KR101534954B1 - Flame retardant styrenic resin without halogen flame retardants - Google Patents

Abstract

The present invention is characterized by comprising (A) a base resin made of a styrene-based resin and (B) a modified epoxy resin, wherein the external candle flame ignition is a non-halogen flame-retardant styrene- Lt; / RTI >

Description

FIELD OF THE INVENTION [0001] The present invention relates to a flame retardant styrene-

The present invention relates to a non-halogen flame retardant styrene resin composition, and more particularly, to a non-halogen flame retardant styrene resin composition which comprises (A) an external candle flame ignition including a styrenic resin and a modified epoxy resin (B) Flame retardant styrene resin composition.

Generally, acrylonitrile-butadiene-styrene (ABS) resin is widely used in electric, electronic products and office equipment due to stiffness and chemical resistance of acrylonitrile, butadiene and styrene processability and mechanical strength. Is widely used as an exterior material. However, the ABS resin itself has a characteristic of being easily combustible, and thus has little resistance to fire.

Because of these problems, ABS resin used in electrical and electronic products and office equipment should meet the flame retardant standard to ensure the safety of electric and electronic products against fire.

A method of imparting flame retardancy to a rubber-modified styrenic resin includes polymerization of a flame-retardant monomer to prepare a rubber-modified styrenic resin, and a method of mixing a flame retardant and a flame retardant additive in a rubber-modified styrenic resin. Halogen-based flame retardants such as phosphorus-based, nitrogen-based, and hydroxyl-based flame retardants. Examples of the flame retarding additives include antimony compounds, zinc compounds, and polysiloxane compounds. However, when a halogen-based flame retardant is added, corrosive toxic gases such as HBr and HCl are generated due to the high temperature and pressure generated when the ABS resin is processed, thereby adversely affecting the working environment and the human body. This is also a problem that occurs in the combustion process of the ABS resin including the halogen-based flame retardant.

Therefore, studies for solving the above problems have been actively carried out, and among them, the use of phosphorus flame retardants has received the greatest attention in terms of environment, efficiency and cost.

However, the phosphorus flame retardant must be overcharged compared to the halogen flame retardant, and since the flame retardancy due to the solid phase reaction is mainly shown, when the base resin is difficult to form a char, a char former must also be excessively injected. In this process, the physical properties of the base resin can be greatly impaired, so that a technique for minimizing the input amount of phosphorus flame retardant and char former is needed.

On the other hand, there is a UL94 vertical burning test method for the flame retardance standard and the flame retardancy discrimination test method, but this is a regulation for judging the flame resistance from the internal ignition due to short circuit, short circuit, short, etc. of the circuit board in the electronic product. In contrast, the external candle flame ignition (IEC TS 62441), which is standardized, is based on the assumption that an external ignition source, such as a candle, .

In the case of the external candle flame ignition standard, since it is all combustible materials to be covered by the standard, it is a wider range of flame retardant standards, and it is assumed that a fire that can occur in the house is transmitted, It is a flame retardant specification.

SUMMARY OF THE INVENTION An object of the present invention is to provide a flame retardant styrene resin composition which passes the flame retardant IEC TS 62441 of an external candle flame ignition while reducing the introduction of a non-halogen flame retardant into a styrene resin.

Another object of the present invention is to provide a styrene-based resin which is based on a non-halogen flame retardant compound and which has a flame retardancy sufficient to pass the flame retardant IEC TS 62441 of an external candle flame ignition Flame retardant styrene resin composition.

The above object of the present invention can be achieved by the present invention described below.

In order to achieve the above object, the present invention provides a non-halogen flame retardant styrene resin composition, which comprises (A) a styrene resin as a base resin and (B) a modified epoxy resin.

The modified epoxy resin (B) is characterized by containing a repeating unit containing an epoxy group, a repeating unit containing phosphorus and a repeating unit containing a urethane group.

The repeating unit containing the epoxy group is not particularly limited when it is a repeating unit of a conventional epoxy resin. For example, it may be a repeating unit derived from an o-cresol novolac monomer. In this case, the flame retarding efficiency is excellent.

The repeating unit containing the phosphorus is, for example, a repeating unit formed by reacting a part of the repeating unit containing the epoxy group with a phosphorus compound having a functional group.

The functional group is, for example, a reactive group capable of reacting with an epoxy group to form a covalent bond.

As the repeating unit containing the urethane group, for example, a part of the repeating unit containing the epoxy group is a repeating unit produced by reacting with a reaction product with an isocyanate compound and a polyol.

The isocyanate compound may be, for example, a diisocyanate compound. In this case, the flame retardant efficiency is excellent.

The modified epoxy resin (B) is, for example, a urethane-modified epoxy resin modified with a phosphorus compound.

The modified epoxy resin (B) has a phosphorus content of 0.5 to 6% by weight.

The modified epoxy resin (B) has an epoxy equivalent of 400 to 2000 g / eq.

The modified epoxy resin (B) has a softening point of 60 to 120 ° C.

The non-halogen flame retardant styrene resin composition includes (A) 1 to 30 parts by weight of a modified epoxy resin (B) per 100 parts by weight of the styrene resin.

Examples of the styrenic resin (A) include acrylonitrile-butadiene-styrene (ABS) copolymer, styrene-acrylonitrile (SAN) copolymer, polystyrene (PS) copolymer, high impact polystyrene And a mixture thereof.

The styrene-based resin (A) is, for example, characterized by containing 10 to 90% by weight of an acrylonitrile-butadiene-styrene (ABS) copolymer and 10 to 90% by weight of a styrene- acrylonitrile (SAN) .

The acrylonitrile-butadiene-styrene (ABS) copolymer is prepared, for example, by emulsion graft polymerization and has a butadiene rubber content of 30 to 70% by weight.

The styrene-acrylonitrile (SAN) copolymer has, for example, a weight average molecular weight of 50,000 to 150,000 g / mol and an acrylonitrile monomer content of 20 to 40% by weight.

The modified epoxy resin (B) is, for example, characterized by having repeating units represented by C, D and E in the following general formula (3).

(3)

In Formula 3, R ₁ , R _2, and R ₃ are each independently a hydrogen atom, alkyl having 1 to 20 carbon atoms, aryl having 6 to 24 carbon atoms, or alkylaryl having 7 to 30 carbon atoms.

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X and Y are each independently selected from the group consisting of alkylene having 1 to 20 carbon atoms, alkylene substituted with oxygen or nitrogen, unsubstituted or substituted 6 to 24 carbon atoms, oxygen or nitrogen substituted with arylene, Or a divalent alkylaryl substituted with oxygen or nitrogen.

n ₁ ', n ₂ ' and n ₃ 'are integers of 1 to 100, respectively.

Z is an integer between 1 and 3;

의 반응생성물일 수 있다.For example, the compound of formula (3)

Lt; / RTI >

의 반응생성물일 수 있다.
The formula (3E) is, for example, a compound represented by the formula (3C)

Lt; / RTI >

The non-halogen flame retardant styrenic resin composition is prepared from the group consisting of a char former, a non-halogen flame retardant compound, an impact modifier, a lubricant, a heat stabilizer, an antistatic agent, an antioxidant, a light stabilizer, And further comprising at least one additive selected from the group consisting of:

Wherein the additive is 0.1 to 60 parts by weight based on 100 parts by weight of the base resin made of a styrene-based resin.

According to the present invention, there is provided a non-halogen flame retardant styrene resin composition having a flame retardant efficiency superior to that of a phosphorus-based flame retardant compound and an epoxy resin as a char former when phosphorus-modified epoxy resin is added to a styrene resin .

In order to solve the problems of the prior art as described above, the inventors of the present invention have found that an acrylonitrile-butadiene-styrene (ABS) copolymer, a styrene-acrylonitrile (SAN) copolymer, a polystyrene HIPS) copolymers, and mixtures thereof, while continuing the study of flame retardants passing through IEC TS 62441, a flame retardant standard for external candle flame ignition, while reducing the input of non-halogen flame retardant compounds to various styrenic resins It was confirmed that the phosphorus-modified epoxy resin was added to the base resin made of the styrene-based resin, and that the flame-retarding synergistic effect was exhibited when the phosphorus-based flame retardant and the epoxy resin were added, respectively.

Hereinafter, the present invention will be described in detail.

The non-halogen flame retardant styrene resin composition excellent in flame retardancy of the present invention is characterized by comprising (A) a styrene resin as a base resin and a modified epoxy resin (B).

The flame retardant non-halogen flame retardant styrene resin composition of the present invention is characterized by containing (A) 1 to 30 parts by weight of a modified epoxy resin (B) per 100 parts by weight of the styrene resin.

Each component constituting the non-halogen flame retardant styrene resin composition excellent in flame retardancy according to the present invention will be described in detail as follows.

(A) Base resin

The styrene-based resin may be an acrylonitrile-butadiene-styrene (ABS) copolymer, a styrene-acrylonitrile (SAN) copolymer, a polystyrene (PS) (HIPS) copolymer, or a mixture thereof. For example, 10 to 90% by weight of acrylonitrile-butadiene-styrene (ABS) copolymer and styrene-acrylonitrile By weight to 90% by weight in view of the mechanical properties of the resin.

As another example, the styrenic resin may be 20 to 50 wt% of the ABS copolymer and 50 to 80 wt% of the SAN copolymer, 20 to 40 wt% of the ABS copolymer and 60 to 80 wt% of the SAN copolymer, There is an effect of excellent mechanical properties within the range.

The acrylonitrile-butadiene-styrene (ABS) copolymer is not particularly limited, but is prepared by emulsion graft polymerization, and the content of butadiene rubber is preferably 30 to 70% by weight. For example, the butadiene rubber content may be 40 to 60 wt%, or 50 to 60 wt%.

The butadiene rubber, the acrylonitrile monomer, and the styrene monomer may be emulsion graft-polymerized and then coagulated, dehydrated and dried to obtain a powder. The butadiene rubber having a number average particle diameter of 0.1 to 0.5 μm is usually used in a high ratio By weight.

The emulsion graft polymerization is carried out in the presence of 30 to 70 parts by weight of butadiene rubber, 0.1 to 5 parts by weight of an emulsifier, 0.1 to 3 parts by weight of a molecular weight modifier, and 0.1 to 5 parts by weight of a polymerization initiator, based on 100 parts by weight of total monomers contained in the acrylonitrile- And 0.05 to 1 part by weight of an initiator is continuously or batchwise added to a monomer mixture composed of 5 to 40 parts by weight of acrylonitrile and 20 to 65 parts by weight of styrene.

For example, 45 to 70 parts by weight of butadiene rubber, 0.6 to 2 parts by weight of an emulsifier, 0.2 to 1 part by weight of a molecular weight regulator and 0.05 to 0.5 parts by weight of a polymerization initiator, based on 100 parts by weight of total monomers contained in the acrylonitrile-butadiene- And 5 to 30 parts by weight of acrylonitrile and 20 to 50 parts by weight of styrene are continuously or batchwise added to the mixed solution.

The agglomeration is preferably carried out using 1 to 10% of sulfuric acid or an aqueous solution of a sulfate, for example, 1 to 5% of sulfuric acid or an aqueous solution of sulfuric acid.

The styrene-acrylonitrile (SAN) copolymer preferably has a weight-average molecular weight of 10,000 to 300,000 g / mol and an acrylonitrile monomer content of 5 to 50% by weight, and may be used singly or in combination of two or more. have.

For example, the styrene-acrylonitrile (SAN) copolymer has a weight average molecular weight of 30,000 to 200,000 g / mol, an acrylonitrile monomer content of 10 to 40% by weight, or a weight average molecular weight of 50,000 to 150,000 g / mol , And the content of the acrylonitrile monomer may be 20 to 40% by weight.

(B) modified epoxy resin

The phosphorus-modified epoxy resin is preferably contained in an amount of 1 to 30 parts by weight based on 100 parts by weight of the base resin. The thermoplastic resin composition produced within this range is excellent in mechanical strength and fluidity and has excellent heat stability and weather resistance . For example, the phosphorus-modified epoxy resin can be 5 to 30 parts by weight, or 10 to 30 parts by weight, and has excellent thermal stability and weatherability within this range, and has an excellent balance of physical properties.

The phosphorus-modified epoxy resin is compatible with the base resin, and can generate char when the processed thermoplastic resin is burned. If the phosphorus-containing structure is capable of promoting the dehydrogenation reaction, It does not.

The phosphorus-modified epoxy resin is obtained by reacting an epoxy resin having a repeating unit represented by the following general formula (1A) and (1B) with a reactive phosphorus flame retardant compound 9,10-dihydro-9-oxa-10-phosphaphenanthrene Modified epoxy resin having repeating units C, D, and E represented by the following general formula (3) that can be obtained by reacting 9,10-dihydro-9-oxa-10-phosphahenanthrene-10-oxide It is preferable to select one or more kinds from the groups to be taken into consideration in terms of improving the flame retardancy of the external candle flame ignition.

≪ EMI ID =

≪ RTI ID = 0.0 &

Wherein R ₁ and R ₂ are each independently a hydrogen atom, alkyl having 1 to 20 carbon atoms, aryl having 6 to 24 carbon atoms, or alkylaryl having 7 to 30 carbon atoms.

X and Y are each independently selected from the group consisting of alkylene having 1 to 20 carbon atoms, alkylene substituted with oxygen or nitrogen, unsubstituted or substituted arylene having 6 to 24 carbon atoms or oxygen or nitrogen, Or a divalent alkylaryl substituted with oxygen or nitrogen.

Each of n ₁ and n ₂ is an integer of 0 to 100, and not all of them are 0.

And z is an integer of 1 to 3.

In another example, and in Formula 1, n ₁ is an integer from 1 to 100, n ₂ may be an integer from 0 to 100, or an integer of 1 to 100.

(2)

(3)

In Formula 3, R ₁ , R _2, and R ₃ are each independently a hydrogen atom, alkyl having 1 to 20 carbon atoms, aryl having 6 to 24 carbon atoms, or alkylaryl having 7 to 30 carbon atoms.

R ₄ is hydrogen or a bond with a neighboring epoxy chain.

X and Y are each independently selected from the group consisting of alkylene having 1 to 20 carbon atoms, alkylene substituted with oxygen or nitrogen, unsubstituted or substituted 6 to 24 carbon atoms, oxygen or nitrogen substituted with arylene, Or a divalent alkylaryl substituted with oxygen or nitrogen.

n ₁ ', n ₂ ' and n ₃ 'are each an integer of 0 to 100, and not all of them are 0.

In another example, n ₁ ', n ₂ ' and n ₃ 'in the general formula (3) may each be an integer of 1 to 100.

Z is an integer between 1 and 3;

The phosphorus-modified epoxy resin may have a phosphorus content of 0.5 to 6% by weight, an epoxy equivalent weight of 400 to 2,000 g / eq, and a softening point of 60 to 120 ° C. As another example, the phosphorus content is 0.5 to 5 wt% or 1 to 5 wt%, the epoxy equivalent is 400 to 1500 g / eq or 500 to 1200 g / eq, and the softening point is 60 to 110 DEG C or 70 to 110 DEG C . Within this range, there is an effect of excellent flame retardancy.

As a preferable example, the phosphorus modified epoxy resin may have a structure represented by the following formula (4).

[Chemical Formula 4]

In Formula 4, R ₄ is hydrogen or a bond with a neighboring epoxy chain.

n ₁ ", n ₂ " and n ₃ "are integers between 0 and 100, and are not all zero.

In another example, in the above formula (4), n ₂ "is an integer of 1 to 100, and n ₁ " and n ₃ "are independently an integer of 0 to 100 or an integer of 1 to 100.

Z is an integer between 1 and 3;

The composition according to the present invention is selected from the group consisting of a char former, a non-halogen flame retardant compound, an impact modifier, a lubricant, a heat stabilizer, an antistatic agent, an antioxidant, a light stabilizer, One or more additives may be added in an amount of 0.1 to 60 parts by weight based on 100 parts by weight of the base resin made of a styrene-based resin. For example, 0.1 to 50 parts by weight, or 0.5 to 40 parts by weight.

The flame retardant composition of the present invention may include a step of injecting all the components into an extruder and melt-kneading and extruding at a barrel temperature of 180 to 250 ° C and further injecting the extruder. The extruder may be, An extruder or the like can be used.

The composition is a flame retardant of the external candle frame ignition IEC TS 62441 can be passed.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. Such variations and modifications are intended to be within the scope of the appended claims.

[Example]

Example  One

30 parts by weight of an ABS copolymer (55% by weight of heavy butadiene rubber) produced by LG Chem by emulsion graft polymerization using a butadiene rubber latex having a number average particle diameter of 0.3 탆, an acrylonitrile content of 25% by weight and a weight average molecular weight 100 parts by weight of a base resin composed of 70 parts by weight of a styrene-acrylonitrile copolymer (SAN copolymer) having a weight-average molecular weight of 120,000 g / mol and 219 g / eq of an epoxy equivalent weight and a softening point of 95 占 폚, 500 g of Resin (KD-1090) and 96 g of DOPO were placed in a four-necked round flask equipped with a stirrer, a heating mantle and an absolute thermometer, gradually heated to 160 DEG C and reacted for about 5 hours with a phosphorus content of 2.5% 10 parts by weight of a modified epoxy resin A having an epoxy equivalent weight of 410 g / ect and a softening point of 87 캜, 1.0 part by weight of a lubricant and 0.5 part by weight of an antioxidant were added and uniformly mixed using a Henschel mixer Then, a thermoplastic resin composition in the form of pellets was prepared through a twin screw extruder.

The pelletized thermoplastic resin composition was injection-molded into a flame retardant specimen having a width of 15 cm, a length of 15 cm and a thickness of 3 mm.

Example  2

30 parts by weight of an ABS copolymer, 70 parts by weight of a styrene-acrylonitrile copolymer, 500 g of a urethane-modified epoxy resin having an epoxy equivalent of 219 g / eq and a softening point of 95 캜 (Kukdo Chemical KD-1090) 220 g were placed in a stirrer, a heating mantle, and a four-neck round flask equipped with an open end. The temperature was gradually raised to 160 ° C., and the phosphorus content was 2.2% by weight and the epoxy equivalence weight was 625 g / Except that 10 parts by weight of a phosphorus-modified epoxy resin B at 83 DEG C, 1.0 part by weight of a lubricant and 0.5 parts by weight of an antioxidant were used.

Example  3

Except that 30 parts by weight of the ABS copolymer of Example 1, 70 parts by weight of styrene-acrylonitrile copolymer, 20 parts by weight of phosphorus modified epoxy resin A, 1.0 part by weight of lubricant and 0.5 part by weight of antioxidant were used. 1. ≪ / RTI >

Example  4

Except that 30 parts by weight of the ABS copolymer of Example 1, 70 parts by weight of styrene-acrylonitrile copolymer, 20 parts by weight of phosphorus modified epoxy resin B, 1.0 part by weight of lubricant and 0.5 part by weight of antioxidant were used. 1. ≪ / RTI >

Example  5

Modified epoxy resin C was prepared by reacting an unmodified epoxy resin with DOPO in place of the urethane-modified epoxy resin in Example 1.

Comparative Example  One

5 parts by weight of an epoxy resin C (KODO CHEMICAL YDCN-500-90P) represented by the following Chemical Formula 5 without using the phosphorus-modified epoxy resin A in Example 1 and 9 parts by weight of a phosphorus-containing flame retardant compound 9,10-dihydro- Except that 5 parts by weight of 9,10-dihydro-9-oxa-10-phosphahenanthrene-10-oxide (DOPO) Respectively.

[Chemical Formula 5]

In Formula 5, n is a natural number between 1 and 100.

Comparative Example  2

Except that the phosphorus-modified epoxy resin A was not used and 5 parts by weight of the epoxy resin C represented by the formula 5 and 5 parts by weight of the phosphorus-containing flame retardant compound resorcinol tetraphenyl-di-phosphate (RDP) The procedure of Example 1 was repeated.

Comparative Example  3

In Example 1, 5 parts by weight of urethane-modified epoxy resin D (Kido Chemical KD-1090) and 5 parts by weight of phosphorus-based flame retardant compound resorcinol tetraphenyl-di-phosphate (RDP) were used without using phosphorus-modified epoxy resin A The same procedure as in Example 1 was carried out.

Comparative Example  4

Except that phosphorus-modified epoxy resin A was not used and 10 parts by weight of epoxy resin D and 10 parts by weight of phosphorus-containing flame retardant compound resorcinol tetraphenyl-di-phosphate (RDP) were used in Example 1 Respectively.

[Test Example]

The flame retardancy of the non-halogen flame retardant styrene resin composition specimens prepared in Examples 1 to 5 and Comparative Examples 1 to 4 was measured according to IEC TS 62441, and the results are shown in Table 1 below.

Specifically, in order to measure the ignition flame retardancy of the external candle frame, a candle of 150 mm in length having a diameter of 20 mm was simulated and the following experiment was sequentially performed.

* Sample conditioning: Pre-treatment for at least 24 hours in a chamber of 23 ± 2 ° C and relative humidity of 50 ± 5%, then flame frames in a laboratory with conditions of 15 to 35 ° C and relative humidity of 45 to 75% .

* Ignition source: A needle burner and a 12 mm test flame as specified in IEC 60695-11-5 were used.

* Flame Persistence Assessment: The tip of the burner should be 5 ± 0.5 mm from the Candle Flame Accessible Area (10 mm above the support surface, within 150 mm) and the horizontal axis of the burner tip should be within ± 5 ° , The center line of the burner tip does not deviate from the flame frame allowable area. Even if material shrinkage and recording occurs, the burner flame is maintained for 3 minutes, and when the flame is removed within 3 minutes, it is indicated as PASS when it is removed, and FAIL when it is not.

* Notched Izod Impact Strength: Measured according to ASTM D-256 using a 1/8 "specimen.

Heat Deflection Temperature: Measured according to ASTM D-648 using a 1/4 "specimen.

Number average particle size: The latex was injected into a submicron particle analyzer and particle size analysis was performed by dynamic light scattering method.

* Content of phosphorus: measured by X-ray fluorescence analysis (XRF)

* Softening point: Measured according to KS M 3823 standard.

* Epoxy equivalent: measured according to ISO 3001: 1999

division Example Comparative Example One 2 3 4 5 One 2 3 4 ABS copolymer (parts by weight) 30 30 30 30 30 30 30 30 30 SAN copolymer (parts by weight) 70 70 70 70 70 70 70 70 70 Phosphorus-modified epoxy resin A
(Parts by weight) 10 - 20 - - - - - - Phosphorus-modified epoxy resin B
(Parts by weight) - 10 - 20 - - - - - Phosphorus modified epoxy resin C
(Parts by weight) 10 Epoxy resin C (parts by weight) - - - - - 5 5 - - Epoxy resin D (parts by weight) - - - - - - - 5 10 DOPO (parts by weight) - - - - - 5 - - - RDP (parts by weight) - - - - - - 5 5 10 External Candle Flame Ignition
(IEC TS 62441 standard) PASS PASS PASS PASS PASS FAIL FAIL FAIL PASS Impact strength (Kgf cm / cm) 10 5 4 4 4 12 13 11 3 Heat deformation temperature (캜) 79 77 74 73 78 74 76 76 66

It was confirmed from Table 1 that even when a phosphorus-modified epoxy resin obtained by reacting a reactive phosphorus flame retardant compound with an epoxy resin is added in a small amount, the flame retarding effect is greatly improved.

On the other hand, it was difficult to pass the flame retardant specification when the total amount of epoxy resin and phosphorus-containing flame retardant, which are char formers, was equal to that of the phosphorus-modified epoxy resin, It was possible to satisfy the flame retardancy standard only when it was high.

It is confirmed that the flame retarding effect is somewhat limited when the epoxy resin and the phosphorus compound, which are the tea formers, are added, respectively, than when the phosphorus modified epoxy resin is added.

Therefore, the non-halogen flame retardant styrene resin composition according to Examples 1 to 4 of the present invention is more preferably used as a phosphorus-modified epoxy resin by reacting the two with each other than by using an epoxy resin and a phosphorus compound, The temperature was not lowered and the flame retardant effect was excellent.

The phosphorus-modified epoxy resin (Example 1) prepared by modifying the epoxy resin with urethane and then reacting with the phosphorus compound (Example 1) was compared with the phosphorus-modified epoxy resin (Comparative Example 1) prepared by reacting the epoxy resin with the phosphorus compound without modification (Impact strength, heat distortion temperature, etc.).

Claims (14)

(A) a styrene type resin; And
And a modified epoxy resin (B)
The modified epoxy resin (B) contains a repeating unit containing an epoxy group, a repeating unit containing phosphorus and a repeating unit containing a urethane group
A non-halogen flame retardant styrene resin composition.
delete The method according to claim 1,
The modified epoxy resin (B) is a urethane-modified epoxy resin modified with a phosphorus compound
A non-halogen flame retardant styrene resin composition.
The method according to claim 1,
The modified epoxy resin (B) has a phosphorus content of 0.5 to 6% by weight
A non-halogen flame retardant styrene resin composition.
The method according to claim 1,
The modified epoxy resin (B) has an epoxy equivalent of 400 to 2000 g / eq
A non-halogen flame retardant styrene resin composition.
The method according to claim 1,
Wherein the modified epoxy resin (B) has a softening point of 60 to 120 ° C
A non-halogen flame retardant styrene resin composition.
The method according to claim 1,
The non-halogen flame retardant styrene resin composition
(A) 100 parts by weight of a styrene resin
And 1 to 30 parts by weight of a modified epoxy resin (B)
A non-halogen flame retardant styrene resin composition.
The method according to claim 1,
The styrene-based resin (A) may be at least one selected from the group consisting of an acrylonitrile-butadiene-styrene (ABS) copolymer, a styrene-acrylonitrile (SAN) copolymer, a polystyrene (PS) copolymer, a high impact polystyrene (HIPS) And mixtures thereof. ≪ RTI ID = 0.0 >
A non-halogen flame retardant styrene resin composition.
The method according to claim 1,
Wherein the styrene-based resin (A) comprises 10 to 90% by weight of an acrylonitrile-butadiene-styrene (ABS) copolymer and 10 to 90% by weight of a styrene- acrylonitrile (SAN)
A non-halogen flame retardant styrene resin composition.
10. The method of claim 9,
The acrylonitrile-butadiene-styrene (ABS) copolymer is prepared by emulsion graft polymerization and has a butadiene rubber content of 30 to 70% by weight
A non-halogen flame retardant styrene resin composition.
10. The method of claim 9,
Wherein the styrene-acrylonitrile (SAN) copolymer has a weight average molecular weight of 50,000 to 150,000 g / mol and an acrylonitrile monomer content of 20 to 40% by weight
A non-halogen flame retardant styrene resin composition.
The method according to claim 1,
The modified epoxy resin (B) has a repeating unit represented by C, D and E in the following general formula (3)
A non-halogen flame retardant styrene resin composition.
(3)

In Formula 3, R ₁ , R _2, and R ₃ are each independently a hydrogen atom, alkyl having 1 to 20 carbon atoms, aryl having 6 to 24 carbon atoms, or alkylaryl having 7 to 30 carbon atoms.
X and Y are each independently selected from the group consisting of alkylene having 1 to 20 carbon atoms, alkylene substituted with oxygen or nitrogen, unsubstituted or substituted 6 to 24 carbon atoms, oxygen or nitrogen substituted with arylene, Or a divalent alkylaryl substituted with oxygen or nitrogen.
n ₁ ', n ₂ ' and n ₃ 'are integers of 1 to 100, respectively.
Z is an integer between 1 and 3;
13. The method according to any one of claims 1 to 12,
The non-halogen flame retardant styrenic resin composition is prepared from the group consisting of a char former, a non-halogen flame retardant compound, an impact modifier, a lubricant, a heat stabilizer, an antistatic agent, an antioxidant, a light stabilizer, Characterized in that it further comprises one or more additives selected
A non-halogen flame retardant styrene resin composition.
14. The method of claim 13,
Wherein the additive is 0.1 to 60 parts by weight based on 100 parts by weight of the styrene-based resin
A non-halogen flame retardant styrene resin composition.