Polypropylene resin composition and article produced therefrom

Abstract

A polypropylene resin composition of the present invention comprises: about 100 parts by weight of a polypropylene resin; about 0.3-5 parts by weight of an aromatic phosphate compound; about 1-10 parts by weight of a phosphorus nitrogen-based compound; about 0.01-0.15 parts by weight of a bromine-based compound; and about 0.2-1 parts by weight of 1,1-(1,1,2,2-tetramethylethylene)dibenzene. The polypropylene resin composition has excellent flame retardancy, impact resistance, rigidity, heat resistance, eco-friendliness, extrusion moldability, productivity, and the like.

Description

Polypropylene resin composition and molded article manufactured therefrom

[0001] The present invention relates to a polypropylene resin composition and a molded article manufactured therefrom. More specifically, the present invention relates to a polypropylene resin composition exhibiting excellent flame retardancy, impact resistance, rigidity, heat resistance, environmental friendliness, extrusion moldability, productivity, and the like, and a molded article manufactured therefrom.

[0002]

[0003] Polypropylene resin has excellent chemical resistance, weather resistance, and processability, making it easy to manufacture into injection molded products, films, and blow molded products. It is a widely used material in fields such as electrical components, automobiles, and building materials.

[0004] However, since polypropylene resin has a chemical structure that makes it flammable and difficult to self-extinguish, in order to use a polypropylene resin composition as a flame-retardant material, flame retardants such as halogen-based flame retardants, inorganic flame retardants, and phosphorus-based flame retardants must be added to provide flame-retardant performance.

[0005] Among these flame retardants, halogenated flame retardants (especially brominated flame retardants) are used synergistically with antimony trioxide, but antimony trioxide is managed as a hazardous substance and its use is restricted. In addition, since inorganic flame retardants must be used in high concentrations to provide flame retardancy, they have the disadvantage of significantly reducing other physical properties of the material. Accordingly, phosphorus-based flame retardants are mainly used in conventional flame retardant materials because they are less hazardous than halogenated flame retardants and exhibit less property degradation compared to inorganic flame retardants. However, there is a concern that the desired flame retardant performance may not be achieved when phosphorus-based flame retardants are used alone.

[0006] Accordingly, there is a need to develop an environmentally friendly polypropylene resin composition that has excellent flame retardancy, impact resistance, rigidity, heat resistance, extrusion moldability, productivity, and a balance of these properties, and that satisfies the halogen-free standard with a bromine content of approximately 900 ppm or less according to the IEC 61249-2-21 standard.

[0007] The background technology of the present invention is disclosed in Korean Patent No. 10-1425285, etc.

[0008]

[0009] The purpose of the present invention is to provide a polypropylene resin composition having excellent flame retardancy, impact resistance, rigidity, heat resistance, environmental friendliness, extrusion moldability, productivity, etc.

[0010] Another object of the present invention is to provide a molded article formed from the polypropylene resin composition.

[0011] The above and other objects of the present invention can all be achieved by the present invention described below.

[0012]

[0013] 1. One aspect of the present invention relates to a polypropylene resin composition. The polypropylene resin composition comprises: about 100 parts by weight of a polypropylene resin; about 0.3 to about 5 parts by weight of an aromatic phosphate compound; about 1 to about 10 parts by weight of a phosphorus-based compound; about 0.01 to about 0.15 parts by weight of a brominated compound; and about 0.2 to about 1 part by weight of 1,1-(1,1,2,2-tetramethylethylene)dibenzene.

[0014] 2. In the above 1 specific example, the polypropylene resin may include at least one of a homo polypropylene resin, a block polypropylene resin, and a random polypropylene resin.

[0015] 3. In the above 1 or 2 specific examples, the polypropylene resin may have a melt-flow index of about 0.05 to about 10 g / 10 min, measured under conditions of 230°C and 2.16 kg load, according to ASTM D1238.

[0016] 4. In the above 1 to 3 specific examples, the aromatic phosphate compound may include a compound represented by the following chemical formula 1:

[0017] [Chemical Formula 1]

[0018]

[0019] In the above chemical formula 1, R1, R2, R4 and R5 are each independently a hydrogen atom, a C6-C20 (carbon number 6 to 20) aryl group, or a C6-C20 aryl group substituted with a C1-C10 alkyl group, R3 is a C6-C20 arylene group or a C6-C20 arylene group substituted with a C1-C10 alkyl group, and n is an integer from 0 to 10.

[0020] 5. In the above 1 to 4 specific examples, the phosphorus nitrogen compound may include at least one of piperazine pyrophosphate, melamine phosphate, melamine polyphosphate, melam pyrophosphate, melem pyrophosphate, melon pyrophosphate, melamine pyrophosphate, dimelamine pyrophosphate, melam polyphosphate, melon polyphosphate, melem polyphosphate, ammonium hydrogen phosphate, ammonium dihydrogen phosphate, and ammonium polyphosphate.

[0021] 6. In the above 1 to 5 specific examples, the brominated compound may include one or more of tetrabromobisphenol A bis(2,3-dibromopropyl ether), tetrabromobisphenol A, decabromodiphenyloxide, decabrominateddiphenyl ethane, 1,2-bis(2,4,6-tribromophenyl)ethane, octabromodiphenyl-1,3,3-trimethyl-1-phenylindane, and 2,4,6-tris(2,4,6-tribromophenoxy)-1,3,5-triazine.

[0022] 7. In the above 1 to 6 specific examples, the weight ratio of the sum of the aromatic phosphate compound and the phosphorus nitrogen compound to the bromine compound may be about 1:0.01 to about 1:0.05.

[0023] 8. In the above 1 to 7 specific examples, the weight ratio of the sum of the aromatic phosphate compound and the phosphorus nitrogen compound to the 1,1-(1,1,2,2-tetramethylethylene)dibenzene may be about 1:0.05 to about 1:0.4.

[0024] 9. In the above 1 to 8 specific examples, the polypropylene resin composition may have a flame retardancy of V-2 or higher in a 0.8 mm thick injection molded specimen measured by the UL-94 vertical test method.

[0025] 10. In the above 1 to 9 specific examples, the polypropylene resin composition may have a total combustion time of about 100 seconds or less of a 0.8 mm thick injection molded specimen measured by the UL-94 vertical test method.

[0026] 11. In the above 1 to 10 specific examples, the polypropylene resin composition has a notched Izod impact strength of about 10 to about 50 kJ / m of a 6.4 mm thick specimen measured according to ASTM D256. 2 It could be.

[0027] 12. In the above 1 to 11 specific examples, the polypropylene resin composition may have a tensile strength of about 20 to about 40 MPa for a 3.2 mm thick specimen measured under a condition of 50 mm / min according to ASTM D638, a flexural strength of about 20 to about 50 MPa for a 6.4 mm thick specimen measured under a condition of 2.8 mm / min according to ASTM D790, and a flexural modulus of about 1,000 to about 2,000 MPa for a 6.4 mm thick specimen measured under a condition of 2.8 mm / min according to ASTM D790.

[0028] 13. In the above 1 to 12 specific examples, the polypropylene resin composition may have a heat distortion temperature (HDT) of about 90 to about 140°C of a 6.4 mm thick specimen measured under conditions of 0.45 MPa and a heating rate of 120°C / hr according to ASTM D648.

[0029] 14. In the above specific examples 1 to 13, the polypropylene resin composition may have a bromine content of about 900 ppm or less in 15 mg of a sample measured by ion chromatography according to KS C IEC 62321-3-2.

[0030] 15. Another aspect of the present invention relates to a molded article. The molded article is characterized in that it is formed from a polypropylene resin composition according to any one of 1 to 14.

[0031]

[0032] The present invention has the effect of providing a polypropylene resin composition having excellent flame retardancy, impact resistance, rigidity, heat resistance, environmental friendliness, extrusion moldability, productivity, etc., using recycled polypropylene resin, and a molded article formed therefrom.

[0033]

[0034] Hereinafter, the present invention will be described in detail as follows.

[0035] A polypropylene resin composition according to the present invention comprises (A) a polypropylene resin; (B) an aromatic phosphate compound; (C) a phosphorus-nitrogen compound; (D) a bromine-based compound; and (E) 1,1-(1,1,2,2-tetramethylethylene)dibenzene.

[0036] In this specification, “a to b” indicating a numerical range is defined as “≥a and ≤b”.

[0037]

[0038] (A) Polypropylene resin

[0039] A polypropylene resin according to one specific example of the present invention can be applied together with an aromatic phosphate compound, a phosphorus nitrogen compound, a bromine compound, and 1,1-(1,1,2,2-tetramethylethylene)dibenzene, etc., to improve the flame retardancy, impact resistance, rigidity, heat resistance, environmental friendliness, extrusion moldability, productivity, and the balance of these physical properties of the polypropylene resin composition, and a polypropylene resin applied to a typical thermoplastic resin composition can be used.

[0040] In a specific example, the polypropylene resin may include at least one of a homopolypropylene resin, a block polypropylene resin, and a random polypropylene resin. Here, the block polypropylene resin may be a block polypropylene resin composed of a homopolypropylene block and an ethylene-propylene copolymer block and / or a homopolyethylene block, and the random polypropylene resin may be a propylene-ethylene random copolymer. For example, the polypropylene resin may be a homopolypropylene resin, a block polypropylene resin, a combination thereof, etc.

[0041] In a specific example, the polypropylene resin may have a melt-flow index (MI) of about 0.05 to about 10 g / 10 min, for example, about 0.1 to about 5 g / 10 min, measured under conditions of 230°C and 2.16 kg load according to ASTM D1238. Within this range, the polypropylene resin composition may have excellent extrudability, mechanical properties, flame retardancy, etc.

[0042]

[0043] (B) Aromatic phosphate compound

[0044] An aromatic phosphate compound according to one specific example of the present invention can be applied to a polypropylene resin together with a phosphorus-nitrogen compound, a bromine-based compound, and 1,1-(1,1,2,2-tetramethylethylene)dibenzene, thereby improving the flame retardancy, impact resistance, rigidity, heat resistance, environmental friendliness, extrusion moldability, productivity, and the balance of these physical properties of the polypropylene resin composition. An aromatic phosphate compound used in a typical thermoplastic resin composition can be used.

[0045] In a specific example, the aromatic phosphate compound may include a compound represented by the following chemical formula 1.

[0046] [Chemical Formula 1]

[0047]

[0048] In the above chemical formula 1, R1, R2, R4 and R5 are each independently a hydrogen atom, a C6-C20 (carbon number 6 to 20) aryl group, or a C6-C20 aryl group substituted with a C1-C10 alkyl group, R3 is a C6-C20 arylene group or a C6-C20 arylene group substituted with a C1-C10 alkyl group, for example, derived from a dialcohol such as resorcinol, hydroquinone, bisphenol-A, or bisphenol-S, and n is an integer of 0 to 10, for example, 0 to 4.

[0049] As the aromatic phosphate compound represented by the above chemical formula 1, when n is 0, examples thereof include diaryl phosphates such as diphenyl phosphate, triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, tri(2,6-dimethylphenyl) phosphate, tri(2,4,6-trimethylphenyl) phosphate, tri(2,4-ditertiarybutylphenyl) phosphate, tri(2,6-dimethylphenyl) phosphate, etc., and when n is 1, examples thereof include tetrakis(2,6-dimethylphenyl) 1,3-phenylene bisphosphate, bisphenol-A bis(diphenylphosphate), resorcinol bis(diphenylphosphate), resorcinol bis[bis(2,6-dimethylphenyl) phosphate], resorcinol bis[bis(2,4-ditertiarybutylphenyl) phosphate], and hydroquinone. Examples thereof include bis[bis(2,6-dimethylphenyl)phosphate], hydroquinone bis(diphenylphosphate), hydroquinone bis[bis(2,4-ditertiarybutylphenyl)phosphate], and oligomeric phosphoric acid ester compounds in which n is 2 or more, but are not limited thereto. These may be used singly or in the form of a mixture of two or more. Preferably, resorcinol bis[bis(2,6-dimethylphenyl)phosphate], resorcinol bis(diphenylphosphate), and combinations thereof may be used.

[0050] In a specific example, the aromatic phosphate compound may be included in an amount of about 0.3 to about 5 parts by weight, for example, about 0.4 to about 4 parts by weight, relative to about 100 parts by weight of the polypropylene resin. If the content of the aromatic phosphate compound is less than about 0.3 parts by weight relative to about 100 parts by weight of the polypropylene resin, there is a concern that the flame retardancy, etc. of the polypropylene resin composition may be reduced, and if it exceeds about 5 parts by weight, there is a concern that the extrusion moldability, productivity, etc. of the polypropylene resin composition may be reduced.

[0051]

[0052] (C) Phosphorus nitrogen compounds

[0053] According to one specific example of the present invention, a phosphorus-nitrogen-based compound can be applied to a polypropylene resin together with an aromatic phosphate compound, a brominated compound, and 1,1-(1,1,2,2-tetramethylethylene)dibenzene, thereby improving the flame retardancy, impact resistance, rigidity, heat resistance, environmental friendliness, extrusion moldability, productivity, and the balance of these physical properties of the polypropylene resin composition. A phosphorus-nitrogen-based flame retardant used in a typical thermoplastic resin composition can be used.

[0054] In specific examples, the phosphorus-nitrogen-based compound may include piperazine pyrophosphate, melamine phosphate, melamine polyphosphate, melam pyrophosphate, melem pyrophosphate, melon pyrophosphate, melamine pyrophosphate, dimelamine pyrophosphate, melam polyphosphate, melon polyphosphate, melem polyphosphate, ammonium hydrogen phosphate, ammonium dihydrogen phosphate, ammonium polyphosphate, combinations thereof, multiple salts thereof, and the like. For example, the phosphorus-nitrogen-based compound may include melamine polyphosphate, piperazine pyrophosphate, combinations thereof, and the like.

[0055] In a specific example, the phosphorus nitrogen-based compound may be included in an amount of about 1 to about 10 parts by weight, for example, about 1 to about 6.5 parts by weight, relative to about 100 parts by weight of the polypropylene resin. If the content of the phosphorus nitrogen-based compound is less than about 1 part by weight relative to about 100 parts by weight of the polypropylene resin, there is a concern that the flame retardancy, etc. of the polypropylene resin composition may be reduced, and if it exceeds about 10 parts by weight, there is a concern that the impact resistance, rigidity, etc. of the polypropylene resin composition may be reduced.

[0056] In a specific example, the weight ratio of the aromatic phosphate compound and the phosphorus nitrogen compound may be from about 1:0.1 to about 1:10, for example from about 1:0.3 to about 1:7. In this range, the flame retardancy, impact resistance, etc. of the polypropylene resin composition may be more excellent.

[0057]

[0058] (D) Brominated compounds

[0059] A brominated compound according to one specific example of the present invention can be applied to a polypropylene resin together with an aromatic phosphate compound, a phosphorus nitrogen compound, and 1,1-(1,1,2,2-tetramethylethylene)dibenzene, thereby improving the flame retardancy, impact resistance, rigidity, heat resistance, environmental friendliness, extrusion moldability, productivity, and the balance of these physical properties of the polypropylene resin composition. A brominated flame retardant used in a typical thermoplastic resin composition can be used.

[0060] In specific examples, the brominated compound may include tetrabromobisphenol A bis(2,3-dibromopropyl ether), tetrabromobisphenol A, decabromodiphenyloxide, decabrominateddiphenyl ethane, 1,2-bis(2,4,6-tribromophenyl)ethane, octabromodiphenyl-1,3,3-trimethyl-1-phenylindane, 2,4,6-tris(2,4,6-tribromophenoxy)-1,3,5-triazine, combinations thereof, and the like. For example, the brominated compound may include tetrabromobisphenol A bis(2,3-dibromopropyl ether), tetrabromobisphenol A, combinations thereof, and the like.

[0061] In a specific example, the brominated compound may be included in an amount of about 0.01 to about 0.15 parts by weight, for example, about 0.05 to about 0.12 parts by weight, relative to about 100 parts by weight of the polypropylene resin. If the content of the brominated compound is less than about 0.01 parts by weight relative to about 100 parts by weight of the polypropylene resin, there is a concern that the flame retardancy, etc. of the polypropylene resin composition may be reduced, and if it exceeds about 0.15 parts by weight, there is a concern that the environmental friendliness, etc. of the polypropylene resin composition may be reduced.

[0062] In a specific example, the weight ratio of the sum of the aromatic phosphate compound and the phosphorus nitrogen-based compound to the bromine-based compound (aromatic phosphate compound + phosphorus nitrogen-based compound: bromine-based compound) may be from about 1:0.01 to about 1:0.05, for example, from about 1:0.013 to about 1:0.048. In this range, the flame retardancy, impact resistance, environmental friendliness, etc. of the polypropylene resin composition may be further improved.

[0063]

[0064] (E) 1,1-(1,1,2,2-tetramethylethylene)dibenzene

[0065] According to one specific example of the present invention, 1,1-(1,1,2,2-tetramethylethylene)dibenzene can be applied to a polypropylene resin together with an aromatic phosphate compound, a phosphorus nitrogen compound, a bromine compound, etc., thereby improving the flame retardancy, impact resistance, rigidity, heat resistance, eco-friendliness, extrusion moldability, productivity, and the balance of these physical properties, etc. of the polypropylene resin composition.

[0066] In a specific example, the 1,1-(1,1,2,2-tetramethylethylene)dibenzene may be included in an amount of about 0.2 to about 1 part by weight, for example, about 0.3 to about 0.8 part by weight, based on about 100 parts by weight of the polypropylene resin. When the content of the 1,1-(1,1,2,2-tetramethylethylene)dibenzene is less than about 0.2 part by weight based on about 100 parts by weight of the polypropylene resin, there is a concern that the flame retardancy, etc. of the polypropylene resin composition may be reduced, and when it exceeds about 1 part by weight, there is a concern that the impact resistance, rigidity, extrusion moldability, productivity, etc. of the polypropylene resin composition may be reduced.

[0067] In a specific example, the weight ratio of the sum of the aromatic phosphate compound and the phosphorus nitrogen-based compound to the 1,1-(1,1,2,2-tetramethylethylene)dibenzene (aromatic phosphate compound + phosphorus nitrogen-based compound: 1,1-(1,1,2,2-tetramethylethylene)dibenzene) may be about 1:0.05 to about 1:0.4, for example, about 1:0.06 to about 1:0.35. In the above range, the extrusion moldability, flame retardancy, impact resistance, etc. of the polypropylene resin composition may be more excellent.

[0068]

[0069] A polypropylene resin composition according to one embodiment of the present invention may further include additives included in conventional thermoplastic resin compositions. Examples of such additives include, but are not limited to, UV stabilizers, antioxidants, release agents, nucleating agents, pigments, dyes, and mixtures thereof.

[0070] In a specific example, when the additive is used, the content may be about 0.001 to about 40 parts by weight, for example, about 0.01 to about 10 parts by weight, with respect to about 100 parts by weight of the polypropylene resin, but is not limited thereto.

[0071]

[0072] A polypropylene resin composition according to one specific example of the present invention may be in the form of pellets obtained by mixing the above components and melt-extruding them at about 170 to about 230°C, for example, about 180 to about 220°C, using a conventional twin-screw extruder.

[0073] In a specific example, the polypropylene resin composition may have a flame retardancy of V-2 or higher in a 0.8 mm thick injection molded specimen measured by the UL-94 vertical test method.

[0074] In a specific example, the polypropylene resin composition may have a total burning time of about 100 seconds or less, for example, about 10 to about 90 seconds, of a 0.8 mm thick injection molded specimen measured by the UL-94 vertical test method.

[0075] In a specific example, the polypropylene resin composition has a notched Izod impact strength of about 10 to about 50 kJ / m for a 6.4 mm thick specimen measured according to ASTM D256. 2 , for example, about 10 to about 35 kJ / m 2 It could be.

[0076] In a specific example, the polypropylene resin composition may have a tensile strength of about 20 to about 40 MPa, for example, about 25 to about 35 MPa, of a 3.2 mm thick specimen measured under conditions of 50 mm / min according to ASTM D638.

[0077] In a specific example, the polypropylene resin composition may have a flexural strength of about 20 to about 50 MPa, for example, about 25 to about 35 MPa, of a 6.4 mm thick specimen measured under conditions of 2.8 mm / min according to ASTM D790.

[0078] In a specific example, the polypropylene resin composition may have a flexural modulus of about 1,000 to about 2,000 MPa, for example, about 1,010 to about 1,500 MPa, of a 6.4 mm thick specimen measured under conditions of 2.8 mm / min according to ASTM D790.

[0079] In a specific example, the polypropylene resin composition may have a heat distortion temperature (HDT) of about 90 to about 140°C, for example, about 100 to about 120°C, of ​​a 6.4 mm thick specimen measured under conditions of 0.45 MPa and a heating rate of 120°C / hr according to ASTM D648.

[0080] In a specific example, the polypropylene resin composition may have a bromine content of about 900 ppm or less, for example, about 600 to about 900 ppm, per 15 mg of a sample measured by ion chromatography according to KS C IEC 62321-3-2.

[0081] In a specific example, the polypropylene resin composition may have a melt-flow index of about 1 to about 5 g / 10 min, for example, about 1.5 to about 4.5 g / 10 min, measured under conditions of 230°C and 2.16 kg load according to ASTM D1238.

[0082]

[0083] The molded article according to the present invention is formed from the polypropylene resin composition. The polypropylene resin composition can be manufactured in the form of pellets, and the manufactured pellets can be manufactured into various molded articles (products) through various molding methods such as injection molding, extrusion molding, vacuum molding, and casting molding. Such molding methods are well known to those skilled in the art to which the present invention pertains.

[0084] In a specific example, the molded product has excellent flame retardancy, impact resistance, rigidity, heat resistance, environmental friendliness, extrusion moldability, productivity, and balance of these properties, and is therefore useful as an architectural interior material.

[0085]

[0086] Hereinafter, the present invention will be described in more detail through examples; however, these examples are for the purpose of explanation only and should not be construed as limiting the present invention.

[0087]

[0088] Example

[0089] Below, the specifications of each component used in the examples and comparative examples are as follows.

[0090] (A) Polypropylene resin

[0091] 55.6 wt% of block polypropylene resin (ethylene-propylene block copolymer, B-PP, manufacturer: Lotte Chemical, product name: B-310) and 44.4 wt% of homo polypropylene resin (manufacturer: Lotte Chemical, product name: B-120) were mixed and used.

[0092] (B) Aromatic phosphate compound

[0093] Tetrakis(2,6-dimethylphenyl) 1,3-phenylene bisphosphate (Manufacturer: DAIHACHI, Product name: PX-200) was used.

[0094] (C) Phosphorus nitrogen compounds

[0095] Melamine polyphosphate (Manufacturer: Kempia, Product name: MPP-D) was used.

[0096] (D) Brominated compounds

[0097] Tetrabromobisphenol A bis(2,3-dibromopropyl ether) (BDDP, manufacturer: OCEAN CHEMICAL, product name: XZ-6800) was used.

[0098] (E) 1,1-(1,1,2,2-tetramethylethylene)dibenzene

[0099] 1,1-(1,1,2,2-tetramethylethylene)dibenzene (Manufacturer: WUXI ZHUFENG FINE CHEMICAL, Product name: Dicumene) was used.

[0100]

[0101] Examples 1 to 9 and Comparative Examples 1 to 8

[0102] Each of the above components was added in the amounts shown in Tables 1, 2, 3, and 4 below, and then extruded at about 180 to about 220°C to produce pellets. The extrusion was performed using a twin-screw extruder with an L / D of 36 and a diameter of 45 mm, and the produced pellets were dried at about 80°C for about 2 hours or more, and then injected into a 220-ton injection molding machine (molding temperature: about 220°C, mold temperature: about 40°C) to produce test pieces. The physical properties of the produced test pieces were evaluated using the following methods, and the results are shown in Tables 1, 2, 3, and 4 below.

[0103]

[0104] Method of measuring physical properties

[0105] (1) Flame retardancy evaluation: The flame retardancy of 0.8 mm thick injection molded specimens was measured using the UL-94 vertical test method. (NC: Non-Class, not meeting the standard)

[0106] (2) Flame retardancy evaluation: The total burning time (sum of the burning time after the first contact (T1) and the burning time after the second contact (T2), unit: seconds) of a 0.8 mm thick injection specimen was measured using the UL-94 vertical test method.

[0107] (3) Notched Izod impact strength (unit: kJ / m) 2 ): The notched Izod impact strength of 6.4 mm thick specimens was measured according to ASTM D256.

[0108] (4) Tensile strength (unit: MPa): The tensile strength of a 3.2 mm thick specimen was measured under conditions of 50 mm / min according to ASTM D638.

[0109] (5) Flexural strength (unit: MPa): According to ASTM D790, the flexural strength of a 6.4 mm thick specimen was measured under conditions of 2.8 mm / min.

[0110] (6) Flexural modulus (unit: MPa): According to ASTM D790, the flexural modulus of a 6.4 mm thick specimen was measured under conditions of 2.8 mm / min.

[0111] (7) Heat deflection temperature (unit: ℃): According to ASTM D648, the heat deflection temperature (HDT) of a 6.4 mm thick specimen was measured under the conditions of 0.45 MPa and a heating rate of 120℃ / hr.

[0112] (8) Bromine content (unit: ppm): The bromine content in 15 mg of the sample was measured using ion chromatography according to KS C IEC 62321-3-2.

[0113] (9) Melt-flow index (unit: g / 10 min): Melt-flow index was measured under conditions of 230℃ and 2.16 kg load according to ASTM D1238.

[0114] (10) Productivity evaluation: When adding components for pellet manufacturing, the presence or absence of hopper clogging was checked.

[0115]

[0116] Example 12345 (A) (parts by weight) 100 100 100 100 100 (B) (parts by weight) 0.41 41 1 (C) (parts by weight) 1.6 1.6 1.6 16.5 (D) (parts by weight) 0.10 10 10 10 10.1 (E) (parts by weight) 0.5 20 52 0.52 0.52 0.52 0.52 Flame retardancy V-2 V-2 V-2 V-2 V-2 Total burning time 77 39 16 44 28 Notched Izod Impact strength 29.6 27.4 26.1 28.6 10.3 Tensile strength 31.1 31.2 31.4 31.8 30.1 Flexural strength 30.1 30.5 30.4 31.6 27.6 Flexural modulus 1,140 1,110 1,080 1,110 1,010 Heat deflection temperature 115.9 115.6 114.8 116.9 108.8 Bromine content 684 736 715 720 698 Flow index 2.2 2.0 2.4 2.8 3.5 Hopper clogging presence or absence ...

[0117]

[0118] Example 6789 (A) (parts by weight) 100 100 100 100 (B) (parts by weight) 11 1 1 (C) (parts by weight) 1.6 1.6 1.6 1.6 (D) (parts by weight) 0.05 0.12 0.10 1 (E) (parts by weight) 0.5 20.5 20.3 0.8 Flame retardancy V-2 V-2 V-2 V-2 Total burning time 89 36 6 219 Notched Izod impact strength 26.8 28.1 29.5 23.8 Tensile strength 31.3 32 31.5 31 Flexural strength 30.2 30.6 31.2 30.1 Flexural modulus 1,1 1 0 1, ... Content 376880751699 Flow index 2.12.11.94.2 Hopper clogging None None None None

[0119]

[0120] Comparative Example 1234 (A) (parts by weight) 100 100 100 100 (B) (parts by weight) 0.16 11 (C) (parts by weight) 1.6 1.6 0.5 14 (D) (parts by weight) 0.10 10 10 10.1 (E) (parts by weight) 0.5 20.5 20.5 20.5 20.5 2 Flame retardancy NC Not for production V-2 V-2 Total burning time 250↑ 108 33 Notched Izod impact strength 29.4 29.9 6.3 Tensile strength 31.4 32.1 28.6 Flexural strength 30.7 31.8 2 5.5 Flexural modulus 1,14 0 1,13 0 9 50 Heat deflection temperature 115.5 117.2 107.1 Bromine content 72 16 8 17 4 4 Flow index 2.2 1.8 4.8 Hopper clogging Yes or no Yes or no No

[0121]

[0122] Comparative Example 5678 (A) (parts by weight) 100 100 100 100 (B) (parts by weight) 11 1 1 (C) (parts by weight) 1.6 1.6 1.6 1.6 (D) (parts by weight) -0.2 0.1 6 0.1 6 (E) (parts by weight) 0.5 20.5 20.1 1.5 Flame retardancy V-2 V-2 N.CV-2 Total burning time 149 14 250 ↑ 11 Notch Izod impact strength 26.8 28.8 29.2 9.6 Tensile strength 30.8 31.9 32.9 30.1 Flexural strength 29.6 30.9 3129.2 Flexural modulus 1,1 3 0 1,0 8 0 1,1 4 0 9 7 0 Heat deflection temperature 117 115.9 116.6 112.5 Bromine Content ND1,399663771 Flow index 1.92.31.86.4 Hopper clogging None None None None

[0123]

[0124] From the above results, it can be seen that the polypropylene resin composition of the present invention is excellent in flame retardancy (flame retardancy, total combustion time), impact resistance (notched Izod impact strength), rigidity (tensile strength, flexural strength, flexural modulus), heat resistance (heat distortion temperature), extrusion moldability (flow index), productivity (presence or absence of hopper clogging), and the balance of these physical properties, and it can be seen that it is environmentally friendly as the halogen (bromine) content is less than 900 ppm (satisfies the halogen-free standard).

[0125] On the other hand, in the case of Comparative Example 1, where the content of the aromatic phosphate compound is less than the range of the present invention, it can be seen that the flame retardancy, etc. is reduced, and in the case of Comparative Example 2, where the content of the aromatic phosphate compound is more than the range of the present invention, it can be seen that the hopper input clogging phenomenon occurred, making production impossible, and in the case of Comparative Example 3, where the content of the phosphorus nitrogen-based compound is less than the range of the present invention, it can be seen that the flame retardancy, etc. is reduced, and in the case of Comparative Example 4, where the content of the phosphorus nitrogen-based compound is more than the range of the present invention, it can be seen that the impact resistance, rigidity, etc. are reduced. In addition, in the case of Comparative Example 5, where the content of the brominated compound is less than the range of the present invention, it can be seen that the flame retardancy, etc. are reduced, and in the case of Comparative Example 6, where the content of the brominated compound is more than the range of the present invention, it can be seen that the halogen (bromine) content is more than 900 ppm, so the environmental friendliness, etc. are reduced, and in the case of Comparative Example 7, where the content of 1,1-(1,1,2,2-tetramethylethylene)dibenzene is less than the range of the present invention, it can be seen that the flame retardancy, etc. are reduced, and in the case of Comparative Example 8, where the content of 1,1-(1,1,2,2-tetramethylethylene)dibenzene is more than the range of the present invention, it can be seen that the impact resistance, rigidity, extrusion moldability, etc. are reduced.

[0126]

[0127] The present invention has been described with reference to exemplary embodiments. Those skilled in the art will appreciate that the present invention can be implemented in modified forms without departing from its essential characteristics. Therefore, the disclosed embodiments should be considered illustrative rather than limiting. The scope of the present invention is set forth in the claims, not the foregoing description, and all differences within the scope equivalent thereto should be construed as being encompassed by the present invention.

Claims

1. About 100 parts by weight of polypropylene resin; About 0.3 to about 5 parts by weight of an aromatic phosphate compound; About 1 to about 10 parts by weight of a phosphorus nitrogen compound; About 0.01 to about 0.15 parts by weight of a brominated compound; and A polypropylene resin composition characterized by comprising about 0.2 to about 1 part by weight of 1,1-(1,1,2,2-tetramethylethylene)dibenzene.

2. A polypropylene resin composition according to claim 1, characterized in that the polypropylene resin comprises at least one of a homo polypropylene resin, a block polypropylene resin, and a random polypropylene resin.

3. A polypropylene resin composition according to claim 1, characterized in that the polypropylene resin has a melt-flow index of about 0.05 to about 10 g / 10 min, measured under conditions of 230°C and 2.16 kg load, according to ASTM D1238.

4. A polypropylene resin composition according to claim 1, wherein the aromatic phosphate compound comprises a compound represented by the following chemical formula 1: [Chemical Formula 1] In the above chemical formula 1, R1, R2, R4 and R5 are each independently a hydrogen atom, a C6-C20 (carbon number 6 to 20) aryl group, or a C6-C20 aryl group substituted with a C1-C10 alkyl group, R3 is a C6-C20 arylene group or a C6-C20 arylene group substituted with a C1-C10 alkyl group, and n is an integer from 0 to 10.

5. A polypropylene resin composition according to claim 1, wherein the phosphorus-based compound comprises at least one of piperazine pyrophosphate, melamine phosphate, melamine polyphosphate, melam pyrophosphate, melem pyrophosphate, melon pyrophosphate, melamine pyrophosphate, dimelamine pyrophosphate, melam polyphosphate, melon polyphosphate, melem polyphosphate, ammonium hydrogen phosphate, ammonium dihydrogen phosphate, and ammonium polyphosphate.

6. A polypropylene resin composition according to claim 1, wherein the brominated compound comprises at least one selected from the group consisting of tetrabromobisphenol A bis(2,3-dibromopropyl ether), tetrabromobisphenol A, decabromodiphenyloxide, decabrominated diphenyl ethane, 1,2-bis(2,4,6-tribromophenyl)ethane, octabromodiphenyl-1,3,3-trimethyl-1-phenylindane, and 2,4,6-tris(2,4,6-tribromophenoxy)-1,3,5-triazine.

7. A polypropylene resin composition according to claim 1, wherein the weight ratio of the sum of the aromatic phosphate compound and the phosphorus nitrogen compound to the bromine compound is from about 1:0.01 to about 1:0.

05.

8. A polypropylene resin composition according to claim 1, wherein the weight ratio of the sum of the aromatic phosphate compound and the phosphorus nitrogen compound to the 1,1-(1,1,2,2-tetramethylethylene)dibenzene is about 1:0.05 to about 1:0.

4.

9. In the first paragraph, the polypropylene resin composition is characterized in that the flame retardancy of a 0.8 mm thick injection molded specimen measured by the UL-94 vertical test method is V-2 or higher.

10. In the first paragraph, the polypropylene resin composition is characterized in that the total combustion time of a 0.8 mm thick injection molded specimen measured by the UL-94 vertical test method is about 100 seconds or less.

11. In the first paragraph, the polypropylene resin composition has a notched Izod impact strength of about 10 to about 50 kJ / m of a 6.4 mm thick specimen measured according to ASTM D256. 2 A polypropylene resin composition characterized by:

12. In the first paragraph, the polypropylene resin composition is characterized in that the tensile strength of a 3.2 mm thick specimen measured under a condition of 50 mm / min according to ASTM D638 is about 20 to about 40 MPa, the flexural strength of a 6.4 mm thick specimen measured under a condition of 2.8 mm / min according to ASTM D790 is about 20 to about 50 MPa, and the flexural modulus of a 6.4 mm thick specimen measured under a condition of 2.8 mm / min according to ASTM D790 is about 1,000 to about 2,000 MPa.

13. In the first paragraph, the polypropylene resin composition is characterized in that the heat distortion temperature (HDT) of a 6.4 mm thick specimen measured under conditions of 0.45 MPa and a heating rate of 120°C / hr according to ASTM D648 is about 90 to about 140°C.

14. In the first paragraph, the polypropylene resin composition is characterized in that the bromine content in 15 mg of a sample measured by ion chromatography is about 900 ppm or less according to KS C IEC 62321-3-2.

15. A molded product characterized by being formed from a polypropylene resin composition according to any one of claims 1 to 14.

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