JP2017149912A - Propylene-based resin composition for electronic apparatus components transportation member and molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a propylene-based resin composition for electronic apparatus components transportation member and a molded article, which are very small in a volatile component content, do not generate performance degradation when transporting electronic apparatus components, have excellent dust resistance and transparency, and have high productivity.SOLUTION: A propylene-based resin composition for electronic apparatus component transportation member that contains 5 to 30 parts by weight of a polymer type antistatic agent to 100 parts by weight of a propylene-based polymer composition (c) made of 50 to 98 parts by weight of a propylene-based (co) polymer (a) that satisfies (H-i) to (H-ii) and 2 to 50 parts by weight of a propylene-based polymer composition (b) satisfying (A-i) to (A-iii). (H-i) a propylene-based copolymer having a content of a propylene homopolymer or alpha-olefine, (H-ii) MFR is 2 to 100 g/10 minutes, (A-i) metallocene-based propylene-alpha-olefin random copolymer, (A-ii) a content of alpha-olefin is 3 to 17% by weight, and (A-iii) MFR is 0.5 to 80 g/10 minutes.SELECTED DRAWING: None

Description

  The present invention relates to a propylene-based resin composition for an electronic device component conveying member and a molded product thereof. More specifically, the present invention is excellent in cleanliness without causing performance deterioration during conveyance, and also in the dustproof and transparent properties of the molded product. The present invention relates to a propylene-based resin composition for an electronic device component conveying member that gives an excellent molded product for electronic device component conveyance.

Propylene-based resins are widely used in various applications such as various industrial materials, various containers, daily necessities, films, and fibers because of their excellent heat resistance, moldability, transparency, and chemical resistance.
Various components such as silicon wafers, hard disks, disk substrates, IC chips, optical storage disks, high-performance substrate glass for LCDs, LCD color filters, hard disk magnetic head elements, reticles, CCD elements, etc. are used in electronic devices. . In assembling electronic equipment, these parts need to be transported, transported, and stored in order to be used in an assembly line, and a transport case for this purpose is used. Conventionally, transport cases for thermoplastic resins such as polypropylene have been used for this purpose.

In recent years, as electronic device parts have become smaller, higher performance, and higher capacity, contaminants that are generated and contacted during manufacturing, storage, and transportation have a major impact on the yield, quality, and reliability of electronic products. Has come to exert. Volatile components derived from low molecular weight components and residual substances contained in the resin not only cause generation of smoke and off-flavors during processing, but may also have an adverse effect on odor and hue even after processing. As miniaturization, higher density, and higher integration of electronic device parts progress, more sophisticated clean spaces are required.
Further, as electronic component parts are miniaturized, adhesion of fine dust has become a problem. Although the adhesion of dust can be improved by adding an antistatic agent to the resin, the addition of the antistatic agent has not been realized due to the generation of volatile components derived from the antistatic agent and surface contamination. It was.

As the antistatic agent, carbon black which is a conductive agent, and low molecular weight type antistatic agents such as glyceryl monostearate, alcohol and alkylamine which are surfactants are known. However, trays using such low molecular weight type antistatic agents exhibit antistatic performance when the antistatic agent bleeds, so that the electronic components are contaminated by the bleed antistatic agent, There was a problem that the prevention performance could not be maintained for a long time.
Furthermore, there is a demand for transparency so that the inside can be confirmed when transporting electronic device components. For example, it is required to arrive at a level at which a bar code in the transfer case can be scanned, and it is required that the alignment state of the wafers inside the substrate storage container can be visually confirmed (see, for example, Patent Document 1). ). In addition, a material that achieves both transparency and antistatic properties can be used for a member of a reticle case (see, for example, Patent Document 2).

  And the problem that the frequency with which the malfunction in performance generate | occur | produces in the said components accommodated in the conveyance case has arisen. For example, there are problems such as malfunction of the storage disk caused by organic substances or acid gas adhering to the storage disk (see Non-Patent Document 1, for example). By suppressing the generation of organic pollutant gases and moisture generated from the resin material of the transport case, it is expected to prevent deterioration in product yield, storage and movement, and improve reliability.

  In order to solve such problems related to polypropylene resins, a method of washing and removing low molecular weight components after polymerization (for example, see Patent Documents 3 and 4), and a method of separating and removing a liquid phase portion after bulk polymerization. (For example, refer to Patent Documents 5 and 6). Regardless of which method is used, the amount of oligomer components in the obtained resin and the amount of volatile components derived therefrom are not sufficient levels, and the appearance of a propylene resin having excellent quality has been desired.

JP 2014-110350 A JP 2007-329439 A Japanese Examined Patent Publication No. 53-4107 Japanese Patent Publication No.58-41283 Japanese Patent Laid-Open No. 10-17612 Japanese Patent Laid-Open No. 10-17613

Ultra-clean technology Toray Research Center (July 2005)

  The object of the present invention is that in the state of the prior art, the content of volatile components is extremely low, performance does not deteriorate during the transportation of electronic equipment parts, etc., and is excellent in dust resistance and transparency, and high in productivity. It is to provide a propylene-based resin composition for an electronic device component conveying member and a molded product, and particularly to provide a molded product for electronic device component conveying.

The present inventors have intensively studied, and by containing a specific antistatic agent in a specific ratio in a specific polypropylene resin mixture, a molded product for transportation using this has a volatile component content. It was found to be extremely small relative to the amount predicted from the material composition to be produced, and not to deteriorate the performance during the transportation of electronic equipment parts, and to be excellent in dust resistance and transparency, thereby completing the present invention.
That is, the present invention provides the following propylene-based resin composition and molded product for electronic device component conveying members, and particularly for propylene-based resin composition for electronic device component conveying members and molded products for conveying electronic device components. A molded product and a semiconductor-related component carrying case are provided.

[1] 50 to 98 parts by weight of a propylene-based (co) polymer (a) satisfying the following conditions (Hi) to (H-ii) and the following conditions (Ai) to (A-iii) are satisfied. 5 to 30 parts by weight of a polymer-type antistatic agent is contained with respect to 100 parts by weight of a propylene-based polymer composition (c) comprising 2 to 50 parts by weight of a propylene-based copolymer (b). Propylene-based resin composition for electronic device component conveying members.
(Hi) A propylene homopolymer or a propylene copolymer comprising propylene and an α-olefin having a content of less than 1% by weight.
(H-ii) The melt flow rate (hereinafter sometimes abbreviated as MFR) based on JIS K7210 (230 ° C., 2.16 kg load) is in the range of 2 to 100 g / 10 minutes.
(Ai) A metallocene propylene-α-olefin random copolymer.
(A-ii) The α-olefin content is in the range of 3 to 17% by weight.
(A-iii) MFR is in the range of 0.5 to 80 g / 10 min.
[2] 30 to 70% by weight of propylene-ethylene random copolymer (α) satisfying the following conditions (Bi) to (B-ii) and the following condition (Ci 2) propylene-α-olefin random copolymer (β) satisfying (C-iii) 30 to 70% by weight object.
(Bi) A metallocene propylene-ethylene random copolymer.
(B-ii) The ethylene content is in the range of 7 to 25% by weight.
(Ci) a metallocene propylene-α-olefin random copolymer.
(C-ii) The melting peak temperature (Tm) is in the range of 125 to 145 ° C.
(C-iii) The α-olefin content is in the range of 1 to 5% by weight.
[3] The propylene-based resin composition for electronic device component conveying members according to [1] or [2], wherein a flexural modulus measured according to JIS K7171 is 650 to 2200 MPa.
[4] The propylene-based resin composition for electronic device component conveying members according to any one of [1] to [3], wherein the volatile component content is 20 ppm by weight or less.
[5] A molded article for transporting electronic device parts obtained using the propylene-based resin composition for electronic device parts transporting member according to any one of [1] to [4].
[6] A semiconductor-related component transport case obtained using the propylene-based resin composition for an electronic device component transport member according to any one of [1] to [4].

  Molded products manufactured using the propylene-based resin composition for electronic device component conveying members of the present invention, in particular, molded products for conveying electronic device components have a volatile component content as compared with conventional conveying cases. Therefore, it is extremely small compared to the amount predicted from the above, and it is useful for satisfying the performance that is excellent in dustproofness and transparency without causing the performance degradation when transporting the electronic device parts. In particular, it is very useful as a semiconductor-related component transfer case.

FIG. 1 is a diagram showing the elution amount and elution amount integration by TREF. FIG. 2 is a graph showing the relationship between the content of the propylene-based copolymer (b) and haze. FIG. 3 is an IR chart of a trade name “Peletron UC” manufactured by Sanyo Chemical Industries, which is a polymer type antistatic agent.

The propylene-based resin composition for an electronic device component conveying member of the present invention comprises 50 to 98 parts by weight of a specific propylene-based (co) polymer (a) and 2 to 50 parts by weight of a propylene-based copolymer (b). The polymer type antistatic agent is contained in an amount of 5 to 30 parts by weight per 100 parts by weight of the propylene polymer composition (c), the volatile component content is small, and the dust resistance and transparency are excellent. And
Hereinafter, the propylene-based resin composition for an electronic device component conveying member and the molded product of the present invention will be described in detail.

[1] Component constituting propylene resin composition (1) Propylene (co) polymer (a)

(I) α-olefin of propylene-based (co) polymer (a) The propylene-based (co) polymer (a) used in the propylene-based resin composition for an electronic device component conveying member of the present invention is preferably propylene alone. A polymer, propylene, and a propylene copolymer composed of an α-olefin having a content of less than 1% by weight or a mixture thereof.
The propylene-based (co) polymer (a) is preferably a homopolymer from the viewpoint of rigidity, and is preferably a random copolymer composed of propylene and an α-olefin from the viewpoint of transparency. Examples of the α-olefin used for the copolymerization include α-olefins having 2 to 20 carbon atoms excluding propylene, and examples thereof include ethylene, butene-1, hexene-1, and octene-1. One or more α-olefins copolymerized with propylene may be used. Of these, ethylene and butene-1 are preferred. More preferably, ethylene is suitable. These propylene polymers may be used as a mixture of two or more. Moreover, it is preferable from a rigid viewpoint that content of an alpha olefin is less than 1 weight%.

  Specific examples of the propylene-based copolymer include propylene-ethylene copolymer, propylene-butene-1 copolymer, propylene-hexene-1 copolymer, propylene-octene-1 copolymer, propylene-ethylene. A binary combination of any amount of comonomers, such as a -butene-1 copolymer, a propylene-ethylene-hexene-1 copolymer, a propylene-butene-1-octene-1 copolymer, or the like A terpolymer can be exemplified.

The α-olefin content used in the propylene-based (co) polymer (a) is preferably less than 1% by weight, and more preferably less than 0.5% by weight. When the α-olefin content is less than 1% by weight, the rigidity is improved and there is no risk of deformation when the containers are stacked.
Here, the content of propylene and α-olefin is a value measured by a ¹³ C-NMR method under the following conditions.
Apparatus: JEOL-GSX270 manufactured by JEOL Ltd.
Concentration: 300 mg / 2 mL
Solvent: Orthodichlorobenzene

(Ii) Melt flow rate (MFR) of propylene-based (co) polymer (a)
The propylene-based (co) polymer (a) used in the present invention has a melt flow rate (MFR) in the range of 2 to 100 g / 10 min in accordance with JIS K7210 (230 ° C., 2.16 kg load). 5 to 60 g / 10 min is preferable, and 10 to 40 g / 10 min is more preferable. When the melt flow rate (MFR) is 2 g / 10 min or more, the molding processability is improved and a satisfactory product is obtained. Further, when it is 100 g / 10 min or less, the mechanical strength is improved.
The melt flow rate (MFR) is controlled by controlling the amount of hydrogen added in the method of adjusting the temperature and pressure, which are the polymerization conditions of the propylene-based (co) polymer (a), or adding a chain transfer agent such as hydrogen during the polymerization. Adjustment can be made easily.

(Iii) Stereoregularity of propylene-based (co) polymer (a) When the propylene-based (co) polymer (a) used in the present invention is a propylene homopolymer, the isotactic pentad fraction is 0. .90 or more is preferable, and 0.94 to 0.98 is more preferable. If the isotactic pentad fraction is 0.90 or more, the rigidity is satisfactory.
Here, the isotactic pentad fraction is a value measured by a proton decoupling method using ¹³ C-NMR.

(Iv) Catalyst of propylene-based (co) polymer (a) The propylene-based (co) polymer (a) used in the present invention is not particularly limited as a catalyst to be used, but it is preferable to use a stereoregular catalyst. preferable. Examples of stereoregular catalysts include Ziegler catalysts and metallocene catalysts. Preferably, a metallocene catalyst that can be expected to have low volatility is more preferable.

  Ziegler catalysts include titanium halide compounds such as titanium trichloride, titanium tetrachloride, and trichloroethoxytitanium, transition metal components such as contacts between the titanium halide compounds and magnesium compounds typified by magnesium halide, and alkylaluminum. Compounds or their two-component catalysts with organic metal components such as halides, hydrides, alkoxides, and further, electron-donating compounds containing nitrogen, carbon, phosphorus, sulfur, oxygen, silicon, etc. are added to these components 3 Component-based catalysts can be mentioned.

The metallocene catalyst is preferably a supported type.
A particularly preferred example of the supported metallocene catalyst is an ion-exchange layered silicate in which the carrier also functions as a promoter. Specifically, it is obtained by combining the component [A], the component [B] described below and the component [C] added as necessary.

Component [A] Metallocene complex Group 4-6 transition metal compound having at least one conjugated five-membered ring ligand
・ Component [B] Cocatalyst Ion exchange layered silicate
・ Component [C] Organoaluminum compound

-Component [A] Metallocene complex As said component [A], specifically, the compound represented by the following formula [I] can be used.
^{_{Q (C 5 H 4-a}} R 1 a) (C 5 H 4-b R 2 b) MXY ··· [I]
In the formula [I], Q represents a binding group that bridges two conjugated five-membered ring ligands.
M represents a group 4-6 transition metal in the periodic table, and titanium, zirconium, and hafnium are particularly preferable.
X and Y are each independently hydrogen, halogen, a hydrocarbon group having 1 to 20 carbon atoms, an oxygen-containing hydrocarbon group having 1 to 20 carbon atoms, a nitrogen-containing hydrocarbon group having 1 to 20 carbon atoms, or a carbon number. A phosphorus-containing hydrocarbon group having 1 to 20 carbon atoms or a silicon-containing hydrocarbon group having 1 to 20 carbon atoms is shown.

R ¹ and R ² are each independently a hydrocarbon group having 1 to 20 carbon atoms, halogen, a halogen-containing hydrocarbon group having 1 to 20 carbon atoms, an alkoxy group, an aryloxy group, a silicon-containing hydrocarbon group, phosphorus A hydrocarbon-containing group, a nitrogen-containing hydrocarbon group or a boron-containing hydrocarbon group; Two adjacent R ¹ or two R ² may be bonded to each other to form a C _{4 to} C ₁₀ ring. In particular, it is preferable to form a 6-membered ring or a 7-membered ring and to form an indene ring or an azulene ring together with the conjugated 5-membered ring.
a and b are integers satisfying 0 ≦ a ≦ 4 and 0 ≦ b ≦ 4.
Examples of the binding group Q that bridges between two conjugated five-membered ring ligands include an alkylene group, an alkylidene group, a silylene group, and a germylene group. These may be those in which a hydrogen atom is substituted with an alkyl group, halogen or the like. In particular, a silylene group is preferable.

Specific examples of the metallocene complex include the following compounds.
(1) Methylenebis (cyclopentadienyl) zirconium dichloride
(2) Methylene (cyclopentadienyl) (3,4-dimethylcyclopentadienyl) zirconium dichloride
(3) Isopropylidene (cyclopentadienyl) (3,4-dimethylcyclopentadienyl) zirconium dichloride
(4) Ethylene (cyclopentadienyl) (3,5-dimethylpentadienyl) zirconium dichloride
(5) Methylenebis (indenyl) zirconium dichloride
(6) Ethylenebis (2-methylindenyl) zirconium dichloride
(7) Ethylene 1,2-bis (4-phenylindenyl) zirconium dichloride
(8) Ethylene (cyclopentadienyl) (fluorenyl) zirconium dichloride

(9) Dimethylsilylene (cyclopentadienyl) (tetramethylcyclopentadienyl) zirconium dichloride
(10) Dimethylsilylenebis (indenyl) zirconium dichloride
(11) Dimethylsilylenebis (4,5,6,7-tetrahydroindenyl) zirconium dichloride
(12) Dimethylsilylene (cyclopentadienyl) (fluorenyl) zirconium dichloride
(13) Dimethylsilylene (cyclopentadienyl) (octahydrofluorenyl) zirconium dichloride
(14) Methylphenylsilylenebis [1- (2-methyl-4,5-benzo (indenyl)] zirconium dichloride
(15) Dimethylsilylenebis [1- (2-methyl-4,5-benzoindenyl)] zirconium dichloride
(16) Dimethylsilylenebis [1- (2-methyl-4H-azurenyl)] zirconium dichloride
(17) Dimethylsilylenebis [1- (2-methyl-4- (4-chlorophenyl) -4H-azurenyl)] zirconium dichloride
(18) Dimethylsilylenebis [1- (2-ethyl-4- (4-chlorophenyl) -4H-azurenyl)] zirconium dichloride
(19) Dimethylsilylenebis [1- (2-ethyl-4-naphthyl-4H-azurenyl)] zirconium dichloride

(20) Diphenylsilylenebis [1- (2-methyl-4- (4-chlorophenyl) -4H-azurenyl)] zirconium dichloride
(21) Dimethylsilylenebis [1- (2-methyl-4- (phenylindenyl))] zirconium dichloride
(22) Dimethylsilylenebis [1- (2-ethyl-4- (phenylindenyl))] zirconium dichloride
(23) Dimethylsilylenebis [1- (2-ethyl-4-naphthyl-4H-azurenyl)] zirconium dichloride
(24) Dimethylgermylenebis (indenyl) zirconium dichloride
(25) Dimethylgermylene (cyclopentadienyl) (fluorenyl) zirconium dichloride In addition, the same compounds as described above can be preferably used for other Group 4, 5, and 6 transition metal compounds such as a titanium compound and a hafnium compound. About the catalyst component and catalyst of this invention, you may use these compounds together.

Component [B] cocatalyst (ion-exchange layered silicate)
The ion-exchange layered silicate is not limited to a natural product, and may be an artificial synthetic product. A clay compound can be used as the ion-exchange layered silicate. Specific examples of the clay compound include, for example, the following described in Harakuo Shiramizu “Clay Mineralogy” Asakura Shoten (1995): Examples include layered silicates.
(A) Kaolins such as dickite, nacrite, kaolinite, anorokite, metahalloysite, halloysite, etc., and serpentine groups such as chrysotile, lizardite, antigolite, etc., whose 1: 1 type structure is the main constituent layer
(B) Montmorillonite, sauconite, beidellite, nontronite, saponite, hectorite, stevensite and other smectites, vermiculite such as vermiculite, mica, illite, sericite, Mica, such as sea green stone, attapulgite, sepiolite, palygorskite, bentonite, pyrophyllite, talc, chlorite group

The silicate used in the present invention may be a layered silicate in which the mixed layers (a) and (b) are formed.
In the present invention, the main component silicate is preferably a silicate having a 2: 1 type structure, more preferably a smectite group, and particularly preferably montmorillonite.

The activity can be improved by chemically treating these silicates with an acid, salt, alkali, oxidizing agent, reducing agent, organic solvent or the like.
In addition to removing impurities on the surface of the ion-exchange layered silicate particles or exchanging interlayer cations, the acid treatment may elute some or all of the cations such as Al, Fe, and Mg in the crystal structure. it can.
Examples of the acid used in the acid treatment include hydrochloric acid, nitric acid, sulfuric acid and the like, preferably an inorganic acid, particularly preferably sulfuric acid.
There are no particular limitations on the acid treatment conditions, but preferably the conditions are such that an aqueous solution of 5 to 50% by weight acid is reacted at a temperature of 60 to 100 ° C. for 1 to 24 hours, and the acid concentration is changed during the reaction. May be. After the acid treatment, washing is usually performed. Washing is an operation for separating and removing the acid contained in the treatment system from the ion-exchangeable layered silicate.

As the salt used in the salt treatment, it is preferable to select and use a salt containing a specific cation. As for the kind of the cation, a monovalent to tetravalent metal cation is preferable, and a cation of Li, Ni, Zn, or Hf is particularly preferable.
Specific examples of the salts include the following.
Examples of the cation with Li include LiCl, LiBr, Li ₂ SO ₄ , Li ₃ (PO ₄ ), Li (ClO ₄ ), Li ₂ (C ₂ O ₄ ), LiNO ₃ , Li (OOCCH ₃ ), Li ₂ (C ₄ H ₄ O ₄ ) and the like.
Examples of the cation that is Ni include NiCO ₃ , Ni (NO ₃ ) ₂ , NiC ₂ O ₄ , Ni (ClO ₄ ) ₂ , NiSO ₄ , NiCl ₂ , and NiBr ₂ .
Examples of the cation with Zn include Zn (OOCH ₃ ) ₂ , Zn (CH ₃ COCHCOCH ₃ ) ₂ , ZnCO ₃ , Zn (NO ₃ ) ₂ , Zn (ClO ₄ ) ₂ , Zn ₃ (PO ₄ ) ₂ , ZnSO ₄ , ZnF ₂ , ZnCl ₂ , ZnBr ₂ , ZnI _{2 and the} like can be mentioned.
As those cations of _{Hf, Hf (OOCCH 3) 4} , Hf (CO 3) 2, Hf (NO 3) 4, Hf (SO 4) 2, HfOCl 2, HfF 4, HfCl 4, HfBr 4, HfI ₄ etc. can be mentioned.

  After the chemical treatment, drying is performed. In general, the drying temperature can be 100 to 800 ° C., and high temperature conditions (for example, 800 ° C. or more depending on the heating time) that cause structural destruction are as follows. It is not preferable. Since the characteristics change depending on the drying temperature even if the structure is not destroyed, it is preferable to change the drying temperature according to the application. The drying time is usually 1 minute to 24 hours, preferably 5 minutes to 4 hours, and the atmosphere is dry air, dry nitrogen, dry argon, or reduced pressure. It does not specifically limit regarding a drying method, It can implement by various methods.

Component [C] Organoaluminum Compound The organoaluminum compound of component [C] is a component that is optionally used as necessary, and a compound represented by the following formula [II] is optimal.
(AlR ⁴ _p X _3-p ) _q ... [II]
In formula [II], R ⁴ represents a hydrocarbon group having 1 to 20 carbon atoms, and X represents a halogen, hydrogen, an alkoxy group, or an amino group. p is an integer of 1 to 3, and q is an integer of 1 to 2.
R ⁴ is preferably an alkyl group, and X is preferably an alkoxy group having 1 to 8 carbon atoms when it is an alkoxy group, and an amino group having 1 to 8 carbon atoms when it is an amino group.
Of these, trialkylaluminum and dialkylaluminum hydride having p = 3 and q = 1 are preferable. More preferably, R ⁴ is a trialkylaluminum having 1 to 8 carbon atoms.

  An organoaluminum compound can be used individually or in mixture of multiple types or in combination. The organoaluminum compound can be added and used not only at the time of catalyst preparation but also at the time of preliminary polymerization or main polymerization.

(V) Production method of propylene-based (co) polymer (a) The production method of propylene-based (co) polymer (a) is a slurry polymerization method using an inert solvent in the presence of the catalyst, and a solution. Examples thereof include a polymerization method, a gas phase polymerization method using substantially no solvent, or a bulk polymerization method using a polymerization monomer as a solvent.
For example, in the case of the slurry polymerization method, it can be carried out in an inert hydrocarbon or liquid monomer such as n-butane, isobutane, n-pentane, isopentane, hexane, heptane, octane, cyclohexane, benzene, toluene, xylene and the like. . The polymerization temperature is usually −80 to 150 ° C., preferably 40 to 120 ° C. The polymerization pressure is preferably 1 to 60 atmospheres, and the molecular weight of the resulting propylene-based (co) polymer (a) can be adjusted with hydrogen or other known molecular weight regulators. The polymerization is carried out by a continuous or batch reaction, and the conditions may be those usually used. Furthermore, the polymerization reaction may be performed in one stage or in multiple stages.
When a metallocene catalyst is used, it is desirable to perform a prepolymerization treatment before the main polymerization is performed. As monomers used for the prepolymerization, α-olefins such as ethylene, propylene, 1-butene and 1-hexene, diene compounds such as 1,3-butadiene, and vinyl compounds such as styrene and divinylbenzene can be used. .
This prepolymerization is preferably carried out under mild conditions in an inert solvent, and is 0.01 to 1,000 g, preferably 0.1 g, per gram of the solid catalyst (total of component [A] and component [B]). It is desirable to carry out such that ~ 100 g of polymer is produced.

  The polymerization reaction is performed in the presence or absence of an inert hydrocarbon such as butane, pentane, hexane, heptane, toluene, cyclohexane, or a solvent such as a liquefied α-olefin. In the present invention, it is desirable to increase the amount of polymer produced per solid catalyst (when the solid catalyst is prepolymerized, the polymer produced by the prepolymerization is not included). In order to increase the polymer production amount, it is desirable to set both the polymerization temperature and the polymerization pressure higher.

Usually, the polymerization temperature is selected from 60 to 90 ° C., and the polymerization pressure is selected from about 1.5 to 4 MPa. In particular, in the case of the bulk polymerization method, the polymerization temperature is preferably 60 to 80 ° C., and the polymerization pressure is preferably selected from about 2.5 to 4 MPa in correlation with the temperature. On the other hand, in the case of the gas phase polymerization method, the polymerization temperature is 70 to 90 ° C., and is preferably selected from about 1.5 to 4 MPa.
Furthermore, it is possible to increase the polymer production amount per solid catalyst by increasing the residence time of the solid catalyst, but if it is too long, the productivity will be affected. The preferred residence time is 1 to 8 hours, more preferably 1 to 6 hours. It is desirable to set the polymerization conditions so that the polymer production amount per 1 g of the solid catalyst including the carrier is 20 kg or more, preferably 25 kg or more, more preferably 30 kg or more.
Further, hydrogen may be present as a molecular weight regulator in the polymerization system. Furthermore, the polymerization may be carried out in multiple stages by changing the polymerization temperature, the concentration of the molecular weight regulator and the like.

In the present invention, after the polymerization is completed, the obtained propylene-based (co) polymer (a) is used with an inert saturated hydrocarbon solvent such as propane, butane, pentane, hexane, heptane, or liquid α-olefin. More preferably, washing is performed using an inert hydrocarbon solvent having 3 or 4 carbon atoms or a liquid α-olefin.
The washing method is not particularly limited, and a known method such as decantation of the supernatant after the contact treatment in the stirring tank, countercurrent washing, and separation from the washing solution by a cyclone can be used.
Moreover, you may add a quenching agent before washing | cleaning or simultaneously with washing | cleaning. The quenching agent is not particularly limited, and water, alcohols such as methanol, ethanol, and isopropanol, ketones such as acetone and methyl ethyl ketone, or a mixture thereof can be used.

(Vi) Molecular weight distribution (Mw / Mn) and weight average molecular weight (Mw) of the propylene-based (co) polymer (a)
The molecular weight distribution [weight average molecular weight (Mw) / number average molecular weight (Mn)] obtained by gel permeation chromatography (GPC) measurement of the propylene-based (co) polymer (a) used in the present invention is 1.5-4. 0.0 is preferred.
The lower limit of the molecular weight distribution is preferably 2.0 or more, more preferably 2.5 or more, and the upper limit is preferably 3.8 or less, more preferably 3.5 or less.
When the lower limit of the molecular weight distribution is a certain value or more, the range of conditions for production and purification of the propylene-based (co) polymer (a) is widened, which is preferable because production efficiency is improved. In addition, if the upper limit is below a certain level, it indicates that the length of the molecular chain is very uniform, causing unreacted monomers, dimers, low molecular weight compounds, amorphous components that are thought to cause the generation of volatile components This is preferable because the content of relatively low molecular weight components such as oligomers is reduced.

  The weight average molecular weight (Mw) of the propylene-based (co) polymer (a) used in the present invention is preferably in the range of 100,000 to 600,000. Molding becomes easy when the weight average molecular weight Mw is 600,000 or less. On the other hand, when the weight average molecular weight Mw is 100,000 or more, the low crystal component is decreased, and the mold resistance, bleed out, solvent elution and the like are suppressed, and the impact resistance of the molded product is improved.

(Vii) Average elution temperature (T50) and elution dispersity (σ) of the propylene-based (co) polymer (a)
When a metallocene catalyst is used, the average elution temperature (T50) of the propylene-based (co) polymer (a) used in the present invention is preferably 90 to 105 ° C, and the elution dispersity (σ) is preferably 9 ° C or less.
Here, the average elution temperature is a value based on the elution curve of the polymer by the temperature rising elution fractionation method using o-dichlorobenzene as a solvent, and represents the temperature when the integrated mass of the eluted polymer is 50% by mass. . The elution dispersity is defined as the mass integrated elution amount I (t) is expressed by the following formula (1), assuming that the elution amount by the temperature rising elution fractionation method follows a normal probability distribution with respect to the elution temperature. Is the value of σ.

Specifically, the elution dispersion is σ = T50−T15.9. T15.9 indicates the temperature at which the accumulated mass is 15.9 mass%.
When the average elution temperature is 90 to 105 ° C., when the molded product is a molded product for conveying electronic device parts, the molecular weight and melting point of the propylene-based (co) polymer (a) are appropriate for molding. Dimensional accuracy can be improved. When the average elution temperature is 90 ° C. or higher, the molecular weight and melting point of the propylene-based (co) polymer (a) will not be too low, and the dimensional accuracy of the molded article for transporting electronic device parts will be good. It is preferable that the molecular weight and melting point of the propylene resin do not become too high.
Moreover, when the elution dispersion degree (σ) is 9 ° C. or less, elution of components accompanying a temperature rise can be suppressed and dimensional accuracy can be improved. The elution dispersity (σ) is more preferably 7 ° C. or less, and further preferably 6 ° C. or less.
As such a propylene-based (co) polymer (a), a commercially available product can be used, and examples thereof include trade name: WINTEC manufactured by Nippon Polypro Co., Ltd.

(2) Propylene copolymer (b)
(I) Catalyst of propylene-based copolymer (b) The propylene-based copolymer (b) is not particularly limited as long as it is manufactured using a metallocene catalyst as a polymerization catalyst. Any method for producing the copolymer may be used. The metallocene catalyst is the same as that mentioned above. When the propylene copolymer (b) is a catalyst other than a metallocene catalyst, for example, a Ziegler catalyst, the resulting propylene copolymer is very sticky and has poor moldability, and there is a concern about bleeding as a product.

(Ii) α-olefin of propylene-based copolymer (b) When the α-olefin content of the propylene-based copolymer (b) used in the present invention is 3% by weight or more, the impact resistance becomes sufficient. When the content is less than or equal to% by weight, phase separation hardly occurs and transparency is improved. Examples of the α-olefin used for the copolymerization include α-olefins having 2 to 20 carbon atoms excluding propylene, and examples thereof include ethylene, butene-1, hexene-1, and octene-1. One or more α-olefins copolymerized with propylene may be used. Of these, ethylene and butene-1 are preferred. More preferably, ethylene is suitable. These propylene copolymers may be used as a mixture of two or more.
Specific examples of the propylene-based copolymer include propylene-ethylene copolymer, propylene-butene-1 copolymer, propylene-hexene-1 copolymer, propylene-octene-1 copolymer, propylene-ethylene. A binary or ternary combination of any amount of comonomers, such as -butene-1 copolymer, propylene-ethylene-hexene-1 copolymer, propylene-butene-1-octene-1 copolymer, etc. An original copolymer can be exemplified.
Such a propylene copolymer (b) satisfies the condition of being a metallocene propylene-α-olefin random copolymer. The metallocene-based propylene-α-olefin random copolymer is a propylene-α-olefin random copolymer obtained by polymerization using a metallocene catalyst.

The propylene-based copolymer (b) used in the present invention has a propylene-ethylene random copolymer (α) satisfying the following conditions (Bi) to (B-ii) of 30 to 70% by weight and the following conditions. It is preferably composed of 30 to 70% by weight of a propylene-α-olefin random copolymer (β) satisfying (Ci) to (C-iii).
(Bi) A metallocene propylene-ethylene random copolymer.
(B-ii) The ethylene content is in the range of 7 to 25% by weight.
(Ci) a metallocene propylene-α-olefin random copolymer.
(C-ii) The melting peak temperature (Tm) is in the range of 125 to 145 ° C.
(C-iii) The α-olefin content is in the range of 1 to 5% by weight.
The metallocene propylene-ethylene random copolymer is a propylene-ethylene random copolymer (α) obtained by polymerization using a metallocene catalyst. The metallocene-based propylene-α-olefin random copolymer is a propylene-α-olefin random copolymer (β) obtained by polymerization using a metallocene catalyst.

When the content of the propylene-ethylene random copolymer (α) constituting the propylene-based copolymer (b) used in the present invention is 30% by weight or more, the effect of improving transparency is sufficient, and the content is 70% by weight or less. If there is, the rigidity is sufficient. More preferably, it is 30-60 weight%, More preferably, it is 40-60 weight%.
When the ethylene content of the propylene-ethylene random copolymer (α) used in the present invention is 7% by weight or more, the transparency improving effect is sufficient, and when it is 25% by weight or less, phase separation hardly occurs. It becomes good. More preferably, it is 7-20 weight%, More preferably, it is 8-15 weight%.
As such a propylene-ethylene random copolymer (α), commercially available products can be used. For example, trade names manufactured by Dow: Versify and trade names manufactured by Exxon Mobil: Vistamax can be mentioned.

When the content of the propylene-α-olefin random copolymer (β) constituting the propylene-based copolymer (b) used in the present invention is 30% by weight or more, rigidity can be expected to be maintained, and 70% by weight or less. When it is, the transparency improvement effect by increase of ((alpha)) component is anticipated. More preferably, it is 40-70 weight%, More preferably, it is 40-60 weight%.
When the ethylene content of the propylene-α-olefin random copolymer (β) used in the present invention is 1% by weight or more, the effect of improving the transparency is sufficient, and when it is 5% by weight or less, the rigidity is sufficient. More preferably, it is 2-4 weight%, More preferably, it is 2-3 weight%.
Examples of the α-olefin used for copolymerization of the propylene-α-olefin random copolymer (β) include α-olefins having 2 to 20 carbon atoms excluding propylene, such as ethylene, butene-1, hexene-1, Examples include octene-1 and the like. One or more α-olefins copolymerized with propylene may be used. Of these, ethylene and butene-1 are preferred. More preferably, ethylene is suitable. These propylene polymers may be used as a mixture of two or more.
Specific examples of the propylene-α-olefin random copolymer (β) include propylene-ethylene copolymer, propylene-butene-1 copolymer, propylene-hexene-1 copolymer, and propylene-octene-1. A comonomer such as a copolymer, propylene-ethylene-butene-1 copolymer, propylene-ethylene-hexene-1 copolymer, propylene-butene-1-octene-1 copolymer, etc. A binary or ternary copolymer with some amount combined can be exemplified.

(Iii) MFR of propylene-based copolymer (b)
The melt flow rate (MFR: 230 ° C., 2.16 kg load) of the propylene-based copolymer (b) is in the range of 0.5 to 80 g / 10 minutes.
When the melt flow rate (MFR: 230 ° C., 2.16 kg load) of the propylene-based copolymer (b) used in the present invention is 0.5 g / 10 min or more, molding becomes easy, and at 80 g / 10 min or less. If it exists, the relatively low molecular weight component in the propylene-based copolymer (b) hardly bleeds on the surface of the molded product, and the appearance is improved.
Melt flow rate (MFR) is easily controlled by adjusting the temperature and pressure, which are the polymerization conditions for the propylene-based copolymer (b), and by controlling the amount of hydrogen added in the method of adding a chain transfer agent such as hydrogen during polymerization. Adjustments can be made.

(Iv) Tm of propylene-α-olefin random copolymer (β)
The melting peak temperature (Tm) of the propylene-α-olefin random copolymer (β) used in the present invention is preferably in the range of 125 to 145 ° C, and the melting peak temperature (Tm) is 125 ° C or higher. The rigidity and moldability are good, and if it is 145 ° C. or less, the effect of improving transparency is sufficient. More preferably, it is 125-140 degreeC, More preferably, it is 130-140 degreeC.
The specific measurement of the melting peak temperature (Tm) was performed by using a differential scanning calorimeter (DSC), taking a sample amount of 5 mg, holding at 200 ° C. for 5 minutes, and then crystallizing to 40 ° C. at a rate of temperature decrease of 10 ° C./min. Further, the peak position of the curve drawn when melted at a heating rate of 10 ° C./min is defined as a melting peak temperature Tm (° C.).

(V) Content of propylene-based copolymer (b) The propylene-based polymer composition (c) in the propylene-based resin composition for electronic device component transport members of the present invention is a propylene-based (co) polymer (a). It consists of 50 to 98 parts by weight and 2 to 50 parts by weight of the propylene-based copolymer (b). The propylene-based copolymer (b) is obtained by adding 2 to 50 parts by weight to 50 to 98 parts by weight of the propylene-based (co) polymer (a). However, the propylene-based polymer composition (c) to which the propylene-based (co) polymer (a) and the propylene-based copolymer (b) are added is 100 parts by weight.
When the content of the propylene-based copolymer (b) is 2 parts by weight or more, transparency is sufficient, and when it is 50 parts by weight or less, rigidity is improved, which is preferable.

(Vi) Production method of propylene copolymer (b) The production method of propylene copolymer (b) is not particularly limited as long as a metallocene catalyst is used, and usually a propylene copolymer is produced. Any method for doing so may be used. The metallocene catalyst is the same as that mentioned above.
As such a propylene-based copolymer (b), a commercially available product can be used. For example, trade name: VISTAMAX manufactured by Exxon Mobil Co., Ltd. or trade name: WELNEX manufactured by Nippon Polypro Co., Ltd. ) And the like.

(3) Polymer-type antistatic agent The polymer-type antistatic agent is an antistatic agent having two or more structural units, and preferably, for example, a polymer-type antistatic agent having a number average molecular weight of 1,000 or more. Any nonionic, cationic or anionic polymer type antistatic agent can be used.
Of these, nonionic ones are preferable, and polymer antistatic agents having a hydrophilic segment and having antistatic properties imparted by the hygroscopic property of the hydrophilic segment are particularly preferable.
As such a polymer type antistatic agent, a hydrophilic polymer / lipophilic polymer block copolymer such as a polyether / polyolefin block copolymer is preferably exemplified.
In the polyether / polyolefin block copolymer, the polyether block functions as a hydrophilic segment, and the polyolefin block functions as a lipophilic segment. That is, the hydrophilic segment has an effect of lowering the surface resistance of the molded body due to its hygroscopicity, and the lipophilic segment has an effect of enhancing the compatibility with the propylene-based resin as a base material, and thus is particularly excellent. Antistatic agent.

Examples of the polyether constituting the polyether / polyolefin block copolymer include polyether diol, polyether diamine, modified products thereof, and a polyether-containing hydrophilic polymer. The polyether-containing hydrophilic polymer includes a polyether ester amide having a polyether diol segment, a polyether amide imide having a polyether diol segment, a polyether ester having a polyether diol segment, and a polyether diamine segment. And polyether urethanes having polyether diol or polyether diamine segments.
Examples of the oxyalkylene group constituting the polyether include an ethylene group, a propylene group, a trimethylene group, and a tetramethylene group, which are oxyalkylene groups having 2 to 4 carbon atoms of alkylene. The proportion of the oxyethylene group in the oxyalkylene chain constituting the polyether is preferably 5% by mass or more, more preferably 10 to 100% by mass, and still more preferably 60 to 100% by mass from the viewpoint of improving the antistatic property. %. The number average molecular weight of the polyether is preferably 150 to 20,000.
The polyolefin constituting the polyether / polyolefin block copolymer is preferably a polyolefin obtained by polymerizing at least one selected from olefins having 2 to 30 carbon atoms, more preferably by polymerizing at least one of ethylene and propylene. The resulting polyolefin.

The polyether / polyolefin block copolymer includes a polyether (H) block which is a hydrophilic polymer and a polyolefin (L) block which is a lipophilic polymer as structural units. The weight ratio (H / L) of the block (H) and the block (L) constituting the polyether / polyolefin block copolymer is preferably 20/80 to 90 from the viewpoint of antistatic properties and water resistance. / 10, more preferably 25/75 to 80/20, still more preferably 30/70 to 70/30.
The structure in which the (H) block and the (L) block constituting the polyether / polyolefin block copolymer are bonded to each other includes (H)-(L) type, (H)-(L)-(H ) Type, (L)-(H)-(L) type and [(H)-(L)] _n type (n represents the average number of repetitions). The structure of the polyether / polyolefin block copolymer is preferably an [(H)-(L)] _n type in which (H) and (L) are repeatedly and alternately bonded from the viewpoint of antistatic properties. [(H)-(L)] _{n in the n-} type structure is preferably 2 to 50, more preferably 2.3 to 30, particularly preferably from the viewpoint of antistatic properties and mechanical properties of the molded product. 2.7 to 20, most preferably 3 to 10. This average repeating number n can be determined by the method described in JP-A-2005-97596, that is, the number average molecular weight Mn and ¹ H-NMR analysis of the polyether / polyolefin block copolymer.
The number average molecular weight Mn of the polyether / polyolefin block copolymer is preferably 2,000 to 60,000, more preferably 5,000 to 40,000, and still more preferably 8,000 to 30,000.

The polymer type antistatic agent to be used is preferably used in such a range that the volatile components from the polymer type antistatic agent and the elution amount of sodium and potassium ions are not problematic.
By using such a polymer type antistatic agent, the dispersibility with the propylene-based resin is improved, the moldability is excellent, and the antistatic property of the molded body is improved over a long period of time.
The number average molecular weight of the polymer type antistatic agent is preferably 1,000 to 100,000, more preferably 2,000 to 60,000, and still more preferably 3,000 to 30,000.
Examples of such a polymer type antistatic agent include “Peletron” (trade name, manufactured by Sanyo Chemical Industries, Ltd.) and “Statlite” (trade name, manufactured by The Lubrizol Corporation).
The content of the polymer type antistatic agent is in the range of 5 to 30 parts by weight with respect to 100 parts by weight of the propylene polymer composition (c). Preferably it is the range of 10-15 weight part. When the content of the polymer type antistatic agent is 5 parts by weight or more, sufficient antistatic performance can be obtained. When the content of the polymer-type antistatic agent is 30 parts by weight or less, the strength of the molded product is improved, the volatile components are reduced, and the production cost is reduced.

(4) Other additives In the propylene-based resin composition for electronic device component conveying members of the present invention, in addition to the components described above, various antioxidants used as stabilizers for propylene-based polymers, ultraviolet rays, and the like Additives such as an absorber, a light stabilizer, a nucleating agent, and a neutralizing agent can be blended.
Specifically, as the antioxidant, bis (2,6-di-t-butyl-4-methylphenyl) pentaerythritol-di-phosphite, di-stearyl-pentaerythritol-di-phosphite, bis ( 2,4-di-t-butylphenyl) pentaerythritol-diphosphite, tris (2,4-di-t-butylphenyl) phosphite, tetrakis (2,4-di-t-butylphenyl) -4 Phosphorous antioxidants such as 4,4'-biphenylene-diphosphonite, tetrakis (2,4-di-t-butyl-5-methylphenyl) -4,4'-biphenylene-diphosphonite, 2,6-di-t-butyl-p-cresol, tetrakis [methylene (3,5-di-t-butyl-4-hydroxyhydrocinnamate)] methane, 1, , 5-trimethyl-2,4,6-tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene, tris (3,5-di-t-butyl-4-hydroxybenzyl) isocyanurate, etc. Phenolic antioxidants, di-stearyl-β, β'-thio-di-propionate, di-myristyl-β, β'-thio-di-propionate, di-lauryl-β, β'-thio-di- And thio antioxidants such as propionate.

  Examples of the ultraviolet absorber include 2-hydroxy-4-n-octoxybenzophenone, 2- (2′-hydroxy-3 ′, 5′-di-t-butylphenyl) -5-chlorobenzotriazole, 2- (2 And ultraviolet absorbers such as' -hydroxy-3'-t-butyl-5'-methylphenyl) -5-chlorobenzotriazole.

  Examples of the light stabilizer include n-hexadecyl-3,5-di-t-butyl-4-hydroxybenzoate, 2,4-di-t-butylphenyl-3 ′, 5′-di-t-butyl-4 ′. -Hydroxybenzoate, bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, dimethyl-2- (4-hydroxy-2,2,6,6-tetramethyl-1-piperidyl) succinate ) Ethanol condensate, poly {[6-[(1,1,3,3-tetramethylbutyl) amino] -1,3,5-triazine-2,4diyl] [(2,2,6,6- Tetramethyl-4-piperidyl) imino] hexamethylene [(2,2,6,6-tetramethyl-4-piperidyl) imino]}, N, N′-bis (3-aminopropyl) ethylenediamine-2,4- Bis [N-butyl-N- ( , Mention may be made of a light stabilizer such as 2,2,6,6-pentamethyl-4-piperidyl) amino] -6-chloro-1,3,5-triazine condensate.

  Furthermore, an amine-based antioxidant represented by the following formula (1) or the following formula (2) having good NOx gas discoloration resistance, 5,7-di-t-butyl-3- (3,4-di- Examples include lactone antioxidants such as methyl-phenyl) -3H-benzofuran-2-one and vitamin E antioxidants such as the following formula (3).

  As the nucleating agent, various general known nucleating agents can be used. For example, sterically hindered amide compounds, organic dicarboxylic acid metal salts, organic monocarboxylic acid metal salts, polymer nucleating agents, sorbitol-based or Derivatives thereof, nonitol or derivatives thereof, and metal salts of diterpenic acids.

Examples of the neutralizing agent include metal fatty acid salts such as calcium stearate, zinc stearate, and magnesium stearate, hydrotalcite (trade name: DHT-4A, represented by the following formula (4) manufactured by Kyowa Chemical Industry Co., Ltd.). Magnesium aluminum composite hydroxide salt), Mizukarak (trade name, lithium aluminum composite hydroxide salt represented by the following formula (5) manufactured by Mizusawa Chemical Co., Ltd.), and the like.
Mg _1-x Al _x (OH) ₂ (CO ₃ ) _{x / 2} · mH ₂ O (4)
[Wherein x is 0 <x ≦ 0.5, and m is a number of 3 or less. ]
[Al ₂ Li (OH) ₆ ] _n X · mH ₂ O (5)
[Wherein, X is an inorganic or organic anion, n is the valence of the anion (X), and m is 3 or less. ]

  In addition, various other known additives such as antistatic agents other than polymer-type antistatic agents, lubricants, dispersants such as fatty acid metal salts, dyes, pigments and the like are blended within a range that does not impair the object of the present invention. Can do.

  As long as the properties such as properties, functions, and transparency of the propylene-based resin composition for electronic device component conveying members of the present invention are not impaired, other than propylene-based (co) polymer (a) and propylene-based polymer (b) Other polymers, polyethylene, ethylene-propylene copolymer, ethylene-propylene-diene copolymer, ethylene-butene-1 copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylate copolymer, acrylate polymer , 1 to 30 parts by weight can be arbitrarily added to the propylene polymer composition (c) 100 parts by weight. Similarly, elastomers such as natural rubber, butyl rubber, diene rubber, EPR and EPDM can be blended. Furthermore, general-purpose inorganic fillers such as talc, calcium carbonate, silica, alumina, gypsum, and mica can be used in combination.

[2] Characteristics of propylene-based resin composition for electronic device component transport member (1) Flexural modulus The flexural modulus of the propylene-based resin composition for electronic device component transport member of the present invention is based on JIS K7152-1. When the molded multipurpose test piece is machined to a predetermined size by cutting and then measured at 23 ° C. in accordance with JIS K7171, it is preferably 650 MPa or more, more preferably 800 MPa or more, and still more preferably 1000 MPa or more. It is preferable that the flexural modulus is 650 MPa or more because it is possible to prevent the container from being deformed when a silicon wafer or the like is stored in the container. On the other hand, when it is 2200 MPa or less, since the impact resistance becomes good, it is difficult to break, which is preferable.

(2) Volatile component content The propylene-based resin composition for electronic device component transport members of the present invention preferably has a volatile component content of 20 ppm by weight or less, more preferably 15 ppm by weight or less, and even more preferably. 10 ppm by weight or less. When the volatile component content is not more than the above upper limit, when the propylene-based resin composition for an electronic device component transport member is molded into an electronic device component transport molded product having a high degree of integration and processing accuracy, Contamination due to adhesion to electronic device parts can be suppressed, and the frequency of occurrence of malfunctions in part performance can be reduced.

  In the propylene-based resin composition for electronic device component transport members of the present invention, the halogen content contained in the composition, for example, the chlorine content is preferably 10 ppm by weight or less, more preferably 5 wt. ppm or less. A low halogen content is preferable because it does not exhibit corrosivity.

[3] Method for Producing Propylene Resin Composition for Electronic Device Component Conveying Member The propylene resin composition for an electronic device component conveying member of the present invention comprises a propylene-based (co) polymer (a), a propylene-based copolymer ( b) and the polymer type antistatic agent and, if necessary, each predetermined amount of other additives are put into a Henschel mixer (trade name), a super mixer, a ribbon blender, etc. It can be obtained by melt kneading in a temperature range of 190 to 260 ° C. with a machine, a twin screw extruder, a Banbury mixer, a plastic bender, a roll or the like.

[4] Molded product for transporting electronic device parts A molded product, a molded product for transporting electronic device parts, an electronic device component transport case, and a semiconductor related component transport case using the propylene-based resin composition for electronic device component transport members of the present invention For production, a propylene-based resin composition for electronic device component transport members is molded into a molded product and a case having a desired shape by an injection molding method or the like. The transport case is a case including various magazines, trays, boxes, containers and the like for storage purposes.
Here, the electronic device parts are not particularly limited, but for example, silicon wafer, hard disk, microprocessor, light emitting diode, sapphire wafer, disk substrate, IC chip, magneto-optical disk (MO), DVD, BD, various memories. It refers to parts for various electronic devices such as LCD high-performance substrate glass, LCD color filters, hard disk magnetoresistive heads, CCDs, CCD devices, reticles, and optical semiconductor components. Here, the semiconductor-related components are not particularly limited, but include, for example, various semiconductor-related components such as a silicon wafer, a microprocessor, a light emitting diode, and various memories.

  Examples of the injection molding method include known molding methods such as a general injection molding method, injection foam molding method, supercritical injection foam molding method, ultra-high speed injection molding method, injection compression molding method, gas assist injection molding. And methods such as a sandwich molding method, a sandwich foam molding method, and an insert / outsert molding method.

EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated in detail, this invention is not limited by these Examples.
In the following examples and comparative examples, the physical properties of the propylene-based (co) polymer (a), the propylene-based copolymer (b), and the propylene-based resin composition for electronic device component conveying members are measured by the following methods. It is what I followed.
<1. Method of measurement>

(1) Melt flow rate (MFR):
It measured based on JISK7210 (230 degreeC, 2.16kg load).

(2) Calculation of ethylene content of propylene-based (co) polymer (a)
The ethylene content in the random copolymer was measured by infrared spectroscopy using a characteristic absorber of 733 cm ⁻¹ with an ethylene / propylene random copolymer whose composition was verified by ¹³ C-NMR as a reference substance. The pellets were formed into a film having a thickness of about 500 microns by press molding.

(3) Measurement of molecular weight and molecular weight distribution:
The molecular weight distribution Mw / Mn of the propylene-based (co) polymer (a) was calculated by measuring the weight average molecular weight Mw and the number average molecular weight Mn by gel permeation chromatography (GPC). The measurement conditions are as follows.
Apparatus: GPC manufactured by WATERS (ALC / GPC 150C)
Detector: MIRAN 1A IR detector manufactured by FOXBORO (measurement wavelength: 3.42 μm)
Column: AD806M / S (3 in series) manufactured by Showa Denko KK
Mobile phase solvent: ο-dichlorobenzene
Measurement temperature: 140 ° C
Flow rate: 1.0 ml / min
Injection volume: 0.2ml

(4) Melting peak temperature (melting point) (Tm, unit: ° C.):
Using a differential scanning calorimeter (DSC), taking a sample amount of 5.0 mg, once raising the temperature to 200 ° C., erasing the heat history, holding at 200 ° C. for 5 minutes, and then decreasing the temperature at 10 ° C./min The temperature at the top of the endothermic peak was lowered to 40 ° C., crystallized, and measured again at a heating rate of 10 ° C./min to be melted, and the endothermic peak top temperature was defined as the melting peak temperature (melting point) (Tm).

(5) Calculation of component amount of propylene-based copolymer (b) Calculation was performed using temperature-temperature elution fractionation (TREF).
Propylene-ethylene random copolymer (α) and propylene-α-olefin random copolymer (β) can be specified by the material balance at the time of production (material balance). It is desirable to use the following analysis to identify
The technique for evaluating the crystallinity distribution of a propylene-ethylene random copolymer by TREF is well known to those skilled in the art. For example, detailed measurement methods are shown in the following documents.
G. Glockner, J. et al. Appl. Polym. Sci. : Appl. Polym. Symp. 45, 1-24 (1990)
L. Wild, Adv. Polym. Sci. 98, 1-47 (1990)
J. et al. B. P. Soares, A .; E. Hamielec, Polymer; 36, 8, 1639-1654 (1995)
The propylene-based copolymer (b) in the present invention has a large difference in crystallinity between the propylene-ethylene random copolymer (α) and the propylene-α-olefin random copolymer (β). Since each crystallinity distribution is narrowed by being produced using a catalyst, there are very few intermediate components between the two, and both can be distinguished with high accuracy by TREF.
A specific method will be described with reference to the figure showing the elution amount and the elution amount integration by TREF in FIG. In the TREF elution curve (plot of elution amount with respect to temperature), propylene-ethylene random copolymer (α) and propylene-α-olefin random copolymer (β) have different T (α) and T ( Since the elution peak is shown in β) and the difference is sufficiently large, separation is possible at an intermediate temperature T (C) (= {T (α) + T (β)} / 2).

In addition, the lower limit of the TREF measurement temperature is −15 ° C. in the apparatus used for this measurement, but in the case where the crystallinity of the component (α) is very low or an amorphous component, There may be no peak in the range. (In this case, the concentration of the component (α) dissolved in the solvent is detected at the measurement temperature lower limit (ie, −15 ° C.).)
At this time, T (α) is considered to exist below the lower limit of the measurement temperature, but the value cannot be measured. In such a case, T (α) is the lower limit of the measurement temperature −15 Defined as ° C.
Here, if the integrated amount of the components eluted before T (C) is defined as W (α) wt%, and the integrated amount of the portion eluted at T (C) or higher is defined as W (β) wt%, W (α) Corresponds almost to the amount of the low-crystalline or amorphous component (α), and the cumulative amount W (β) of the component eluted at T (C) or higher is the component (β) having a relatively high crystallinity. Almost corresponds to the amount of. The elution amount curve obtained by TREF and the above-described methods for calculating the various temperatures and amounts obtained therefrom are performed as illustrated in FIG.

[apparatus]
(TREF part)
TREF column: 4.3 mmφ × 150 mm stainless steel column Column packing material: 100 μm Surface inert treatment glass beads Heating method: Aluminum heat block Cooling method: Peltier element (Peltier element is cooled by water)
Temperature distribution: ± 0.5 ° C
Temperature controller: Chino Corporation Digital Program Controller KP1000 (Valve Oven)
Heating method: Air bath oven Measurement temperature: 140 ° C
Temperature distribution: ± 1 ° C
Valve: 6-way valve 4-way valve (Sample injection part)
Injection method: Loop injection method Injection volume: Loop size 0.1ml
Inlet heating method: Aluminum heat block measurement temperature: 140 ° C
(Detection unit)
Detector: Fixed wavelength infrared detector FOXBORO MIRAN 1A
Detection wavelength: 3.42 μm
High-temperature flow cell: Micro flow cell for LC-IR Optical path length: 1.5 mm Window shape: 2φ x 4 mm long circle Synthetic sapphire window measurement temperature: 140 ° C
(Pump part)
Liquid feed pump: SSC-3461 pump manufactured by Senshu Kagaku Co. [Measurement conditions]
Solvent: o-dichlorobenzene (containing 0.5 mg / mL BHT)
Sample concentration: 5 mg / mL
Sample injection volume: 0.1 mL
Solvent flow rate: 1 mL / min

(6) Haze value It measured based on JISK7136 using the sheet piece of thickness 1mm.

(7) Surface Specific Resistance A Hiresta IP high resistivity meter (MCP-HT260) manufactured by Dia Instruments Co., Ltd. was used, the applied voltage was 10 V, and the electrode was a double ring method (HRS probe). The value 10 seconds after voltage application was adopted as the measured value.

(8) Flexural modulus Measured according to JIS K7171.

(9) Measurement of volatile component content The volatile component content (amount of oligomers having 30 or less carbon atoms) generated from the propylene-based resin composition for electronic device parts conveying members is the dynamic headspace (DHS) -GC /. Measurements were taken by MS. The volatile component content is the ratio (unit: ppm by weight) of the volatile component content to the propylene-based resin composition for electronic device component transport members. The measurement method is shown below.

(I) Outline of Measurement and Evaluation After heating a pellet sample of a propylene-based resin composition for an electronic device component conveying member to 100 ° C. and collecting volatile components generated there at −150 ° C., a gas chromatograph (GC) / Separation / detection and identification of each volatile component were performed using a mass spectrometer (MS). The calibration curve is a gas chromatogram obtained by measuring aliphatic straight-chain saturated hydrocarbons each having 2 to 10 carbon atoms in a standard mixed solution with a concentration of 1000 μg / ml with n-heptane solvent under the same conditions as the sample. / Measured by mass spectrometry. Quantification was calculated with a value based on n-eicosane.

(II) Apparatus and measuring method
(I) Heat eviction (dynamic headspace) device:
About 50 mg of a pellet sample of a propylene resin composition for an electronic device component conveying member is precisely weighed and filled in a heat extraction tube (TDS tube manufactured by GERSTEL), and about 10 mg of quartz wool (manufactured by GL Sciences) at both ends. Cat.No. 3001-1404). After the previous TDS tube was loaded into a 40 ° C. heating extraction apparatus (TDS-A manufactured by GERSTEL), the inside of the tube was replaced with helium, and the temperature was raised to 100 ° C. at a rate of 60 ° C./min. Heated for minutes. During this heating period, the volatile component generated from the sample was collected by cooling the GC injection port (CIS4 manufactured by GERSTEL) filled with TENAX to −150 ° C. The collected components were vaporized by rapidly heating the collected portion to 320 ° C. and introduced into the GC column.
(Ii) Gas chromatograph (GC):
HP 6890 made by Agilent
Column: DB-5ms
Column heating conditions: 40 ° C. × 5 min to 10 ° C./min to 300 ° C. × 15 min
(Iii) Mass spectrometer (MS):
Mass Sensitive Detector 5973N made by Agilent
An electron impact (EI) method was used for ionization of the measurement component.

<2. Resin, Additive>
2-1. Production of propylene-based (co) polymer (a) (1) Production Example 1
(I) Preparation of catalyst The following operations were carried out under inert gas using deoxygenated and dehydrated solvent and monomer.

(A) Chemical treatment of ion-exchange layered silicate: 1130 g of distilled water and 750 g of 96% sulfuric acid are added to a separable flask, the internal temperature is kept at 90 ° C., and granulated smectite having an average particle size of 25 μm (Mizusawa) 300 g of a trade name “Benley SL” manufactured by Chemical Industry Co., Ltd. was added and reacted for 5 hours.
Washing: Cooled to room temperature in 1 hour and washed with distilled water to pH = 3.69. The washing magnification at this time was 1 / 10,000 or less. The solid at this stage was partially dried, and the elution rate by acid treatment was determined to be 33.5%.
Salt treatment: 211 g of lithium sulfate monohydrate was dissolved in 521 g of distilled water, and 100 g (dry weight) of the solid obtained by the acid treatment was further added, followed by stirring at room temperature for 120 minutes. The slurry was filtered, 3000 g of distilled water was added to the obtained solid, and the mixture was stirred at room temperature for 5 minutes. Further, the slurry was filtered. Distilled water 2500g was added to the obtained solid, and it filtered again after stirring for 5 minutes. This operation was repeated four more times. The obtained solid was preliminarily dried at 130 ° C. for 2 days under a nitrogen stream, then coarse particles of 53 μm or more were removed, and further dried under reduced pressure at 200 ° C. for 2 hours to obtain chemically treated smectite.

(B) Silicate activation treatment 200 g of the above chemically treated smectite was introduced into a glass reactor equipped with a stirring blade with an internal volume of 3 L, 750 ml of normal heptane, and a heptane solution of trinormal octyl aluminum (500 mmol). And stirred at room temperature. After 1 hour, the slurry was washed with normal heptane (residual liquid ratio less than 1%), and the amount of slurry was adjusted to 2000 mL.

(C) Preparation of Prepolymerization Catalyst Next, (r) -dimethylsilylenebis [2-methyl-4- (4-chlorophenyl) -4H-azurenyl] zirconium dichloride 3 mmol toluene slurry 870 mL and triisobutylaluminum (15 mmol) A mixed solution obtained by reacting 42.6 mL of a heptane solution in advance at room temperature for 1 hour was added to the above chemically treated smectite slurry, and stirred for 1 hour to prepare a smectite / complex slurry. Then, normal heptane 2.1L was introduce | transduced into the stirring type autoclave of internal volume 10L fully substituted with nitrogen, and it hold | maintained at 40 degreeC. There, the smectite / complex slurry prepared earlier was introduced. When the temperature was stabilized at 40 ° C., propylene was supplied at a rate of 100 g / hour, and the temperature was maintained. After 4 hours, the propylene feed was stopped and maintained for another 2 hours. About 3 L of the supernatant was removed from the recovered prepolymerized catalyst slurry, 170 mL of a heptane solution of triisobutylaluminum (30 mmol) was added, stirred for 10 minutes, and then heat-treated at 40 ° C. under reduced pressure. By this operation, a prepolymerized catalyst containing 2.30 g of polypropylene per 1 g of catalyst was obtained.

(Ii) Production of propylene-based (co) polymer (a) A liquid phase polymerization tank with an internal volume of 270 L, a deactivation tank with an internal volume of 400 L, a slurry circulation pump, a circulation line hydraulic classifier, a concentrator, Deactivation cleaning system consisting of flow pump and cleaning liquid receiving tank, high pressure degassing system consisting of double tube heat exchanger and fluidized flash tank, and process incorporating post-treatment system including low pressure degassing tank and dryer The continuous production of propylene-ethylene copolymer was carried out.
The prepolymerized catalyst prepared above was dispersed in liquid paraffin (trade name “White Rex 335” manufactured by Tonen Co., Ltd.) at a concentration of 15% by weight, and introduced into the liquid phase polymerization tank at 0.35 g / hr as a catalyst component. Furthermore, liquid propylene was supplied to this polymerization tank at 40 kg / hr, ethylene at 0.4 kg / hr, hydrogen at 0.25 g / hr, and triisobutylaluminum at 18 g / hr, and the internal temperature was maintained at 70 ° C. Then, polymerization was performed. A mixed slurry of the polymer and liquid propylene was extracted from the liquid phase polymerization tank into a deactivation washing tank as a polymer at 12.0 kg / hr. At this time, the average residence time of the catalyst in the polymerization tank was 1.3 hours. Ethanol was supplied to the deactivation washing tank at 21.0 g / hr as a deactivation agent. Furthermore, liquid propylene was supplied at 40 kg / hr, and the internal temperature was kept at 50 ° C. by heating with a jacket. The polymer was extracted from the lower part of the classifier into a high-pressure degassing tank, further passed through a low-pressure degassing tank, and dried with a dryer. The internal temperature of the dryer was adjusted to 80 ° C. and the residence time was 1 hour, and dry nitrogen at room temperature was further flowed in the countercurrent direction of the powder flow at a flow rate of 12 m ³ / hr. The dried polymer was taken out from the hopper.

  On the other hand, the liquid propylene separated from the polymer through the classifier and the concentrator was extracted into a washing liquid receiving tank at 40 kg / hr. The yield of the obtained polymer per 1 g of the solid catalyst was 34.3 kg, ethylene content = 0.75 wt%, MFR = 30.6 g / 10 min, molecular weight distribution (Mw / Mn) = 2.8, Tm = It was 141.7 ° C.

2-2. Production of propylene copolymer (b) (1) Production Example 2
(I) Preparation of prepolymerization catalyst Chemical treatment of silicate: slowly add 3.75 liters of distilled water, followed by 2.5 kg of concentrated sulfuric acid (96%) to a glass separable flask equipped with a 10 liter stirring blade. Added. At 50 ° C., 1 kg of montmorillonite (Mizusawa Chemical Co., Ltd. Benclay SL; average particle size = 50 μm) was further dispersed, heated to 90 ° C., and maintained at that temperature for 6.5 hours. After cooling to 50 ° C., the slurry was filtered under reduced pressure to recover the cake. 7 liters of distilled water was added to this cake to reslurry it, and then filtered. This washing operation was performed until the pH of the washing liquid (filtrate) exceeded 3.5. The collected cake was dried at 110 ° C. overnight under a nitrogen atmosphere. The weight after drying was 707 g. The chemically treated silicate was dried by a kiln dryer.

Preparation of catalyst: 200 g of the dry silicate obtained above was introduced into a glass reactor equipped with a stirring blade with an internal volume of 3 liters, 1160 ml of mixed heptane, and further 840 ml of a heptane solution of triethylaluminum (0.60 M) were added. Stir at room temperature. After 1 hour, the mixture was washed with mixed heptane, and the silicate slurry was adjusted to 2.0 liters. Next, 9.6 ml of a heptane solution of triisobutylaluminum (0.71 M / L) was added to the prepared silicate slurry and reacted at 25 ° C. for 1 hour. In parallel, [(r) -dichloro [1,1′-dimethylsilylenebis {2-methyl-4- (4-chlorophenyl) -4H-azurenyl}] zirconium] (according to Examples in JP-A-10-226712) 33.1 ml of a triisobutylaluminum heptane solution (0.71 M) was added to 2180 mg (3 mmol) and 870 ml of mixed heptane, and the mixture reacted at room temperature for 1 hour was added to the silicate slurry. Stir for hours.

Preliminary polymerization: Subsequently, 2.1 liters of normal heptane was introduced into a stirring autoclave having an internal volume of 10 liters that had been sufficiently substituted with nitrogen, and maintained at 40 ° C. The previously prepared silicate / metallocene complex slurry was introduced therein. When the temperature was stabilized at 40 ° C., propylene was supplied at a rate of 100 g / hour to maintain the temperature. After 4 hours, the supply of propylene was stopped and maintained for another 2 hours. After completion of the prepolymerization, the remaining monomer was purged, stirring was stopped and the mixture was allowed to stand for about 10 minutes, and then about 3 liters of the supernatant was decanted. Subsequently, 9.5 ml of a heptane solution of triisobutylaluminum (0.71 M / L) and 5.6 liters of mixed heptane were added, and the mixture was stirred at 40 ° C. for 30 minutes and allowed to stand for 10 minutes. Removed liters. This operation was further repeated 3 times. When the component analysis of the final supernatant was performed, the concentration of the organoaluminum component was 1.23 mmol / L and the Zr concentration was 8.6 × 10 ⁻⁶ g / L, and the abundance in the supernatant with respect to the amount charged. Was 0.016% by weight. Subsequently, 17.0 ml of a heptane solution of triisobutylaluminum (0.71 M / L) was added, followed by drying at 45 ° C. under reduced pressure. By this operation, a prepolymerized catalyst containing 2.16 g of polypropylene per 1 g of catalyst was obtained.
Using this prepolymerized catalyst, a propylene-based copolymer (b) comprising a propylene-ethylene random copolymer (α) and a propylene-α-olefin random copolymer was produced according to the following procedure.

(Ii) Production of propylene copolymer (b) A continuous gas phase polymerization reactor comprising two horizontal polymerization tanks equipped with a stirrer was used. The prepolymerized catalyst obtained above was continuously supplied to the first reactor (internal volume 40 m ³ ) at 130 g / Hr and triisobutylaluminum was continuously supplied at 1.0 kg / Hr. Further, hydrogen is adjusted so that the ratio of the hydrogen concentration in the polymerization vessel to the propylene concentration becomes 1.6 × 10 ⁻⁴ molar ratio, and the ratio of the ethylene concentration to the propylene concentration becomes 5.8 × 10 ⁻⁴ molar ratio. The first polymerization reaction was carried out by supplying ethylene and propylene monomer to the polymerization vessel so that the pressure in the polymerization vessel was 2.25 MPa and the temperature was kept at 62 ° C.
The heat of reaction was removed by the heat of vaporization of the raw material liquefied propylene.
The propylene-ethylene random copolymer produced in the polymerization vessel was continuously withdrawn so that the retained level of the polymer was 45% by volume of the reaction volume, and was supplied to the polymerization vessel in the second polymerization step.
When the propylene-ethylene random copolymer (propylene-α-olefin random copolymer (β)) obtained in the first polymerization reaction was analyzed, the yield of the polymer per 1 g of the solid catalyst was 29 kg, the ethylene content. = 1.9 wt%, MFR = 6.9 g / 10 min, molecular weight distribution (Mw / Mn) = 2.3, Tm = 133 ° C.

In the second reactor (internal volume 40 m ³ ), hydrogen was added so that the ratio of the polymer from the first polymerization step and the hydrogen concentration in the polymerization vessel to the propylene concentration was 4.3 × 10 ⁻⁴ molar ratio. Then, ethylene was supplied so that the ratio of ethylene concentration to propylene concentration was 0.36 molar ratio, and propylene monomer was supplied into the polymerization vessel so that the pressure in the polymerization vessel was 2.2 MPa and the temperature was maintained at 70 ° C. 2 polymerization reaction was performed.
The polymerization amount of each polymer obtained from the first polymerization reaction and the second polymerization reaction was adjusted by supplying a polymerization activity inhibitor. The reaction heat was removed by the heat of vaporization of the raw material liquefied propylene.
The propylene copolymer (b) produced in the second polymerization step was continuously extracted from the polymerization vessel so that the retained level of the polymer was 55% by volume of the reaction volume.
When the obtained propylene copolymer (b) was analyzed, the yield of the polymer per 1 g of the solid catalyst was 52 kg, the MFR was 7.2 g / 10 min, and the ethylene content was 6.2% by weight. The propylene-ethylene random copolymer (α) obtained by the second polymerization reaction has an MFR of 7.6 g / 10 min, a molecular weight distribution (Mw / Mn) of 2.4, and an ethylene content of 11.6 wt. The proportion of the propylene-ethylene random copolymer (α) obtained from the second polymerization reaction in the propylene copolymer (b) was 44.3% by weight.

2-3. Propylene-based (co) polymer (a)
(PP-1) Propylene-based resin obtained by polymerization in Production Example 1 2-4. Propylene copolymer (b)
(PP-2) Propylene-based resin obtained by polymerization in Production Example 2

2-5. Polymer Type Antistatic Agent Polyether / Polyolefin Block Copolymer (T-1) Product Name “Peletron UC” manufactured by Sanyo Chemical Industries
IR chart: See FIG.

2-6. Other Additives (A-1) Hindered Phenol Antioxidant “IR1010”: Tetrakis [methylene-3- (3 ′, 5′-di-t-butyl-4′-hydroxylphenyl) propionate] methane BASF Japan ( Product name “IRGANOX1010”
(N-1) Nucleator “NX8000J” 1,2,3-trideoxy-4,6: 5,7-bis-[(4-prolphenyl) methylene] -nonitol Miliken & Co. Name “Mirad NX8000J”

<3. Examples 1-4, Comparative Examples 1-12>
Each polymer and additive were prepared at the blending ratio (parts by weight) shown in Table 1, and after dry blending with a super mixer, the die outlet temperature was 220 ° C. using a TEM-35B twin screw extruder manufactured by Toshiba Machine. And kneaded and pelletized. Physical properties were measured using the obtained pellets. The evaluation results are shown in Table 1.

  As is clear from Table 1, Examples 1 to 4 contain a specified amount of a propylene-based (co) polymer (a), a propylene-based copolymer (b) and a polymer-type antistatic agent according to the present invention. Therefore, it can be seen that the antistatic performance is excellent, the rigidity and transparency are good, and the volatile component is small. From the result of Comparative Example 4, when the content of the propylene-based copolymer (b) exceeds the specified amount of the present invention, the rigidity is undesirably low. Moreover, generally transparency becomes favorable by containing the random copolymer with comparatively much ethylene content like a propylene-type copolymer (b). As shown in Examples 1 to 3 and Comparative Examples 1 to 11 and FIG. 2, it is a system containing a polymer type antistatic agent, and further contains a propylene copolymer (b) according to the present invention. It can be seen that the effect of improving transparency can be obtained. In general, as a means for improving the transparency of polypropylene, there is a method of adding a transparent nucleating agent. As in Comparative Example 12, it can be seen that the effect was not obtained with a polymer-type antistatic agent contained.

  The propylene-based resin composition for electronic device parts conveying member of the present invention is excellent in cleanliness without deterioration in performance during conveyance, excellent in dust resistance of the case, and further excellent in transparency. It turns out that it is useful for obtaining a member, and is especially suitable for the molded article for electronic device component conveyance.

Claims (6)

50 to 98 parts by weight of a propylene-based (co) polymer (a) satisfying the following conditions (Hi) to (H-ii), and a propylene-based copolymer satisfying the following conditions (Ai) to (A-iii) An electronic device component comprising 5 to 30 parts by weight of a polymer-type antistatic agent with respect to 100 parts by weight of a propylene polymer composition (c) comprising 2 to 50 parts by weight of a polymer (b) Propylene-based resin composition for conveying members.
(Hi) A propylene homopolymer or a propylene copolymer comprising propylene and an α-olefin having a content of less than 1% by weight.
(H-ii) The melt flow rate (hereinafter sometimes abbreviated as MFR) based on JIS K7210 (230 ° C., 2.16 kg load) is in the range of 2 to 100 g / 10 minutes.
(Ai) A metallocene propylene-α-olefin random copolymer.
(A-ii) The α-olefin content is in the range of 3 to 17% by weight.
(A-iii) MFR is in the range of 0.5 to 80 g / 10 min. The propylene-based copolymer (b) satisfies the following conditions (Bi) to (B-ii): 30 to 70% by weight of the propylene-ethylene random copolymer (α) and the following conditions (Ci) to ( 2. The propylene-based resin composition for an electronic device component conveying member according to claim 1, comprising 30 to 70% by weight of a propylene-α-olefin random copolymer (β) satisfying C-iii).
(Bi) A metallocene propylene-ethylene random copolymer.
(B-ii) The ethylene content is in the range of 7 to 25% by weight.
(Ci) a metallocene propylene-α-olefin random copolymer.
(C-ii) The melting peak temperature (Tm) is in the range of 125 to 145 ° C.
(C-iii) The α-olefin content is in the range of 1 to 5% by weight.   The propylene-based resin composition for an electronic device component conveying member according to claim 1 or 2, wherein a flexural modulus measured in accordance with JIS K7171 is 650 to 2200 MPa.   Volatile component content is 20 weight ppm or less, The propylene-type resin composition for electronic device components conveyance members of any one of Claims 1-3.   The molded article for electronic device component conveyance obtained using the propylene-type resin composition for electronic device component conveyance members of any one of Claims 1-4.   The semiconductor related components conveyance case obtained using the propylene-type resin composition for electronic device components conveyance members of any one of Claims 1-4.