WO1998054258A1 - Polyprolylene resin compositions and interior automotive trim parts - Google Patents
Polyprolylene resin compositions and interior automotive trim parts Download PDFInfo
- Publication number
- WO1998054258A1 WO1998054258A1 PCT/JP1998/002214 JP9802214W WO9854258A1 WO 1998054258 A1 WO1998054258 A1 WO 1998054258A1 JP 9802214 W JP9802214 W JP 9802214W WO 9854258 A1 WO9854258 A1 WO 9854258A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ethylene
- weight
- copolymer
- resin composition
- copolymer rubber
- Prior art date
Links
Classifications
-
- 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
-
- 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
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
-
- 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
-
- 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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- 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
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
-
- 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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
-
- 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
- C08L53/02—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 of vinyl-aromatic monomers and conjugated dienes
- C08L53/025—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 of vinyl-aromatic monomers and conjugated dienes modified
Definitions
- This invention relates to polypropylene resin compositions and more particularly, to the resin compositions havig a well-balanced combination of flowability, rigidity, high-temperature rigidity and impact resistance, which are suitable for the molding of interior automotive trim parts.
- the invention also relates to interior automotive trim parts molded from said resin compositions .
- Polypropylene resins have been extensively used in automotive applications and in fields such as electrical appliances, miscellaneous goods, films or the like, because the articles molded therefrom are excellent in rigidity and high-temperature rigidity.
- the resin compositions for interior automotive trim parts have been required to be excellent in not only rigidity and high-temperature rigidity, but also impact resistance of molded articles and flowability of the resin compositions on molding.
- conventional polypropylene resins have been limited in the use range, since the articles molded therefrom are deficient in impact resistance.
- polypropylene resins having improved impact resistance are known propylene/ethylene block copolymers wherein propylene and ethylene are block copolymerized and polypropylene resin compositions wherein polypropylene is incorporated with an ethylene/ ⁇ -olefin copolymer rubber.
- Such polypropylene resins have lower rigidity than a propylene homopolymer . If those resins are incorporated with inorganic fillers such as talc, as the occasion demands, to make up for lowered rigidity, they are used mainly as molding materials for exterior automotive trim parts including automotive bumpers and interior automotive trim parts including instrument panels, console boxes, resin pillars and trims.
- JP-B-59-37294 discloses a resin composition wherein a hydrogenated 1, 2-polybutadiene is incorporated in polymers or copolymers of ⁇ -olefin with 2 to 20 carbons, especially ethylene homopolyhmer, propylene homopolymer or ethylene/propylene copolymer.
- JP-B-62-45883 and JP-A-4-342752 disclose a resin composition wherein a hydrogenated diblock copolymer of polybutadienes consisting of 1,2-block and 1,4-block is incorporated in ⁇ - olefin polymers or copolymers, in particular polypropylene.
- JP-A-5-132606 discloses a resin composition wherein a hydrogenated product of polybutadiene/conjugated diene block copolymers is incorporated in a crystalline propylene/ethylene block copolymer.
- JP-A-1-168743 and JP-A- 1-168744 disclose a resin composition wherein a hydrogenated product of isoprene/butadiene copolymers is incorporated in polyolefins.
- the resin compositions are improved in both stress-whitening resistance and impact resistance, but remarkably lowered in rigidity and high-temperature rigidity. Thus a practical use of such resin compositions is limited to the field of soft materials.
- an object of the present invention is to provide a polypropylene resin composition having a well- balanced combination of the flowability of the resin composition and the rigidity, high-temperature rigidity and impact resistance of the molded article, which is suitable as a molding material for interior automotive trim parts.
- the above-mentioned object of the invention can be attained by incorporation of a specific hydrogenated diene block copolymer into a composition comprising a specific high tough polypropylene/ethylene-propylene copolymer composition, a specific ethylene/ ⁇ -olefin copolymer rubber and talc.
- the present invention provides a polypropylene resin composition comprising (a) 50-80% by weight of a polypropylene/ethylene-propylene copolymer composition,
- the polypropylene/ethylene- propylene copolymer composition (a) has a melt flow rate of 10-300 g/10 min and comprises 60-95% by weight of a polypropylene component and 5-40% by weight of an ethylene/propylene copolymer component, the polypropylene component has a melt flow rate of 100-1,000 g/10 min and a C f value of not more than 0.5 and the ethylene/propylene copolymer component has an ethylene content of 30-80% by weight;
- the ethylene/ ⁇ -olefin copolymer rubber (b) is a copolymer of ethylene and an ⁇ -olefin of 4 or more carbons, has an ethylene content of 25-90% by weight and contains a polyethylene crystal having a long period of 6-14 nm as determined by a small angle X-ray scattering; and the hydrogenated diene block copolymer
- the present invention also provides an interior automotive trim part which is molded from the above resin composition having a melt flow rate of not less than 25 g/10 min and has the mechanical properties such as a flexural modulus at room temperature of not less than 2,400 Mpa, a heat distortion temperature of not lower than 73 C and an Izod impact strength at room temperature of not less than 300 J/m.
- the molded articles from the above resin compositions satisfy various properties such as a flexural modulus at room temperature of not less than 2,400 Mpa, a heat distortion temperature of not lower than 73°C ( 1820 kPa load) and an Izod impact strength at room temperature of not less than 300 J/m, required for interior automotive trim parts.
- a flexural modulus at room temperature of not less than 2,400 Mpa a heat distortion temperature of not lower than 73°C ( 1820 kPa load) and an Izod impact strength at room temperature of not less than 300 J/m, required for interior automotive trim parts.
- the copolymer composition (a) is a principal component of the present resin composition and comprises 60 to 95% by weight of the polypropylene component and 40 to 5% by weight of the ethylene/propylene copolymer component.
- the polypropylene component is a high stereoregular propylene homopolymer which has a melt flow rate (MFRpp) of 100-1000 g/10 min, preferably 100-500 g/10 min as determined at 230°C under a load of 2.16 kg according to ASTM D 1238 and which has a narrow molecular weight distribution wherein a cross fractionation ratio ( C f value) on the basis of an elution temperature at 112°C in the fractionation of polypropylene with o-dichlorobenzene is not more than 0.5.
- MFRpp melt flow rate
- C f value cross fractionation ratio
- the cross fractionation ratio ( C f value) was determined in the following manner. More specifically, a fractionation column was prepared in which a stainless tube (15 cm length, 0.46 cm I/D) was packed with glass beads (each 0.1 mm diameter). 0.5 ml of a solution of polypropylene in o-dichlorobenzene at 140°C (concentration: 2 mg/ml ) was introduced into the fractionation column kept at 140°C . The temperature of the fractionation column was cooled down from 140°C to 0°C at the rate of l°C/min to precipitate polypropylene on the surface of glass beads.
- C fl integrated value of the polymer fractions eluted at an elution temperature of less than 112°C
- C fh integrated value of the polymer fractions eluted at an elution temperature of not less than 112°C
- the cross fractionation ratio (C f ) was expressed as a ratio of C fl to C fh (C fl /C fh ).
- the C f value was determined by a cross fractionation device (CFC T- 150A) manufactured by Mitsubishi Chemical Co. Ltd. using a column ( SHODEX AD-806 M/S) manufactured by Showa Denko Co. Ltd.
- the melt flow rate (MFR pp ) of the polypropylene component has an effect on the flowability of the resin composition and the toughness of the molded article. If it is too low, the melt flow characteristics of the resin composition lower, thus resulting in poor moldability. If it is too high, the toughness of the molded article lowers.
- the C f value is an index of a stereoregularity and molecular weight distribution. Lower C f value will provide higher stereoregularity and narrower molecular weight distribution, which results in an increased toughness of the molded article.
- the ethylene/propylene copolymer component is a random copolymer of ethylene and propylene and contains 30- 80% by weight, preferably 35-55% by weight of an ethylene unit on the copolymer basis.
- the ethylene content in the copolymer component has an effect on the rigidity and impact resistance of the molded article. If it is too high, the rigidity lowers. If it is too low, the impact resistance lowers .
- the ethylene content is determined by the infrared spectrometry of the ethylene/propylene copolymer using a culibration curve prepared from the standard samples of ethylene/propylene copolymers produced with varied reaction ratios.
- the polypropylene/ethylene-propylene copolymer composition (a) is adjusted to provide the melt flow rate (MFR in the range of 10 to 300 g/10 min, preferably 20 to 150 g/10 min. If MFR a is too low, the moldability, i.e. flowability of the resin composition on injection molding to the molded article, e.g. interior automotive trim parts becomes unsatisfactory. If it is too high, the impact resistance of the molded article lowers.
- the range of MFR a to provide a well-balanced combination of moldability and impact resistance is from 55 to 110 g/10 min.
- composition ratio of the polypropylene component and the ethylene/propylene copolymer component is varied depending on MFR pp of the polypropylene component and the ethylene content of the ethylene/propylene copolymer component, but 60 to 95% by weight of the polypropylene component and 40 to 5% by weight of the ethylene/propylene component .
- the amount of the copolymer composition (a) incorporated is 50 to 80% by weight, preferably 55 to 70% by weight on the basis of the resin composition.
- the copolymer composition (a) is a component for imparting the rigidity and high-temperature rigidity to the molded article. If the amount of the component incorporated is too little, the rigidity and high-temperature rigidity of the molded article lower. If it is too much, the impact resistance of the molded article lowers.
- the copolymer composition ( a ) may be prepared by any method if it satisfies the above-mentioned requirements.
- a slurry polymerization carried out in a hydrocarbon solvent such as n-hexane, n-heptane, n-octane, benzene, toluene, a bulk polymerization carried out in a liquefied propylene and a gas phase polymerization.
- a hydrocarbon solvent such as n-hexane, n-heptane, n-octane, benzene, toluene
- a bulk polymerization carried out in a liquefied propylene and a gas phase polymerization.
- the polymerization is performed at a temperature of 20 to 90°C, preferably 50 to 80°C and a pressure of 0 to 5 MPa.
- the gas phase polymerization the polymerization is performed at a temperature of 20 to 150°C and a pressure of 0.2 to 5 MPa.
- the polymerization is performed at a temperature of 20 to 80°C, preferably 40 to 70°C and a pressure of 0 to 5 MPa.
- hydrogen can be used to control the molecular weight.
- a hydrogen concentration is controlled to a higher level to prepare a polymer of high MFR pp .
- a hydrogen concentration is controlled to a very low level or a non-hydrogen state to prepare a copolymer of a low MFR EP .
- the ethylene/ ⁇ -olefin copolymer rubber (b) has an ethylene content of 25 to 90% by weight and is a copolymer rubber wherein ethylene and an ⁇ -olefin of 4 or more carbon atoms are copolymerized, which imparts the elasticity, especially elongation to the molded article.
- the copolymer rubber also exhibits a long period in the range of 6 to 14 nm, preferably 8 to 12 nm and its ethylene component is present as a polyethylene crystal , the long period being determined for the sheet by a small-angle X-ray scattering under the conditions: a radiation source Cu- ⁇ ray; a step angle 0.02 ; and a scanning range -4 to +4 , using a X-ray diffractometer ( JEOL 8200T) manufactured by Japan Electron Co. Ltd.
- the long period of the copolymer rubber ( b ) expresses the crystallizability of polyethylene in the copolymer rubber.
- the polyethylene crystal in the copolymer rubber acts as a quasi crosslinked substance to enhance the rubber.
- the long period is too low, namely the polyethylene crystal is too small or the crystallizability is insufficient, the action as a quasi crosslinked substance becomes insufficient. If the long period is too high, namely the polyethylene crystal is too large, the copolymer rubber is easy to separate from the polypropylene resin, which is responsible for reduction in tensile elongation of the article molded from the resin composition comprising such copolymer rubber.
- the ethylene/ ⁇ -olefin copolymer rubbers are not limited in respect of the molecular weight, but it is preferable to use those having a melt index (MI )( according to ASTM D 1238) of 0.1 to 30 g/10 min as determined at 190°C under a load of 2.16 kg.
- MI melt index
- the ethylene content in the ethylene/ ⁇ -olefin copolymer rubber is preferably 45 to 90% by weight, more preferably 50 to 80% by weight.
- Preferred ethylene/ ⁇ -olefin copolymer rubber is a copolymer rubber wherein ethylene and an -olefin of 4 or more carbons are copolymerized, for example a copolymer rubber constituted by two components such as ethylene/1-butene copolymer rubber, ethylene/1-hexene copolymer rubber, ethylene/1-octene copolymer rubber or the like, a copolymer rubber constituted by three components such as ethylene/1-butene/l-hexene copolymer rubber or the like and a mixture thereof.
- the amount of the ethylene/ ⁇ -olefin copolymer rubber incorporated is 5 to 40% by weight, preferably 10 to 30% by weight on the basis of the resin composition.
- the ethylene/ ⁇ -olefin copolymer rubber has an effect on the impact resistance of the molded article. If the amount is too little, the improved effect of the impact resistance is unsatisfactory. If it is too much, the rigidity and high-temperature rigidity lower, possibly with impairing the flowability of the resin composition.
- the ethylene/ -olefin copolymer rubber can be produced for example by a polymerization process as disclosed in JP-A-6-306121 wherein ethylene is continuously brought into contact with one or more substantially linear olefin polymers or a -olefins of 4-20 carbons under the polymerization condition in the presence of a catalyst composition comprising a 3-10 group metal in the periodic table or a lanthanide metal, a metal coordination complex and an activation co-catalyst, (c) Hydrogenated diene block copolymer
- the hydrogenated diene block copolymer is a diene block copolymer wherein not less than 85%, preferably 90% or more of the unsaturated bonds are hydrogenated.
- This diene block copolymer is a A-B or A-B-A block copolymer wherein the A segment is a 1 , 4-polybutadiene block and the B segment is a 1, 2-polybutadiene block, a polyisoprene block or a butadiene/isoprene copolymer block.
- 1, 4-polybutadiene block constituting the A segment has a maximum melting temperature peak as determined by a differential scanning calorimeter in the range of 80 to 120°C
- the hydrogenated diene block copolymer acts as a compatibilizing agent for enhancing the compatibility between the polypropylene/ethylene-propylene copolymer composition (a) and the ethylene/ ⁇ -olefin copolymer rubber (b), thereby to finely disperse the copolymer rubber particles in the copolymer composition ( a ) , thus improving the impact resistance of the molded article.
- 4-polybutadiene block is an index of the crystallizability. If the melting temperature is too low, namely the crystallizability is low, the compatibility with the ethylene/ ⁇ -olefin copolymer rubber becomes unsatisfactory.
- the hydrogenated 1, 2-polybutadiene and/or polyisoprene block constituting the B segment of the hydrogenated diene block copolymer has a compatibility with the copolymer composition ( a ) .
- the hydrogenated diene block copolymers can include, e.g.
- the amount of the hydrogenated diene block copolymer incorporated is 1 to 10% by weight, preferably 2 to 5% by weight on the basis of the resin composition. If the amount is too little, an effect of dispersing the ethylene/ ⁇ -olefin copolymer rubber ( b ) in the copolymer composition (a) as a compatibilizing agent becomes weak, so that a phase separation by heat on molding cannot be prevented. If it is too much, the resin composition is plasticized and softened, thereby lowering the rigidity and high-temperature rigidity of the molded article, (d) Talc
- the talc is finely divided talc particles having an average particle size of not more than 2 ⁇ m and in which the content of particles having a size of 4 ⁇ m or more is not more than 4% by weight, and is incorporated as a component for imparting the rigidity to the molded article. If the average particle size of the talc is too large and the content of particles having a size of 4 /in or more is too much, the impact resistance, particularly surface impact resistance of the final molded article lowers.
- the particle size of the talc is measured by Shimazu laser diffraction profile measuring device (SALD-2000) manufactured by Shimazu Manufacturing Co. Ltd., Japan.
- the amount of the talc incorporated is 10 to 30% by weight, preferably 15 to 25% by weight on the basis of the resin composition.
- the amount of the talc incorporated is as a required minimum level as possible, because talc gives adverse effects such as impairing the flowability of the resin composition, increasing the specific gravity of the product, eventually increasing the product weight and producing a flow mark on the surface of the molded article. If the amount is too little, the rigidity and high-temperature rigidity of the molded article lower, thus making it difficult to maintain the flexural modulus and heat distortion temperature required as the basic properties of interior automotive trim parts. If it is too much, the tensile elongation at break and impact resistance of the molded article tend to lower and a flow mark is easy to produce on the surface of the molded article.
- additives can be incorporated into the resin composition of the present invention, so long as the effects of the invention are not adversely influenced by such additives.
- Those additives can include antioxidants, antistatic agents, colorants (pigments), nucleating agents, slip agents, release agents, flame retardants, ultraviolet absorbers, weathering agents, plasticizers and free-radical generators.
- the resin composition of the present invention comprises the components ( a ) to ( d ) in the respective prescribed amounts and if desired, an additional component (e) in the prescribed amount.
- the resin composition of the invention can be produced, for example, by the following method.
- the resulting mixture is melt-kneaded with a roll mill, Banbury mixer, LaboPlastomill, single- or twin-screw extruder or the like at a melt temperature of 150 to 300°C, preferably 180 to 250°C and then pelletized.
- the resin composition of the invention can be subjected to the production of various moldings by any of various molding techniques including injection molding, injection press molding, extrusion, vacuum forming and pressure forming. Of these molding techniques, injection molding and injection press molding are preferably used for producing moldings from the composition.
- the interior automotive trim parts of the present invention are the articles molded into the desired shape from the resin composition wherein the melt flow rate is controlled to not less than 25 g/10 min. These molded articles satisfy the basic performance required for the interior automotive trim parts such as flexural modulus at room temperature (according to ASTM D 790) of 2400 MPa or more, heat distortion temperature (1820 kPa load, according to ASTM D 648) of 73°C or higher and Izod impact strength at room temperature (according to ASTM D 256) of 300 J/m or more.
- EXAMPLE The invention is further illustrated by the following examples and comparative examples. 1 ) Components of resin composition ( a ) component a-1) Polypropylene/ethylene-propylene copolymer composition Polypropylene component MFR pp 200 g/10 min
- the pellets of the ethylene/ ⁇ -olefin copolymer rubber were melt at 230°C under 10 MPa for 5 minutes and_ cooled to 50°C under 10 MPa to prepare a sheet having a thickness of 500 ⁇ m .
- the long period of the sheet was measured by a small-angle X-ray scattering using a X-ray diffractometer (JEOL 8200 T) manufactured by Japan Electron Co. Ltd. under the following conditions: radiation ray Cu- ⁇ ray; step angle 0.02° ; scanning range -4° to +4 (b) Melting temperature of A segment in the hydrogenated diene block copolymer
- the pellets of the component to be measured were determined under the conditions of 230°C and a load of 2.16 kg according to ASTM D 1238.
- MI Melt Index
- the pellets of the ethylene/ ⁇ -olefin copolymer rubber were determined under the conditions of 190 " C and a load of 2.16 kg according to ASTM D 1238. 8/54258
- each of the above-mentioned components was mixed in the respective proportions shown in Tables 1 and 2.
- the mixture was incorporated with a phenolic antioxidant as a stabilizer: 0.05 part by weight of tetrakis[methylene-3- ( 3, 5-di-tert . butyl-4-hydroxyphenyl )propionate]methane, a phosphorus antioxidant: 0.05 part by weight of tetrakis( 2, 4- di-tert .butyl phenyl )-4, 4-biphenylene-diphosphonite, a neutralizer: 0.1 part by weight of calcium stearate and a dispersant: 0.2 part by weight of zinc stearate.
- a phenolic antioxidant as a stabilizer: 0.05 part by weight of tetrakis[methylene-3- ( 3, 5-di-tert . butyl-4-hydroxyphenyl )propionate]methane
- a phosphorus antioxidant 0.05 part by weight of tetraki
- Test pieces having a length of 130 mm, a width of 13 mm and a thickness of 6.4 mm were used and measured for flexural modulus under the condition of 23 C according to ASTM D 790 to evaluate the rigidity.
- Test pieces having a length of 130 mm, a width of 13 mm and a thickness of 6.4 mm were used and measured for heat distortion temperature under the condition of 1820 kPa load according to ASTM D 648 to evaluate the high- temperature rigidity.
- Test pieces having a length of 246 mm, a width of 19 mm and a thickness of 3.2 mm were used and measured for tensile strength at yield point and tensile elongation at break under the condition of 23°C according to ASTM D 638.
- the resin compositions of the present invention have excellent flowability and the articles molded from such resin compositions have excellent rigidity and impact resistance. These properties include MFR of 25 g/10 min or more for the resin compositions and flexural modulus at room temperature of 2400 MPa or more, heat distortion temperature of 73 C or higher and Izot impact strength at room temperature of 300 J/m or more for the molded articles, satisfying the basic characteristics required for interior automotive trim parts.
- the resin compositions of Comparative Examples 1 to 3 not containing the hydrogenated diene block copolymer have a poor balance between the rigidity and impact resistance, especially poor impact resistance, and also have a reduced tensile elongation at break.
- the resin compositions of Comparative Examples 4 and 5 containing more than 10% by weight of the hydrogenated diene block copolymer exhibit an improved impact resistance, but remarkably low rigidity and high-temperature rigidity.
- the resin composition of Comparative Example 6 containing more than 30% by weight of talc demonstrates a — .-.y —
- the resin composition of Comparative Example 8 using the ethylene/ ⁇ -olefin copolymer rubber having the long period of 14 nm or more exhibits a remarkably low impact resistance and tensile elongation at break.
- the polypropylene resin compositions of the present invention exhibit excellent flowability, and also the articles molded therefrom are superior in high-temperature rigidity and impact resistance to those molded from conventional polypropylene resin compositions. Accordingly, the use of the present resin compositions as a molding material can make interior automotive trim parts large-sized, thin-walled, light-weight and low cost.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Graft Or Block Polymers (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98921733A EP0915933A1 (en) | 1997-05-26 | 1998-05-20 | Polyprolylene resin compositions and interior automotive trim parts |
AU74490/98A AU727936B2 (en) | 1997-05-26 | 1998-05-20 | Polyprolylene resin compositions and interior automotive trim parts |
US09/230,095 US6147152A (en) | 1997-05-26 | 1998-05-20 | Polypropylene resin compositions and interior automotive trim parts |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9/135261 | 1997-05-26 | ||
JP9135261A JPH10324725A (en) | 1997-05-26 | 1997-05-26 | Resin composition and automatic interior member |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998054258A1 true WO1998054258A1 (en) | 1998-12-03 |
Family
ID=15147577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1998/002214 WO1998054258A1 (en) | 1997-05-26 | 1998-05-20 | Polyprolylene resin compositions and interior automotive trim parts |
Country Status (8)
Country | Link |
---|---|
US (1) | US6147152A (en) |
EP (1) | EP0915933A1 (en) |
JP (1) | JPH10324725A (en) |
KR (1) | KR20000029586A (en) |
AU (1) | AU727936B2 (en) |
CA (1) | CA2261147A1 (en) |
TW (1) | TW358102B (en) |
WO (1) | WO1998054258A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0985705A1 (en) * | 1997-05-26 | 2000-03-15 | Chisso Corporation | Polyolefin resin composition |
US6107388A (en) * | 1997-08-28 | 2000-08-22 | Chisso Corporation | Polyolefin resin compositions |
WO2002038671A1 (en) * | 2000-11-10 | 2002-05-16 | Japan Polychem Corporation | Moldability modifier for polypropylene resin and polypropylene resin composition containing the same |
US6716921B1 (en) | 1999-09-07 | 2004-04-06 | Chisso Corporation | Propylene resin composition |
US6783844B2 (en) | 2000-07-12 | 2004-08-31 | Chisso Corporation | Polypropylene resin foam-molded article |
US6953815B2 (en) | 2001-04-04 | 2005-10-11 | Tamio Serita | Process for production of inorganic filler-containing polyolefin resin composition |
US9714337B2 (en) | 2013-12-16 | 2017-07-25 | Basell Poliolefine Italia S.R.L. | Mineral filled polypropylene composition |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000109639A (en) * | 1998-10-06 | 2000-04-18 | Japan Polychem Corp | Polypropylene based resin composition excellent in moldability and molded appearance |
JP2001181473A (en) | 1999-12-27 | 2001-07-03 | Japan Polychem Corp | Polypropylene-based resin composition excellent in moldability and physical property |
US6646205B2 (en) | 2000-12-12 | 2003-11-11 | Sumitomo Wiring Systems, Ltd. | Electrical wire having a resin composition covering |
KR100412452B1 (en) * | 2001-03-08 | 2003-12-31 | 현대자동차주식회사 | Polypropylene resin composition |
WO2004013197A1 (en) * | 2002-08-01 | 2004-02-12 | Societe De Technologie Michelin | Rubber composition for use as a bonding rubber in a tyre |
JP2008266431A (en) * | 2007-04-19 | 2008-11-06 | Sumitomo Chemical Co Ltd | Polypropylene based resin composition |
WO2009022647A1 (en) | 2007-08-10 | 2009-02-19 | Toyoda Gosei Co., Ltd. | Resin composition and resin product |
KR101451146B1 (en) * | 2013-01-23 | 2014-10-15 | 현대자동차주식회사 | Polyolefin resin compositions |
CN104558348B (en) * | 2013-10-15 | 2017-10-17 | 中国石油化工股份有限公司 | Terpolymer of the hexene of the butylene of a kind of ethene/1/1 and preparation method thereof and composite prepared therefrom |
WO2019005262A1 (en) | 2017-06-27 | 2019-01-03 | Exxonmobil Chemical Patents Inc. | High impact polypropylene impact copolymer |
WO2019005261A1 (en) | 2017-06-27 | 2019-01-03 | Exxonmobil Chemical Patents Inc. | High stiffness polypropylene impact copolymer |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0509662A1 (en) * | 1991-03-28 | 1992-10-21 | Ube Industries, Ltd. | Resin composition for automobile bumper |
JPH0748485A (en) * | 1993-08-03 | 1995-02-21 | Japan Synthetic Rubber Co Ltd | Thermoplastic resin composition |
EP0683206A1 (en) * | 1994-05-16 | 1995-11-22 | Kuraray Co., Ltd. | Thermoplastic polypropylene composition containing a butadiene-isoprene based block copolymer |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5937294A (en) * | 1982-08-27 | 1984-02-29 | Hitachi Ltd | Pump for liquid metal |
DE3529418C1 (en) * | 1985-08-16 | 1987-04-23 | Mayer Fa Karl | Blind web of a slatted blind and method of manufacturing it |
JPH0735410B2 (en) * | 1986-01-31 | 1995-04-19 | 三菱油化株式会社 | Catalyst for stereoregular polymerization of olefins |
JP2553117B2 (en) * | 1987-12-24 | 1996-11-13 | 株式会社クラレ | Ethylene-based thermoplastic resin composition |
JP2593900B2 (en) * | 1987-12-24 | 1997-03-26 | 株式会社クラレ | Resin composition |
JPH04342752A (en) * | 1991-05-17 | 1992-11-30 | Japan Synthetic Rubber Co Ltd | Thermoplastic elastomer composition |
JP2988080B2 (en) * | 1991-11-13 | 1999-12-06 | ジェイエスアール株式会社 | Thermoplastic polymer composition |
JP3213481B2 (en) * | 1994-07-07 | 2001-10-02 | トヨタ自動車株式会社 | Polypropylene resin composition for automotive interior |
AU699597B2 (en) * | 1995-07-17 | 1998-12-10 | Toyota Jidosha Kabushiki Kaisha | Polypropylene resin composition |
-
1997
- 1997-05-26 JP JP9135261A patent/JPH10324725A/en active Pending
-
1998
- 1998-05-20 AU AU74490/98A patent/AU727936B2/en not_active Ceased
- 1998-05-20 KR KR1019997000647A patent/KR20000029586A/en not_active Application Discontinuation
- 1998-05-20 CA CA002261147A patent/CA2261147A1/en not_active Abandoned
- 1998-05-20 US US09/230,095 patent/US6147152A/en not_active Expired - Fee Related
- 1998-05-20 EP EP98921733A patent/EP0915933A1/en not_active Withdrawn
- 1998-05-20 WO PCT/JP1998/002214 patent/WO1998054258A1/en not_active Application Discontinuation
- 1998-05-26 TW TW087108166A patent/TW358102B/en active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0509662A1 (en) * | 1991-03-28 | 1992-10-21 | Ube Industries, Ltd. | Resin composition for automobile bumper |
JPH0748485A (en) * | 1993-08-03 | 1995-02-21 | Japan Synthetic Rubber Co Ltd | Thermoplastic resin composition |
EP0683206A1 (en) * | 1994-05-16 | 1995-11-22 | Kuraray Co., Ltd. | Thermoplastic polypropylene composition containing a butadiene-isoprene based block copolymer |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 095, no. 005 30 June 1995 (1995-06-30) * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0985705A1 (en) * | 1997-05-26 | 2000-03-15 | Chisso Corporation | Polyolefin resin composition |
EP0985705A4 (en) * | 1997-05-26 | 2001-02-07 | Chisso Corp | Polyolefin resin composition |
US6107388A (en) * | 1997-08-28 | 2000-08-22 | Chisso Corporation | Polyolefin resin compositions |
US6716921B1 (en) | 1999-09-07 | 2004-04-06 | Chisso Corporation | Propylene resin composition |
US6783844B2 (en) | 2000-07-12 | 2004-08-31 | Chisso Corporation | Polypropylene resin foam-molded article |
WO2002038671A1 (en) * | 2000-11-10 | 2002-05-16 | Japan Polychem Corporation | Moldability modifier for polypropylene resin and polypropylene resin composition containing the same |
US7064160B2 (en) | 2000-11-10 | 2006-06-20 | Japan Polychem Corporation | Moldability modifier for polypropylene resin and polypropylene resin composition containing the same |
US6953815B2 (en) | 2001-04-04 | 2005-10-11 | Tamio Serita | Process for production of inorganic filler-containing polyolefin resin composition |
US9714337B2 (en) | 2013-12-16 | 2017-07-25 | Basell Poliolefine Italia S.R.L. | Mineral filled polypropylene composition |
EP3083820B1 (en) * | 2013-12-16 | 2020-11-25 | Basell Poliolefine Italia S.r.l. | Mineral filled polypropylene composition |
Also Published As
Publication number | Publication date |
---|---|
US6147152A (en) | 2000-11-14 |
KR20000029586A (en) | 2000-05-25 |
AU727936B2 (en) | 2001-01-04 |
CA2261147A1 (en) | 1998-12-03 |
AU7449098A (en) | 1998-12-30 |
EP0915933A1 (en) | 1999-05-19 |
TW358102B (en) | 1999-05-11 |
JPH10324725A (en) | 1998-12-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6147152A (en) | Polypropylene resin compositions and interior automotive trim parts | |
US6384122B1 (en) | Thermoplastic resin composition and injection molded article thereof | |
US7446147B2 (en) | Propylene resin composition | |
KR100215332B1 (en) | Thermoplastic resin composition | |
US5001182A (en) | Resin composition for automobile bumper | |
EP1391483B1 (en) | Resin composition for automotive parts | |
US4690976A (en) | Blends of olefinic and monovinylidene aromatic polymers | |
EP1130055B1 (en) | Thermoplastic resin composition and injection-molded object thereof | |
US5032459A (en) | Modified polyolefin resin | |
Karger‐Kocsis et al. | Dynamic mechanical properties and morphology of polypropylene block copolymers and polypropylene/elastomer blends | |
US6204328B1 (en) | Polyolefin resin composition | |
CA1326093C (en) | Modified polyolefin resin | |
JPH0753843A (en) | Thermoplastic polymer composition | |
EP0195829B1 (en) | Blends of olefinic and monovinylidene aromatic polymers | |
WO1999011708A1 (en) | Polyolefin resin compositions | |
CA2035004A1 (en) | Thermoplastic resin composition | |
JP4212716B2 (en) | Elastomer composition with excellent scratch resistance | |
US6087429A (en) | Propylene resin composition | |
KR20020050460A (en) | Polypropylene resin composition using for upholstery of car | |
JP4363604B2 (en) | Elastomer composition with excellent scratch resistance | |
JP3338255B2 (en) | Thermoplastic resin composition | |
KR20240070175A (en) | Polypropylene resin composition | |
JPH07145298A (en) | Inorganic filler-containing resin composition | |
JP4641590B2 (en) | Resin composition | |
JP4368467B2 (en) | Elastomer composition |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AU CA KR US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): DE FR GB IT NL |
|
ENP | Entry into the national phase |
Ref document number: 2261147 Country of ref document: CA Ref country code: CA Ref document number: 2261147 Kind code of ref document: A Format of ref document f/p: F |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1998921733 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1019997000647 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 74490/98 Country of ref document: AU |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 09230095 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 1998921733 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1019997000647 Country of ref document: KR |
|
WWG | Wipo information: grant in national office |
Ref document number: 74490/98 Country of ref document: AU |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1998921733 Country of ref document: EP |
|
WWR | Wipo information: refused in national office |
Ref document number: 1019997000647 Country of ref document: KR |