retardant having a radical reactor in an emulsion polymerization process to produce an acrylic resin, To an aqueous acrylic flame retardant resin composition having a sufficient flame retardance and conductivity by mixing non-reactive phosphorus flame retardant and conductive particles.

In general, vehicles, furniture and interior finishing materials or interior materials of buildings are made of vinyl chloride resin (PVC), polyolefin resin, or polyester resin. In order to impart surface transparency, conductivity and flame retardancy, And then coating is carried out. In the case of the flame-retardant interior material, various kinds of flame retardant are added to fabric such as vinyl chloride resin to impart flame retardancy to the fabric itself, and the pressure-sensitive adhesive applied to the back of the printing layer may also contain flame retardant components. However, when the surface is coated with a functional resin, the flame retardancy is drastically reduced by the coating layer, and even if the flame retardant fabric is used, it becomes a problem in the case of fire. Therefore, when adding a flame retardant to the functional coating layer, a conductive powder such as Al, Ni, graphite or the like and carbon nanotubes may be added in small amounts to impart conductivity to the resin in order to solve the problems caused by the generation of static electricity.

Conventionally, brominated flame retardants such as DECA (decabromodiphenylether) and TBBA (tetrabromo-bisphenol A), which are excellent in flame retardancy, have been mainly used. Recently, the use of non-halogen flame retardants has been rapidly increasing due to the controversy of harmfulness. Especially, Non-halogen flame retardants should be used. For example, a phosphorus-based flame retardant that is attracting attention as an alternative to a halogen-based flame retardant can be used. As a typical phosphorus flame retardant, phosphate ester or phosphate, phosphonate, phosphinate, phosphine oxide, can do.

For coating resins, it is required to use eco-friendly resin. For example, waterborne resin (Waterborne Resin) has been rapidly replaced by organic resin-based oil-based resin (Solvent based Acrylic or Urethane Resin). In general, water-based resins are superior to conventional oily resins in terms of environment-friendliness, but their physical properties are deteriorated. For example, there are various drawbacks such as a weak mechanical strength and a change in physical properties over time. Furthermore, in order to impart conductivity and flame retardancy, many additives such as conductive particles and flame retardants must be added. In this case, the physical properties of the water-based resin are significantly lowered. In addition, in the case of an organic flame retardant having a relatively low molecular weight as compared with a resin, migration of the surface to the surface may cause surface irregularities when exposed to water.

Korean Patent Laid-Open Publication No. 10-2015-0012662 discloses a conductive flame retardant resin composition having both conductivity and flame retardancy. The polycarbonate resin is mixed with a carbon nanotube and a fluorinated polyolefin resin, and has excellent mechanical properties, flame retardancy and conductivity A method of developing an improved resin is disclosed. Korean Patent Laid-Open No. 10-2015-0045160 discloses a flame retardant resin composition having improved flame retardancy and flexibility, which comprises a blend resin composition comprising a styrenic copolymer and a polyester-based elastomer, an epoxy resin, and a phosphorus flame retardant. However, most of these inventions improve the flame retardancy of the UV-curable resin composition or the extruded resin composition, and a water-based flame retardant resin composition having sufficient conductivity and flame retardancy as well as excellent physical properties has not been developed yet.

Korean Patent Publication No. 10-2015-0012662 Korean Patent Publication No. 10-2015-0045160

A problem to be solved by the present invention is to provide a waterborne acrylic resin composition which is excellent in conductivity and flame retardancy and also has excellent physical properties such as mechanical properties and appearance characteristics and a method for producing the same.

In order to solve the above technical problems, the present invention provides a flame retardant resin composition comprising: an aqueous acrylic resin containing a reactive phosphorus flame retardant (P 1 ) having a radical reactor; A non-reactive phosphorus flame retardant (P 2 ) and conductive metal particles. At this time, the content of the reactive phosphorylating flame retardant (P 1 ) and the non-reactive phosphorylated flame retarding agent (P 2 ) preferably satisfy the following [Expression 1] to [Expression 3].

[Equation 1] ... 10 <P '(= P 1 ' + P 2 ') <30

[Equation 2] ... (P 1 '/ P 2 ')> 1

[Equation 3] ... P 1 &lt; 10

(In the above-mentioned [Formula 1] to [Formula 3], P 1 'is the content of pure phosphorus contained in the P 1 compound with respect to 100 parts by weight of the resin solid content, P 2 ' The content of pure phosphorus contained in the P 2 compound)

The present invention also provides a method for producing an acrylic resin, comprising the steps of: a) preparing an acrylic resin by polymerizing an acrylic monomer, a methacrylate monomer, or a mixture thereof, and a reactive phosphorus flame retardant having a vinyl or acrylic reactor; And mixing the acrylic resin with a non-reactive phosphorus flame retardant and conductive metal particles.

In addition, the present invention provides a flame retardant product such as a flame retardant sheet produced using the conductive and aqueous flame retardant acrylic resin composition.

The flame retardant resin composition according to the present invention is characterized in that a phosphorus-based flame retardant having a radical polymerization reactor such as a vinyl group or an acrylic group is added to an emulsion polymerization process to copolymerize the acrylic resin, whereby the properties of the acrylic resin itself due to the flame retardant and the surface migration phenomenon It is possible to impart a sufficient flame retardancy to the resin itself without causing any problems such as cracks or the like. Further, after the completion of the polymerization of the acrylic resin, the non-reactive phosphorus flame retardant and the conductive particles are further mixed to provide an aqueous acrylic resin composition having sufficient flame retardance and conductivity and excellent physical properties.

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

The flame retardant resin composition according to the present invention comprises an aqueous acrylic resin containing a reactive phosphorus flame retardant (P 1 ) having a radical reactor; (P 2 ) and conductive metal particles, wherein the content of the reactive phosphorus flame retardant (P 1 ) and the non-reactive phosphorus flame retardant (P 2 ) satisfy the following formulas (1) to It is preferable to satisfy Expression (3).

[Equation 1] ... 10 <P '(= P 1 ' + P 2 ') <30

[Equation 2] ... (P 1 '/ P 2 ')> 1

[Equation 3] ... P 1 &lt; 10

(In the above-mentioned [Formula 1] to [Formula 3], P 1 'is the content of pure phosphorus contained in the P 1 compound with respect to 100 parts by weight of the resin solid content, P 2 ' The content of pure phosphorus contained in the P 2 compound).

In order for the resin composition according to the present invention to have flame retardant properties, the phosphorus content is important relative to the total resin weight part. When the phosphorus content P 'is less than 10, The mechanical properties of the resin are deteriorated and the production cost is increased.

Further more the reactive phosphorus flame retarder (P 1) and a non-reactive phosphorus flame retarder (P 2) the ratio of the phosphorus content contained in (P 1 '/ P 2' ) is also very important (P 1 '/ P 2' ) 1 The content of the non-reactive flame retardant which is simply mixed with the resin is increased, resulting in poor appearance (for example, water stain) of the resin surface layer after coating. The content (P 1 ') of the reactive flame retardant copolymerized in the resin should be 10 or less. If the content is larger than 10, the content of the copolymerized flame retardant is too large and the resin properties are deteriorated. Therefore, when the content of the effective phosphorus satisfies the above-mentioned [Formula 1] to [Formula 3], it is possible to provide a resin composition excellent in flame retardancy and physical properties.

The reactive phosphorus flame retardant (P 1 ) used in the flame retardant resin composition according to the present invention includes compounds represented by the following formulas.

Figure 112017124221723-pat00006

delete

In Formula 1, R 1 is hydrogen or a methyl group, R 2 may be selected from hydrogen, methyl, ethyl, n- butyl, hexyl, isooctyl, or 2-ethylhexyl group, x and y are from 1 to 10 Lt; / RTI &gt;

The reactive phosphorylated flame retardant (P 1 ) that can be used in the present invention may be a phosphate-based compound having a radical reactive group such as vinyl or acrylic group, or a phosphoamidate-based compound. Specific examples of the phosphorus- , Or diethyl (acryloyloxyethyl) phosphoamidate represented by the formula 3, but the present invention is not limited thereto.

[Chemical Formula 2] &lt; EMI ID =

Figure 112016126279479-pat00002

Examples of the non-reactive phosphorylated flame retardant (P 2 ) usable in the present invention include phosphate-based compounds, diphosphate-based compounds, polyphosphate-based compounds, phosphonate-based compounds and phosphinate-based compounds, For example, triphenylphosphine, diethylphosphoamidate, tricresyl phosphate, tri (2,6-dimethylphenyl) phosphate, tri (2,4,6-trimethylphenyl) phosphate, tetraphenylresorcinol diphosphate, Tetra (2,6-dimethylphenyl) resorcinol diphosphate, tetraphenyl bisphenol A diphosphate, and the like, but are not limited thereto. It is preferable to use triphenylphosphate, diethylphosphoamidate or a mixture thereof represented by the following formulas (4) and (5) in the production of the aqueous flame retardant resin composition.

[Chemical Formula 4]

Figure 112016126279479-pat00003

In addition, the flame retardant resin composition according to the present invention includes conductive metal particles, and even if aluminum (Al) powder is used, conductivity can be effectively imparted to the resin composition. The content of the metal particles is preferably 0.5 to 5 parts by weight based on the resin solid content. When the content of metal particles such as aluminum powder is less than 0.5, sufficient conductivity can not be given. When the content is more than 5 wt%, not only the coating property is deteriorated but also flame retardancy is deteriorated.

The method for producing a flame retardant resin composition according to the present invention comprises the steps of: preparing an acrylic resin by polymerizing an acrylic monomer, a methacrylic ester monomer or a mixture thereof, and a reactive phosphorus flame retardant having a vinyl or acrylic reactor; And mixing the acrylic resin with a non-reactive phosphorus flame retardant and conductive metal particles, and the polymerization is generally carried out through an emulsion polymerization reaction.

Examples of the monomer used in the polymerization of acrylic resin according to the present invention include acrylic monomers and methacrylic acid ester monomers. Examples of the monomers include acrylic acid, 2-ethylhexyl acrylate, methyl (meth) acrylate, Acrylate, isobutyl (meth) acrylate, butyl (meth) acrylate, hexyl (meth) acrylate, n-octyl And a mixture thereof.

In the production method according to the present invention, the step of preparing the acrylic resin may further include a crosslinking agent, an emulsifying agent, and a polymerization initiator. The cross-linking agent can be used to increase the mechanical properties of the resin. The cross-linking agent that can be used is not particularly limited. Ethylene glycol dimethacrylate divinylbenzene, 1,4-butanediol diacrylate (1 , 4-butanediol diacrylate), and the crosslinking agent is preferably added in an amount of 1 to 5 parts by weight based on 100 parts by weight of the monomer. In the present invention, emulsifiers and polymerization initiators used in emulsion polymerization can be arbitrarily used conventionally, and plasticizers, cryoprotectants, viscosity control agents and the like may be used depending on the purpose.

Meanwhile, the conductive aqueous flame retardant resin composition according to the present invention can be used for producing various flame retardant products. For example, a flame retardant sheet can be produced through a casting method.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the following examples are provided to illustrate the present invention and should not be construed as limiting the scope of the present invention.

Responsive takeover Flame retardant  Synthesis of acrylic resin containing

<Synthesis Example>

A reactor equipped with a stirrer, a thermometer and a reflux condenser was charged with 53 parts by weight of ion-exchanged water and 3 parts by weight of KH-10 (Daiichi Kogyo Seiyaku Co., Ltd.) as an anionic reactive emulsifier. 34.5 parts by weight of ion-exchanged water, 4 parts by weight of KH-10 and 50 parts by weight of methyl methacrylate, 2 parts by weight of acrylic acid, 18 parts by weight of 2-ethylhexyl acrylate, and vinylphosphonic acid (Sigma -Aldrich) were mixed to prepare a pre-emulsion, and 5% of the obtained pre-emulsion was added to the reactor. After 0.3 part by weight of benzoyl peroxide was added as a polymerization initiator to confirm that the reaction was started, the pre-emulsion was added uniformly for 4 hours to conduct emulsion polymerization. After completion of the reaction, the temperature was lowered to 65 ° C, and 0.004 part by weight of benzoyl peroxide was added. The reaction was terminated by stirring for 30 minutes. And 3.9 parts by weight of 25% ammonia water were added to obtain an aqueous acrylic resin having a pH of 8 and a solid content of 50% by weight.

Preparation of conductive aqueous flame retardant resin composition

&Lt; Example 1 >

2 parts by weight of an aluminum powder (Al powder) and 40 parts by weight of triphenylphosphate (Sigma-Aldrich), which is a non-reactive type flame retardant, were added to 200 parts by weight of the flame- Were mixed to obtain a conductive aqueous flame retardant resin composition. In this case, P 1 '= 8.6, P 2 ' = 3.8, P 1 '+ P 2 ' = 12.4, and P 1 '/ P 2 ' = 2.26.

&Lt; Example 2 >

In the above synthesis example, 40 parts by weight of methyl methacrylate, 13 parts by weight of 2-ethylhexyl acrylate, 2 parts by weight of acrylic acid, and diethyl (acryloyloxyethyl) phosphonamidate as a reactive flame retardant, phosphoramidate (manufactured by SMT Co., Ltd.) was added to prepare an aqueous emulsion resin. At this time, P 1 '= 6.3 and P 2 ' = 3.8, P 1 '+ P 2 ' = 10.1 and P 1 '/ P 2 ' = 1.64.

&Lt; Example 3 >

Was the same as Example 1 except that diethyl phosphoramidate (Sigma-Aldrich) was used as a non-reactive flame retardant. In this case, P 1 '= 8.6, P 2 ' = 8.4, P 1 '+ P 2 ' = 17.0 and P 1 '/ P 2 ' = 1.03.

&Lt; Comparative Example 1 &

In the above synthesis example, 60 parts by weight of methyl methacrylate, 18 parts by weight of 2-ethylhexyl acrylate, 2 parts by weight of acrylic acid, and 20 parts by weight of vinylphosphonic acid as a reactive flame retardant were added to synthesize an acrylic resin, And 10 parts by weight of triphenyl phosphate were mixed to prepare a conductive aqueous flame retardant resin composition. At this time, P 1 '= 5.7, P 2 ' = 1.0, P 1 '+ P 2 ' = 6.7, and P 1 '/ P 2 ' = 6.04.

&Lt; Comparative Example 2 &

In the synthesis example, 65 parts by weight of methyl methacrylate, 18 parts by weight of 2-ethylhexyl acrylate, 2 parts by weight of acrylic acid, and 15 parts by weight of vinylphosphonic acid as a reactive flame retardant were added to prepare an acrylic resin, it is the same as a triphenyl phosphate 60 parts by weight of exemplary mixed and, except to produce the conductive water-based flame-retardant resin composition of example 1. At this time, P 1 '= 4.3, P 2 ' = 5.7 and P 1 '+ P 2' = 10.0, P 1 '/ P 2 ' = 0.75.

&Lt; Comparative Example 3 &

Except that 40 parts by weight of methyl methacrylate, 8 parts by weight of 2-ethylhexyl acrylate, 2 parts by weight of acrylic acid and 50 parts by weight of vinylphosphonic acid as a reactive flame retardant were added to the above synthetic example to synthesize an acrylic resin P 1 '= P 2 ' = 3.8 and P 1 '+ P 2 ' = 18.2 and P 1 '/ P 2 ' = 3.77.

&Lt; Comparative Example 4 &

Except that 0.5 part by weight of aluminum powder was added.

&Lt; Comparative Example 5 &

Except that 10 parts by weight of aluminum powder was added.

The composition and flame retardant content of each resin used in the examples and comparative examples are shown in Table 1 below.

Figure 112016126279479-pat00004

V_P (Vinylphosphonic acid), DAEPN (diehtylacryloyloxyethyl) phosporamidate), TPP (Triphenylphosphate), DEPN (Diehtylphosphoramidate)

<Experimental Example>

The properties of the conductive flame retardant resin compositions prepared in Examples 1-3 and Comparative Examples 1-5 according to the present invention were evaluated through the following experiment, and the results are shown in Table 2.

1) Flammability

The conductive flame retardant resin composition prepared through Examples and Comparative Examples was subjected to solvent casting to prepare a sheet having a thickness of 100 micrometers. The flame retardancy of the sheet was measured using a 45 ° micro-burner method. At this time, the flame size of the burner was 45 mm, and the flame retardancy was evaluated by burning for 60 seconds. The evaluation units are represented by O and X, where O represents a residual salt time within 3 seconds and a carbonization area of 30 cm 2 , and X represents a residual salt time of 3 seconds or more or a carbonization area of 30 cm 2 or more.

2) Conductivity (surface resistance)

If the conductivity is used Wolfgang Warmbler's SRM-100, it was measured according to ASTM D257 standard surface resistance less than 10 9 when O, 10 9 or more was expressed as X.

3) Appearance characteristics

The resulting conductive aqueous flame retardant resin composition was applied to a polyester base at a thickness of 30 microns and then subjected to hot air drying. Water was dropped on the coated fabric, and the surface appearance was checked by drying. When the surface state was clean, it was marked with O and when there was irregularity, it was marked with X.

4) Resin characteristics

The resulting conductive aqueous flame retardant resin composition was stored at room temperature for 3 days, and the state of the resin was observed. When the emulsion state was good, O, and when the emulsion state was poor, X was indicated.

Flammability conductivity Surface property Resin Properties Example 1 O O O O Example 2 O O O O Example 3 O O O O Comparative Example 1 X O O O Comparative Example 2 O O X O Comparative Example 3 O O O X Comparative Example 4 O X O O Comparative Example 5 O O O X

As shown in Table 2, irrespective of the kind of the flame retardant, the content of the aluminum powder satisfying [Formula 1], [Formula 2], and [Formula 3] was 0.5 to 5 parts by weight based on the resin solid content, (P '(P 1 ' + P 2 ') = 6.70), in which the effective phosphorus content of the flame retardant is low, while the resin of Example 3 exhibits excellent electrical conductivity and flame retardancy, It can be seen that the flame retardant property is poor.

On the other hand, even when the total flame retardant content is appropriate, the surface characteristics such as the unevenness phenomenon are poor and the content of the reactive flame retardant is high (Comparative Example 2) [(P 1 '/ P 2 ') = 0.75] It can be seen that too much &lt; Comparative Example 3 &gt; results in poor properties of the resin itself. In addition, <Comparative Example 4>, in which the content of the conductive aluminum powder is too low, is poor in conductivity, and <Comparative Example 5> in which the content of the conductive aluminum powder is too large decreases the resin properties.

Claims (16)

An aqueous acrylic resin comprising a reactive phosphorus flame retardant (P 1 ) having a radical reactor selected from a vinyl group or an acrylic group; A flame retardant resin composition comprising a non-reactive phosphorus flame retardant (P 2 ) and aluminum (Al) powder as conductive metal particles,
Wherein the content of the reactive phosphorylated flame retardant (P 1 ) and the non-reactive phosphorylated flame retardant (P 2 ) satisfy the following formulas (1) to (3)
[Equation 1] ... 10 <P '(= P 1 ' + P 2 ') <30
[Equation 2] ... (P 1 '/ P 2 ')> 1
[Equation 3] ... P 1 &lt; 10
(In the above-mentioned [Formula 1] to [Formula 3], P 1 'is the content of pure phosphorus contained in the P 1 compound with respect to 100 parts by weight of the resin solid content, P 2 ' The content of pure phosphorus contained in the P 2 compound). delete delete delete The method according to claim 1,
Wherein the reactive phosphorus flame retardant (P 1 ) is selected from vinylphosphonic acid or diethyl (acryloyloxyethyl) phosphoramidate or a mixture thereof. The method according to claim 1,
The non-reactive phosphorylated flame retardant (P 2 ) is selected from the group consisting of triphenyl phosphate, diethylphosphoamidate, tricresyl phosphate, tri (2,6-dimethylphenyl) phosphate, tri (2,4,6-trimethylphenyl) phosphate , Tetraphenylresorcinol diphosphate, tetracycylresocyanurate diphosphate, tetra (2,6-dimethylphenyl) resorcinol diphosphate, tetraphenyl bisphenol A diphosphate or mixtures thereof. delete The method according to claim 1,
Wherein the content of the conductive metal particles is 0.5 to 5 parts by weight based on the solid content of the resin. A process for producing an acrylic resin by emulsion polymerization of a reactive phosphorylating flame retardant (P 1 ) having an acrylic monomer, a methacrylate ester monomer or a mixture thereof and a radical reactor selected from a vinyl group and an acrylic group, ; And
b) mixing a non-reactive phosphorus flame retardant (P 2 ) with the acrylic resin and aluminum (Al) powder as conductive metal particles,
Wherein the content of the reactive phosphorylated flame retardant (P 1 ) and the non-reactive phosphorylated flame retardant (P 2 ) satisfy the following formulas (1) to (3)
[Equation 1] ... 10 <P '(= P 1 ' + P 2 ') <30
[Equation 2] ... (P 1 '/ P 2 ')> 1
[Equation 3] ... P 1 &lt; 10
(In the above-mentioned [Formula 1] to [Formula 3], P 1 'is the content of pure phosphorus contained in the P 1 compound with respect to 100 parts by weight of the resin solid content, P 2 ' The content of pure phosphorus contained in the P 2 compound). delete 10. The method of claim 9,
Wherein the step of preparing the acrylic resin further comprises a crosslinking agent, an emulsifier, and a polymerization initiator. 10. The method of claim 9,
(Meth) acrylate, butyl (meth) acrylate, hexyl (meth) acrylate, n (meth) acrylate, (Meth) acrylate, isooctyl (meth) acrylate, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate and isononyl . 10. The method of claim 9,
Wherein the reactive phosphorus flame retardant (P 1 ) is selected from vinylphosphonic acid or diethyl (acryloyloxyethyl) phosphoramidate or a mixture thereof. 10. The method of claim 9,
The non-reactive phosphorylated flame retardant (P 2 ) is selected from the group consisting of triphenyl phosphate, diethylphosphoamidate, tricresyl phosphate, tri (2,6-dimethylphenyl) phosphate, tri (2,4,6-trimethylphenyl) phosphate , Tetraphenylresorcinol diphosphate, tetracrylisocinol diphosphate, tetra (2,6-dimethylphenyl) resorcinol diphosphate, tetraphenyl bisphenol A diphosphate, or a mixture thereof. Gt; delete A flame retardant sheet produced by using the flame retardant resin composition according to claim 1.
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