JP2003082179A - Polyolefinic resin composition and its molded form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a polyolefinic resin composition excellent in mechanical properties and adhesiveness with a transparent glossy resin, and to provide its molded form and its molded product. SOLUTION: The polyolefinic resin composition comprises: (A) 20-95 wt.% of a crystalline polypropylene resin wherein an isotactic pentad fraction rate (IPF) of a propylene homopolymer part is not less than 95%, MFR is 1-500 g/10 min and a 40 deg.C-soluble component amount by TREF is 0.8-30 wt.%; (B) 5-80 wt.% of a cyclic olefinic polymer wherein transmittance of visible light ray is not less than 80%, a glass transition temperature (Tg) is 50-150 deg.C and MFR is 1-200 g/10 min; and (C) talc having an average particle size of not more than 20 μm and which is contained in an amount of 1-400 pts.wt. to 100 pts.wt. of sum of components (A) and (B), and the molded form and the molded product are provided from this composition.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a polyolefin resin composition having excellent mechanical properties and molding processability, which is suitable for various industrial parts containing a crystalline polypropylene resin, a cyclic olefin polymer, and talc. The present invention relates to a molded product made of a resin composition, and a heat-sealed molded product product with the molded product.

[0002]

2. Description of the Related Art The use of polypropylene resin compositions obtained by blending a polypropylene resin with an ethylene-based thermoplastic elastomer component and an inorganic filler such as talc for industrial parts such as automobile parts and home appliances has been Widely known. And polypropylene resin and various rubber components,
It has been proposed to improve moldability, mechanical properties, appearance, etc. by examining various inorganic fillers.

In particular, in order to improve the mechanical properties of the polyolefin resin, a method of blending the polyolefin resin with an inorganic filler or engineering plastic has been widely known. However, although the rigidity and the heat resistance are improved only by adding the inorganic filler, the strength and the scratch resistance are insufficient. When adding engineering plastics to polyolefin,
Although rigidity and strength can be improved, in most cases,
There were many problems in practical use, such as the need for a special and expensive compatibilizer and the need to raise the processing temperature.

Further, considering the combination of molded bodies,
It is possible to obtain various advantages such as high gloss, easy paintability, and high transparency if it is possible to adhere and coat inexpensive polyolefins with excellent chemical resistance with different polymers such as polystyrene and PMMA by thermal adhesion. It is considered to be extremely useful.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above demands for development, and an object thereof is to provide a polyolefin resin composition having excellent mechanical properties and excellent adhesion to a transparent gloss resin.

[0006]

As a result of intensive studies to solve the above problems, the present inventors have identified a specific cyclic olefin polymer and a specific talc as a specific crystalline polypropylene resin. It has been found that a polyolefin resin composition having excellent mechanical properties and excellent adhesion to a transparent resin can be obtained by blending in a ratio, and the present invention has been completed.

That is, according to the first aspect of the present invention,
A polyolefin-based resin composition comprising the following components (A) to (C) is provided. (A) Isotactic pentad fraction (IPF) of propylene homopolymer portion is 95% or more, and melt flow rate (230 ° C., 2.16 kg load) is 1 to 500 g /
Crystalline polypropylene resin having a content of 10 minutes and a soluble component amount of 40 ° C. by temperature rising elution fractionation of 0.8 to 30% by weight: 20 to 95% by weight (B) having a saturated cyclic olefin structure in the molecule, A cyclic olefin polymer having a visible light transmittance of 80% or more, a glass transition temperature (Tg) of 50 to 150 ° C., and a melt flow rate (230 ° C., 2.16 kg load) of 1 to 1.
200 g / 10 minutes of cyclic olefin polymer: 5
80% by weight (C) Talc having an average particle size of 20 μm or less: 1 to 400 parts by weight based on 100 parts by weight of the total of the components (A) and (B).

According to the second aspect of the present invention, the glass transition temperature (Tg) of the cyclic olefin polymer is 70 to.
120 ℃, melt flow rate (230 ℃, 2.16k
g load) is 3 to 200 g / 10 minutes, and the polyolefin-based resin composition according to the first invention is provided.

According to the third aspect of the present invention, the following component (D) is further contained in an amount of 1 to 100 parts by weight based on 100 parts by weight of the total of the components (A) and (B). The polyolefin resin composition according to the first or second invention is provided. (D) Polyolefin-based or styrene-based elastomer

According to a fourth aspect of the present invention, the polyolefin of any one of the first to third aspects is characterized in that the heat fusion strength with the cyclic olefin polymer is 2 MPa or more. A resin composition is provided.

According to a fifth aspect of the present invention, the first aspect
A molded product obtained by subjecting the polyolefin resin composition according to any one of the inventions 1 to 4 to molding is provided.

According to the sixth aspect of the present invention, the heat fusion strength of the cyclic olefin polymer with the molded product is 2 MPa.
The molded article according to the fifth aspect of the invention is provided as described above.

According to the seventh aspect of the present invention, the fifth aspect
Alternatively, in 6 there is provided a molded product obtained by heat-sealing the molded product according to the invention and the molded product of a cyclic olefin polymer.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention comprises (A) a crystalline polypropylene resin, (B) a cyclic olefin polymer, and (C).
It is a polyolefin resin composition containing talc, and optionally (D) an elastomer, a molded product thereof, and a heat fusion molded product. Each component, molded body and product will be described in detail below.

[I] Constituent Component (A) of Polyolefin Resin Composition (A) Crystalline Polypropylene Resin The crystalline polypropylene resin (A) component used in the present invention is propylene homopolymer or propylene which is a copolymer with ethylene. It is an ethylene block copolymer.
The component (A) may be a single component or a combination of two or more components as long as it satisfies the following properties.

The isotactic pentad fraction (IPF) of the propylene homopolymer portion in the crystalline polypropylene resin used in the present invention is 95% or more, preferably 96 to 99% or more. If the IPF is less than 95%, the heat resistance rigidity is insufficient. Here, the isotactic pentad fraction (IPF) is an isotactic fraction in pentad units in a polypropylene molecular chain measured by ¹³ C-NMR.

The melt flow rate of the crystalline polypropylene resin used in the present invention (MFR: 230 ° C., 2.16 k
g load) is 1 to 500 g / 10 minutes, preferably 10
It is 100 g / 10 minutes. If the MFR is less than 1 g / 10 minutes, the moldability will be poor, and if it exceeds 500 g / 10 minutes, the impact resistance will be deteriorated. MFR of the above crystalline polypropylene resin
May be adjusted at the time of polymerization, or adjusted after polymerization with an organic peroxide such as diacyl peroxide or dialkyl peroxide.

The temperature of the crystalline polypropylene resin used in the present invention was 0 using orthodichlorobenzene as a solvent.
The elution fraction at 40 ° C. in the temperature rising elution fractionation (TREF) between ˜140 ° C. is 0.8 to 30 with respect to the total elution amount.
% By weight, preferably 1 to 20% by weight. When the elution content at 40 ° C. in TREF is less than 0.8% by weight,
The weldability is poor, and if it exceeds 30% by weight, the heat resistance is poor.

Here, the temperature rising elution fractionation (Temper
ature Rising Elution Frac
measurement is performed by Journal of Applied Polymer Science "Jour.
nal of Applied Polymer Sc
ience, Vol 26, 4217-4231. (1
981) "and" Polymer Papers 2P1C09 (19
It is carried out as follows based on the principle described in 1985).

The polymer to be measured is completely dissolved in a solvent (orthodichlorobenzene). Then, it is cooled to form a thin polymer layer on the surface of the inert carrier.
In such a polymer layer, the one that is easily crystallized is formed on the inside (the side close to the surface of the inert carrier), and the one that is difficult to crystallize is formed on the outside. Next, when the temperature is raised continuously or stepwise, in the low temperature step, the amorphous portion in the target polymer composition, that is, the one having a large degree of branching of the short chain branch possessed by the polymer, is eluted, and the temperature gradually rises. Those with a low degree of branching elute, and finally the straight-chain portion without branching elutes and the measurement ends. It is possible to detect the concentration of the elution component at such temperature and to see the composition distribution of the polymer from the graph drawn by the elution amount and the elution temperature.

The crystalline polypropylene resin used in the present invention may be produced by any method as long as it is a method for producing a polymer satisfying the above physical properties. For example, it can be produced using any polymerization catalyst such as a Ziegler-Natta catalyst or a metallocene catalyst which is a highly stereoregular catalyst. In the presence of the above catalyst, a production process such as a gas phase fluidized bed method, a solution method or a slurry method is applied to obtain a propylene homopolymer or a propylene / ethylene block copolymer.

The blending amount of the above crystalline polypropylene resin is 20 to 95% by weight, preferably 40 to 80% by weight in the propylene resin composition of the present invention. If the blending amount is less than 20% by weight, chemical resistance and economical efficiency are poor, and 95
If it exceeds 5% by weight, the effect of improving strength and weldability is poor.

(B) Cyclic olefin polymer The cyclic olefin polymer used in the present invention is a polymer obtained by hydrogenating a cycloolefin polymer having an ethylenic double bond in the ring, It is a polymer obtained by ring-opening (co) polymerizing cycloolefins such as norbornene-based monomers obtained by condensing cyclopentadiene and a corresponding olefin by the Diels-Alder reaction or the like and hydrogenating. Commercially available products include "Apel" (trade name) manufactured by Mitsui Chemicals, "Zeonoa" (trade name) manufactured by Nippon Zeon Co., Ltd., "Arton" (trade name) manufactured by JSR Co., Ltd., etc. Is mentioned.

In particular, the cyclic olefin polymer (B) component used in the present invention has the formula (1)

[0025]

[Chemical 1] Or formula (2)

[0026]

[Chemical 2] (In each formula, R ^{1 to} R ⁴ are each independently a hydrogen atom,
Hydrocarbon group, halogen atom, hydroxyl group, ester group, alkoxy group, cyano group, amide group, imide group, silyl group,
Alternatively, it is a hydrocarbon group substituted with a polar group (that is, a halogen atom, a hydroxyl group, an ester group, an alkoxy group, a cyano group, an amide group, an imide group, or a silyl group).
However, two or more of R ^{1 to} R ⁴ may be bonded to each other to form an unsaturated bond, a monocycle or a polycycle, and the monocycle or the polycycle has a double bond. Alternatively, it may form an aromatic ring. R ¹ and R ² or R ³ and R ⁴ may form an alkylidene group. R ⁵ and R
⁶ is independently a hydrogen atom, an alkyl group, or an aryl group. ... represents a carbon-carbon single bond or a double bond. n and m are n + m = 1, n = 0.2
.About.1, m = 0 to 0.8. A polymer having a repeating unit represented by the formula (1) is preferable, and specific examples thereof include the cyclic olefin-based polymers described in JP-A-10-60048.

The cyclic olefin polymer used in the present invention is a cyclic olefin polymer having a visible light transmittance of 80% or more, preferably 90% or more, among the above cyclic olefin polymers. Even if the visible light transmittance is less than 80%, the effect of improving the physical properties can be obtained, but the transparency is insufficient and the commercial value is remarkably reduced, which is not preferable.

Further, the glass transition temperature (Tg) of the cyclic olefin polymer used in the present invention is 50 to 150 ° C.
It is preferably 70 to 120 ° C. Glass transition temperature is 5
If it is less than 0 ° C, the heat resistance is insufficient. If the temperature exceeds 150 ° C, the moldability will be poor.

Further, the melt flow rate of the cyclic olefin polymer used in the present invention (MFR: 230 ° C., 2.1
6 kg load) is 1 to 200 g / 10 minutes, preferably 3
~ 20 g / 10 minutes. If the MFR is less than 1 g / 10 minutes, the moldability will be poor, and if it exceeds 200 g / 10 minutes, the impact resistance will be poor.

The amount of the cyclic olefin polymer compounded is
It is 5 to 80% by weight, preferably 20 to 60% by weight in the polyolefin resin composition of the present invention. If the amount is less than 5% by weight, the chemical resistance and economy are poor, and if it exceeds 60% by weight, the effect of improving strength and weldability is poor.

(C) Talc The talc (D) component constituting the polyolefin resin composition of the present invention has an average particle size of 20 μm or less, preferably 4
˜15 μm. If the average particle size exceeds 20 μm, the mechanical properties will deteriorate. The average particle size is measured by a laser diffraction method (for example, LA920W manufactured by Horiba Ltd.) or a liquid layer sedimentation method light transmission method (for example, CP type manufactured by Shimadzu Corporation), which is a cumulative amount 5 read from a particle size cumulative distribution curve.
It can be determined from the particle size value of 0% by weight. The value of the present invention is an average particle diameter value measured by the former method.

These talcs can be obtained by further finely classifying those obtained by mechanically pulverizing the naturally produced ones. Further, it is possible to further classify the material which has been roughly classified once. Examples of the method for mechanically crushing include a method using a crusher such as a jaw crusher, a hammer crusher, a roll crusher, a screen mill, a jet crusher, a colloid mill, a roller mill and a vibration mill. These crushed talc are mixed with a device such as a cyclone, a cyclone air separator, a micro separator or a sharp cut separator to adjust the average particle size shown in the present invention.
Wet or dry classification is performed repeatedly or repeatedly. When the talc used in the present invention is produced, it is preferable to carry out a classification operation with a sharp cut separator after pulverizing it to a specific particle size.

These talcs are grafted with various organic titanate coupling agents, organic silane coupling agents, unsaturated carboxylic acids, or their anhydrides for the purpose of improving the adhesiveness or dispersibility with polymers. You may use what surface-treated with modified polyolefin, fatty acid, fatty acid metal salt, fatty acid ester, etc.

The amount of the talc compounded is 1 to 400 parts by weight, preferably 10 to 1 with respect to 100 parts by weight of the components (A) and (B) in the polyolefin resin composition of the present invention.
It is 00 parts by weight. If the blending amount of talc is less than 1 part by weight, mechanical properties are insufficient, and if it exceeds 400 parts by weight, there is a practical adverse effect such as an increase in weight.

(D) Polyolefin-based or Styrene-based Elastomer The polyolefin-based resin composition of the present invention may further contain a polyolefin-based or styrene-based elastomer (D) component, if necessary. (D)
The components have the effect of improving impact resistance and exhibiting good moldability, physical properties, and shrinkage characteristics.

Polyolefin elastomer component (D-
Examples of 1) include an ethylene / α-olefin copolymer elastomer, and specifically, a copolymer elastomer of ethylene and 1-octene or 1-butene is preferable. In the copolymer elastomer of ethylene and 1-octene or 1-butene, the copolymerization comonomer content is 28% by weight or more, and the MFR (230 ° C., 2.16 kg load) is 0.5 to 20 g / 10 minutes, preferably Is 0.7-1
Those in the range of 5 g / 10 minutes are used. When the MFR of the elastomer is less than the above range, the tensile elongation becomes insufficient, and when it exceeds the above range, the heat distortion temperature becomes insufficient. When the comonomer content is less than 28% by weight, the heat distortion temperature is poor. The ethylene / octene copolymer elastomer and / or the ethylene / butene copolymer elastomer component does not have to be one type, and may be a mixture of two or more types.

The ethylene / octene copolymer elastomer and / or ethylene / butene copolymer elastomer is obtained by copolymerizing ethylene with 1-octene or 1-butene. Polymerization with a titanium compound such as a titanium halide and an organoaluminum-magnesium complex such as an alkylaluminum-magnesium complex or an alkylalkoxyaluminum-magnesium complex, a so-called Ziegler type catalyst such as an alkylaluminum or an alkylaluminum chloride or a metallocene compound is possible. However, when a metallocene compound is used for the polymerization, a copolymer having more preferable effects can be obtained. As the polymerization method, a production process such as a gas phase fluidized bed method, a solution method or a slurry method can be applied to carry out the polymerization.

As the styrene elastomer component (D-2), water having a styrene content (A segment content) represented by the (AB) or (ABAA) structure is 1 to 25% by weight. An additional block copolymer rubber may be used. However, A shows a polystyrene structure and B shows an ethylene butene or ethylene propylene structure. Specific examples of the styrene-based hydrogenated block copolymer rubber include styrene / ethylene / butene / styrene block copolymer (S
EBS) and styrene / ethylene / propylene / styrene block copolymer (SEPS).

The amount of the above polyolefin-based elastomer or styrene-based elastomer component (D) to be compounded is from 1 to 100 relative to 100 parts by weight of the total of the components (A) and (B) of the propylene resin composition of the present invention. The amount by weight is preferably, more preferably 5 to 80 parts by weight, particularly preferably 10 to 60 parts by weight. The amount of component (D) is 1
If it exceeds 100 parts by weight, the heat resistance becomes insufficient.

(E) Additional component (optional component) In the polypropylene resin composition of the present invention, in addition to the above-mentioned essential components (A) to (C) and, if necessary, the component (D). Other additional components (optional components) can be added to the extent that the effects of the present invention are not significantly impaired. As such additional components (optional components), phenol-based and phosphorus-based antioxidants, hindered amine-based, benzophenone-based, benzotriazole-based weathering deterioration inhibitors, nucleating agents such as organoaluminum compounds and organophosphorus compounds, Dispersants represented by metal salts of stearic acid, quinacridone, perylene, phthalocyanine, titanium oxide,
Coloring substances such as carbon black, fibrous potassium titanate, fibrous magnesium oxysulfate, fibrous aluminum borate, whiskers such as calcium carbonate, mica, wollastonite, substances such as carbon fibers and glass fibers,
Examples of the resin include propylene / ethylene random copolymer, polyethylene, ethylene copolymer, chemically modified polyolefin, polystyrene, and ABS resin.

[II] Method for producing polyolefin resin composition In the polyolefin resin composition of the present invention, the above-mentioned components are used in a conventional extruder, Banbury mixer, roll, Brabender plastograph, kneader, etc. It is produced by kneading at a set temperature of 180 ° C. to 250 ° C. Among these, it is preferable to use an extruder, particularly a twin-screw extruder.

The method of molding the polyolefin resin composition of the present invention is not particularly limited, and it is generally carried out in the field of synthetic resins such as extrusion molding method, injection molding method, injection compression molding method and hollow molding method. Molding is performed by applying a molding method such as a molding method, but from the viewpoint of the effect of the invention to be achieved, it is suitable to use the injection molding method.

[III] Polyolefin Resin Composition The polyolefin resin composition of the present invention produced by the above method has transparency, flexural modulus, heat distortion temperature characteristics,
It has excellent physical properties such as tensile elongation and is also excellent in heat fusion with a cyclic olefin polymer. In particular, the heat fusion strength with the cyclic olefin polymer is 2 MPa or more, preferably 2.5 MPa or more. Here, the cyclic olefin polymer which is heat-sealed with the polyolefin resin composition of the present invention has a visible light transmittance of 80% or more and a glass transition temperature (Tg) of 50 to 150 ° C., preferably 70 to 120.
℃, melt flow rate (230 ℃, 2.16kg load) 1 ~ 200g / 10 minutes, preferably 3 ~ 200g
A cycloolefin polymer characterized by being / 10 minutes is preferable.

The polyolefin resin composition of the present invention is
Since it is a material capable of exhibiting the above performance, it can be used as various molded products. In particular, since it is excellent in compatibility and adhesiveness with a cyclic olefin polymer having excellent transparency, it can be used as various containers such as food containers, windows, and sealed lamp materials.

[0045]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to the examples. The measuring methods in the examples and the raw materials used in the examples are as follows.

1. Measurement method (1) MFR: 2.16 based on JIS-K7210
It was measured at a temperature of 230 ° C. under a load of kg. (2) Tensile yield stress: 2 according to JIS-K7113
It was measured at a pulling speed of 50 mm / min at 3 ° C. (3) Tensile breaking elongation: in accordance with JIS-K7113,
It was measured at 23 ° C. and a pulling speed of 50 mm / min. (4) Bending stress: in accordance with JIS-K7203, 23 ° C
At a bending speed of 2 mm / min. (5) Flexural modulus: 23 according to JIS-K7203
It was measured at a bending speed of 2 mm / min at 0 ° C. (6) Izod impact value: Measured at 23 ° C. according to JIS-K7110. (7) HDT (heat distortion temperature): Measured under a 0.45 MPa load in accordance with JIS-K7207. (8) Fusing strength: Cyclic olefin polymer and polyolefin resin composition, each of the tensile test specimens were cut in half at the center, and then the cut surface was heated on a hot plate at 260 ° C. and immediately heated. After joining the surfaces, they were allowed to cool. 23 ° C, 72
After a lapse of time, the bonding strength after fusion was determined by a tensile test (test speed: 5 mm / min). (9) Isotactic pentad fraction (IPF):
^{Using 13} C-NMR, Macromolecule,
It was measured based on the method described in 8,687 (1975). (10) Elution content in TREF: As a measuring device, a cross fractionation device (“CFCT150A” manufactured by Mitsubishi Chemical Corporation) was used. Using ortho-dichlorobenzene as the solvent,
The sample is completely dissolved in the solvent at 140 ° C. The sample solution is injected at 140 ° C. into a column packed with an inert carrier (glass beads), and then cooled at a temperature lowering rate of 10 ° C./hour to form a thin polymer layer on the surface of the inert carrier (glass beads). Finally cool to 0 ° C. Then, while elevating the temperature at a rate of temperature increase of 15 ° C./hour, the components that were continuously eluted at a constant flow rate of 1.0 ml were detected online. The concentration of the eluted portion at each temperature was detected, and the ratio of the amount eluted at 0 to 40 ° C was obtained from the graph drawn by the amount of the eluted portion and the elution temperature.

2. Raw material (1) Crystalline polypropylene (A) Ethylene / propylene block copolymer (B) shown in Table 1
PP) and propylene homopolymer (HPP) were used.

[0048]

[Table 1]

(2) Cyclic Olefin Polymer A cyclic olefin polymer (COP) shown in Table 2 obtained by ring-opening polymerization using norbornene as a monomer and a Ziegler catalyst was used.

[0050]

[Table 2]

(3) Talc (D) Talc-1: P-2 (manufactured by Matsumura Sangyo), average particle diameter 11 μm
(Horiba Seisakusho Laser Scattering Particle Size Analyzer LA9
20 weight average value) Talc-2: DR (Matsumura Sangyo), average particle size 28 μm
(Horiba Seisakusho Laser Scattering Particle Size Analyzer LA9
Weight average value obtained by 20)

(4) Elastomer The elastomer component (D) shown in Table 3 was used.

[0053]

[Table 3]

Examples 1 to 11 and Comparative Examples 1 to 5 Raw materials were blended in the composition ratios shown in Tables 4 and 5, and dry blended with a super floater (manufactured by Kawata). Melt kneading was performed using a twin-screw kneader (KTX44 manufactured by Kobe Steel, Ltd.) under the condition of 40 kg / h. In addition, as a heat stabilizer at the time of melt-kneading, tetrakis [methylene-3- (3'5'-di-t-butyl-
4'-hydroxyphenyl) propionate] methane (Ciba Specialty Chemicals Irganox 1
010) was added to 100 parts by weight of the resin composition in an amount of 0.1 parts by weight. After the melt-kneading, various test pieces were prepared by injection molding (250 ° C., mold temperature 40 ° C.) for various tests, and the measurement was performed according to the above-mentioned various measuring methods. The evaluation results are shown in Tables 4 and 5.

[0055]

[Table 4]

[0056]

[Table 5]

As is clear from Tables 4 and 5, the polyolefin resin composition of the present invention is excellent in flexural modulus, heat distortion temperature characteristic (HDT), tensile elongation and heat fusion strength with a cyclic olefin polymer. It is a composition (Examples 1 to 1)
1). On the other hand, the resin composition containing no cyclic olefin polymer is inferior in heat fusion strength to the cyclic olefin polymer (Comparative Example 1), and the resin composition using the polypropylene resin having too much TREF40 ° C. soluble component is The resin composition using talc, which is inferior in flexural modulus and stress (Comparative Example 2) and has an excessively large average particle size, is inferior in heat distortion temperature (HDT) (Comparative Example 3), and has too little TREF40 ° C. soluble component polypropylene. A resin composition containing a resin and not using talc was inferior in flexural modulus and stress (Comparative Example 4), and a resin composition using a polypropylene resin having too little TREF40 ° C. soluble component was a cyclic olefin polymer. Uses a polypropylene resin that is inferior in heat fusion strength (Comparative Example 5) and has too little TREF40 ° C soluble component, and uses a cyclic olefin polymer having a too low glass transition temperature. , A resin composition not using talc was inferior in flexural modulus and stress (Comparative Example 6), and a resin composition using a cycloolefin polymer having a glass transition temperature too high was melted by heat with a cycloolefin polymer. It had poor wearing strength (Comparative Example 7).

[0058]

The polyolefin resin composition of the present invention can be used as various molded articles because it is a material capable of exhibiting the above performance. In particular, since it is excellent in compatibility and adhesiveness with a cyclic olefin polymer having excellent transparency, it can be used as various containers such as food containers, windows, and sealed lamp materials.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C08L 53/00 C08L 53/00 53/02 53/02 65/00 65/00 (72) Inventor Ikuo Tsutsumi 1 Toho-cho, Yokkaichi-shi, Mie Japan Polychem Co., Ltd. Material Development Center (72) Inventor Goshi Imamura 1-hour, Toho-cho, Yokkaichi-shi, Mie Japan Polychem Co., Ltd. Material Development Center F-term (reference) 4F071 AA15 AA20 AA75 AA80 AA86 AA88 AA89 AB26 AB30 AF30 AH12 AH17 AH19 BA01 BB03 BB05 BB06 BC04 BC17 4J002 BB053 BB12W BB153 BK00X BP013 BP02W CE00X DJ046 FD016 GFDQ GD090 GD090 GFDQ GD090 GD090 GD090 GFDQG

Claims (7)

[Claims] 1. A polyolefin-based resin composition comprising the following components (A) to (C). (A) Isotactic pentad fraction (IPF) of propylene homopolymer portion is 95% or more, and melt flow rate (230 ° C., 2.16 kg load) is 1 to 500 g /
Crystalline polypropylene resin having a content of 10 minutes and a soluble component amount of 40 ° C. by temperature rising elution fractionation of 0.8 to 30% by weight: 20 to 95% by weight (B) having a saturated cyclic olefin structure in the molecule, A cyclic olefin polymer having a visible light transmittance of 80% or more, a glass transition temperature (Tg) of 50 to 150 ° C., and a melt flow rate (230 ° C., 2.16 kg load) of 1 to 1.
200 g / 10 minutes of cyclic olefin polymer: 5
80% by weight (C) Talc having an average particle size of 20 μm or less: 1 to 400 parts by weight based on 100 parts by weight of the total of the components (A) and (B). 2. The glass transition temperature (Tg) of the cyclic olefin polymer is 70 to 120 ° C., and the melt flow rate (2
The polyolefin resin composition according to claim 1, wherein the polyolefin resin composition has a temperature of 30 ° C and a load of 2.16 kg of 3 to 200 g / 10 minutes. 3. The composition according to claim 1 or 2, further comprising 1 to 100 parts by weight of the following component (D) with respect to 100 parts by weight of the total of the components (A) and (B). The polyolefin resin composition described. (D) Polyolefin-based or styrene-based elastomer 4. The polyolefin resin composition according to claim 1, which has a heat fusion strength with a cyclic olefin polymer of 2 MPa or more. 5. A molded product obtained by subjecting the polyolefin resin composition according to any one of claims 1 to 4 to molding. 6. The molded product according to claim 5, which has a heat fusion strength of 2 MPa or more with the molded product of the cyclic olefin-based polymer. 7. A molded product obtained by heat-sealing the molded product according to claim 5 or 6 and a molded product of a cyclic olefin polymer.