阅读说明：本技术 烯烃系聚合物组合物 (Olefin polymer composition ) 是由 石川谅 佐佐木将寿 楠本玲实 于 2020-03-24 设计创作，主要内容包括：本发明涉及一种聚合物组合物、以及由上述聚合物组合物获得的成型体及包括将上述聚合物组合物进行注射成型的注射成型体的制造方法,该聚合物组合物包含：(A)包含来源于乙烯的构成单元和来源于碳原子数3～20的α-烯烃的构成单元的共聚物65～35质量份；(B)由DSC测定得到的熔点为135～170℃的丙烯系聚合物35～65质量份(其中,将成分(A)和(B)的合计设为100质量份)；(C)相对于成分(A)和(B)的合计100质量份为0.01～0.50质量份的分子量310～5000的脂肪酸酰胺；以及(D)相对于成分(A)和(B)的合计100质量份为0.01～0.50质量份的分子量298以下的脂肪酸酰胺,在将成分(C)的量设为Wc,将成分(D)的量设为Wd的情况下,Wc/Wd为0.5～1.5,并且成分(A)没有交联。(The present invention relates to a polymer composition, a molded article obtained from the polymer composition, and a method for producing an injection molded article comprising injection molding the polymer composition, the polymer composition comprising: (A) 65 to 35 parts by mass of a copolymer containing a constituent unit derived from ethylene and a constituent unit derived from an alpha-olefin having 3 to 20 carbon atoms; (B) 35 to 65 parts by mass of a propylene polymer having a melting point of 135 to 170 ℃ as measured by DSC (wherein the total of the components (A) and (B) is 100 parts by mass); (C) 0.01 to 0.50 parts by mass of a fatty acid amide having a molecular weight of 310 to 5000 relative to 100 parts by mass of the total of the components (A) and (B); and (D) 0.01 to 0.50 parts by mass of a fatty acid amide having a molecular weight of 298 or less relative to 100 parts by mass of the total of the components (A) and (B), wherein when the amount of the component (C) is Wc and the amount of the component (D) is Wd, Wc/Wd is 0.5 to 1.5, and the component (A) is not crosslinked.)

1. A polymer composition comprising:

(A) 65 to 35 parts by mass of a copolymer containing a constituent unit derived from ethylene and a constituent unit derived from an alpha-olefin having 3 to 20 carbon atoms;

(B) 35 to 65 parts by mass of a propylene polymer having a melting point of 135 to 170 ℃ as measured by DSC,

wherein the total of the components (A) and (B) is 100 parts by mass;

(C) 0.01 to 0.50 parts by mass of a fatty acid amide having a molecular weight of 310 to 5000 relative to 100 parts by mass of the total of the components (A) and (B); and

(D) 0.01 to 0.50 parts by mass of a fatty acid amide having a molecular weight of 298 or less based on 100 parts by mass of the total of the components (A) and (B),

when the amount of the component (C) is Wc and the amount of the component (D) is Wd, Wc/Wd is 0.5 to 1.5 and the component (A) is not crosslinked.

2. The polymer composition according to claim 1, wherein the amount of the component (C) and the amount of the component (D) are 0.10 to 0.50 parts by mass, respectively.

3. The polymer composition according to claim 1 or 2, wherein the component (C) and the component (D) are both linear fatty acid amides.

4. The polymer composition according to any one of claims 1 to 3, component (C) being erucamide.

5. A polymer composition according to any one of claims 1 to 4, component (D) being oleamide.

6. A molded article obtained from the polymer composition according to any one of claims 1 to 5.

7. A method for producing an injection molded body, comprising: injection molding the polymer composition according to any one of claims 1 to 5.

Technical Field

The present invention relates to an olefin polymer composition.

Background

It is known to add a lubricant to an olefinic thermoplastic polymer composition. In the technique of patent document 1, a higher fatty acid amide is added as a lubricant in order to ensure releasability when the molded article is taken out from the mold and slidability of the surface of the molded article.

The technique of patent document 1 relates to a thermoplastic elastomer obtained by dynamically heat-treating a composition to which a lubricant is added in the presence of an organic peroxide and a crosslinking assistant.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 11-208404 (claim 1, paragraph 0019)

Disclosure of Invention

Problems to be solved by the invention

According to the knowledge of the present inventors, it is considered that the composition containing the crosslinked product also has the assisting power of the crosslinked product, and is originally excellent in releasability from a mold. On the other hand, in the composition containing no crosslinked material, there is no assisting force of the crosslinked material, and in order to produce a molded article smoothly, it is necessary to improve the mold release property by adding a lubricant, but if the amount added is increased, the appearance is poor due to bleeding, and the fogging property is deteriorated, which is problematic.

The present invention addresses the problem of providing an olefin polymer composition that has excellent mold release properties even when the olefin polymer composition does not contain a crosslinked material and contains a small amount of lubricant.

Means for solving the problems

The gist of the present invention is as follows.

(1) A polymer composition comprising:

(A) 65 to 35 parts by mass of a copolymer containing a constituent unit derived from ethylene and a constituent unit derived from an alpha-olefin having 3 to 20 carbon atoms;

(B) 35 to 65 parts by mass of a propylene polymer having a melting point of 135 to 170 ℃ as measured by DSC (wherein the total of the components (A) and (B) is 100 parts by mass);

(C) 0.01 to 0.50 parts by mass of a fatty acid amide having a molecular weight of 310 to 5000 relative to 100 parts by mass of the total of the components (A) and (B); and

(D) 0.01 to 0.50 parts by mass of a fatty acid amide having a molecular weight of 298 or less based on 100 parts by mass of the total of the components (A) and (B),

when the amount of the component (C) is Wc and the amount of the component (D) is Wd, Wc/Wd is 0.5 to 1.5 and the component (A) is not crosslinked.

(2) The polymer composition according to the above (1), wherein the amount of the component (C) and the amount of the component (D) are 0.10 to 0.50 parts by mass, respectively.

(3) The polymer composition according to the above (1) or (2), wherein the component (C) and the component (D) are both linear fatty acid amides.

(4) The polymer composition according to any one of the above (1) to (3), wherein the component (C) is erucamide.

(5) The polymer composition according to any one of the above (1) to (4), wherein the component (D) is oleamide.

(6) A molded article obtained from the polymer composition according to any one of the above (1) to (5).

(7) A method for producing an injection molded body, comprising: injection molding the polymer composition according to any one of (1) to (5) above.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, an olefin polymer composition having excellent mold release properties can be provided with a small amount of lubricant added even without containing a crosslinked material.

Detailed Description

< ingredient (A): copolymer comprising ethylene-derived constituent unit and carbon-atom-3-20-derived constituent unit of alpha-olefin

In the present invention, the copolymer containing a constituent unit derived from ethylene and a constituent unit derived from an α -olefin having 3 to 20 carbon atoms (hereinafter referred to as "ethylene copolymer (a)") used as the component (a) is preferably a copolymer mainly composed of ethylene and an α -olefin having 3 to 20 carbon atoms, and examples thereof include an amorphous random copolymer composed of ethylene and an α -olefin having 3 to 20 carbon atoms, an amorphous random copolymer composed of ethylene, an α -olefin having 3 to 20 carbon atoms and a nonconjugated polyene, and from the viewpoint of thermal stability, an amorphous random copolymer containing no constituent unit derived from a polyene is preferably used.

Specific examples of the α -olefin include propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 2-methyl-1-propene, 3-methyl-1-pentene, 4-methyl-1-pentene, and 5-methyl-1-hexene. Among them, propylene, 1-butene, 4-methyl-1-pentene, 1-hexene and 1-octene are preferable. Particularly preferred is 1-butene. These alpha-olefins may be used alone or in combination of 2 or more.

The molar ratio of ethylene to the alpha-olefin having 3 to 20 carbon atoms in the ethylene copolymer (A) is usually 55/45 to 85/15, preferably 60/40 to 83/17.

Specific examples of the non-conjugated polyene include cyclic dienes such as dicyclopentadiene, cyclooctadiene, methylenenorbornene (e.g., 5-methylene-2-norbornene), ethylidenenorbornene (e.g., 5-ethylidene-2-norbornene), methyltetrahydroindene, 5-vinyl-2-norbornene, 5-isopropylidene-2-norbornene, 6-chloromethyl-5-isopropenyl-2-norbornene, norbornadiene, and the like; 1, 4-hexadiene, 3-methyl-1, 4-hexadiene, 4-methyl-1, 4-hexadiene, 5-methyl-1, 4-hexadiene, 4, 5-dimethyl-1, 4-hexadiene, 6-methyl-1, 6-octadiene, 7-methyl-1, 6-octadiene, 6-ethyl-1, 6-octadiene, 6-propyl-1, 6-octadiene, 6-butyl-1, 6-octadiene, 6-methyl-1, 6-nonadiene, 7-methyl-1, 6-nonadiene, 6-ethyl-1, 6-nonadiene, 7-ethyl-1, 6-nonadiene, 4-methyl-1, 4-hexadiene, 5-methyl-1, 4-hexadiene, 6-octadiene, Chain dienes such as 6-methyl-1, 6-decadiene, 7-methyl-1, 6-decadiene, 6-methyl-1, 6-undecadiene and 7-methyl-1, 6-octadiene; trienes such as 2, 3-diisopropylidene-5-norbornene and 2-ethylidene-3-isopropylidene-5-norbornene. When the nonconjugated polyene is present, the iodine value of the ethylene copolymer (A) is usually 0.1 to 20, preferably 1 to 20.

The ethylene copolymer (a) is preferably an ethylene-1-butene copolymer.

The density of the ethylene copolymer (A) is usually 850 to 870kg/m³Preferably 855 to 870kg/m³。

The MFR (ISO1133, 190 ℃, 2.16kg load) of the ethylene copolymer (A) is usually 0.1 to 50g/10 min, preferably 0.1 to 10g/10 min.

The MFR (ISO1133, 230 ℃, 2.16kg load) of the ethylene copolymer (A) is usually 0.2 to 100g/10 min, preferably 0.2 to 20g/10 min.

Mooney viscosity [ ML ] of ethylene copolymer (A)₁₊₄(125℃)]Generally 35 to 300, preferably 40 to 160.

The ethylene copolymer (a) preferably has a melting point (Tm) of 170 ℃ or lower (preferably 100 ℃ or lower, and more preferably 90 ℃ or lower) as determined by Differential Scanning Calorimetry (DSC), or is not observed. Here, the phrase "the melting point is not observed" means that the heat of fusion (. DELTA.H) is less than 1J/g.

The ethylene copolymer (a) used in the present invention may be a so-called oil-extended rubber in which a softener, preferably a mineral oil softener, is blended during the production thereof. Examples of the mineral oil-based softener include conventionally known mineral oil-based softeners, such as paraffin-based process oil.

The amount of the ethylene copolymer (A) is 35 to 65 parts by mass, preferably 45 to 60 parts by mass, based on 100 parts by mass of the total of the ethylene copolymer (A) and the propylene polymer (B). If the amount of the ethylene copolymer (a) is less than 35 parts by mass, the rigidity may be increased and the impact resistance at low temperatures may be significantly deteriorated, while if it exceeds 65 parts by mass, the flowability and crystallinity may be insufficient, and the ethylene copolymer (a) may not be suitable for injection molding.

In the present invention, it is necessary that the ethylene copolymer (a) is not crosslinked from the viewpoint of the mold release effect by the lubricant.

< ingredient (B): propylene-based polymer

In the present invention, examples of the propylene-based polymer (hereinafter referred to as "propylene-based polymer (B)") used as the component (B) include crystalline high-molecular-weight solid products obtained by polymerizing propylene alone or propylene and 1 or 2 or more kinds of other monoolefins by a high-pressure method or a low-pressure method. Examples of such polymers include isotactic monoolefin polymers and syndiotactic monoolefin polymers.

The propylene polymer (B) can be synthesized by a conventionally known method, or a commercially available product can be used.

The propylene polymer (B) may be used alone in 1 kind, or may be used in combination of 2 or more kinds.

As the raw material olefin other than propylene in the propylene-based polymer (B), preferred is an alpha-olefin having 2 or 4 to 20 carbon atoms, and specific examples thereof include ethylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 2-methyl-1-propene, 3-methyl-1-pentene, 4-methyl-1-pentene, 5-methyl-1-hexene and the like. When these alpha-olefins having 2 or 4 to 20 carbon atoms are used, 1 kind or 2 or more kinds may be used. The polymerization system may be a random type or a block type as long as a resin-like substance can be obtained. These propylene polymers may be used alone, or 2 or more kinds thereof may be used in combination.

The MFR (ISO1133, 230 ℃, 2.16kg load) of the propylene polymer (B) is usually 20 to 200g/10 min, preferably 40 to 70g/10 min, from the viewpoint of injection moldability and impact resistance at low temperature.

The propylene polymer (B) has a melting point (Tm) of 135 to 170 ℃, preferably 155 to 165 ℃ as determined by Differential Scanning Calorimetry (DSC). If the melting point (Tm) is less than 135 ℃, the impact resistance at low temperature may be improved, while if it exceeds 170 ℃, the rigidity may be increased, and on the other hand, the impact resistance at low temperature may be deteriorated.

The density of the propylene-based polymer (B) is usually 890 to 910kg/m³Preferably 900 to 910kg/m³。

The propylene polymer (B) plays a role in improving the flowability and heat resistance of the olefin polymer composition.

The amount of the propylene polymer (B) is 35 to 65 parts by mass, preferably 40 to 55 parts by mass, based on 100 parts by mass of the total of the ethylene copolymer (A) and the propylene polymer (B). If the amount of the propylene-based polymer (B) is less than 35 parts by mass, the flowability may be insufficient and the composition may not be suitable for injection molding, and if it exceeds 65 parts by mass, the rigidity may be increased and the impact resistance at low temperature may be remarkably deteriorated.

< fatty acid amides of component (C) and component (D) >

In the present invention, a fatty acid amide is used as the component (C) and the component (D).

If the fatty acid amides as the component (C) and the component (D) are branched, they tend to stay in the resin. Therefore, in the present invention, it is preferable that both the fatty acid amides used as the component (C) and the component (D) are linear fatty acid amides, because the fatty acid amides do not stay in the resin and appropriately bleed out to the surface of the resin during molding to obtain the desired release performance.

< ingredient (C): fatty acid amide having a molecular weight of 310 to 5000

In the present invention, the fatty acid amide used as the component (C) (hereinafter referred to as "fatty acid amide (C)") is not particularly limited as long as it is a fatty acid amide having a molecular weight of 310 to 5000 and capable of functioning as a lubricant, and examples thereof include an unsaturated fatty acid amide, a saturated fatty acid amide, a substituted amide, a methylol amide, a saturated bisamide, and an unsaturated bisamide. The molecular weight of the fatty acid amide (C) is preferably 310 to 691, more preferably 310 to 400, and still more preferably 310 to 340.

Specific examples of the fatty acid amide (C) include erucamide (molecular weight 338), behenamide (molecular weight 340), and hexamethylenebisbehenamide (molecular weight 691), with erucamide and behenamide being preferred.

The amount of the fatty acid amide (C) is 0.01 to 0.50 parts by mass, preferably 0.10 to 0.50 parts by mass, and more preferably 0.10 to 0.30 parts by mass, based on 100 parts by mass of the total of the ethylene copolymer (A) and the propylene polymer (B). If the amount of the fatty acid amide (C) is less than 0.01 part by mass, the amount of the fatty acid amide (C) present on the surface of the resin during molding is small and does not contribute to mold release properties, and if it exceeds 0.50 part by mass, the fatty acid amide (C) bleeds out from the surface and causes appearance defects.

< ingredient (D): fatty acid amide having molecular weight of 298 or less

In the present invention, the fatty acid amide used as the component (D) (hereinafter referred to as "fatty acid amide (D)") is not particularly limited as long as it is a fatty acid amide having a molecular weight of 298 or less and capable of functioning as a lubricant, and examples thereof include an unsaturated fatty acid amide, a saturated fatty acid amide, a substituted amide, a methylol amide, a saturated bisamide, and an unsaturated bisamide. The molecular weight of the fatty acid amide (D) is preferably 115 to 298, more preferably 199 to 298, and still more preferably 280 to 298. When the molecular weight of the fatty acid amide (D) is within this range, it is excellent in terms of bleeding out on the surface of the molded article.

Specific examples of the fatty acid amide (D) include, for example, oleamide (molecular weight 282), stearic acid amide (molecular weight 284), lauric acid amide (molecular weight 199), caproic acid amide (molecular weight 115), and ricinoleic acid amide (molecular weight 298), with oleamide and stearic acid amide being preferred.

The amount of the fatty acid amide (D) is 0.01 to 0.50 parts by mass, preferably 0.10 to 0.50 parts by mass, and more preferably 0.10 to 0.30 parts by mass, based on 100 parts by mass of the total of the ethylene copolymer (A) and the propylene polymer (B). If the amount of the fatty acid amide (D) is less than 0.01 part by mass, the amount present on the surface of the resin during molding is small and does not contribute to mold release properties, and if it exceeds 0.50 part by mass, bleeding from the surface may cause appearance defects.

In the present invention, when the amount of the fatty acid amide (C) is Wc and the amount of the fatty acid amide (D) is Wd, Wc/Wd is 0.5 to 1.5, preferably 0.8 to 1.2. If Wc/Wd is less than 0.5, the lubricant effect may be reduced by sublimation because of a large low molecular weight, and if it exceeds 1.5, the lubricant effect may be reduced because of a high molecular weight because of being less likely to come out from the surface.

< other ingredients >

In the composition of the present invention, other additives may be blended in addition to the ethylene copolymer (a), the propylene polymer (B), the fatty acid amide (C) and the fatty acid amide (D) within a range not to impair the effects of the present invention. The additives are not particularly limited, and examples thereof include known additives used in the field of polyolefins such as softeners, fillers, acid acceptors, ultraviolet absorbers, antioxidants, heat stabilizers, light stabilizers, weather stabilizers, antistatic agents, and metal soaps.

The composition of the present invention preferably does not contain any crosslinked rubber from the viewpoint of exhibiting the mold releasability effect derived from the components (C) and (D).

The amount of additives other than the ethylene copolymer (a), the propylene polymer (B), the fatty acid amide (C) and the fatty acid amide (D) to be blended in the composition of the present invention is not particularly limited as long as the effects of the present invention are exhibited, and the total amount of the other additives is usually 5 parts by mass or less, preferably 0.5 to 3.0 parts by mass, based on 100 parts by mass of the total of the ethylene copolymer (a) and the propylene polymer (B).

< composition and molded article >

The composition of the present invention is obtained by mixing at least the ethylene copolymer (a), the propylene polymer (B), the fatty acid amide (C) and the fatty acid amide (D) at a predetermined mixing ratio by a melting method, a solution method or the like, preferably a melt-kneading method. As the melt kneading method, a melt kneading method generally used for thermoplastic resins can be applied. The composition of the present invention can be prepared, for example, as follows: the powdery or granular components are uniformly mixed together with other additives as needed by a henschel mixer, a ribbon blender, a V-blender, or the like, and then kneaded by a single-screw or multi-screw kneading extruder, a kneading roll, a batch (batch) kneader, a banbury mixer, or the like. The melt kneading temperature (for example, the cylinder temperature in the case of an extruder) of each component is preferably 160 to 260 ℃ and more preferably 180 to 230 ℃. The order of kneading the components and the kneading method are not particularly limited.

The molded article of the present invention is obtained by molding the composition of the present invention. The composition of the present invention can be molded into various molded articles by known molding methods such as injection molding, extrusion molding, inflation molding, blow molding, extrusion blow molding, injection blow molding, press molding, vacuum molding, calender molding, foam molding, and the like.

Among the above molding methods, injection molding is particularly preferable, and in this case, the molding temperature is preferably 170 to 260 ℃, and more preferably 180 to 250 ℃ from the viewpoints of fluidity, mold transferability, and oxidative deterioration of resin components.

The molded article of the present invention can be suitably used as automobile parts such as automobile skin materials and automobile airbag cover materials.

The present specification includes the contents described in the specification of japanese patent application 2019-056712, which is the basis of the priority of the present application.

Examples

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto.

The following examples and comparative examples were measured for physical properties as follows.

[ Melt Flow Rate (MFR) ]

The measurement was carried out in accordance with ISO1133 at 230 ℃ or 190 ℃ under a load of 2.16 kg.

[ melting Point (Tm) ]

The measurement was carried out by Differential Scanning Calorimetry (DSC). The measurement was performed as follows. About 5mg of the sample was placed in a dedicated aluminum pan, and the temperature was raised from 30 ℃ to 230 ℃ at 500 ℃/min by using a Diamond DSC manufactured by Perkin Elmer Co., Ltd., and after 10 minutes of holding at 230 ℃, the temperature was lowered from 230 ℃ to 30 ℃ at 10 ℃/min, and further held at 30 ℃ for 1 minute, and then the melting point was determined from the endothermic curve at 10 ℃/min of the temperature rise. In addition, in the case where a plurality of peaks are detected in the DSC measurement, the peak temperature detected on the highest temperature side is defined as the melting point (Tm).

[ Density ]

The density was calculated from the weight of each sample measured in water and air in accordance with ISO1183 (displacement in water method).

[ mold release pressure ]

When molding is performed by an injection molding machine described later, the pressure at the time of mold release when a 140 (width) × 140 (length) × 2 (thickness) (mm) box-shaped molded article is ejected from the mold (project) is measured by a pressure sensor provided in the ejector pin (project pin).

Example 1 and comparative examples 1 to 3

[ materials used ]

(1) Ethylene copolymer (A)

As the ethylene copolymer (A), a commercially available granular ethylene-1-butene copolymer (EBR-1) (granular, having an average particle diameter of 10mm) having the following physical properties was used.

The ethylene-derived constituent unit/(the ethylene-derived constituent unit + the 1-butene-derived constituent unit) was 80 mol%

MFR (ISO1133, 230 ℃, 2.16kg load): 0.9g/10 min

MFR (ISO1133, 190 ℃, 2.16kg load): 0.5g/10 min

Melting point (Tm): was not observed (measurement temperature: 30 to 230 ℃ C.)

Density: 861kg/m³

(2) Propylene polymer (B)

As the propylene polymer (B), a commercially available particulate propylene-ethylene block copolymer (PP-1) (particulate, having an average particle diameter of 10mm) having the following physical properties was used.

Propylene content 95 mol%

MFR (ISO1133, 230 ℃, 2.16kg load): 50g/10 min

Melting point (Tm): 164 deg.C

Density: 900kg/m³

Tensile modulus of elasticity (ISO527)1450MPa

Charpy impact strength (ISO179, 23 ℃)10kJ/m²

Bending temperature under load (ISO75, 1.8MPa)55 deg.C

(3) Fatty acid amide (C)

Erucamide (manufactured by Nichikoku K.K.) (melting point (Tm): 79 to 84 ℃ C., molecular weight: 338) was used as the fatty acid amide (C).

(4) Fatty acid amide (D)

As the fatty acid amide (D), oleamide (manufactured by LION AKZO Co., Ltd.) (melting point (Tm): 74 to 76 ℃ C.; molecular weight: 282) was used.

(example 1)

46 parts by mass of an ethylene-1-butene copolymer (EBR-1) as an ethylene copolymer (A), 54 parts by mass of a propylene-ethylene block copolymer (PP-1) as a propylene polymer (B), 0.13 part by mass of erucamide as a fatty acid amide (C) and 0.12 part by mass of oleamide as a fatty acid amide (D) were sufficiently mixed by a Henschel mixer, and extrusion kneading was carried out under the following conditions.

< extruder >

Product number KTX-46, manufactured by Kobe Steel works Ltd

Barrel temperature: C1-C2120 ℃, C3-C4140 ℃, C5-C14200 ℃,

die temperature: 200 deg.C

Screw rotation speed: 400rpm

Extrusion amount: 80kg/h

Using the obtained polymer composition, an injection molded article (test piece) was produced by the following injection molding machine, and the mold release pressure was measured. The results are shown in table 1.

< injection molding machine >

Product No. NEX140 (manufactured by Rispertia resin industries Co., Ltd.)

Barrel temperature (injection molding temperature): 220 deg.C

Temperature of the die: 40 deg.C

Comparative examples 1 to 3

The same procedure as in example 1 was repeated except that the blending amounts of the component (C) and the component (D) were changed as shown in table 1. The results are shown in table 1.

[ Table 1]

Raw material mixing ratio	Unit of	Comparative example 1	Comparative example 2	Comparative example 3	Example 1
						Component (A) EBR-1	Mass portion of	46	46	46	46
Component (B) PP-1	Mass portion of	54	54	54	54
						Fatty acid amide (C) as component (C)	Mass portion of		0.25	0.35	0.13
Component (D) a fatty acid amide (D)	Mass portion of	0.25			0.12
						Pressure of demoulding	MPa	8	9	4	1

As is clear from table 1, according to the present invention, an olefin polymer composition having excellent mold release properties with a small amount of lubricant added can be provided.

All publications, patents and patent applications cited in this specification are herein incorporated in their entirety by reference into the specification.