GB2213156A - Filler reinforced plastic composition - Google Patents
Filler reinforced plastic composition Download PDFInfo
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- GB2213156A GB2213156A GB8828520A GB8828520A GB2213156A GB 2213156 A GB2213156 A GB 2213156A GB 8828520 A GB8828520 A GB 8828520A GB 8828520 A GB8828520 A GB 8828520A GB 2213156 A GB2213156 A GB 2213156A
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- ethylene
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- propylene
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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
- C08L23/04—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/03—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by material, e.g. composite
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
- C08F297/06—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type
- C08F297/08—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
- C08F297/06—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type
- C08F297/08—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins
- C08F297/083—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins the monomers being ethylene or propylene
-
- 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
-
- 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
- C08L23/14—Copolymers of propene
- C08L23/142—Copolymers of propene at least partially crystalline copolymers of propene with other 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
-
- 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
Abstract
A filler reinforced plastic composition, suitable for automotive trim parts such as bumper, facia and fender, comprises (a) 59 to 74% propylene-ethylene copolymer having a content soluble in boiled xylene of 5 to 12% which content soluble in boiled xylene contains ethylene in an amount ranging from 20 to 60%, and the copolymer containing 1 to 7 weight % ethylene and having an MFR of 15 to 50 g/10 min, (b) 20 to 35% ethylene-propylene copolymer rubber containing 20 to 60% propylene and having a Mooney viscosity ML1+4 (100 DEG C) of 100 to 150, and (c) 3 to 6% talc having a specific surface area not smaller than 30,000 cm<2>/g and an average particle size of 0.5 to 2.0 mu m.
Description
FILLER REINFORCED PLASTIC COMPOSITION
This invention relates to a filler reinforced plastic composition, suitable for automotive trim parts, and more particularly to such a plastic composition which is excellent in molded appearance and physical property balance (particularly balance in flexural elastic modulus and low temperature impact resistance).
Hitherto metal has been mainly used as the material for automotive trim parts such as bumper, facia6 and front fender. However, plastic material such as polypropylene-based plastics have been recently extensively used as the material for the automotive trim parts. For example, bumpers have been produced from propylene-based resins which are improved in painting ability, appearance, low temperature impact resistance. In order to improve such characteristics, a variety of propositions have been made, in which ethylene-propylene-based copolymer rubber is blended to improve mainly painting ability and impact resistance while inorganic filler such as talc is added to improve rigidity. These propositions are disclosed, for example, in Japanese Patent Pro isional Publication
Nos. 57-55942, 57-159841, 57-159842, 58-111846, 58-168648, 58-213043, and 60-188453.
However, such propylene-based resins are insufficient in dimensional stability, moldability, and various physical properties, particularly in case of molding into large-sized automotive trim parts.
What is desired is a filler reinforced plastic composition which is high in dimensional stability, moldability, and various physical properties.
Also desired is a filler reinforced plastic composition which is suitable for the material of automotive trim parts such as bumper, facia, and front fender.
A filler reinforced plastic composition according to the present invention is comprised of the following components (a), (b), and (c):
Component (a) is propylene-based polymer containing ethylene, in an amount ranging from 59 to 74 weight %. The polymer has a content soluble in boiled xylene, ranging from 5 to 12 weight % relative to the polymer. The content soluble in boiled xylene contains ethylene in an amount ranging from 20 to 60 weight %. The polymer contains ethylene in an amount ranging from 1 to 7 weight % relative to the polymer and has atMFR ranging from 15 to 50 g/10 min.
Component (b) is copolymer rubber containing ethylene-propylene, in an amount ranging from 20 to 35 weight %. The copolymer rubber contains propylene in an amount ranging from 20 to 60 weight % relative to the copolymer rubber and has a Mooney viscosity ML1+4 (1000C) ranging from 100 to 150. Component
(c) is talc in an amount ranging from 3 to 6 weight 8. The talc has a specific surface area not smaller than 30,000 cm2/g and an average particle size ranging from 0.5 to 2.0 w.
gn article can be produced from the above filler reinforced plastic composition which is excellent in dimensional stability and painting ability as compared with conventional propylene-based polymer, while having high physical property balance
(particularly rigidity-low temperature impact resistance balance), good appearance, high moldability so that sink and warp are not prominent.
Additionally, the article formed of the composition can be made s excellent in printing ability, bonding ability, scratch resistance, weld strength,and tensile elongation while providing advantages in which weld line is not prominent. Thus, the above plastic composition is suitable for the material of large-sized automotive trim parts, particularly bumper, bumper skirt, facia,and fender.
DETAILED DESCRIPTION OF THE INVENTION
According to the present invention, a filler reinforced plastic composition is comprised of the following components:
(a) Propylene-based polymer containing ethylene, in an amount ranging from 59 to 74 weight %. The polymer has a content soluble in boiled xylene, ranging from 5 to 12 weight %. The content soluble in the boiled xylene contains ethylene in an amount ranging from 20 to 60 weight %. The polymer contains ethylene in an amount ranging from 1 to 7 weight % and has aaMFR ranging from 15 to 50 g/10 min.; (b) Copolymer rubber containing ethylenepropylene, in an amount ranging from 20 to 35 weight %.The copolymer rubber contains propylene in an amount ranging from 20 to 60 weight % relative to the copolymer rubber and has a Mooney vicosity
ML1+4(1000C) ranging from 100 to 150; and
(c) Talc in an amount ranging from 3 to 6 weight %. The talc has a specific surface area not smaller than 30,000 cm2/g and an average particle size ranging from 0.5 to 2.0 s.
Concerning the above-mentioned component (a), a typical one is crystalline propylene-ethylene block copolymer containing a content soluble in boiled xylene, ranging from 5 to 12 weight %, preferably 5 to 10 weight %. The content soluble in the boiled xylene contains ethylene in an amount ranging from 20 to 60 weight %r preferably 25 to 50 weight %. The propylene-ethylene block copolymer contains ethylene in an amount of 1 to 5 weight % and has ar.MFR (melt flow rate) ranging from 15 to 50 g/10 min preferably 20 to 30 g/10 min.
The content of ethylene is measured by a known infrared-absorbing analysis or a known NMR (nuclear magnetic resonance) method. The content soluble in boiled xylene is measured as follows: 2 g of the'sample of propylene-ethylene block copolymer is dipped for 20 min in 600 g of boiled xylene to be solved. Thereafter the boiled xylene is cooled to room temperature and filtered by a G4 glass filter, thereby to obtain an insoluble content. The insoluble content is thereafter dried and weighed to obtain the weight of the insoluble content. The difference in weight between the sample and the insoluble content corresponds to the weight of the content soluble in the boiled xylene.
It is be noted that if the ethylene content and the boiled xylene soluble content are not within the ranges of the above-mentioned ranges, a filler reinforced plastic composition is inferior in dimensional stability, painting ability, appearance, and physical property balance and therefore not suitable for practical use.
The MFR (Melt Flow Rate) is a flow rate
(g/10 min ) of a resin or the propylene-ethylene block copolymer (kept at 230 C) flowing through a hole (diameter: 2.0955 mm, axial length: 8 mm) formed in a die under a load of 2.16 kg. This MFR is according to JIS(Japanese Industrial
Standard)-K 7210.
In production of the propylene-ethylene block copolymer, a catalyst for stereospecific polymer is usually used. A typical one of such a catalyst is a composite catalyst of an organoaluminum halogenide and a titanium catalyst component on a carrier or a titanium halogenide compound. An electron donor compound such as benzoic acid or the like is added to the catalyst as occasion demands. Furthermore the catalyst may be activated by known methods.
Polymerization of the propylene-ethylene block copolymer is carried out by known methods, for example, as disclosed in Japanese Patent Publication
Nos. 39-1836, 44-16668, 49-30264, and Japanese Patent
Provisional Publication No. 50-11529.
The thus previously polymerized propylene-ethylene block copolymer may be adjusted in
MFR by using organic peroxide such as diacyl peroxide, dialkyl peroxide, and the like.
The blended amount of the propylene-ethylene block copolymer is within a range from 59 to 74 weight % relative to the total amount of the filler reinforced plastic composition. It is to be noted that the propylene-ethylene block copolymer may be replaced with a mixture of two or more kinds of resins if the characteristics are within the abovementioned ranges. In this connection, propylene resin whose characteristics are not within the abovementioned ranges may be used together with the propylene-ethylene block copolymer within a range not exceeding the above-mentioned range of the propyleneethylene block copolymer.
Furthermore, the propylene-ethylene block copolymer may be replaced with three- or more-monomer system copolymer (graft type, random type, or block type) in which the propylene-ethylene copolymer includes other monomers, for example, alpha-olefine such as butene-l, hexene-l, octene-l, 4-methylpentene-l, and the like; vinyl ester such as vinyl acetate; unsaturated organic acid such as (meta) acrylic acid (ester), maleic anhydride, and the like; and derivatives of unsaturated organic acids.
The copolymer used in place of the propyleneethylene block copolymer may be a mixture of various copolymers of the above-mentioned.
Concerning the component (b), a typical one is ethylene-propylene block copolymer rubber (EPM) which may be replaced with a three-monomer system copolymer rubber such as ethylene-propylene-nonconjugated diene terpolymer rubber. The content of propylene of the copolymer rubber is within a range from 20 to 60 weight %, preferably 25 to 50 weight %, relative to the copolymer rubber. The copolymer rubber has a
Mooney viscosity ML1+4(100OC) ranging from 100 to 150, preferably 120 to 140. If the ethylene propylene-nonconjugated diene terpolymer rubber is used, it is preferable that the terpolymer rubber has an iodine value not higher than 20.The blended amount of the copolymer rubber is within the range from 20 to 35 weight % relative to the total amount of the filler reinforced plastic composition.
Particularly in case in which the propyleneethylene block copolymer is used as the component (a), painting ability is inferior while there is a tendency to cause molding delamination if the Mooney viscosity of the copolymer rubber as the component (b) is lower than 100; whereas appearance (particularly in connection with flowmark and the like), painting ability, and gloss-change preventing characteristics for painted film are inferior if the
Mooney viscosity exceeds 150. In this connection, the Mooney viscosity of the copolymer rubber is preferably within a range from 120 to 140.The copolymer rubber as the component (b) may be a mixture of two or more copolymer rubbers, for example, a mixture of ethylene-propylene copolymer rubber and ethylene-propylene-nonconjugated diene terpolymer rubber, and a mixture of a high viscosity resin and a low viscosity resin if the range of
Mooney viscosity is within the range from 100 to 150, preferably 120 to 140. In this case, a resin whose
Moony viscosity is not within the above range may be used.
Concerning the component (c), the talc has a specific surface area not smaller than 30,000 m2/g and an average particle size ranging from 0.5 to 2.0 sum. It is preferable that the talc has such a particle size distribution that a fraction of particle sizes not larger than 5 pmis not lower than 95 %, and a fraction of particle sizes not larger than 1 ptis within a range from 10 to 98%. It is confirmed a filler reinforced plastic compositin is inferior in dimensional stability, balance in rigidity-low temperature impact resistance, painting ability, and appearance if the talc is not within the above-mentioned ranges in specific surface area and average particle size.
Measurement of the specific surface area is carried out by a usual constant pressure air passing type specific surface area measuring device (according to air penetrating method) such as a powder specific surface area measuring device (SS-100 type) made by Shimazu Seisakusho Co., Ltd. in Japan.
Measurement of the particle size distribution is carried by a light transmittance measurement in a liquid phase sedimentation method thereby to obtain cumulative distribution values. Examples of measuring device for the particle size distribution are a one SA-CP type (for example, SA-CP 2-20 type) made by Shimazu Seisakusho Co., Ltd., and a one SKN type (for example, SRN-1000 type) made by Seishin
Kigyo Co., Ltd. The average particle size is a particle size value at a point of 50% in an accumulated particle size distribution curve obtained by the above-mentioned particle size distribution measurement by the above-mentioned particle size distribution measuring device.
The determination of the above-mentioned various physical properties is made on the talc or filler obtained by extracting the talc from the filler reinforced plastic composition using organic solvent, or by burning the plastic composition. The former extracting is carried out by dipping the plastic composition in, for example, xylene at 130 to 140 C for about 10 hours to be solved, and thereafter by separating the talc from the resin under filtration using a cylindrical filter paper. It is preferable that the talc has an average value of aspect ratio of not less than 3, more preferably not less than 4.
The aspect ratio is a ratio between one of longitudinal or lateral length and the thickness of a talc particle.
The talc used in the filler reinforced plastic composition is produced as follows: Talc raw ore is pulverized, for example, by a pulverizing device such as a tube mill type pulverizer, an impact type pulverizer, a micron mill type pulverizer, a centrifugal roller type Raymond mill. If further fine pulverization is required, the thus pulverized talc raw ore is further pulverized in a dried state or in a wet state by a pulverizer such as a micron mill, a jet type pulverizer, a jetomizer, a micronizer, a jet pulverizer, an agitating pulverizer mill (a tower mill), a vibration mill, or a colloid mill.
The thus pulverized talc is subjected to dry or wet classification one or plural times by using a classifying device such as a cyclone, a multiclone, a micron separator, a jetclone, a classiclone, a rake classifier, a hydrocyclone, a hydraulically operated classifier, or a centrifugal classifier. By thus classifying talc particles, the talc having the required physical properties is prepared.
The blending rate (weight %) of the components
(a), (b), and (c) of the filler reinforced plastic composition is as follows: Relative to the total amount of the components (a), (b), and (c), the component (a) is within the range from 59 to 74 weight %; the component (b) is within the range from 20 to 35 weight %; and the component (c) is within the range from 3 to 6 weight %.
The above ranges are determined by the following reasons: If the component (a) is less than 58 weight %, the resultant filler reinforced plastic composition is not satisfactory in moldability and mechanical strength. If the component (a) exceeds 74 weight %, the resultant plastic composition is inferior in dimensional stability and rigidity.
Thus, the resultant plastic composition having the component (a) outside the above-mentioned range is not suitable for automotive outer trim parts.
If the component (b) is less than 20 weight %, the resultant filler reinforced plastic composition is inferior in painting ability and low temperature impact resistance. If the component (b) exceeds 35 weight %, the resultant plastic composition is inferior in rigidity, dimensional stability, and scratch resistance. Thus, the resultant resin composition having the component (b) outside the above-mentioned range is not suitable for automotive outer trim parts.
If the content of the component (c) is less than 3 weight %, the resultant filler reinforced plastic composition is too inferior in dimensional stability and insufficient in rigidity. If the content of the component (c) exceeds 6 weight %, the resultant plastic composition is inferior in apearance and strength particularly at a weld section. Thus, the resultant plastic composition having the component (c) outside the above-mentioned range is not suitable for automotive outer trim parts.
It will be understood that other additives may be added to the filler reinforced plastic composition comprising the components (a), (b), and (c) within a range which does not affect the advantageous effect of the present invention. Examples of the additives are organic and inorganic fillers which are other than the talc (as the component (c)) and have been subjected or not subjected to any treatment; rubber and latex components other than the ethylenepropylene copolymer rubber (as the component (b)); thermosetting and thermoplastic resins other than the propylene-ethylene copolymer (as the component (a)); and usual ones such as a variety of stabilizers, pigment, dispersant, crosslinking agent, foaming agent, flame retarder, nucleating agent, antistatic additive, and painting ability improving agent.It will be appreciated that addition of the additives improve the resultant filler reinforced resin composition in electroplating ability, painting ability, bonding ability, luster, moldability, tapping ability, kneading ability, weld strength, creep resistance, dimensional stability, heat resistance, and the like. Addition of calcium carbonate, barium sulphate, titanium oxide and/or zinc oxide exhibits remarkable improvement in advantageous effect of the additives.
The filler reinforced plastic composition can be prepared by blending the three components (a), (b), and (c), with or without the additives, using usual kneading devices such as a single shaft extruder, a two shaft extruder, a banbury mixer, a roll, a bravendor plastograph, or a kneader. Usually, preparation of the filler reinforced plastic composition is carried out by kneading the mixture of the three components (a), (b), and (c), with or without the additives using a usual extruder or the like thereby to be formed into compound of the pellet type. Thereafter, the pellet type compound will be molded into a desired shape.Otherwise, preparation of the filler reinforced plastic composition may be carried out by directly supplying the three components (a), (b), and (c), with or without the additives into one of a variety of usual molding machines, in which kneading is simultaneously made in the molding machine. Moreover, preparation of the filler reinforced plastic composition may be carried out by previously kneading the talc (the component
(c)) and ethylene-propylene copolymer rubber, with or without the additives, at relatively high concentrations thereby to prepare a master batch.
The master batch is diluted and blended with the polymer containing ethylene and/or propylene-based polymer to obtain blended compound. The blended compound is thereafter molded into a desired shape.
Molding method for the filler reinforced plastic composition is not limited to a particular one, in which extrusion molding, blow molding, injection molding, sheet molding, thermoforming, rotational molding, laminated molding, and the like are employed.
Of these molding methods, injection molding is the most suitable to exhibit the above-discussed advantageous effects.
As is appreciated from the above discussion, an article formed of the filler reinforced plastic composition according to the present invention is excellent in dimensional stability and painting ability as compared with an article formed of another filler reinforced plastic material, while having high physical property balance (particularly rigidity-low temperature impact resistance balance), good appearance, high moldability so that sink and warp are not prominent. Additionally, the aricle formed of the filler reinforced plastic composition according to the present invention is good in printing ability, bonding ability, scratch resistance, weld strength,and tensile elongation while providing advantages in which weld line is not prominent.Thus, the filler reinforced plastic composition of the present invention is suitable for automotive outer trim parts, particularly bumper, bumper skirt, facia, fender, and the like. This makesíe possible to provide automotive large-sized trim parts in high quality.
EXAMPLES
The invention will be understood more readily with reference to the following examples and comparative examples; however, these examples are intended to illustrate the invention and are not to be construed to limit the scope of the invention.
Tests for measuring the physical properties of resultant samples (filler reinforced plastic compositions) were conducted as follows:
1. Dimensional Stability: Represented by "coefficient of linear expansion" which was measured according to ASTM-D696, in which a range of temperature was from -3OOC to 200C.
2. MFR (Melt Flow Rate): Measured according to
JIS-K 7210 (temperature: 230 C, load : 2.16 kg).
3. Flexural Elastic Modulus: Measured according to JIS-R 7203 (temperature: 230C)
4. High Speed Surface Impact Resistance: A dart (tip diameter: 5/8 inch) was dropped at a speed of 11 m/sec onto a specimen (100 mm x 100 mm x 3 mm) mounted on a support (hole diameter: 50 mm). Then, the deformation and breakdown behavior of the specimen under the impact load of the dart was measured, in which plastic deformation energy from a point of the largest stress generation to a point of breakage was calculated in an obtained impact pattern, thus obtaining the strength (kg.cm) of a sample. In this test, atmospheric temperature was -30 C.
Examples 1 to 4 and Comparative Examples 1 to 10
The components (a), (b), and (c) shown in Tables 1, 2,and 3 were blended as shown in Table 4 to obtain a variety of blended samples. 100 parts by weight of each blended sample was further mixed with 0.08 part by weight of 2,6-di-t-butyl-p-phenol, 0.1 part by weight of tetrakis [methylene-3-(3',5'-di-t-tutyl-4'- hydroxyphenyl) propionate methane, and 0.5 part by weight of carbon black to obtain a mixture.The mixture was mixed for 2 minutes by a super mixer made by Rawada Seisakusho Co., Ltd. in Japan, and thereafter kneaded and pelletized at 230 0C by a FCM two-shaft kneader, thereby obtaining samples (filler reinforced plastic compositions) of Examples 1 to 4 and Comparative Examples 1 to 10 as shown in Table 4.
Each sample was molded at 230 C by a screw inline injection molding machine to form a specimen.
The thus formed specimen was subjected to abovementioned tests for dimensional stability, MFR, flexural elastic modulus, and impact resistance to evaluate performance of the samples. The test results are shown also in Table 4.
The test results demonstrate that the samples of the Examples 1 to 4 exhibit excellent balance in quality. In other words, the samples according to the present invention have smaller linear expansion coefficient while exhibiting practically sufficient physical property balance and excellent moldability.
In contrast, the samples of Comparative Examples, which are not within the scope of the present invention, exhibit undesirable quality balance.
TABLE 1
- Component (a)
Ethylene Content
content in soluble in Ethylene MFR
Kind boiled xylene xylene content g/10 min
(wt%) (wt%) (wt%) 1-A 30 6 5 26 1-B 34 7 3 40
1-C 49 9 6 20 * lD 30 6 2 10
1-E 50 13 10 15 1-F 70 10 5 30
* Adjusted with organic peroxide
TABLE 2
- Component Cb) Mooney Propylene
Kind viscosity content
(wt%)
2-A 120 35
2-B 150 27
2-C 70 28
TABLE 3
- Component (c)
Specific Average
Kind surface area particle size
(m/g) (wt%)
3-A 39300 1.6
3-B 35000 2.1
3-C 28000 3.5 TABLE 4
Blending rate (wt%) Flexural Impact
Dimensional Moldability elastic resist
Sample Component (a) Component (b) Component (c) stability MFR modulus ance
No.
Kind Amount Kind Amount Kind Amount (x10-5/ C) g/10 min (kg/cm) (kg.cm)
1 1-A 72 2-B 24 3-A 4 8.0 6 13000 12.0
2 1-B 70 2-B 26 3-A 4 8.1 6 13500 12.0
Example
3 1-C 65 2-B 30 3-A 5 6.8 6 12500 12.0
4 1-A 60 2-B 35 3-A 5 7.2 6 12000 13.0
1 1-A 76 2-A 20 3-A 4 9.2 7 11000 14.0
2 1-B 55 2-B 40 3-A 5 7.1 4 10000 16.0
3 1-A 80 2-A 15 3-A 5 9.6 8 11000 16.0
4 1-A 67 2-B 25 3-A 8 7.5 5 14000 5.0
Comparative 5 1-C 70 2-C 26 3-A 4 8.1 8 12500 4.0 example
6 1-C 70 2-A 26 3-B 4 8.4 6 13000 7.0
7 1-C 70 2-B 26 3-C 4 8.1 6 13000 4.0
8 1-D 72 2-B 24 3-A 4 8.8 7 13500 4.0
9 1-E 72 2-B 24 3-A 4 8.2 7 13000 4.0
10 1-F 72 2-B 24 3-A 4 8.6 7 12500 4.0
Claims (8)
- Claims:1. A filler reinforced plastic composition comprising: (a) propylene-based polymer containing ethylene, in an amount ranging from 59 to 74 weight %, said polymer having a content soluble in boiled xylene, ranging from 5 to 12 weight % relative to said polymer, said content soluble in boiled xylene containing ethylene in an amount ranging from 20 to 60 weight %, said polymer containing ethylene in an amount ranging from 1 to 7 weight % relative to said polymer and having anMFR ranging from 15 to 50 g/10 min (b) copolymer rubber containing ethylenepropylene, in an amount ranging from 20 to 35 weight %, said copolymer rubber containing propylene in an amount ranging from 20 to 60 weight % relative to said copolymer rubber and having a Mooney viscosity ML1+4 (100 C) ranging from 100 to 150 ; and (c) talc in an amount ranging from 3 to 6 eight %, said talc having a specific surface area not smaller than 30,000 cm2/g and an average particle size ranging from 0.5 to 2.0 pn.
- 2. A composition as claimed in claim 1, wherein said propylene-based polymer is one selected from the group consisting of a first copolymer containing propylene-ethylene, a mixture of said first copolymer and a second polymer, and a third copolymer containing propylene-ethylene and at least one kind of unsaturated organic compounds, and a mixture of at least two of said first, second, and third copolymers.
- 3. A composition as claimed in claim 1 or claim 2 , wherein said copolymer rubber is one selected from the group consisting of ethylenepropylene copolymer rubber, ethylene-propylenenonconjugated diene, and a mixture of said ethylenepropylene copolymer rubber and said ethylenepropylene-nonconjugated diene.
- 4. A composition as claimed in anv preceding claim , wherein said talc has a first particle size fraction not larger than 5 ,within a range not less than 95% and a second particle size fraction not larger than 1 within a range from 10 to 98%.
- 5. A composition as claimed in an preceding claim further comprising additives.
- 6. A filler reinforced plastic composition comprising: (a) propylene-ethylene block copolymer in an amount ranging from 59 to 74 weight %, said block copolymer having a content soluble in boiled xylene, ranging from 6 to 12 weight % relative to said block copolymer, said content soluble in boiled xylene containing ethylene in an amount ranging from 20 to 60 weight %, said block copolymer containing ethylene in an amount ranging from 1 to 7 weight % and having atMFR ranging from 15 to 50 g/10 min (b) ethylene-propylene copolymer rubber in an amount ranging from 20 to 35 weight %, said copolymer rubber containing propylene in an amount ranging from 20 to 60 weight % and having a Mooney vicosity ML1+4(1000C) ranging from 100 to 150; and (c) talc in an amount ranging from 3 to 6 weight % said talc having a specific surface area not smaller than 30.000 cm/g and an average particle size ranging from 0.5 to 2.Ojjm.
- 7. A filler reinforced plastic composition substantially as described in any of Examples 1 to 4.
- 8. An automotive trim part produced from a filler reinforced plastic composition according to any preceding claim.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62307719A JPH01149845A (en) | 1987-12-07 | 1987-12-07 | Filler reinforced resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8828520D0 GB8828520D0 (en) | 1989-01-11 |
| GB2213156A true GB2213156A (en) | 1989-08-09 |
Family
ID=17972423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8828520A Withdrawn GB2213156A (en) | 1987-12-07 | 1988-12-07 | Filler reinforced plastic composition |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH01149845A (en) |
| GB (1) | GB2213156A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2246358A (en) * | 1990-06-27 | 1992-01-29 | Nissan Motor | Plastic automotive bumper |
| EP0476926A2 (en) * | 1990-09-12 | 1992-03-25 | Idemitsu Petrochemical Co., Ltd. | Polypropylene-based resin composition |
| EP0636650A1 (en) * | 1993-07-28 | 1995-02-01 | Mitsui Petrochemical Industries, Ltd. | Propylene polymer compositions |
| EP0958969A1 (en) * | 1998-05-16 | 1999-11-24 | Concept Mouldings Limited | Vehicle protection bars |
| EP1077837A1 (en) * | 1998-05-22 | 2001-02-28 | Magna International of America, Inc. | Fascia for a motor vehicle having reduced wall thickness |
| US7067591B2 (en) | 2001-01-10 | 2006-06-27 | Basell Poliolefine Italia S.P.A. | Block copolymers and process for their preparation |
| EP2130861A3 (en) * | 2001-09-18 | 2010-07-21 | JSR Corporation | Thermoplastic elastomer composition and method for producing the same |
| EP2410008A1 (en) * | 2010-07-22 | 2012-01-25 | Borealis AG | Bimodal talc filled heterophasic polypropylene |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2143429C (en) * | 1993-06-30 | 1999-01-26 | Takao Nomura | Polypropylene composition |
| JP3260268B2 (en) * | 1995-12-18 | 2002-02-25 | 宇部興産株式会社 | Polypropylene resin composition |
| US5880198A (en) * | 1996-03-04 | 1999-03-09 | Tonen Chemical Corporation | Thermoplastic resin composition comprising propylene elastomer, and talc components |
| KR100537923B1 (en) * | 1998-12-31 | 2006-02-28 | 삼성토탈 주식회사 | Polypropylene resin composition with excellent melt flowability and excellent heat resistance and low temperature impact strength |
| JP2001172453A (en) | 1999-12-14 | 2001-06-26 | Basell Technology Co Bv | Propylene resin composition |
| CN104312493A (en) * | 2014-10-28 | 2015-01-28 | 无锡宝通带业股份有限公司 | Fire-retardant heat-resistant pasting gum for conveyer belt and preparation method of pasting gum |
-
1987
- 1987-12-07 JP JP62307719A patent/JPH01149845A/en active Pending
-
1988
- 1988-12-07 GB GB8828520A patent/GB2213156A/en not_active Withdrawn
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2246358A (en) * | 1990-06-27 | 1992-01-29 | Nissan Motor | Plastic automotive bumper |
| GB2246358B (en) * | 1990-06-27 | 1993-08-11 | Nissan Motor | Plastic automotive bumper |
| US5266619A (en) * | 1990-06-27 | 1993-11-30 | Nissan Motor Co., Ltd. | Plastic automotive bumper |
| EP0476926A2 (en) * | 1990-09-12 | 1992-03-25 | Idemitsu Petrochemical Co., Ltd. | Polypropylene-based resin composition |
| EP0476926A3 (en) * | 1990-09-12 | 1992-05-06 | Idemitsu Petrochemical Company Limited | Polypropylene-based resin composition |
| US5412020A (en) * | 1993-07-28 | 1995-05-02 | Mitsui Petrochemical Industries, Ltd. | Propylene polymer compositions |
| EP0636650A1 (en) * | 1993-07-28 | 1995-02-01 | Mitsui Petrochemical Industries, Ltd. | Propylene polymer compositions |
| CN1062575C (en) * | 1993-07-28 | 2001-02-28 | 三井化学株式会社 | Propylene polymer compositions |
| EP0958969A1 (en) * | 1998-05-16 | 1999-11-24 | Concept Mouldings Limited | Vehicle protection bars |
| EP1077837A1 (en) * | 1998-05-22 | 2001-02-28 | Magna International of America, Inc. | Fascia for a motor vehicle having reduced wall thickness |
| EP1077837A4 (en) * | 1998-05-22 | 2004-07-07 | Magna Int America Inc | Fascia for a motor vehicle having reduced wall thickness |
| US7067591B2 (en) | 2001-01-10 | 2006-06-27 | Basell Poliolefine Italia S.P.A. | Block copolymers and process for their preparation |
| EP2130861A3 (en) * | 2001-09-18 | 2010-07-21 | JSR Corporation | Thermoplastic elastomer composition and method for producing the same |
| EP2410008A1 (en) * | 2010-07-22 | 2012-01-25 | Borealis AG | Bimodal talc filled heterophasic polypropylene |
| WO2012010481A1 (en) * | 2010-07-22 | 2012-01-26 | Borealis Ag | Hybrid filler / polypropylene composite |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8828520D0 (en) | 1989-01-11 |
| JPH01149845A (en) | 1989-06-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |