WO2004065481A1 - Sound absorbing polypropylene resin composition with excellent impact resistance - Google Patents
Sound absorbing polypropylene resin composition with excellent impact resistance Download PDFInfo
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- WO2004065481A1 WO2004065481A1 PCT/KR2004/000067 KR2004000067W WO2004065481A1 WO 2004065481 A1 WO2004065481 A1 WO 2004065481A1 KR 2004000067 W KR2004000067 W KR 2004000067W WO 2004065481 A1 WO2004065481 A1 WO 2004065481A1
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- polypropylene resin
- resin composition
- sound absorbing
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- talc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
Definitions
- the present invention relates to a polypropylene resin composition with excellent impact resistance and a sound absorbing property, more particularly to a polypropylene resin composition having a excellent sound absorbing property while maintaining good impact and heat resistance, by adding a mixture of talc and barium sulfate as a sound absorbing component to a polypropylene resin which is a base resin.
- Polypropylene resin is a kind of plastics which is widely used in the fields of automotives, electric parts, etc. as an injection molded article, a film or a blow molded article, owing to its excellent processing property, chemical resistance, weatherability, high slip flow property, etc.
- various grades of multi-functionalized polypropylene resin imparted with flame retardancy, heat resistance, high rigidity, high impact resistance, or long-term weatherability and the like have been found and it has been attempted to develop various new applications of such polypropylene resin, particularly in construction and industrial materials.
- noises are predominantly occurred between floors and can be largely classified into: sounds from other floors through a ceiling/floor with an insufficient thickness of concrete; and sounds occurred from a drain/soil pipe used in a building construction, for example, pipes applied to a bath tub, sink, and bathroom, vertical piping and underground horizontal piping in apartment.
- PNC pipes polyvinyl chloride pipes
- NG1 and NG2 polyvinyl chloride pipes
- the object of the invention is to solve above-mentioned problems of prior art, particularly to provide a polypropylene resin composition with excellent sound absorbing property as well as good heat and impact resistance by adding a mixture of talc/barium sulfate to polypropylene resin in an appropriate ratio.
- the polypropylene resin composition according to the present invention is characterized by comprising 50-70% by weight of polypropylene resin and 30-50% by weight of a mixture of talc/barium sulfate.
- Polypropylene resin which may be used in the composition of the present invention is selected from the group consisting of syndiotactic polypropylene homopolymer, isotactic polypropylene homopolymer, propylene-ethylene random copolymer and propylene-ethylene block copolymer, and propylene-ethylene block copolymer or propylene-ethylene random copolymer is preferred.
- isotactic polypropylene homopolymer it is preferred to use crystalline polypropylene homopolymer having 0.80-0.99, preferably 0.90-0.99 of isotactic pentad ratio determined by 13C-NMR
- propylene-ethylene random copolymer As for the propylene-ethylene random copolymer, it is preferred to use propylene-ethylene random copolymer having 2-10 kg • cm/cm of Izod impact strength at room temperature in view of mechanical properties and extrusion processability, and as for the propylene-ethylene block copolymer, it is preferred to use impact copolymer having not less than 11 kg • cm/cm, more preferably not less than 50 kg • cm/cm of Izod impact strength at room temperature in view of mechanical properties, extrusion processability, formability, impact resistance, and the like.
- Any polypropylene resin used in the present invention should have melt index within the range of 0.1-60 g/10 minutes, determined by ASTM D1238 (230 ° C, 2.16 kg load) regardless of its types.
- melt index is lower than 0.1 g/10 minutes, injection moldability becomes worse and deterioration in appearances such as flow marks and the like occurs.
- melt index is higher than 60 g/10 minutes, injection moldability would be satisfactory but extrusion moldability becomes worse and impact resistance is drastically deteriorated.
- the amount of the polypropylene resin used in the composition of the present invention is preferably in the range of 50-70 % by weight of the composition.
- the mixing weight ratio of the talc/barium sulfate mixture used in the composition of the present invention is preferably in the range of 1 :9 to 9: 1.
- Such mixing weight ratio as well as content of the talc/barium sulfate mixture in the composition of the present invention has an important role in developing a sound absorbing property, further significantly affects on the processability and surface appearance of the resulting product.
- Preferred amount of the talc/barium sulfate mixture used in the resin composition of the present invention is 30-50 wt %, wherein the mixing weight ratio of the mixture is in the range of 1:9 to 9:1.
- the amount is less than 30 wt %, improvement of the sound absorbing property cannot be expected, while the amount is greater than 50 wt %, it is disadvantageous in that product molding becomes undesirably difficult, and the weight is increased.
- the resin composition of the present invention may further comprise at least one selected from primary and secondary antioxidants, lubricants, and slip agents in an amount of the range of 0.1 to 50 parts by weight, per 100 parts by weight of the total of the polypropylene resin and the talc/barium sulfate mixture.
- plasticizers heat stabilizers, light stabilizers and the like may be added to the polypropylene resin composition of the present invention, and organic or inorganic pigments, dyes and the like may be added within the scope in which the object of the present invention can be accomplished.
- the polypropylene resin composition of the present invention can be prepared by mixing the above-mentioned components in molten state using, for example, a twin-screw extruder under the generally known processing condition.
- the polypropylene resin composition prepared thereby may be, after being sufficiently dried, molded into a drain/soil pipe (straight or joint pipe) by extrusion or injection molding with a conventional pipe forming machine.
- the present invention will be further illustrated in detail with following Examples and Comparative examples. However, the following Examples intend only to exemplify embodiments of the present invention, by no means limiting the scope of the invention.
- MI Melt Index
- Hardness was measured according to ASTM D2240, by applying a load of 10 N to a DUROMETER A type hardness tester vertically downward and measuring hardness after a certain period of time (30 seconds).
- Tensile strength and elongation Tensile strength and elongation were measured according to ASTM D412, with a test sample of 2 ⁇ 0.5mm thick using a tensile tester at a rate of 50 mm/min. 6) Vicat softening temperature: Nicat softening temperature was measured according to JIS-K7206 for indicating the heat resistance. High Nicat softening temperature indicates good heat resistance.
- Flexural strength was measured according to ASTM D790, by applying loads to bend a test sample at a rate of 5 mm/min, and reporting a maximum load when no further load was applied.
- Flexural modulus was determined from the gradient of the initial linear range present on a load-bending strength curve (at a rate of 5 mm/min) according to ASTM D790.
- Izod impact strength was measured according to ASTM D256, using a test sample with a 3.2 mm thickness prepared by injection molding.
- polypropylene resin, sound absorbing material, and other additives were subjected to a twin-screw extruder wherein the screws rotated in the same direction, mixed in melt, and extruded in pelletized form.
- the pellet-formed resin was vacuum-dried at 80 ° C .
- PP impact copolymer having not less than 50 kg • cm/cm of Izod impact strength at room temperature (Trade name: BBllO ; Samsung General Chemicals Co., Ltd.)
- the resin composition comprised of polypropylene resin and talc/barium sulfate as a sound absorbing material shows good processability while maintaining excellent heat and impact resistances, and a sound absorbing property, also being advantageous in terms of weight.
- the polypropylene resin composition according to the present invention shows an improving effect on heat and impact resistance, and a sound absorbing property, by comprising a mixture of talc/barium sulfate therein.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
Disclosed is a sound absorbing polypropylene resin composition with excellent impact resistance which comprises 50-70 % by weight of polypropylene resin and 30-50 % by weight of mixture of talc/barium sulfate. Since the polypropylene resin composition of the present invention has high heat and impact resistance, and shows excellent sound absorbing property, the polypropylene resin composition can be used in producing sound absorbing pipes which are used as construction materials for house or apartment where noise insulation is required.
Description
SOUND ABSORBING POLYPROPYLENE RESIN COMPOSITION WITH EXCELLENT IMPACT RESISTANCE
Technical Field
The present invention relates to a polypropylene resin composition with excellent impact resistance and a sound absorbing property, more particularly to a polypropylene resin composition having a excellent sound absorbing property while maintaining good impact and heat resistance, by adding a mixture of talc and barium sulfate as a sound absorbing component to a polypropylene resin which is a base resin.
Background Art
Polypropylene resin is a kind of plastics which is widely used in the fields of automotives, electric parts, etc. as an injection molded article, a film or a blow molded article, owing to its excellent processing property, chemical resistance, weatherability, high slip flow property, etc. In recent years, various grades of multi-functionalized polypropylene resin imparted with flame retardancy, heat resistance, high rigidity, high impact resistance, or long-term weatherability and the like have been found and it has been attempted to develop various new applications of such polypropylene resin, particularly in construction and industrial materials. With increasing demand for more pleasantness and high-quality of dwelling environment due to various changes in life style, environment- friendly aspects in dwelling conditions of a house or an apartment, such as less pollution, less noise and the like have been emphasized as well as convenience in various aspects due to multi-functionalized housing condition. Particularly, involvement of an environmental aspect in living conditions is being significantly considered, thus there are demands for less noise from
surroundings as well as environment-friendly elements such as pleasant air, clean water or woods.
In an aspect to noise problems which have been recently recognized as a social problem, noises are predominantly occurred between floors and can be largely classified into: sounds from other floors through a ceiling/floor with an insufficient thickness of concrete; and sounds occurred from a drain/soil pipe used in a building construction, for example, pipes applied to a bath tub, sink, and bathroom, vertical piping and underground horizontal piping in apartment.
For drain/soil pipes applied to apartment construction, polyvinyl chloride pipes (PNC pipes, rigid type pipes for drainage) are mainly used. PNC pipes used for drain/soil pipes can be largely classified into NG1 and NG2, and there are some differences between the properties of the two, and such differences are served as determining factors of the cost difference between the two. Since NG1 type is rather thick, and heavy in weight, thus expensive, NG2 type PNC pipes are predominantly used for drain/soil pipe. With respect to the properties of those PNC resins which are widely used for pipes in construction, it is known that their sound absorbing or proofing property is rather unsatisfactory, heat resistance is as low as approximately 70 °C, Izod value (at room temperature, notched) representing impact resistance is significantly as low as 2.5, and flexural modulus representing rigidity is approximately 28,000 kg/ciif . In order to solve such problems, there have been attempts to introduce glass fibers as a sound absorbing and proofing material into a PNC pipe, or to adopt a spin structure, three-layer-wall structure, and the like to a PNC pipe (See, Japanese Patent Application Laid-Open No. Hei 5-272691 and Japanese Patent Application Laid-Open No. Hei 6- 174175). With consideration of the increased construction cost, however, those attempts above-mentioned do not provide a sufficient sound proofing effect, together with heat
resistance and impact resistance. Also, a cast iron pipe has poor installation properties and durability, and it is expensive.
It is reported that 50 -75% of barium sulfate alone has been introduced as an inorganic filler into polypropylene copolymer (Korean Patent Application Laid-Open No. 1999-000188). However, this technique has many disadvantages in that it is difficult to form a pipe since the inorganic material has high hygroscopic property providing difficulties in processing, it also has high specific gravity owing to the inorganic material contained therein, and even though charged with a large amount of such inorganic materials, it has low impact strength, low heat resistance, and low hardness so that a pipe made therefrom tends to be easily deformed, and it is expensive.
Therefore, there still has been demand for a pipe forming material with excellent sound absorbing property, and heat and impact resistance as well as the easiness in recycling, hence being environmental-friendly, so that the noise problem of conventional PNC pipe and the cost problem of cast iron pipe can be solved.
Disclosure of the Invention
The object of the invention is to solve above-mentioned problems of prior art, particularly to provide a polypropylene resin composition with excellent sound absorbing property as well as good heat and impact resistance by adding a mixture of talc/barium sulfate to polypropylene resin in an appropriate ratio.
The polypropylene resin composition according to the present invention is characterized by comprising 50-70% by weight of polypropylene resin and 30-50% by weight of a mixture of talc/barium sulfate.
Polypropylene resin which may be used in the composition of the present invention is selected from the group consisting of syndiotactic polypropylene
homopolymer, isotactic polypropylene homopolymer, propylene-ethylene random copolymer and propylene-ethylene block copolymer, and propylene-ethylene block copolymer or propylene-ethylene random copolymer is preferred. As for the isotactic polypropylene homopolymer, it is preferred to use crystalline polypropylene homopolymer having 0.80-0.99, preferably 0.90-0.99 of isotactic pentad ratio determined by 13C-NMR
(Nuclear Magnetic Resonance Spectroscopy). As for the propylene-ethylene random copolymer, it is preferred to use propylene-ethylene random copolymer having 2-10 kg • cm/cm of Izod impact strength at room temperature in view of mechanical properties and extrusion processability, and as for the propylene-ethylene block copolymer, it is preferred to use impact copolymer having not less than 11 kg • cm/cm, more preferably not less than 50 kg • cm/cm of Izod impact strength at room temperature in view of mechanical properties, extrusion processability, formability, impact resistance, and the like. Any polypropylene resin used in the present invention should have melt index within the range of 0.1-60 g/10 minutes, determined by ASTM D1238 (230 °C, 2.16 kg load) regardless of its types. When the melt index is lower than 0.1 g/10 minutes, injection moldability becomes worse and deterioration in appearances such as flow marks and the like occurs. On the contrary, when the melt index is higher than 60 g/10 minutes, injection moldability would be satisfactory but extrusion moldability becomes worse and impact resistance is drastically deteriorated. The amount of the polypropylene resin used in the composition of the present invention is preferably in the range of 50-70 % by weight of the composition. When the amount is less than 50 % by weight, it is difficult to form a product, while the amount is greater than 70 % by weight, the sound absorbing property cannot be improved since the amount of talc/barium sulfate mixture becomes insufficient and, further, heat and impact resistance becomes worse.
The mixing weight ratio of the talc/barium sulfate mixture used in the composition of the present invention is preferably in the range of 1 :9 to 9: 1. Such mixing weight ratio as well as content of the talc/barium sulfate mixture in the composition of the present invention has an important role in developing a sound absorbing property, further significantly affects on the processability and surface appearance of the resulting product.
Preferred amount of the talc/barium sulfate mixture used in the resin composition of the present invention is 30-50 wt %, wherein the mixing weight ratio of the mixture is in the range of 1:9 to 9:1. When the amount is less than 30 wt %, improvement of the sound absorbing property cannot be expected, while the amount is greater than 50 wt %, it is disadvantageous in that product molding becomes undesirably difficult, and the weight is increased. With regard to the mixing weight ratio of the talc/barium sulfate mixture, when the ratio is less than 1 :9, improvement of the sound absorbing property cannot be expected, while the ratio is greater than 9:1, the improvement of the sound absorbing property could be expected but the processing becomes difficult and the surface appearance of the resulting product becomes poor.
Further, in case either talc or barium sulfate is absent from the mixture, when barium sulfate is singly used in the composition of the present invention, the sound absorbing property is appeared to be rather superior compared with the case of talc being singly used, however, product molding becomes difficult due to its high hygroscopic property. On the contrary, when talc is singly used in the composition of the present invention, the heat resistance is appeared to be rather superior compared with the case of barium sulfate being singly used, however, it has a problem in product molding due to the poor surface appearance. Owing to such problems described just above, the single use of either talc or barium sulfate will significantly deteriorate the sound absorbing property, and heat and impact resistance, compared with the case of both of the two being used together.
The resin composition of the present invention, optionally, may further comprise at least one selected from primary and secondary antioxidants, lubricants, and slip agents in an amount of the range of 0.1 to 50 parts by weight, per 100 parts by weight of the total of the polypropylene resin and the talc/barium sulfate mixture. Furthermore, if necessary, plasticizers, heat stabilizers, light stabilizers and the like may be added to the polypropylene resin composition of the present invention, and organic or inorganic pigments, dyes and the like may be added within the scope in which the object of the present invention can be accomplished.
The polypropylene resin composition of the present invention can be prepared by mixing the above-mentioned components in molten state using, for example, a twin-screw extruder under the generally known processing condition. The polypropylene resin composition prepared thereby may be, after being sufficiently dried, molded into a drain/soil pipe (straight or joint pipe) by extrusion or injection molding with a conventional pipe forming machine. The present invention will be further illustrated in detail with following Examples and Comparative examples. However, the following Examples intend only to exemplify embodiments of the present invention, by no means limiting the scope of the invention.
Best Mode for Carrying Out the Invention Examples and Comparative Examples
[Measurement of Physical Properties]
1) Melt Index (MI) : Melt index was measured as a flow rate (g/min) of the resin at 230 °C under a load of 2.16 kg, according to ASTM D1238.
2) Specific gravity: Specific gravity was determined by using buoyancy in liquid according to ASTM D 1505
3) HDT : HDT was measured with a test sample of a 127mm length, 12.7 mm width and 6.4 mm thickness prepared by injection molding. The measurement was carried out under a load of 4.6 and 18.5 kgf/cin2 according to ASTM D648.
4) Hardness: Hardness was measured according to ASTM D2240, by applying a load of 10 N to a DUROMETER A type hardness tester vertically downward and measuring hardness after a certain period of time (30 seconds).
5) Tensile strength and elongation: Tensile strength and elongation were measured according to ASTM D412, with a test sample of 2 ±0.5mm thick using a tensile tester at a rate of 50 mm/min. 6) Vicat softening temperature: Nicat softening temperature was measured according to JIS-K7206 for indicating the heat resistance. High Nicat softening temperature indicates good heat resistance.
7) Flexural strength: Flexural strength was measured according to ASTM D790, by applying loads to bend a test sample at a rate of 5 mm/min, and reporting a maximum load when no further load was applied.
8) Flexural modulus: Flexural modulus was determined from the gradient of the initial linear range present on a load-bending strength curve (at a rate of 5 mm/min) according to ASTM D790.
9) Izod impact strength: Izod impact strength was measured according to ASTM D256, using a test sample with a 3.2 mm thickness prepared by injection molding.
10) Sound absorbing property: It was represented as Tan δ(23 °C) according to changes in frequencies (rad/s), and it was also represented as a noise level(dB). High Tan δ value and low dB value indicates good sound absorbing property. A pipe used in this test had a thickness of 3.1 mm and a diameter of 42 Φmm.
Examples 1 ~5 and Comparative Example 1
According to the formulation of Table 1 listed below, polypropylene resin, sound absorbing material, and other additives were subjected to a twin-screw extruder wherein the screws rotated in the same direction, mixed in melt, and extruded in pelletized form. The pellet-formed resin was vacuum-dried at 80 °C .
With the resin material obtained as above, pipes were produced from a 42Φmm pipe forming machine, and their general physical properties including heat and impact resistance and sound absorbing property were measured according to the above-mentioned methods. The results are shown in Table 2 below.
Table 1.
[Note]
1) PP : impact copolymer having not less than 50 kg • cm/cm of Izod impact strength at room temperature (Trade name: BBllO ; Samsung General Chemicals Co., Ltd.)
2) Talc: KCM6300 (KOCH)
3) Barium Sulfate: BaSO (Solvay)
4) Calcium Stearate: Ca-St (Songwon Industrial Co., Ltd.)
5) Primary Antioxidant: 1-1010 and 1-168 (CIBA GEIGY, Japan)
6) Secondary Antioxidant: DSTDP (DongBo Co., Ltd.)
7) Wax: L-C102N (Lion Chem)
As it can be seen from results of the Table 2 above, the resin composition comprised of polypropylene resin and talc/barium sulfate as a sound absorbing material shows good processability while maintaining excellent heat and impact resistances, and a sound absorbing property, also being advantageous in terms of weight.
Industrial Applicability
The polypropylene resin composition according to the present invention shows an improving effect on heat and impact resistance, and a sound absorbing property, by comprising a mixture of talc/barium sulfate therein.
Claims
1. A polypropylene resin composition which comprises 50-70% by weight of polypropylene resin and 30-50% by weight of a mixture of talc and barium sulfate, wherein the mixing weight ratio of talc to barium sulfate is 1 :9 to 9 : 1.
2. The polypropylene resin composition according to claim 1, wherein said polypropylene resin is selected from the group consisting of syndiotactic polypropylene homopolymer, isotactic polypropylene homopolymer, propylene-ethylene random copolymer and propylene-ethylene block copolymer.
3. The polypropylene resin composition according to claim 2, wherein said isotactic polypropylene homopolymer is crystalline polypropylene homopolymer having 0.80-0.99 of an isotactic pentad ratio.
4. The polypropylene resin composition according to claim 2, wherein said propylene- ethylene random copolymer is random copolymer having 2-10 kg • cm/cm of Izod impact strength at room temperature.
5. The polypropylene resin composition according to claim 2, wherein said propylene- ethylene block copolymer is impact copolymer having not less than 11 kg • cm/cm of Izod impact strength at room temperature.
6. The polypropylene resin composition according to any one of claims 1 to 5, having 0.1- 60g/10 min of melt index determined by ASTM D1238 at 230 °C , under a load of 2.16 kg.
7. The polypropylene resin composition according to claim 1, further comprising 0.1-5.0 parts by weight of at least one selected from the group consisting of primary antioxidants, secondary antioxidants, lubricants and slip agents, per 100 parts by weight of the total amount of the polypropylene resin and the mixture of talc and barium sulfate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2003-0004173 | 2003-01-22 | ||
| KR1020030004173A KR100698914B1 (en) | 2003-01-22 | 2003-01-22 | Sound Absorbing Polypropylene Resin Composition with Excellent Impact Resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004065481A1 true WO2004065481A1 (en) | 2004-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2004/000067 WO2004065481A1 (en) | 2003-01-22 | 2004-01-16 | Sound absorbing polypropylene resin composition with excellent impact resistance |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100698914B1 (en) |
| WO (1) | WO2004065481A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111534036A (en) * | 2020-04-13 | 2020-08-14 | 日丰企业集团有限公司 | Modified polypropylene material and preparation method and application thereof |
| WO2020186994A1 (en) * | 2019-03-15 | 2020-09-24 | 金发科技股份有限公司 | Polypropylene composition and preparation method therefor |
| CN112708226A (en) * | 2020-12-26 | 2021-04-27 | 广东正通博雅装饰工程有限公司 | Sound-absorbing and noise-reducing interior decoration material and preparation method thereof |
| CN112724533A (en) * | 2020-12-17 | 2021-04-30 | 辰东意普万新材料(广东)有限公司 | High-sound-insulation polypropylene composite material for automobile engine compartment and preparation method thereof |
| CN113085280A (en) * | 2021-04-19 | 2021-07-09 | 陕西联塑科技实业有限公司 | Three-layer co-extrusion mute drain pipe and preparation method and application thereof |
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|---|---|---|---|---|
| JPS6284142A (en) * | 1985-10-08 | 1987-04-17 | Mitsui Toatsu Chem Inc | Polypropylene resin composition |
| JPS6395252A (en) * | 1986-10-13 | 1988-04-26 | Mitsui Toatsu Chem Inc | Polypropylene resin composition |
| US5468807A (en) * | 1991-08-08 | 1995-11-21 | Ube Rexene Corporation | Resin composition |
| KR19980076717A (en) * | 1997-04-12 | 1998-11-16 | 유현식 | High gloss polypropylene resin composition excellent in heat resistance |
| KR19990008880A (en) * | 1997-07-04 | 1999-02-05 | 유현식 | High Gloss Polyolefin Resin Composition |
-
2003
- 2003-01-22 KR KR1020030004173A patent/KR100698914B1/en active IP Right Grant
-
2004
- 2004-01-16 WO PCT/KR2004/000067 patent/WO2004065481A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6284142A (en) * | 1985-10-08 | 1987-04-17 | Mitsui Toatsu Chem Inc | Polypropylene resin composition |
| JPS6395252A (en) * | 1986-10-13 | 1988-04-26 | Mitsui Toatsu Chem Inc | Polypropylene resin composition |
| US5468807A (en) * | 1991-08-08 | 1995-11-21 | Ube Rexene Corporation | Resin composition |
| KR19980076717A (en) * | 1997-04-12 | 1998-11-16 | 유현식 | High gloss polypropylene resin composition excellent in heat resistance |
| KR19990008880A (en) * | 1997-07-04 | 1999-02-05 | 유현식 | High Gloss Polyolefin Resin Composition |
Cited By (5)
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20040067177A (en) | 2004-07-30 |
| KR100698914B1 (en) | 2007-03-23 |
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