KR102154445B1 - Flame-retardant Polypropylene Resin Composition with Excellent Resistance to Hot Wire Ignition - Google Patents

Abstract

The present invention relates to a flame-retardant polypropylene resin composition. The polypropylene resin composition according to an embodiment of the present invention is excellent in resistance to hot wire ignition and flame retardancy. Accordingly, a molded article manufactured therefrom can be effectively used as interior and exterior parts of automobiles, parts of electronic and home appliances, construction and industrial materials, etc., which may be exposed to a hot wire. The flame-retardant polypropylene resin composition includes 60 to 99.4 parts by weight of at least one polypropylene resin, 0.5 to 25 parts by weight of a flame retardant, 0 to 10 parts by weight of an oxide-based flame retardant aid, and 0.1 to 5 parts by weight of an additive.

Description

Flame-retardant polypropylene resin composition with excellent resistance to hot wire ignition {Flame-retardant Polypropylene Resin Composition with Excellent Resistance to Hot Wire Ignition}

The present invention relates to a flame retardant polypropylene resin composition. Specifically, the present invention relates to a flame-retardant polypropylene resin composition having excellent heat ray ignition resistance.

Polypropylene resin, a kind of general-purpose resin, has excellent mechanical properties, moldability and chemical resistance, as well as economical properties, and is used as a material for films, pipes, automobile interior and exterior parts, electrical and home appliance parts, and construction and industrial materials. It is used in various ways.

Since such polypropylene resin is basically a flammable material, attempts have been made to impart flame retardancy to the polypropylene resin. In particular, research has been mainly conducted to increase flame retardancy in case the polypropylene resin directly contacts the flame.

For example, in Korean Patent Application Publication No. 1997-0074843, a bromine compound flame retardant and an inorganic flame retardant, antimony oxide, were used in combination to secure the flame retardancy of a polypropylene resin. In addition, Korean Patent Application Publication No. 2011-0094697 discloses a flame-retardant material to which a high content of synthetic magnesium hydroxide is applied. These materials were intended to increase flame retardancy against direct flame.

On the other hand, due to the development and use of various electric products, it is necessary to prevent fires caused by electric heat sources. In particular, in the case of a polypropylene resin molded article used for washing machines, air conditioners, refrigerators, IH cooking heaters, motors, etc. including electric heating wires, it is necessary to be made of a flame-retardant material that is resistant to ignition by a heating wire.

Therefore, development of a polypropylene resin composition exhibiting excellent flame retardancy against hot wire ignition is required.

Korean Patent Application Publication No. 1997-0074843 Korean Patent Application Publication No. 2011-0094697

Accordingly, an object of the present invention is to provide a flame-retardant polypropylene resin composition having excellent heat ray ignition resistance.

According to one embodiment of the present invention for achieving the above object, based on 100 parts by weight of components (A) to (D), (A) selected from the group consisting of propylene homopolymer and ethylene-propylene block copolymer 60 to 99.4 parts by weight of at least one polypropylene resin; (B) 0.5 to 25 parts by weight of a flame retardant; (C) 0 to 10 parts by weight of an oxide-based flame retardant aid; And (D) containing 0.1 to 5 parts by weight of the additive, the zero shear viscosity (zero shear viscosity) of the polypropylene resin (A) is more than 10,000 P, a flame-retardant polypropylene resin composition is provided.

Here, the ethylene-propylene block copolymer may be obtained by stepwise polymerization of a propylene homopolymer, a propylene-ethylene random copolymer, or a propylene-1-butene random copolymer and an ethylene-propylene rubber copolymer in a reactor.

In addition, the content of the solvent extract in the ethylene-propylene block copolymer may be 5 to 15% by weight.

Preferably, the zero shear viscosity of the polypropylene resin (A) may be 50,000 P or more.

The flame retardant (B) may include at least one halogen-based flame retardant, a phosphorus-based flame retardant, or a mixture thereof.

Specifically, the halogen-based flame retardant is tetrabromo-bisphenol-A-bis (2,3-dibromopropyl ether), tetrabromo-bisphenol-S-bis (2,3-dibromopropyl ether), bis [[3,5-dibromo-4-(2',3'-dibromopropyloxy)]phenyl]sulfone, 1,2-bis(pentabromophenyl)ethane, decabromodiphenyl ether, ethylene -It may contain at least one selected from the group consisting of bis (tetrabromo phthalimide), bispentabromophenoxyethane, tris (tribromoneopentyl) phosphate and melamine hydrobromide.

Phosphorus-based flame retardants are composed of ammonium polyphosphate or melamine surface-treated ammonium polyphosphate, melamine pyrophosphate, melamine phosphate, melamine polyphosphate, alkyl amine phosphate, piperazine polyphosphate, phosphinate metal salt. It may include at least one selected from the group.

The oxide-based flame retardant aid (C) may include at least one selected from the group consisting of antimony trioxide and antimony pentoxide.

The additive (D) may be at least one selected from the group consisting of an antioxidant, a neutralizing agent, a reinforcing material, a filler, a weathering stabilizer, an antistatic agent, a lubricant, a slip agent, a pigment, and a dye.

Specifically, the flame-retardant polypropylene resin composition according to an embodiment of the present invention, based on 100 parts by weight of components (A) to (D), pentaerythritol tetrakis (3-(3,5-di-t-) Butyl-4-hydroxyphenyl)propionate), 1,3,5-trimethyl-tris(3,5-di-t-butyl-4-hydroxybenzene) and tris(2,4-di-t- It may contain at least one antioxidant selected from the group consisting of butylphenyl) phosphite in an amount of 0.01 to 0.5 parts by weight.

Flame-retardant polypropylene resin composition according to an embodiment of the present invention, based on 100 parts by weight of components (A) to (D), at least one neutralizing agent selected from the group consisting of hydrotalcite and calcium stearate. It may be included in an amount of 0.01 to 0.5 parts by weight.

Polypropylene resin composition according to an embodiment of the present invention, based on 100 parts by weight of components (A) to (D), at least selected from the group consisting of talc, mica, silica, clay, kaolin, glass fiber, and calcium carbonate One inorganic substance (E) may be further included in an amount of 10 parts by weight or less.

Polypropylene resin composition according to an embodiment of the present invention, based on 100 parts by weight of components (A) to (D), ethylene-propylene rubber, ethylene-1-butene rubber, ethylene-butylene rubber, ethylene-1-pentene At least one selected from the group consisting of rubber, ethylene-1-hexene rubber, ethylene-1-heptene rubber, ethylene-1-octene rubber, and ethylene-4-methyl-1-pentene rubber; The group consisting of styrene-ethylene-butadiene-styrene rubber, styrene-ethylene-butylene-styrene rubber, styrene-ethylene-propylene-styrene rubber, styrene-ethylene-propylene rubber, styrene-butadiene-styrene rubber and styrene-butadiene rubber At least one selected from; Alternatively, at least one thermoplastic elastomer (F) selected from the group consisting of a mixture thereof may be further included in an amount of 10 parts by weight or less.

According to another embodiment of the present invention, a polypropylene resin molded article manufactured by molding the above polypropylene resin composition is provided.

Preferably, the polypropylene resin molded article may exhibit a hot wire ignition resistance of 2 or more grades and flame retardancy of UL94 V-2 or more.

Specifically, the polypropylene resin molded article may be selected from the group consisting of automobile interior and exterior parts, electronic and home appliance parts, and construction and industrial materials.

Since the polypropylene resin composition according to an embodiment of the present invention has excellent heat ray ignition resistance and flame retardancy, the molded article manufactured therefrom is automotive interior and exterior parts, electronic and home appliance parts, construction and industrial products that may be exposed to heat rays. It can be effectively used as a material.

Hereinafter, the present invention will be described in more detail.

According to an embodiment of the present invention, based on 100 parts by weight of components (A) to (D), at least one polypropylene selected from the group consisting of (A) propylene homopolymer and ethylene-propylene block copolymer System resin 60 to 99.4 parts by weight; (B) 0.5 to 25 parts by weight of a flame retardant; (C) 0 to 10 parts by weight of an oxide-based flame retardant aid; And (D) containing 0.1 to 5 parts by weight of the additive, the zero shear viscosity (zero shear viscosity) of the polypropylene resin (A) is more than 10,000 P, a flame-retardant polypropylene resin composition is provided.

(A) Polypropylene resin

The flame-retardant polypropylene resin composition according to an embodiment of the present invention includes at least one polypropylene resin (A) selected from the group consisting of a propylene homopolymer and an ethylene-propylene block copolymer.

Specifically, the propylene homopolymer may be a polymer obtained by polymerizing a propylene monomer substantially alone.

There is no particular limitation on the method for producing the propylene homopolymer, and the method for producing the propylene homopolymer known in the art may be used as it is or appropriately modified. For example, a bulk polymerization method, a solution polymerization method, a slurry polymerization method, a gas phase polymerization method, or the like can be used, and either a batch method or a continuous method may be used.

The ethylene-propylene block copolymer may be obtained by stepwise polymerization of a propylene homopolymer, a propylene-ethylene random copolymer, or a propylene-1-butene random copolymer and an ethylene-propylene rubber copolymer in a reactor.

Preferably, the content of the solvent extract in the ethylene-propylene block copolymer may be 5 to 15% by weight, but is not limited thereto. At this time, xylene is preferable as the solvent.

There is no particular limitation on the method of preparing the ethylene-propylene block copolymer, and the method for preparing the ethylene-propylene block copolymer known in the art may be used as it is or appropriately modified. For example, one or more bulk (bulk) reactors and one or more gas phase reactors are connected in series and can be continuously polymerized using Mitsui's Hypol process known to those skilled in the art. An ethylene-propylene block copolymer can be prepared by a polymerization method.

Preferably, the polypropylene resin (A) may be a mixture of at least two polypropylene resins selected from the group consisting of a propylene homopolymer and an ethylene-propylene block copolymer.

The polypropylene resin (A) has a zero shear viscosity exceeding 10,000 P. Preferably, the zero shear viscosity of the polypropylene resin (A) may be 50,000 P or more. When the zero shear viscosity of the polypropylene resin (A) is 10,000 P or less, the hot wire ignition resistance of the molded article may be lowered. The zero shear viscosity of the polypropylene resin (A) can be measured using a rheometric ARES rheometer.

The polypropylene resin composition according to an embodiment of the present invention contains a polypropylene resin (A) in an amount of 60 to 99.4 parts by weight based on 100 parts by weight of components (A) to (D). When the content of the polypropylene resin (A) exceeds 99.4 parts by weight, it is difficult to obtain sufficient flame retardancy. On the other hand, if this content is less than 60 parts by weight, mechanical properties and hot wire ignition resistance of the molded article may be deteriorated.

(B) flame retardant

The flame retardant polypropylene resin composition according to an embodiment of the present invention includes a flame retardant (B).

In this case, the flame retardant (B) may include at least one halogen-based flame retardant, a phosphorus-based flame retardant, or a mixture thereof.

Specifically, the halogen-based flame retardant is tetrabromo-bisphenol-A-bis (2,3-dibromopropyl ether), tetrabromo-bisphenol-S-bis (2,3-dibromopropyl ether), bis [[3,5-dibromo-4-(2',3'-dibromopropyloxy)]phenyl]sulfone, 1,2-bis(pentabromophenyl)ethane, decabromodiphenyl ether, ethylene -It may contain at least one selected from the group consisting of bis (tetrabromo phthalimide), bispentabromophenoxyethane, tris (tribromoneopentyl) phosphate and melamine hydrobromide.

Phosphorus-based flame retardants are composed of ammonium polyphosphate or melamine surface-treated ammonium polyphosphate, melamine pyrophosphate, melamine phosphate, melamine polyphosphate, alkyl amine phosphate, piperazine polyphosphate, phosphinate metal salt. It may include at least one selected from the group.

The polypropylene resin composition according to an embodiment of the present invention includes a flame retardant (B) in an amount of 0.5 to 25 parts by weight, based on 100 parts by weight of components (A) to (D). If the content of the flame retardant (B) is less than 0.5 parts by weight, the flame retardancy of the resin composition may be insufficient. On the other hand, when the content of the flame retardant (B) exceeds 25 parts by weight, mechanical properties and hot wire ignition resistance of the resin composition may decrease, and productivity may decrease, which is not preferable.

(C) Oxide flame retardant aid

The flame-retardant polypropylene resin composition according to an embodiment of the present invention may include an oxide-based flame retardant aid (C) in order to further improve flame retardancy.

Preferably, the oxide-based flame retardant aid (C) may be at least one selected from the group consisting of antimony trioxide and antimony pentoxide, but is not limited thereto.

The polypropylene resin composition according to an embodiment of the present invention may contain an oxide-based flame retardant aid (C) in an amount of 10 parts by weight or less, based on 100 parts by weight of components (A) to (D). When the content of the oxide-based flame retardant aid (C) exceeds 10 parts by weight, the mechanical properties of the resin composition may decrease and productivity may decrease, which is not preferable.

(D) additive

The polypropylene resin composition according to an embodiment of the present invention may include a conventional additive (D) within a range not departing from the scope of the present invention. Specifically, the polypropylene resin composition according to an embodiment of the present invention may include an additive (D) in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of components (A) to (D).

For example, the additive (D) may include an antioxidant, a neutralizing agent, an antiblocking agent, a reinforcing material, a filler, a weathering stabilizer, an antistatic agent, a lubricant, a slip agent, a nucleating agent, a flame retardant, a pigment and a dye, etc. It is not.

As a preferred embodiment, the polypropylene resin composition according to an embodiment of the present invention may include an antioxidant to increase its heat resistance. These antioxidants may be phenolic antioxidants, phosphite antioxidants, etc., specifically tetrakis (methylene (3,5-di-t-butyl-4-hydroxy) hydrosilylnate), 1, At least one selected from the group consisting of 3,5-trimethyl-tris(3,5-di-t-butyl-4-hydroxybenzene) and tris(2,4-di-t-butylphenyl)phosphite However, it is not limited to these.

At this time, the antioxidant may be used in an amount of 0.01 to 0.5 parts by weight, preferably 0.05 to 0.3 parts by weight, more preferably 0.08 to 0.2 parts by weight, based on 100 parts by weight of components (A) to (D). If the content of the antioxidant is less than 0.01 parts by weight, it is difficult to secure long-term heat resistance. On the other hand, even if the content of the heat-resistant stabilizer exceeds 0.5 parts by weight, the heat-resistance stability is not further improved, and the economical efficiency of the product may be lowered, which is not preferable.

As a preferred embodiment, the polypropylene resin composition according to the embodiment of the present invention may include a neutralizing agent for removing catalyst residue. The neutralizing agent may be at least one selected from the group consisting of hydrotalcite and calcium stearate, but is not limited thereto.

At this time, the neutralizing agent may be used in an amount of 0.01 to 0.5 parts by weight, preferably 0.05 to 0.3 parts by weight, more preferably 0.08 to 0.2 parts by weight, based on 100 parts by weight of components (A) to (D). If the content of the neutralizing agent is less than 0.01 parts by weight, it is difficult to secure the effect of removing the catalyst residue of the resin. On the other hand, even if the content of the neutralizing agent exceeds 0.5 parts by weight, the increase in the removal effect of the catalyst residue is insignificant and the cost economy of the resin composition may be lowered, which is not preferable.

(E) mineral

The flame-retardant polypropylene resin composition according to an embodiment of the present invention may further include an inorganic material (E).

Specifically, the inorganic material (E) may include at least one selected from the group consisting of talc, mica, silica, clay, kaolin, glass fiber, and calcium carbonate, but is not particularly limited thereto. Preferably, the inorganic material (E) may be talc.

The polypropylene resin composition according to an embodiment of the present invention may further include an inorganic substance (E) in an amount of 10 parts by weight or less based on 100 parts by weight of components (A) to (D). When the inorganic material content exceeds 10 parts by weight, the flame retardancy of the flame retardant polypropylene resin composition may be deteriorated.

(F) thermoplastic elastomer

The flame-retardant polypropylene resin composition according to an embodiment of the present invention may further include a thermoplastic elastomer (F).

Specifically, the thermoplastic elastomer (F) may be a rubber in which ethylene and an α-olefin having 3 to 8 carbon atoms are copolymerized or a styrene-olefin-based rubber. Specifically, the thermoplastic elastomer (F) is an ethylene-propylene rubber, ethylene-1-butene rubber, ethylene-butylene rubber, ethylene-1-pentene rubber, ethylene-1-hexene rubber, ethylene-1-heptene rubber, ethylene- It may be at least one selected from the group consisting of 1-octene rubber and ethylene-4-methyl-1-pentene rubber, but is not particularly limited thereto.

Alternatively, the thermoplastic elastomer (F) is styrene-ethylene-butadiene-styrene rubber, styrene-ethylene-butylene-styrene rubber, styrene-ethylene-propylene-styrene rubber, styrene-ethylene-propylene rubber, styrene-butadiene-styrene rubber, and It may be at least one member selected from the group consisting of styrene-butadiene rubber, but is not particularly limited thereto.

The thermoplastic elastomer (F) may have a melt index of 0.1 to 40 g/10 minutes when measured at 190°C with a load of 2.16 kg. If the melt index is less than 0.1 g/10 minutes, the flowability of the resin composition decreases, resulting in poor processability, and if the melt index exceeds 40 g/10 minutes, the impact resistance or heat ray resistance of the molded product may decrease. have.

The polypropylene resin composition according to an embodiment of the present invention may further include a thermoplastic elastomer (F) in an amount of 10 parts by weight or less based on 100 parts by weight of components (A) to (D). When the content of the thermoplastic elastomer (F) exceeds 10 parts by weight, flame retardancy or resistance to heat rays of the molded article may be deteriorated.

There is no particular limitation on the method of preparing the flame-retardant polypropylene resin composition of the present invention, and the method for preparing a polypropylene resin composition known in the art may be used as it is or appropriately modified, and each resin component described above may be used. You can freely select and mix according to your desired order without any special order restrictions.

Specifically, for example, each of the resins and additives mentioned above are mixed for 1 to 2 hours in a kneader such as Henschel mixer, kneader, roll, Banbury mixer, etc. , It is possible to manufacture a pellet-type polypropylene resin composition by melting and kneading at a temperature of 160 to 230°C using a single-screw/two-screw extruder.

According to another embodiment of the present invention, there is provided a polypropylene resin molded article manufactured by molding the flame retardant polypropylene resin composition of the present invention.

There is no particular limitation on a method of manufacturing a molded article from the polypropylene resin composition according to an embodiment of the present invention, and a method known in the art may be used. For example, a polypropylene resin molded article may be manufactured by molding the polypropylene resin composition according to an embodiment of the present invention by conventional methods such as injection molding, extrusion molding, and casting molding.

Preferably, the polypropylene resin molded article may exhibit a hot wire ignition resistance of 2 or higher and flame retardancy of UL94 V-2 or higher.

Here, the hot wire ignition resistance is measured with a specimen having a thickness of 1.5 mm by ASTM D 3874 method. In addition, flame retardancy is measured with a specimen of 1.5 mm thickness according to the UL-94 vertical combustion test standard.

Specifically, the polypropylene resin molded article according to an embodiment of the present invention may be selected from the group consisting of automobile interior and exterior parts, electronic and home appliance parts, and construction and industrial materials.

Example

Hereinafter, the present invention will be described in more detail through Examples and Comparative Examples. However, the following examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.

The raw materials used in Examples and Comparative Examples are as follows.

A1: Ethylene-propylene block copolymer resin (zero shear viscosity 1.1 × 10 ⁶ P, solvent extract content 12% by weight)

A2: propylene homopolymer resin (zero shear viscosity 3.7 × 10 ⁴ P)

A3: Ethylene-propylene block copolymer resin (zero shear viscosity: 5,000 P, solvent extract content 11% by weight)

B1: Flame retardant (tetrabromo-bisphenol-A-bis (2,3-dibromopropyl ether)

B2: Flame retardant (phosphinate metal salt and melamine hydrobromide mixture)

C1: Flame retardant aid (antimony trioxide)

D1: antioxidant (pentaerythritol tetrakis (3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate))

D2: antioxidant (1,3,5-trimethyl-tris (3,5-di-t-butyl-4-hydroxybenzene))

D3: neutralizing agent (calcium stearate)

Manufacturing example

Resins and compounds of the kind and content (unit: parts by weight) as shown in Table 1 below were melt-blended at a temperature of about 220°C in a twin screw extruder to pelletize. Thereafter, an ASTM specimen was prepared by injection molding with TOYO's TOYO-180T (clamping force 180 tons) under conditions of an injection temperature of 200°C, a mold temperature of 40°C, and an injection pressure of 60 to 100 bar.

Example Comparative example One 2 One 2 3 A1 75.7 - 99.7 - - A2 20 97.7 - 59.7 A3 - - - 95.7 B1 3 - - 3 30 B2 - 2 - - - C1 One - - One 10 D1 0.1 0.1 0.1 0.1 0.1 D2 0.1 0.1 0.1 0.1 0.1 D3 0.1 0.1 0.1 0.1 0.1

Test example

The polypropylene resin, the polypropylene resin composition, and the specimen prepared therefrom used in each of the Examples and Comparative Examples were tested in the following manner. The results are shown in Table 2 below.

(1) Zero shear point diagram

The zero shear viscosity was calculated by measuring dynamic fluidity data in a frequency sweep method at a temperature of 200°C using a rheometer ARES rheometer. The spacing in the parallel plate structure was 2 mm, the plate diameter was 25 mm, and the strain amplitude was 10%. The frequency was measured in the range of 0.05 to 300 rad/sec. Zero shear viscosity was calculated using the Carraeu Model.

(2) Flame retardant

A specimen of 1.5 mm thickness was used and measured at room temperature by UL subject 94 (Underwrites Laboratories Incorporation) “Vertical Flammability Test of Plastic Materials for Mechanical Parts”.

(3) Heat wire ignition resistance

A specimen having a thickness of 1.5 mm was used and measured at room temperature by the method of ASTM D 3874.

Example Comparative example One 2 One 2 3 Flame retardant V-2 V-2 NG V-2 V-0 Hot wire ignition resistance 0 2 2 4 4

As can be seen from Tables 1 and 2 above, the polypropylene resin composition of the examples falling within the scope of the present invention was excellent in both hot wire ignition resistance and flame retardancy.

On the other hand, the polypropylene resin composition of Comparative Example 1 without using a flame retardant had good hot wire ignition resistance, but had very poor flame retardancy. The polypropylene resin composition of Comparative Example 2 in which the zero shear viscosity of the polypropylene-based resin is out of the scope of the present invention has good flame retardancy, but inferior hot wire ignition resistance. In addition, the polypropylene resin composition of Comparative Example 3 in which the content of the flame retardant was outside the scope of the present invention was excellent in flame retardancy, but was inferior in hot wire ignition resistance.

Accordingly, the polypropylene resin composition according to an embodiment that falls within the scope of the present invention can be applied as a plastic product that can be exposed to heat rays. For example, these molded products can be used as interior and exterior parts of automobiles, parts of electronic and home appliances, and construction and industrial materials.

Claims (16)

60 to 99.4 parts by weight of at least one polypropylene resin selected from the group consisting of (A) a propylene homopolymer and an ethylene-propylene block copolymer, based on 100 parts by weight of component (A) to component (D); (B) 0.5 to 25 parts by weight of a flame retardant; (C) 0 to 10 parts by weight of an oxide-based flame retardant aid; And (D) 0.1 to 5 parts by weight of an additive, wherein the zero shear viscosity of the polypropylene resin (A) is greater than 10,000 P, a flame-retardant polypropylene resin composition.
The method of claim 1, wherein the ethylene-propylene block copolymer is obtained by stepwise polymerization of a propylene homopolymer, a propylene-ethylene random copolymer, or a propylene-1-butene random copolymer and an ethylene-propylene rubber copolymer in a reactor. Flame-retardant polypropylene resin composition.
The flame-retardant polypropylene resin composition according to claim 1, wherein the content of the solvent extract in the ethylene-propylene block copolymer is 5 to 15% by weight.
The flame-retardant polypropylene resin composition according to claim 1, wherein the polypropylene resin (A) has a zero shear viscosity of 50,000 P or more.
The flame-retardant polypropylene resin composition according to claim 1, wherein the flame retardant (B) contains at least one halogen-based flame retardant, a phosphorus-based flame retardant, or a mixture thereof.
The method of claim 5, wherein the halogen-based flame retardant is tetrabromo-bisphenol-A-bis (2,3-dibromopropyl ether), tetrabromo-bisphenol-S-bis (2,3-dibromopropyl ether). ), bis[[3,5-dibromo-4-(2',3'-dibromopropyloxy)]phenyl]sulfone, 1,2-bis(pentabromophenyl)ethane, decabromodiphenyl Flame-retardant polypropylene comprising at least one selected from the group consisting of ether, ethylene-bis (tetrabromo phthalimide), bispentabromophenoxyethane, tris (tribromoneopentyl) phosphate and melamine hydrobromide Resin composition.
6. Flame-retardant polypropylene resin composition comprising at least one selected from the group consisting of phosphinate metal salts.
The flame-retardant polypropylene resin composition according to claim 1, wherein the oxide-based flame retardant aid (C) includes at least one selected from the group consisting of antimony trioxide and antimony pentoxide.
The flame-retardant polypropylene resin composition according to claim 1, wherein the additive (D) is at least one selected from the group consisting of antioxidants, neutralizing agents, reinforcing agents, fillers, weathering stabilizers, antistatic agents, lubricants, slip agents, pigments and dyes.
Pentaerythritol tetrakis (3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate) according to claim 9, based on 100 parts by weight of components (A) to (D) , 1,3,5-trimethyl-tris (3,5-di-t-butyl-4-hydroxybenzene) and tris (2,4-di-t-butylphenyl) selected from the group consisting of phosphite Flame-retardant polypropylene resin composition comprising at least one antioxidant in an amount of 0.01 to 0.5 parts by weight.
The method according to claim 9, comprising at least one neutralizing agent selected from the group consisting of hydrotalcite and calcium stearate in an amount of 0.01 to 0.5 parts by weight based on 100 parts by weight of component (A) to component (D). Flame-retardant polypropylene resin composition.
According to claim 1, Based on 100 parts by weight of components (A) to (D), at least one inorganic material (E) selected from the group consisting of talc, mica, silica, clay, kaolin, glass fiber and calcium carbonate Flame-retardant polypropylene resin composition further comprising in an amount of 10 parts by weight or less.
The ethylene-propylene rubber, ethylene-1-butene rubber, ethylene-butylene rubber, ethylene-1-pentene rubber, ethylene-1-hexene according to claim 1, based on 100 parts by weight of components (A) to (D). At least one selected from the group consisting of rubber, ethylene-1-heptene rubber, ethylene-1-octene rubber, and ethylene-4-methyl-1-pentene rubber; The group consisting of styrene-ethylene-butadiene-styrene rubber, styrene-ethylene-butylene-styrene rubber, styrene-ethylene-propylene-styrene rubber, styrene-ethylene-propylene rubber, styrene-butadiene-styrene rubber and styrene-butadiene rubber At least one selected from; Or a flame-retardant polypropylene resin composition further comprising at least one thermoplastic elastomer (F) selected from the group consisting of a mixture thereof in an amount of 10 parts by weight or less.
A flame-retardant polypropylene resin molded article manufactured by molding the polypropylene resin composition according to any one of claims 1 to 13.
The flame-retardant polypropylene resin molded article according to claim 14, which exhibits a hot wire ignition resistance of 2 or higher and flame retardancy of UL94 V-2 or higher.
The flame-retardant polypropylene resin molded article according to claim 14, selected from the group consisting of automobile interior and exterior parts, electronic and home appliance parts, and construction and industrial materials.