Polypropylene resin composition and molded article produced therefrom

Abstract

A polypropylene resin composition according to the present invention is characterized by comprising: about 100 parts by weight of a base material including about 45 wt% to about 75 wt% of a polypropylene resin and about 25 wt% to about 55 wt% of a recycled polypropylene resin; about 1 part by weight to about 10 parts by weight of a maleic anhydride-modified polypropylene; about 30 parts by weight to about 65 parts by weight of a glass fiber; about 1 part by weight to about 10 parts by weight of a zeolite including two or more of zeolite 3A, zeolite 4A, or zeolite 5A; and about 0.5 parts by weight to about 3 parts by weight of a magnesium silicate. The polypropylene resin composition is environmentally friendly due to using the recycled polypropylene resin, has excellent impact resistance, rigidity, appearance characteristics, and the like, and can reduce odor-causing components and volatile organic compounds.

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 using recycled polypropylene resin, which is environmentally friendly, exhibits excellent impact resistance, rigidity, and appearance properties, and reduces odor-causing components and volatile organic compounds, and to 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] In response to environmental issues such as carbon dioxide (CO2) reduction, there is a growing demand for the development of recycled plastics that recycle used thermoplastic resins such as polypropylene resin.

[0005] However, recycled plastics are subject to long-term, everyday use, oxidation, and repeated thermal processing, resulting in deterioration of mechanical properties compared to conventional plastic materials (thermoplastic resin compositions). Furthermore, during the oxidation, reprocessing, and multiple extrusion processes of recycled plastics, low-molecular-weight substances and polar substances remain in the product, which can act as volatile substances and odor-causing ingredients, leading to off-flavor and color changes in the final product.

[0006] Therefore, there is a need to develop a polypropylene resin composition that is environmentally friendly using recycled polypropylene resin, has excellent impact resistance, rigidity, and appearance characteristics even when using recycled polypropylene resin, and can reduce odor-causing components and volatile organic compounds.

[0007] The background technology of the present invention is disclosed in Korean Patent Publication No. 10-2015-0141967, etc.

[0008]

[0009] The purpose of the present invention is to provide a polypropylene resin composition that is environmentally friendly, has excellent impact resistance, rigidity, and appearance properties, and can reduce odor-causing components and volatile organic compounds by using recycled polypropylene resin.

[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 base material comprising about 45 to about 75 wt% of a polypropylene resin and about 25 to about 55 wt% of a recycled polypropylene resin; about 1 to about 10 parts by weight of a maleic anhydride-modified polypropylene; about 30 to about 65 parts by weight of a glass fiber; about 1 to about 10 parts by weight of a zeolite comprising two or more of zeolite 3A, zeolite 4A, and zeolite 5A; and about 0.5 to about 3 parts by weight of magnesium silicate.

[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 10 to about 1,500 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 recycled polypropylene resin may have a melt-flow index of about 10 to about 150 g / 10 min, measured under conditions of 230°C and 2.16 kg load, according to ASTM D1238.

[0017] 5. In the above specific examples 1 to 4, the maleic anhydride-modified polypropylene may have a grafting ratio of maleic anhydride of about 0.5 to about 5 wt%.

[0018] 6. In the above 1 to 5 specific examples, the weight ratio of the zeolite and the magnesium silicate may be about 1:0.2 to about 1:1.

[0019] 7. In the above 1 to 6 specific examples, the polypropylene resin composition may further include about 0.1 to about 1 part by weight of a fragrance masterbatch based on about 100 parts by weight of the base material.

[0020] 8. In the above 1 to 7 specific examples, the content of the recycled polypropylene resin in the polypropylene resin composition may be about 13 wt% or more out of 100 wt% of the total polypropylene resin composition.

[0021] 9. In the above 1 to 8 specific examples, the polypropylene resin composition has a notched Izod impact strength of about 11 to about 20 kJ / m of a specimen measuring 80 mm × 10 mm × 4 mm at 23°C, as measured according to ISO 180. 2 It could be.

[0022] 10. In the above 1 to 9 specific examples, the polypropylene resin composition has an unnotched Charpy impact strength of about 35 to about 45 kJ / m of a specimen measuring 80 mm × 10 mm × 4 mm at 23°C, as measured according to ISO 179-1eU. 2 It could be.

[0023] 11. In the above 1 to 10 specific examples, the polypropylene resin composition may have a tensile strength of about 92 to about 110 MPa of an ISO 527-1A specimen measured under a temperature condition of 23°C and a crosshead speed condition of 5 mm / min according to ISO 527.

[0024] 12. In the above 1 to 11 specific examples, the polypropylene resin composition may have a flexural strength of about 137 to about 160 MPa for a specimen measuring 80 mm × 10 mm × 4 mm, measured under a crosshead speed condition of 2 mm / min, according to ISO 178, and a flexural modulus of about 7,000 to about 7,500 MPa for a specimen measuring 80 mm × 10 mm × 4 mm, measured under a crosshead speed condition of 2 mm / min, according to ISO 178.

[0025] 13. In the above 1 to 12 specific examples, the polypropylene resin composition may have a total volatile organic compound (TVOC) detection area value of about 600 to about 750 area / g of a sample of 2 g, measured by capturing at 120°C for 60 minutes using HS-SPME GC / MS according to VDA 277.

[0026] 14. In the above 1 to 13 specific examples, the polypropylene resin composition is a 40 cm specimen measured under 80°C / 2 hr and B3 (dry) conditions according to VDA 270. 3 / 2L may have an odor rating of about 2.5 to about 3.5.

[0027] 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.

[0028]

[0029] The present invention has the effect of providing a polypropylene resin composition using recycled polypropylene resin, which is environmentally friendly, has excellent impact resistance, rigidity, and appearance properties, and can reduce odor-inducing components and volatile organic compounds, and a molded article formed therefrom.

[0030]

[0031] Hereinafter, the present invention will be described in detail as follows.

[0032] A polypropylene resin composition according to the present invention comprises (A) a polypropylene resin; (B) a recycled polypropylene resin; (C) a maleic anhydride modified polypropylene; (D) glass fiber; (E) a zeolite; and (F) magnesium silicate.

[0033] In this specification, “a to b” indicating a numerical range is defined as “≥a and ≤b”.

[0034]

[0035] (A) Polypropylene resin

[0036] According to one specific example of the present invention, a polypropylene resin can be applied together with maleic anhydride-modified polypropylene, glass fiber, two or three types of zeolites, and magnesium silicate to improve the eco-friendliness, impact resistance, rigidity, appearance characteristics, etc. of a polypropylene resin composition, and reduce odor-inducing components and volatile organic compounds, even when applying a recycled polypropylene resin to impart eco-friendliness, and a polypropylene resin (new material) applied to a typical thermoplastic resin composition can be used.

[0037] 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.

[0038] In a specific example, the polypropylene resin may have a melt-flow index (MI) of about 10 to about 1,500 g / 10 min, for example, about 15 to about 1,400 g / 10 min, measured under conditions of 230°C and a load of 2.16 kg according to ASTM D1238. Within this range, the mechanical properties, moldability, impregnation properties, etc. of the polypropylene resin composition may be excellent.

[0039] In a specific example, the polypropylene resin may be included in an amount of about 45 to about 75 wt%, for example, about 50 to about 70 wt%, of 100 wt% of the base material composed of the polypropylene resin and the recycled polypropylene resin. If the content of the polypropylene resin is less than about 45 wt% of the base material, there is a concern that the impact resistance, rigidity, and volatile organic compound reduction effect of the polypropylene resin composition may be reduced, and if it exceeds about 75 wt%, there is a concern that the environmental friendliness of the polypropylene resin composition may be reduced.

[0040]

[0041] (B) Regenerated polypropylene resin

[0042] According to one specific example of the present invention, a recycled polypropylene resin is applied to a polypropylene resin composition as a recycled material to impart environmental friendliness, and is applied together with the polypropylene resin (new material), maleic anhydride-modified polypropylene, glass fiber, two or three types of zeolites and magnesium silicate, etc., to improve the environmental friendliness, impact resistance, rigidity, etc. of the polypropylene resin composition, and to reduce odor-causing components and volatile organic compounds. A conventional recycled polypropylene resin can be used.

[0043] In a specific example, the recycled polypropylene resin may have a melt-flow index (MI) of about 10 to about 150 g / 10 min, for example, about 20 to about 80 g / 10 min, measured under conditions of 230°C and a load of 2.16 kg according to ASTM D1238. Within this range, the polypropylene resin composition may have excellent rigidity, impact resistance, and the like.

[0044] In a specific example, the recycled polypropylene resin may be included in an amount of about 25 to about 55 wt%, for example, about 30 to about 50 wt%, of the polypropylene resin and 100 wt% of the base material made of the recycled polypropylene resin. If the content of the polypropylene resin is less than about 25 wt%, of the 100 wt% base material, there is a concern that the environmental friendliness of the polypropylene resin composition may be reduced, and if it exceeds about 55 wt%, there is a concern that the impact resistance, rigidity, and volatile organic compound reduction effect of the polypropylene resin composition may be reduced.

[0045]

[0046] (C) Maleic anhydride modified polypropylene

[0047] According to one specific example of the present invention, maleic anhydride-modified polypropylene can be applied to the polypropylene resin and the recycled polypropylene resin together with glass fiber, two or three types of zeolites, and magnesium silicate, thereby improving the eco-friendliness, impact resistance, rigidity, appearance characteristics, etc. of the polypropylene resin composition and reducing odor-inducing components and volatile organic compounds. Maleic anhydride-modified polypropylene obtained by (grafting) polymerizing maleic anhydride onto polypropylene can be used.

[0048] In a specific example, the maleic anhydride-modified polypropylene may have a graft ratio of maleic anhydride of about 0.5 to about 5 wt%, for example, about 0.6 to about 2 wt%. Within this range, the rigidity, impact resistance, etc. of the polypropylene resin composition may be excellent.

[0049] In a specific example, the maleic anhydride-modified polypropylene may have a melt-flow index of about 50 to about 200 g / 10 min, for example, about 70 to about 150 g / 10 min, measured under conditions of 230°C and a load of 2.16 kg according to ASTM D1238. Within this range, the polypropylene resin composition may have excellent rigidity, impact resistance, and the like.

[0050] In a specific example, the maleic anhydride-modified polypropylene may be included in an amount of about 1 to about 10 parts by weight, for example, about 1 to about 8 parts by weight, based on about 100 parts by weight of the base material. If the content of the maleic anhydride-modified polypropylene is less than about 1 part by weight based on about 100 parts by weight of the polypropylene resin, there is a concern that the impact resistance, rigidity, impregnation property, etc. of the polypropylene resin composition may be reduced, and if it exceeds about 10 parts by weight, there is a concern that the rigidity of the polypropylene resin composition, the effect of reducing odor-inducing components, etc. may be reduced.

[0051]

[0052] (D) Glass fiber

[0053] According to one specific example of the present invention, the glass fiber is applied to the polypropylene resin and the recycled polypropylene resin together with maleic anhydride modified polypropylene, two or three types of zeolites and magnesium silicate, etc., so as to improve the eco-friendliness, impact resistance, rigidity, appearance characteristics, etc. of the polypropylene resin composition, and to reduce odor-inducing components and volatile organic compounds. Long glass fibers used in conventional thermoplastic resin compositions can be used.

[0054] In specific embodiments, the glass fibers may be in the form of fibers and may have various cross-sections such as circular, oval, rectangular, etc. For example, it may be preferable in terms of mechanical properties to use fibrous glass fibers having circular and / or rectangular cross-sections.

[0055] In a specific example, the glass fiber may have a cross-sectional diameter of about 5 to about 20 μm, for example, about 7 to about 15 μm, as measured by a scanning electron microscope (SEM). Within this range, the impact resistance, rigidity, dimensional stability, etc. of the polypropylene resin composition may be excellent.

[0056] In a specific example, the glass fiber may be cut to have a length corresponding to the size of the thermoplastic resin composition (e.g., about 11 mm), depending on the shape (pellet, etc.) and size of the thermoplastic resin composition, and in a molded product processed therefrom, the length may vary depending on the type of the molded product, but may have an average length of about 2 mm.

[0057] In a specific example, the glass fiber may be treated with a conventional surface treatment agent. The surface treatment agent may include, but is not limited to, a silane compound, a urethane compound, an epoxy compound, or the like.

[0058] In a specific example, the glass fiber may be included in an amount of about 30 to about 65 parts by weight, for example, about 40 to about 60 parts by weight, based on about 100 parts by weight of the base material. If the content of the glass fiber is less than about 30 parts by weight based on about 100 parts by weight of the base material, there is a concern that the impact resistance, rigidity, and volatile organic compound reduction effect of the polypropylene resin composition may be reduced, and if it exceeds about 65 parts by weight, there is a concern that the volatile organic compound reduction effect of the polypropylene resin composition, environmental friendliness, etc. may be reduced.

[0059]

[0060] (E) Zeolite

[0061] According to one specific example of the present invention, a zeolite is applied to the polypropylene resin and the recycled polypropylene resin together with maleic anhydride modified polypropylene, glass fiber, and magnesium silicate, thereby improving the eco-friendliness, impact resistance, rigidity, appearance characteristics, etc. of the polypropylene resin composition and reducing odor-inducing components and volatile organic compounds. A zeolite including two or more of zeolite 3A, zeolite 4A, and zeolite 5A can be used.

[0062] In general, zeolites are zeolite 4A (cation K) structures with a pore size of about 4 Å. + ) is synthesized, and the zeolite 4A is subjected to an ion substitution process to obtain zeolite 3A (cation Na) having a pore size of about 3 Å. + ), zeolite 5A (cation Ca) with a pore size of about 5 Å 2+) can be synthesized. For example, it is difficult for zeolite 4A, which has a pore size of about 4 Å, to adsorb low-molecular substances having a size of 4 Å or more, and considering the size of a wide range of odor-inducing substances, two or three types of zeolites having different pore sizes can be appropriately mixed and prescribed to achieve the optimal odor-inducing component and volatile organic compound reduction effect. When two types of zeolites are mixed, the content of each may be about 30 to about 70 wt%, and when three types of zeolites are mixed, the content of each may be about 20 to about 40 wt%, but is not limited thereto.

[0063] In a specific example, the zeolite may be included in an amount of about 1 to about 10 parts by weight, for example, about 3 to about 6 parts by weight, based on about 100 parts by weight of the base material. If the content of the zeolite is less than about 1 part by weight based on about 100 parts by weight of the base material, there is a concern that the rigidity of the polypropylene resin composition, the effect of reducing odor-inducing components and volatile organic compounds, etc. may be reduced, and if it exceeds about 10 parts by weight, there is a concern that the appearance characteristics, lightness, etc. of the polypropylene resin composition may be reduced.

[0064]

[0065] (F) Magnesium silicate

[0066] Magnesium silicate according to one specific example of the present invention can be applied to the polypropylene resin and the recycled polypropylene resin together with maleic anhydride modified polypropylene, glass fiber, and the two or three types of zeolites, etc., thereby improving the eco-friendliness, impact resistance, rigidity, etc. of the polypropylene resin composition and reducing odor-inducing components and volatile organic compounds. Magnesium silicate used in a typical thermoplastic resin composition can be used.

[0067] In a specific example, the magnesium silicate may have an average particle size of about 10 to about 40 μm, for example, about 13 to about 36 μm. Within this range, odor-inducing components and volatile organic compounds of the polypropylene resin composition can be reduced. Here, the average particle size of the magnesium silicate was determined by obtaining a particle size distribution using a laser diffraction scattering method, and the particle diameter at 50% of the accumulated value was used as the average particle size.

[0068] In a specific example, the magnesium silicate may be included in an amount of about 0.5 to about 3 parts by weight, for example, about 1 to about 2.5 parts by weight, based on about 100 parts by weight of the base material. If the content of the magnesium silicate is less than about 0.5 parts by weight based on about 100 parts by weight of the base material, there is a concern that the rigidity of the polypropylene resin composition, the effect of reducing odor-inducing components and volatile organic compounds, etc. may be reduced, and if it exceeds about 3 parts by weight, there is a concern that the appearance characteristics, lightness, etc. of the polypropylene resin composition may be reduced.

[0069] In a specific example, the weight ratio of the zeolite and the magnesium silicate may be from about 1:0.2 to about 1:1, for example from about 1:0.2 to about 1:0.6. In this range, the mechanical properties, appearance characteristics, odor-inducing components, and volatile organic compounds reduction effects of the polypropylene resin composition may be more excellent.

[0070]

[0071] (G) Fragrance masterbatch

[0072] A polypropylene resin composition according to one specific embodiment of the present invention may further include a fragrance masterbatch to enhance the odor reduction effect. Examples of the fragrance masterbatch include, but are not limited to, commercially available baby powder, lavender, and mixtures thereof.

[0073] In a specific example, when using the fragrance masterbatch, the content may be about 0.1 to about 1 part by weight, for example, about 0.15 to about 0.25 parts by weight, based on about 100 parts by weight of the base material. Within the above range, the odor reduction effect of the polypropylene resin composition can be improved without deteriorating other physical properties.

[0074]

[0075] 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, antioxidants, impact modifiers, flame retardants, anti-drip agents, release agents, nucleating agents, UV stabilizers, pigments, dyes, and mixtures thereof.

[0076] 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 0.1 to about 10 parts by weight, based on about 100 parts by weight of the base material, but is not limited thereto.

[0077]

[0078] 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 180 to about 320°C, for example, about 240 to about 300°C, using a conventional twin-screw extruder.

[0079] In a specific example, the polypropylene resin composition may have a content of the recycled polypropylene resin of about 13 wt% or more based on 100 wt% of the total polypropylene resin composition. Within this range, the polypropylene resin composition can be made environmentally friendly, has excellent impact resistance, rigidity, and a balance of physical properties thereof, and can reduce odor-causing components and volatile organic compounds.

[0080] In a specific example, the polypropylene resin composition has a notched Izod impact strength of about 11 to about 20 kJ / m for a specimen measuring 80 mm × 10 mm × 4 mm at 23° C. according to ISO 180. 2 , for example, about 11.1 to about 16 kJ / m 2 It could be.

[0081] In a specific example, the polypropylene resin composition has an unnotched Charpy impact strength of about 34 to about 45 kJ / m on a specimen measuring 80 mm × 10 mm × 4 mm at 23°C, as measured according to ISO 179-1eU. 2 , for example, about 35 to about 43 kJ / m 2 It could be.

[0082] In a specific example, the polypropylene resin composition may have a tensile strength of about 92 to about 110 MPa, for example, about 93 to about 105 MPa, of an ISO 527-1A specimen measured under a temperature condition of 23°C and a crosshead speed condition of 5 mm / min according to ISO 527.

[0083] In a specific example, the polypropylene resin composition may have a flexural strength of about 137 to about 160 MPa, for example, about 137 to about 150 MPa, of a specimen measuring 80 mm × 10 mm × 4 mm in size, measured under a crosshead speed condition of 2 mm / min according to ISO 178.

[0084] In a specific example, in a specific example, the polypropylene resin composition may have a flexural modulus of about 7,000 to about 7,500 MPa, for example, about 7,010 to about 7,450 MPa, of a specimen measuring 80 mm × 10 mm × 4 mm in size, measured under a crosshead speed condition of 2 mm / min according to ISO 178.

[0085] In a specific example, the polypropylene resin composition may have a total volatile organic compound (TVOC) detection area value of about 600 to about 750 area / g, for example, about 630 to about 740 area / g, of 2 g of a sample collected and measured by HS-SPME GC / MS at 120°C for 60 minutes according to VDA 277.

[0086] In a specific example, the polypropylene resin composition is measured under 80°C / 2 hr and B3 (dry) conditions according to VDA 270, with a specimen length of 40 cm. 3 / 2L may have an odor rating of about 2.5 to about 3.5.

[0087]

[0088] 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.

[0089] In a specific example, the molded product is environmentally friendly and has excellent impact resistance, rigidity, and appearance properties by using recycled polypropylene resin, and can reduce odor-causing components and volatile organic compounds, and is therefore useful as interior and exterior materials for automobiles, interior and exterior materials for electrical and electronic products, and is particularly useful as interior materials for automobiles.

[0090]

[0091] 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.

[0092]

[0093] Example

[0094] Below, the specifications of each component used in the examples and comparative examples are as follows.

[0095] (A) Polypropylene resin

[0096] Homopolypropylene resin (H-PP, manufacturer: Lotte Chemical, product name: J-190, melt-flow index: approximately 120 g / 10 min) was used.

[0097] (B) Regenerated polypropylene resin

[0098] Regenerated polypropylene resin (Manufacturer: Woori Pla, Product Name: R-170LC, Melt-flow index: approximately 30 g / 10 min) was used.

[0099] (C) Maleic anhydride modified polypropylene

[0100] Maleic anhydride-modified polypropylene (Manufacturer: Lotte Chemical, Product name: CM1120H, Maleic anhydride graft ratio: approximately 1 wt%) was used.

[0101] (D) Glass fiber

[0102] Long glass fiber (manufacturer: Owens-corning, product name: SE4121, cross-sectional diameter: approximately 17 ㎛) was used.

[0103] (E) Zeolite

[0104] (E1) Zeolite 3A (manufacturer: Jisimtech, product name: JST-MS30, pore size: approximately 3 Å) was used.

[0105] (E2) Zeolite 4A (manufacturer: Jisimtech, product name: JST-MS40, pore size: approximately 4 Å) was used.

[0106] (E3) Zeolite 5A (manufacturer: Jisimtech, product name: JST-MS50, pore size: approximately 5 Å) was used.

[0107] (F) Magnesium silicate

[0108] Magnesium silicate (Manufacturer: Giant Chemical, Product name: SEAWARDSOL 300) was used.

[0109] (G) Fragrance masterbatch

[0110] Baby powder scent (manufacturer: Samjin Polytech) was used.

[0111]

[0112] Examples 1 to 15 and Comparative Examples 1 to 15

[0113] Each of the above components was added in the amounts shown in Tables 2, 3, 4, and 5 below, and then extruded at about 250°C to produce pellets. The extrusion was performed using a twin-screw extruder with an L / D of 40 and a diameter of 75 mm. The manufactured pellets were dried at about 80°C for about 2 hours or more, and then injected into a 110-ton injection molding machine (molding temperature: about 230°C, mold temperature: about 40°C) to produce test pieces. The physical properties of the manufactured test pieces were evaluated using the following methods, and the results are shown in Tables 2, 3, 4, and 5 below.

[0114]

[0115] Method of measuring physical properties

[0116] (1) Notched Izod impact strength (unit: kJ / m) 2 ): According to ISO 180, the notched Izod impact strength of specimens measuring 80 mm × 10 mm × 4 mm at 23°C was measured.

[0117] (2) Unnotched Charpy impact strength (unit: kJ / m) 2 ): According to ISO 179-1eU, the unnotched Charpy impact strength of 80 mm × 10 mm × 4 mm sized specimens measured at 23℃ was measured.

[0118] (3) Tensile strength (unit: MPa): The tensile strength of the ISO 527-1A specimen was measured under the conditions of a temperature of 23℃ and a crosshead speed of 5 mm / min according to ISO 527.

[0119] (4) Flexural strength (unit: MPa): According to ISO 178, the flexural strength of a specimen measuring 80 mm × 10 mm × 4 mm was measured under a crosshead speed of 2 mm / min.

[0120] (5) Flexural modulus (unit: MPa): The flexural modulus of a specimen measuring 80 mm × 10 mm × 4 mm was measured under a crosshead speed of 2 mm / min according to ISO 178.

[0121] (6) Total volatile organic compounds (TVOC) detection area value: According to VDA 277, the total volatile organic compounds detection area value (unit: area / g) of the sample collected at 120°C for 60 minutes was measured using HS-SPME GC / MS (headspace solid-phase microextraction coupled to gas chromatography / mass spectrometry). The measurement conditions and pretreatment method are as follows.

[0122] - Measurement conditions

[0123] Parameters conditions HSS Headspace Sampler Agilent GC-7697 AM Method Requested conditions (Temperature: 120℃, Capture time: 60 min) GC Column DB-5 (ID 0.25 mm, L 30 m, film thickness 0.25 ㎛) Mobile phase He Pressure 19.4 psi Flow 2.0 ml / min (Average velocity = 32 cm / sec) Split Split ratio = 20:1 Method 40℃ 3 min → 200℃ 4 min (R=12℃ / min) Detector FID

[0124] - Preprocessing method

[0125] 1) Place the sample (2 g of pellet) into an HSS vial.

[0126] 2) Set the Headspace Sampler conditions as above.

[0127] (7) Odor evaluation: According to VDA 270, 40 cm of specimen at 80℃ / 2hr and B3 (dry) conditions 3 / 2L odor evaluation grade was measured. Here, the lower the odor evaluation grade, the better the low-odor performance.

[0128] (8) Appearance evaluation: For the surface of the injection molded specimen measuring 40 mm × 250 mm × 2 mm, the number of fiber clumps with a length of 0.3 cm or more visible to the naked eye was checked. (○: 30 or fewer fiber clumps visible, △: 31 to 50 fiber clumps visible, ×: More than 50 fiber clumps visible)

[0129]

[0130] Example 1234567 (A) (weight%) 50617061616161 (B) (weight%) 50393039393939 (C) (weight parts) 4.54.54.5184.54.5 (D) (weight parts) 47.747.747.747.747.74060 (E1) (weight parts) 1.61.61.61.61.61.61.61.6 (E2) (weight parts) 1.61.61.61.61.61.61.6 (E3) (weight parts) 1.61.61.61.61.61.61.61.6 (F) (weight parts) 1.61.61.61.61.61.61.6 (G) (weight parts) --- Notched Izod impact strength (kJ / m 2 )11.212.113.211.412.911.114.7Unnotched Charpy impact strength (kJ / m) 2)35.537.639.536.940.235.142.5Tensile strength (MPa)939497939693104Flexural strength (MPa)137139145137141137149Flexural modulus (MPa)7,2427,1387,1457,1647,1037,0427,485TVOC (area / g)730698654684738734678Odor evaluation (grade)3.5333333Appearance evaluation○○○○○○○

[0131] * Weight parts: Weight parts per 100 weight parts of base material (A+B)

[0132]

[0133] Example 89101112131415(A) (Wt%)616161616161616161(B) (Wt%)393939393939393939(C) (Wt)4.54.54.54.54.54.54.54.54.5(D) (Wt)47.747.747.747.747.747.747.747.7(E1) (Wt)121.61.62.42.4-1.6(E2) (Wt)121.61.62.4-2.41.6(E3) (Wt)121.61.6-2.42.41.6(F) (Wt)1.61.612.51.61.61.61.6(G) (weight part)-------0.2 notch Izod impact strength (kJ / m 2 )11.712.412.112.11212.112.312Unnotched Charpy impact strength (kJ / m 2 )37.138.237.537.737.537.437.837.5Tensile strength (MPa)9396949593939593Flexural strength (MPa)137141139140138138140139Flexural modulus (MPa)7,1347,1457,1417,1527,1357,1347,1377,132TVOC (area / g)728641705674670728696712Odor evaluation (grade)3.53333.533.52.5Appearance evaluation○○○○○○○○

[0134] * Weight parts: Weight parts per 100 weight parts of base material (A+B)

[0135]

[0136] Comparative Example 12345678(A) (Wt%) 4080616161616161(B) (Wt%) 6020393939393939(C) (Wt%) 4.54.50.3124.54.54.54.5(D) (Wt%) 47.747.747.747.7257047.747.7(E1) (Wt%) 1.61.61.61.61.61.60.23.5(E2) (Wt%) 1.61.61.61.61.61.60.23.5(E3) (Wt%) 1.61.61.61.61.61.60.23.5(F) (parts by weight)1.61.61.61.61.61.61.61.61.6(G) (parts by weight)--------Notched Izod impact strength (kJ / m 2 )10.515.110.513.17.515.411.612.8Unnotched Charpy impact strength (kJ / m) 2 )34.340.534.740.928.845.236.538.7Tensile strength (MPa)87988998791079196Flexural strength (MPa)132148135143128153136142Flexural modulus (MPa)7,3457,1457,1536,9874,9877,6817,1267,587TVOC (area / g)8145877027688127741,057551Odor evaluation (grade)3.53343.53.543Appearance evaluation○○○○○○○×

[0137] * Weight parts: Weight parts per 100 weight parts of base material (A+B)

[0138]

[0139] Comparative Example 9101112131415(A) (Wt%)6161616161616161(B) (Wt%)3939393939393939(C) (Wt)4.54.54.54.54.54.54.54.5(D) (Wt)47.747.747.747.747.747.747.7(E1) (Wt)1.61.6-6.4---(E2) (Wt)1.61.6--6.4--(E3) (Wt)1.61.6---6.4-(F) (Wt)0.15----6.4(G) (Wt)-------Notched Izod impact strength (kJ / m) 2)11.812.311.511.712.411.811.6Unnotched Charpy impact strength (kJ / m) 2 )36.537.936.336.838.136.936.8Tensile strength (MPa)93959091959491Flexural strength (MPa)138140135136140138135Flexural modulus (MPa)6,9877,5127,1207,1247,1257,1417,141TVOC (area / g)7885871,5277528377751,045Odor evaluation (grade)434.5443.53.5Appearance evaluation○×○○○○○

[0140] * Weight parts: Weight parts per 100 weight parts of base material (A+B)

[0141]

[0142] From the above results, it can be seen that the polypropylene resin composition of the present invention is environmentally friendly by using a recycled polypropylene resin in a certain amount or more (13 wt% or more of the total composition 100 wt%), and has excellent impact resistance (notched Izod impact strength, unnotched Charpy impact strength), rigidity (tensile strength, flexural strength, flexural modulus), and appearance characteristics (evaluation of the number of fiber clumps in appearance). In addition, it can be seen that odor-causing components and volatile organic compounds can be reduced.

[0143] On the other hand, when the content of the polypropylene resin is less than the range of the present invention and the content of the recycled polypropylene resin exceeds the range of the present invention (Comparative Example 1), it can be seen that the impact resistance, rigidity, and the effect of reducing volatile organic compounds are reduced, and when the content of the polypropylene resin exceeds the range of the present invention and the content of the recycled polypropylene resin is less than the range of the present invention (Comparative Example 2), it can be seen that the content of the recycled polypropylene resin is 12.6 wt% of the total composition, which is not suitable for the present invention that aims at environmental friendliness. In the case of Comparative Example 3, where the content of maleic anhydride-modified polypropylene is less than the range of the present invention, it can be seen that impact resistance, rigidity, etc. are reduced, and in the case of Comparative Example 4, where the content of maleic anhydride-modified polypropylene is more than the range of the present invention, it can be seen that rigidity, the effect of reducing odor-inducing components, etc. are reduced, and in the case of Comparative Example 5, where the content of glass fiber is less than the range of the present invention, it can be seen that impact resistance, rigidity, the effect of reducing volatile organic compounds, etc. are reduced, and in the case of Comparative Example 6, where the content of glass fiber is more than the range of the present invention, the effect of reducing volatile organic compounds, etc. are reduced.In the case of Comparative Example 7, where the content of zeolite is less than the range of the present invention, it can be seen that the stiffness, the effect of reducing odor-inducing components and volatile organic compounds, etc. are reduced, and in the case of Comparative Example 8, where the content of zeolite is more than the range of the present invention, it can be seen that the appearance characteristics, lightness, etc. are reduced, and in the case of Comparative Example 9, where the content of magnesium silicate is less than the range of the present invention, it can be seen that the stiffness, the effect of reducing odor-inducing components and volatile organic compounds, etc. are reduced, and in the case of Comparative Example 10, where the content of magnesium silicate is more than the range of the present invention, it can be seen that the appearance characteristics, lightness, etc. are reduced, and in the case of Comparative Example 11, where neither zeolite nor magnesium silicate was applied, it can be seen that the stiffness, the effect of reducing odor-inducing components and volatile organic compounds, etc. are reduced, and in the case of Comparative Example 12, where only zeolite 3A was applied among zeolite and magnesium silicate, the stiffness, the effect of reducing odor-inducing components and volatile organic compounds, etc. are reduced. It can be seen that the reduction effect of odor-causing components and volatile organic compounds is reduced in Comparative Example 13, in which only zeolite 4A is applied among zeolite and magnesium silicate, and in Comparative Example 14, in which only zeolite 5A is applied among zeolite and magnesium silicate, it can be seen that the reduction effect of volatile organic compounds is reduced, and in Comparative Example 15, in which zeolite is not applied and magnesium silicate is applied in excess, it can be seen that the rigidity, the reduction effect of volatile organic compounds, etc. are reduced.

[0144]

[0145] 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 a base material comprising about 45 to about 75 wt% of a polypropylene resin and about 25 to about 55 wt% of a recycled polypropylene resin; About 1 to about 10 parts by weight of maleic anhydride modified polypropylene; About 30 to about 65 parts by weight of glass fiber; About 1 to about 10 parts by weight of a zeolite comprising two or more of zeolite 3A, zeolite 4A, and zeolite 5A; and A polypropylene resin composition comprising about 0.5 to about 3 parts by weight of magnesium silicate.

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 or 2, characterized in that the polypropylene resin has a melt-flow index of about 10 to about 1,500 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 any one of claims 1 to 3, wherein the recycled polypropylene resin has a melt-flow index of about 10 to about 150 g / 10 min, measured under conditions of 230°C and 2.16 kg load, according to ASTM D1238.

5. A polypropylene resin composition according to any one of claims 1 to 4, wherein the maleic anhydride-modified polypropylene has a graft ratio of maleic anhydride of about 0.5 to about 5 wt%.

6. A polypropylene resin composition according to any one of claims 1 to 5, wherein the weight ratio of the zeolite and the magnesium silicate is about 1:0.2 to about 1:

1.

7. A polypropylene resin composition according to any one of claims 1 to 6, characterized in that the polypropylene resin composition further comprises about 0.1 to about 1 part by weight of a fragrance masterbatch based on about 100 parts by weight of the base material.

8. A polypropylene resin composition according to any one of claims 1 to 7, characterized in that the content of the recycled polypropylene resin is about 13 wt% or more out of 100 wt% of the total polypropylene resin composition.

9. In any one of claims 1 to 8, the polypropylene resin composition has a notched Izod impact strength of about 11 to about 20 kJ / m for a specimen measuring 80 mm × 10 mm × 4 mm at 23°C, as measured according to ISO 180. 2 A polypropylene resin composition characterized by:

10. In any one of claims 1 to 9, the polypropylene resin composition has an unnotched Charpy impact strength of about 35 to about 45 kJ / m for a specimen measuring 80 mm × 10 mm × 4 mm, measured at 23°C, according to ISO 179-1eU. 2 A polypropylene resin composition characterized by:

11. A polypropylene resin composition according to any one of claims 1 to 10, characterized in that the tensile strength of an ISO 527-1A specimen measured under a temperature condition of 23°C and a crosshead speed condition of 5 mm / min according to ISO 527 is about 92 to about 110 MPa.

12. A polypropylene resin composition according to any one of claims 1 to 11, wherein the polypropylene resin composition has a flexural strength of about 137 to about 160 MPa for a specimen measuring 80 mm × 10 mm × 4 mm when measured under a crosshead speed condition of 2 mm / min according to ISO 178, and a flexural modulus of about 7,000 to about 7,500 MPa for a specimen measuring 80 mm × 10 mm × 4 mm when measured under a crosshead speed condition of 2 mm / min according to ISO 178.

13. A polypropylene resin composition according to any one of claims 1 to 12, wherein the polypropylene resin composition has a total volatile organic compound (TVOC) detection area value of about 600 to about 750 area / g of a sample 2 g collected and measured by HS-SPME GC / MS at 120°C for 60 minutes in accordance with VDA 277.

14. In any one of the first to 13th clauses, the polypropylene resin composition is a 40 cm specimen measured under 80°C / 2 hr and B3 (dry) conditions according to VDA 270. 3 / 2L polypropylene resin composition characterized in that the odor evaluation grade is about 2.5 to about 3.

5.

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