JPH08283490A - Polypropylene-based random copolymer and its use - Google Patents

Abstract

PURPOSE: To obtain the subject composition by blending a polypropylene-based random copolymer having high stereoregularity and high crystallinity with a phenolic stabilizer, providing a molding excellent in thermal stability, weatherability rigidity, transparency, solvent resistance and moisture resistance. CONSTITUTION: This polypropylene-based random copolymer is obtained by blending (A) a polypropylene-based random copolymer having 0.1-500g/10 minutes melt flow rate at 230 deg.C under 2.16kg load, >=50% crystallinity of an insoluble matter in decane at 23 deg.C, <=0.910g/cm<3> density and 0.97-1.01 value of stereoregularity [M5 ] of the formula (Pmmmm is CH3 absorption intensity at the third unit at a part at which propylene units are subjected to isotactic bond of five continuous units; Pw is CH3 absorption intensity of the propylene unit; Sαγ is secondary carbon absorption intensity in which one of two tertiary carbons closest to a secondary carbon in a main chain exists at the α-position and the other exists at the γ-position; Sαδ<+> is the secondary carbon; Tδ<+> δ<+> is tertiary carbon derived absorption intensity) from absorption intensities of Pmmmm, Pw, Sar, Sαδ<+> and Tδ<+> δ<+> in<13> C-NMR spectrum of insoluble component in decane at 23 deg.C with (B) 0.001-10wt.% of a phenolic stabilizer.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a propylene-based random copolymer composition and its use, and more specifically,
Propylene-based random copolymer and specific at least 1
TECHNICAL FIELD The present invention relates to a propylene-based random copolymer composition containing various stabilizers and its use.

[0002]

BACKGROUND OF THE INVENTION Crystalline polyolefins such as crystalline polypropylene are composed of compounds of transition metals of Groups IV to VI of the periodic table and organometallic compounds of metals of groups I to III of the periodic table. It is well known that it can be obtained by polymerizing an olefin using a so-called Ziegler-Natta catalyst. A method for obtaining a highly stereoregular crystalline polyolefin with high polymerization activity using such a catalyst has been studied.

For example, JP-A-61-209207, JP-A-62-104810, JP-A-62-104811, JP-A-62-104810.
-104812, JP 62-104813, JP 1-3111
JP-A No. 06-180180, JP-A No. 1-318011, JP-A No. 2-166104, etc., formed from a titanium-containing solid catalyst component containing titanium, magnesium, halogen and an electron donor, an organoaluminum compound and an electron donor. It is disclosed that when an olefin is polymerized with the catalyst, a polyolefin having high polymerization activity and high stereoregularity can be obtained.

Further, the present applicant has already made many proposals as described below for an olefin polymerization catalyst and an olefin polymerization method for obtaining a highly stereoregular crystalline polyolefin with high polymerization activity. (For example, JP-A-50-108385, JP-A-50-126590, JP-A-50-126590
51-20297, JP-A-51-28189, JP-A-51-645
86, JP-A-51-92885, JP-A-51-136625, JP-A-52-87489, JP-A-52-100596, JP-A-52-147688, JP-A-52-104593,
JP-A-53-2580, JP-A-53-40093, JP-A-5
3-40094, JP-A-53-43094, JP-A-55-1351
02, JP-A-55-135103, JP-A-55-152710, JP-A-56-811, JP-A-56-11908, JP-A-56-18606, JP-A-58-83006, JP-A-58
-138705, JP-A-58-138706, JP-A-58-138
707, JP 58-138708, JP 58-138709
Publication, JP-A-58-138710, JP-A-58-138715, JP-A-58-138720, JP-A-58-138721,
JP-A-58-215408, JP-A-59-47210, JP-A-59-117508, JP-A-59-117509, JP-A-59
-207904, JP 59-206410, JP 59-206
408, JP 59-206407 JP, JP 61-69815 JP, JP 61-69821 JP, JP 61-69822 JP,
JP 61-69823 JP, JP 63-22806 JP, JP Sho
63-95208, JP-A-63-199702, JP-A-63-19
9703, JP 63-202603, JP 63-202604
Publication, JP-A-63-223008, JP-A-63-223009, JP-A-63-264609, JP-A-64-87610,
JP 64-156305 A, JP 2-77407 A, JP
2-84404 JP, JP2-229807 JP, JP2-22980
By the way, since crystalline polypropylene has high rigidity and generally has high heat distortion temperature, melting point, and crystallization temperature, it exhibits excellent heat resistance and has a high crystallization rate. , Shows excellent properties such as high transparency. Therefore, it is preferably used for various applications such as containers and films. Such a crystalline polypropylene is a propylene-based random copolymer obtained by copolymerizing a small amount of an olefin such as ethylene with propylene when transparency is particularly required, or when low-temperature heat-sealing properties are required in film applications. It is used as a polymer.

This propylene-based random copolymer has an advantage that it is superior in transparency, stress crack resistance and the like, for example, as compared with a low density polyethylene film in a film application. However, it has been pointed out at the same time that when used at a high temperature, a solvent-soluble component bleeds out on the surface to deteriorate transparency and solvent resistance decreases.

When molding the propylene random copolymer as described above, if the melt viscosity of the resin is low, the moldability is improved. Therefore, a method of increasing the resin temperature to lower the melt viscosity of the resin is usually adopted. Has been. However, when the resin is heated to a high temperature and molded in this way, the resin is thermally decomposed or deteriorated, and the obtained molded product is colored,
In some cases, cracks occurred, long-term heat stability and weather resistance decreased, and rigidity and heat resistance decreased.

As a result of studies to solve such problems, the present inventors have made up of a propylene-based random copolymer having a higher propylene chain stereoregularity than ever before and at least one stabilizer. The propylene-based random copolymer composition is excellent in thermal stability at the time of molding, long-term heat stability of the molded product, weather resistance, etc., as compared with conventional propylene-based random copolymers, and rigidity, transparency, They have found that they have high solvent resistance and high moisture resistance, and have completed the present invention.

[0008]

The object of the present invention is to obtain a propylene which is excellent in thermal stability during molding, long-term heat stability, weather resistance and the like, as well as in rigidity, transparency, solvent resistance and moisture resistance. An object of the present invention is to provide a random copolymer composition and a use thereof.

[0009]

SUMMARY OF THE INVENTION The propylene-based random copolymer composition according to the present invention has a melt flow rate (A) of 230 ° C. and a load of 2.16 kg in the range of 0.1 to 500 g / 10 minutes and a decane of 23 ° C. The crystallinity of the insoluble component is 50% or more, the density is 0.910 g / cm ³ or less, and 2
The stereoregularity index [M obtained by the following formula (1) from the absorption intensities of Pmmmm, Pw, Sαγ, Sαδ ⁺ and Tδ ⁺ δ ⁺ in the ¹³ C-NMR spectrum of the decane insoluble component at 3 ° C.
_[5 ]] in the range of 0.970 to 1.010, and (B) (B-1) phenolic stabilizer (B-2) organic phosphite stabilizer (B- 3) Thioether stabilizer (B-4) Hindered amine stabilizer (B-5) At least one compound selected from the group consisting of metal salts of higher fatty acids: 100 parts by weight of the propylene random copolymer (A) On the other hand, it is characterized by comprising 0.001 to 10 parts by weight;

[0010]

[Equation 10]

(However, Pmmmm: Absorption intensity derived from the methyl group of the third unit in the site where 5 units of propylene units are continuously isotactically bonded Pw: Absorption intensity derived from the methyl group of propylene unit Sαγ: In the main chain Of two secondary carbons closest to the secondary carbon, one of which is in the α-position and the other of which is in the γ-position, the absorption intensity Sαδ ⁺ : A secondary carbon in the main chain, one of the two tertiary carbons closest to the secondary carbon being in the α-position and the other in the δ-position or a position distant from the δ-position; Absorption intensity derived from primary carbon T δ ⁺ δ ⁺ : Tertiary carbon in the main chain, and one of the two tertiary carbons closest to the tertiary carbon, one of which is located at the δ position or away from the δ position. And the other is at the δ position or at a position distant from the δ position Absorption intensity from which it is derived).

In the present invention, the propylene-based random copolymer (A) contains 10 to 10,000 ppm of a constitutional unit derived from a compound represented by the following formula (i) or (ii).
It is preferable that the content is in the range of;

[0013]

[Chemical 6]

The extruded sheet according to the present invention is characterized by comprising the above-mentioned propylene-based random copolymer composition. The unstretched film according to the present invention is characterized by comprising the propylene random copolymer composition.

The stretched film according to the present invention is characterized by comprising the above-mentioned propylene random copolymer composition. The filament according to the present invention is characterized by comprising the above propylene-based random copolymer composition.

The injection-molded article according to the present invention is characterized by comprising the above-mentioned propylene-based random copolymer composition. The blow-molded article according to the present invention is characterized by comprising the above-mentioned propylene-based random copolymer composition.

The press-through pack according to the present invention is characterized by using the above-mentioned propylene-based random copolymer composition. The mold stamping molding according to the present invention is characterized by using the propylene random copolymer composition.

[0018]

DETAILED DESCRIPTION OF THE INVENTION The propylene random copolymer composition according to the present invention and its use will be described in detail below.

In the present invention, the term "polymerization" means
The term "polymer" may be used to mean not only homopolymerization but also copolymerization, and the term "polymer" may be used to include not only homopolymer but also copolymer.

First, the propylene random copolymer used in the propylene random copolymer composition of the present invention will be specifically described. The propylene-based random copolymer used in the present invention is a random copolymer of propylene and at least one olefin selected from ethylene and olefins having 4 to 20 carbon atoms.

Specific examples of the olefin having 4 to 20 carbon atoms include 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 3-methyl-1-pentene, 1-octene,
3-methyl-1-butene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-eicosene, cyclopentene, cycloheptene, norbornene,
5-ethyl-2-norbornene, tetracyclododecene, 2-
Examples thereof include ethyl-1,4,5,8-dimethano-1,2,3,4,4a, 5,8,8a-octahydronaphthalene. 4 to 2 carbon atoms
Two or more constituent units derived from 0 olefin or ethylene may be contained.

In the propylene random copolymer used in the present invention, the constitutional unit derived from propylene is 8
0 to 99 mol%, preferably 85 to 98 mol%, more preferably 87 to 97 mol%, and a structural unit derived from an olefin selected from ethylene and an olefin having 4 to 20 carbon atoms is 20 to It is desirable that the content is 1 mol%, preferably 15 to 2 mol%, and more preferably 13 to 3 mol%.

The propylene-based random copolymer used in the present invention contains a structural unit derived from a compound represented by the following formula (i) or (ii) in an amount of 10 to 10,000 ppm,
It is desirable that the content is preferably in the range of 100 to 5000 ppm.

[0024]

[Chemical 7]

In the above formula (i), the cycloalkyl group represented by X includes a cyclopentyl group, a cyclohexyl group, a cycloheptyl group and the like, and the aryl group includes a phenyl group, a tolyl group, a xylyl group and a naphthyl group. Groups and the like.

In the above formula (i) or (ii),
As the hydrocarbon group represented by R ¹ , R ² and R ³ ,
Examples thereof include an alkyl group such as a methyl group, an ethyl group, a propyl group and a butyl group, an aryl group such as a phenyl group and a naphthyl group, and a norbornyl group. Furthermore, R ¹ ,
The hydrocarbon group represented by R ² and R ³ may contain silicon or halogen.

Specific examples of the compound represented by the above formula (i) or (ii) include 3-methyl-1-butene and 3
-Methyl-1-pentene, 3-ethyl-1-pentene, 4-methyl-
1-pentene, 4-methyl-1-hexene, 4,4-dimethyl-1-hexene, 4,4-dimethyl-1-pentene, 4-ethyl-1-hexene, 3-ethyl-1-hexene, allylnaphthalene , Allylnorbornane, styrene, dimethylstyrenes, vinylnaphthalene, allyltoluenes, allylbenzene, vinylcyclohexane, vinylcyclopentane, vinylcycloheptane, allyltrialkylsilanes and the like. Among these, 3-methyl-1-butene, 3-methyl-
1-pentene, 3-ethyl-1-hexene, vinylcyclohexane, allyltrimethylsilane, preferably contains dimethylstyrene and the like, 3-methyl-1-butene,
It is more preferable to contain vinylcyclohexane and allyltrimethylsilane, and it is particularly preferable to contain 3-methyl-1-butene.

The propylene random copolymer used in the present invention is 1,3-butadiene, 1,3-pentadiene,
1,4-pentadiene, 1,3-hexadiene, 1,4-hexadiene, 1,5-hexadiene, 4-methyl-1,4-hexadiene, 5
-Methyl-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, 6-methyl-1,6-decadiene, 7-methyl-1,
From diene compounds having 4 to 20 carbon atoms such as 6-decadiene, 6-methyl-1,6-undecadiene, 1,7-octadiene, 1,9-decadiene, isoprene, butadiene, ethylidene norbornene, vinyl norbornene and dicyclopentadiene The derived structural unit may be contained in a proportion of 5 mol% or less.

The propylene random copolymer used in the present invention has a melt flow rate (MFR) of 0.1 to 500 at 230 ° C. and a load of 2.16 kg.
g / 10 min, preferably 0.1 to 300 g / 10 min, more preferably 0.2 to 100 g / 10 min, and the crystallinity of the decane insoluble component at 23 ° C. is 50% or more, It is preferably 53% or more, more preferably 55% or more, particularly preferably 56% or more,
Density is 0.910 g / cm ³ or less, preferably 0.80
0 to 0.907 g / cm ³ , more preferably 0.830
~ 0.905 g / cm ³ , particularly preferably 0.850 ~
It is preferably in the range of 0.902 g / cm ³ . Also, the intrinsic viscosity [η] of the propylene random copolymer used in the present invention measured in decalin at 135 ° C.
Is usually 30 to 0.001 dl / g, preferably 10 to 0.01 dl / g, and particularly preferably 5 to
It is preferably 0.05 dl / g.

In the present invention, the melt flow rate is 230 ° C., 2.16 k according to ASTM D1238-65T.
It is measured under the condition of g-load. The crystallinity of the decane-insoluble component at 23 ° C. is measured as follows. That is,
Copolymer sample 3 in a 1 liter flask equipped with a stirrer
g, 2,6-di tert-butyl-4-methylphenol 20m
Add 500 ml of g and n-decane, and dissolve by heating on an oil bath at 145 ° C. After the copolymer sample has dissolved, it is cooled to room temperature over about 8 hours and then kept on a 23 ° C. water bath for 8 hours. An n-decane solution containing the precipitated polymer (decane insoluble at 23 ° C.) is separated by filtration with a G-4 (or G-2) glass filter to obtain a sample. The obtained sample is 180 ℃
It is determined by measuring with a rotor flex RU300 measuring device manufactured by Rigaku Denki Co., Ltd. using a press sheet obtained by forming a 1 mm-thickness square plate with a pressure molding machine of No. 1 and then immediately water cooling. (Output 50kV, 250m
A). As a measuring method at this time, a transmission method is used, and the measurement is performed while rotating the sample.

The propylene-based random copolymer used in the present invention is Pmmmm, Pw, Sαγ, Sαδ ⁺ , Tδ in the ¹³ C-NMR spectrum of the decane-insoluble component at 23 ° C.
The value of the stereoregularity index [M ₅ ] determined by the following formula (1) from the absorption intensity of ⁺ δ ⁺ is 0.970 to 1.010, preferably 0.980 to 1.005, and more preferably 0.
It is in the range of 985 to 1.005.

[0032]

[Equation 11]

(However, Pmmmm: Absorption intensity derived from the methyl group of the third unit at the site where 5 units of propylene units are continuously isotactically bonded Pw: Absorption intensity derived from the methyl group of propylene unit Sαγ: In the main chain Of the two secondary carbons closest to the secondary carbon, one of which is in the α-position and the other of which is in the γ-position, showing an absorption intensity derived from the secondary carbon, Sαδ ⁺ : a secondary carbon in the main chain, of the two tertiary carbons closest to the secondary carbon, one is at the α-position and the other is at the δ-position or at a position distant from the δ-position Absorption intensity derived from such secondary carbon T δ ⁺ δ ⁺ : a tertiary carbon in the main chain, and one of the two tertiary carbons closest to the tertiary carbon is one from the δ position or the δ position. Distant position, and the other is at δ position or distant from δ position Specifically described absorption intensity) then stereoregularity index used for the evaluation of the stereoregularity of the propylene random copolymer used in the present invention derived from the grade carbon [M _5].

When the polypropylene is a homopolymer of propylene, the polypropylene has, for example, the following formula (A):
Can be expressed as

[0035]

Embedded image

The absorption intensity in the ¹³ C-NMR spectrum derived from the ^third methyl group (Me ³ and Me ^{4 in the} above formula (A)) in the chain of 5 propylene units represented by Pmmmm
And the absorption intensity derived from all methyl groups in the propylene unit (Me ¹ , Me ² , Me ³ in the above formula (A)) is Pw, the stereoregularity of the polypropylene represented by the above formula (A) Can be evaluated by the value obtained from the following formula (1A).

[0037]

(Equation 12)

When the polypropylene contains an ethylene unit, the polypropylene can be represented by the following formula (B-1) or (B-2). The formula (B-
1) shows the case where the propylene unit chain contains one ethylene unit, and the formula (B-2) shows the case where the propylene unit chain contains an ethylene unit chain consisting of two or more ethylene units. Is shown.

[0039]

[Chemical 9]

In such a case, a methyl group other than the methyl group at the third unit in the chain of 5 propylene units (the above formula (B-
In 1) and (B-2), the absorption intensity derived from Me ⁴ , Me ⁵ , Me ⁶ and Me ⁷ ) should be excluded in principle when evaluating stereoregularity. However, the absorption of these methyl groups is observed to overlap with the absorption of other methyl groups, so it is difficult to quantify.

Therefore, when polypropylene is represented by the formula (B-1), it is a secondary carbon in the ethylene unit and is bonded to ^a tertiary carbon (C ^a ) in the propylene unit. Absorption intensity (Sαγ) in ¹³ C-NMR spectrum derived from ^primary carbon (C ¹ ), and secondary carbon in propylene unit, which is secondary carbon (C
This is excluded using the absorption intensity (Sαγ) derived from the secondary carbon (C ³ ) bonded to ² ).

That is, the secondary carbon in the main chain,
Secondary carbon (C¹Or C³) The closest two tertiary coals
One of the primes (C^aOr C^b) Is in alpha position, while
(C ^bOr C^a) Is derived from secondary carbon such as γ position
The absorption intensity (Sαγ) doubled is subtracted from Pw
As a result, the 3rd unit of the propylene unit 5 chain
Methyl groups other than^Four, Me^Five, Me⁶And Me⁷) To
Exclude the derived absorption intensity.

When polypropylene is represented by the formula (B-2), it is a secondary carbon in an ethylene unit chain consisting of two or more ethylene units and a tertiary carbon (C secondary carbon (C ⁴ ) bound to ^d )
Intensity in the ¹³ C-NMR spectrum derived from (Sαδ ⁺ ) and the secondary carbon in the propylene unit, which is the secondary carbon (C ⁵ ) in the chain of two or more ethylene units.
This is excluded by using the absorption intensity (Sαδ ⁺ ) derived from the secondary carbon (C ⁶ ) bonded to

That is, the secondary carbon in the main chain,
Secondary carbon (C^FourOr C⁶) The closest two tertiary coals
One of the primes (C^dOr C^e) Is in alpha position, while
(C ^eOr C^d) Is at δ position or at a position distant from δ position
Absorption intensity derived from secondary carbon (Sαδ⁺)
By subtracting the doubled value from Pw,
Methyl groups other than the third methyl group in the 5-position chain (M
e^Four, Me^Five, Me⁶And Me⁷Excludes absorption intensity derived from
I do.

Therefore, the stereoregularity of the polypropylenes represented by the above formulas (B-1) and (B-2) has the following formula (1)
It can be evaluated by the value obtained from B).

[0046]

(Equation 13)

Further, when the polypropylene contains ethylene units and one propylene unit is contained in the ethylene unit chain, the polypropylene can be represented by, for example, the following formula (C).

[0048]

[Chemical 10]

In such a case, if the above formula (1B) is applied as it is, five methyl groups to be excluded (Me ⁴ , M) are excluded.
e ⁵ , Me ⁶ , Me ⁷ and Me ⁸ ) but S
Since there are four methyl groups corresponding to αγ or Sαδ ⁺ , three more methyl groups other than the third methyl group in the propylene unit 5 chain will be excluded, and further correction is required.

Therefore, the units included in the ethylene unit chain are
Derived from the tertiary carbon in the ropylene unit¹³C-NMR spectrum
This is corrected by using the absorption intensity in Koutor. sand
That is, it is the tertiary carbon in the main chain,
Two close tertiary carbons (C^f, C^g), One of
(C^f) Is at the δ position or a position distant from the δ position, while
(C ^g) Is at δ position or a position distant from δ position
Tertiary carbon (C⁷) -Derived absorption intensity (Tδ⁺δ⁺) 3
This is corrected by adding the doubled value to Pw.

Therefore, the stereoregularity of polypropylene is the stereoregularity index [M ₅ ] obtained by the following equation (1).
It can be evaluated by the value of.

[0052]

[Equation 14]

However, the expressions (1A) and (1B) are not different from the expression (1) and are regarded as a special case of the expression (1). It should be noted that although further correction is originally necessary, further correction is practically meaningless with the capability of the present NMR apparatus. Therefore, [M ₅ ]
May exceed 1, and this tendency tends to occur as the amount of comonomer increases.

In the present invention, the stereoregularity of the decane-insoluble component at 23 ° C. of the propylene random copolymer is evaluated using the above formula (1). In the present invention, the NMR measurement of the decane-insoluble component at 23 ° C. is performed, for example, as follows. That is, 0.35 g of a sample similar to that used for measuring the crystallinity was added to 2.0 ml of hexachlorobutadiene.
Heat to dissolve. Add this solution to a glass filter (G
After filtering in 2), 0.5 ml of deuterated benzene is added and charged into an NMR tube having an inner diameter of 10 mm. Next, using a JEOL GX-500 type NMR measuring device,
¹³ C-NMR measurement is performed at ° C. The total number of times is 10,000
0 times or more. The value of the stereoregularity index [M ₅ ] can be determined from the peak intensity or the sum of peak intensities based on each structure obtained by the above measurement.

The propylene random copolymer used in the present invention has a stereoregularity index [M ₅ ] of the decane-insoluble component at 23 ° C. in the range of 0.970 to 1.010.
The propylene random copolymer used in the present invention has higher rigidity, transparency, solvent resistance and moisture resistance than conventional propylene random copolymers.

Such a propylene-based random copolymer used in the present invention comprises, for example, a solid titanium catalyst component (a) containing [Ia] magnesium, titanium, halogen and an electron donor as essential components, and [II ] An organometallic catalyst component (b), [III] a silicon compound (c) represented by the following formula (iii) or a compound (d) having two or more ether bonds present through a plurality of atoms and R ^a _n Si (OR ^b ) _4-n (iii) (where n is 1, 2 or 3, and when n is 1, R is
^a represents a secondary or tertiary hydrocarbon group, and when n is 2 or 3, at least one R ^{a represents} a secondary or tertiary hydrocarbon group and the other is a hydrocarbon group, and R ^a may be the same or different, and R ^b has 1 to 1 carbon atoms.
In the hydrocarbon group of 4, when 4-n is 2 or 3, R ^b may be the same or different. In the presence of an olefin polymerization catalyst formed from the above), a solid titanium catalyst component (a) preferably containing [Ib] magnesium, titanium, halogen and an electron donor as essential components, and an organometallic catalyst component (b). A prepolymerization catalyst component obtained by prepolymerizing at least one olefin selected from the olefins represented by the following formulas (i) and (ii) in the presence of

[0057]

[Chemical 11]

[II] The organometallic catalyst component (b) and [II
I] Propylene in the presence of an olefin polymerization catalyst formed from a silicon compound (c) represented by the above formula (iii) or a compound (d) having two or more ether bonds existing through a plurality of atoms, And ethylene and carbon number 4
It can be produced by copolymerizing with one olefin selected from the group consisting of 20 to 20 olefins.

FIG. 1 shows the steps for preparing the olefin polymerization catalyst used for producing the propylene random copolymer used in the present invention. Each component forming the olefin polymerization catalyst used for producing the propylene random copolymer used in the present invention will be specifically described below.

The solid titanium catalyst component (a) which is the catalyst component [Ia] and the solid titanium catalyst component (a) used for preparing the prepolymerization catalyst component [Ib] are the following magnesium compounds and titanium compounds. And an electron donor.

Used to prepare solid titanium catalyst component (a)
Specific examples of the titanium compound include
The tetravalent titanium compound represented by Ti (OR)_gX_4-g (In the formula, R represents a hydrocarbon group, and X represents a halogen atom.
And g is 0 ≦ g ≦ 4. As such a titanium compound, specifically, TiCl
_Four, TiBr_Four, TiI_Four Tetrahalogenated titanium such as
Ti (OCH₃) Cl₃, Ti (OC₂H_Five) Cl₃,
Ti (On-C_FourH₉) Cl₃, Ti (OC₂H_Five) Br₃, T
i (O-iso-C_FourH₉) Br₃ Trihalogenated al such as
Coxitanium; Ti (OCH₃)₂Cl₂, Ti (OC₂H
_Five)₂Cl₂, Ti (On-C_FourH₉)₂Cl ₂, Ti (OC₂H
_Five)₂Br₂Dihalogenated dialkoxy titanium such as; T
i (OCH₃)₃Cl, Ti (OC₂H_Five)₃Cl, Ti
(On-C_FourH₉)₃Cl, Ti (OC₂H_Five)₃Such as Br
Trialkoxy titanium monohalide; Ti (OC
H₃)_Four, Ti (OC₂H_Five)_Four, Ti (On-C_FourH₉)_Four, T
i (O-iso-C_FourH₉)_Four, Ti (O-2-ethylhexyl)
_FourExamples of tetraalkoxy titanium etc.
it can.

Of these, halogen-containing titanium compounds are preferable, titanium tetrahalides are more preferable, and titanium tetrachloride is particularly preferable. These titanium compounds may be used alone or in combination of two or more. Further, these titanium compounds may be diluted with a hydrocarbon compound or a halogenated hydrocarbon compound.

Examples of the magnesium compound used for preparing the solid titanium catalyst component (a) include a magnesium compound having a reducing property and a magnesium compound having no reducing property.

Examples of the reducing magnesium compound include magnesium compounds having a magnesium-carbon bond or a magnesium-hydrogen bond. Specific examples of such a magnesium compound having a reducing property include dimethyl magnesium, diethyl magnesium, dipropyl magnesium,
Dibutyl magnesium, diamyl magnesium, dihexyl magnesium, didecyl magnesium, ethyl magnesium chloride, propyl magnesium chloride, butyl magnesium chloride, hexyl magnesium chloride, amyl magnesium chloride, butyl ethoxy magnesium, ethyl butyl magnesium, butyl magnesium hydride, etc. it can. These magnesium compounds may be used alone or may form a complex compound with an organic metal compound described later. Further, these magnesium compounds may be liquid, solid, or may be derived by reacting metallic magnesium with a corresponding compound. It can also be derived from metallic magnesium during catalyst preparation using the methods described above.

Specific examples of the non-reducing magnesium compound are magnesium halides such as magnesium chloride, magnesium bromide, magnesium iodide and magnesium fluoride; methoxy magnesium chloride.
Alkoxy magnesium halides such as ethoxy magnesium chloride, isopropoxy magnesium chloride, butoxy magnesium chloride, octoxy magnesium chloride;
Allyloxy magnesium halides such as phenoxy magnesium chloride, methylphenoxy magnesium chloride;
Ethoxymagnesium, isopropoxymagnesium,
Butoxy magnesium, n-octoxy magnesium, 2-
Examples thereof include alkoxy magnesium such as ethylhexoxy magnesium; phenoxy magnesium, allyloxy magnesium such as dimethylphenoxy magnesium; magnesium carboxylates such as magnesium laurate and magnesium stearate.

The non-reducing magnesium compound may be a compound derived from the above-mentioned reducing magnesium compound or a compound derived during preparation of the catalyst component. In order to derive a non-reducing magnesium compound from a reducing magnesium compound, for example, a reducing magnesium compound is used as a halogen, a polysiloxane compound, a halogen-containing silane compound, a halogen-containing aluminum compound, an alcohol, an ester. It may be contacted with a compound having an active carbon-oxygen bond, such as a ketone, an aldehyde or the like.

In the present invention, in addition to the above-mentioned reducing magnesium compound and non-reducing magnesium compound, the magnesium compound may be a complex compound, a complex compound or another compound of the above magnesium compound and another metal. It may be a mixture with a metal compound. Furthermore, you may use the said compound in combination of 2 or more types.

As the magnesium compound used for the preparation of the solid titanium catalyst component (a), many magnesium compounds other than those mentioned above can be used, but in the finally obtained solid titanium catalyst component (a), , Preferably in the form of a halogen-containing magnesium compound,
Therefore, when a halogen-free magnesium compound is used, it is preferable to react it with a halogen-containing compound during the preparation.

Among the above-mentioned magnesium compounds, magnesium compounds having no reducing property are preferable, halogen-containing magnesium compounds are more preferable, and magnesium chloride, alkoxy magnesium chloride and allyloxy magnesium chloride are particularly preferable.

The solid titanium catalyst component (a) used in the present invention is formed by bringing the above-mentioned magnesium compound into contact with the above-mentioned titanium compound and electron donor.

Specific examples of the electron donor used in the preparation of the solid titanium catalyst component (a) include the following compounds. Methylamine, ethylamine,
Dimethylamine, diethylamine, ethylenediamine,
Amines such as tetramethylenediamine, hexamethylenediamine, tributylamine, tribenzylamine;
Pyrroles such as pyrrole, methylpyrrole and dimethylpyrrole; pyrroline; pyrrolidine; indole; pyridine, methylpyridine, ethylpyridine, propylpyridine, dimethylpyridine, ethylmethylpyridine, trimethylpyridine, phenylpyridine, benzylpyridine,
Pyridines such as pyridine chloride; nitrogen-containing cyclic compounds such as piperidines, quinolines, isoquinolines; tetrahydrofuran, 1,4-cineole, 1,8-cineole, pinolfuran, methylfuran, dimethylfuran, diphenylfuran, benzofuran, Cyclic oxygen-containing compounds such as coumaran, phthalane, tetrahydropyran, pyran and ditedropyran; methanol, ethanol, propanol, pentanol, hexanol, octanol, 2-ethylhexanol, dodecanol, octadecyl alcohol,
C1-C18 alcohols such as oleyl alcohol, benzyl alcohol, phenylethyl alcohol, cumyl alcohol, isopropyl alcohol, isopropylbenzyl alcohol; phenol, cresol, xylenol, ethylphenol, propylphenol,
Nonylphenol, cumylphenol, naphthol, and other phenols having 6 to 20 carbon atoms which may have a lower alkyl group; acetone, methylethylketone, methylisobutylketone, acetophenone, benzophenone, acetylacetone, benzoquinone and the like having 3 to 15 carbon atoms Ketones; aldehydes having 2 to 15 carbon atoms such as acetaldehyde, propionaldehyde, octylaldehyde, benzaldehyde, tolualdehyde, naphthaldehyde; methyl formate, methyl acetate, ethyl acetate, vinyl acetate, propyl acetate, octyl acetate, cyclohexyl acetate, Ethyl propionate, methyl butyrate, ethyl valerate,
Methyl chloroacetate, ethyl dichloroacetate, methyl methacrylate, ethyl crotonate, ethyl cyclohexanecarboxylate, methyl benzoate, ethyl benzoate, propyl benzoate, butyl benzoate, octyl benzoate, cyclohexyl benzoate, phenyl benzoate, benzoate Acid benzyl, methyl toluate, ethyl toluate, amyl toluate, ethyl ethyl benzoate, methyl anisate, n-butyl maleate, diisobutyl methylmalonate, di-n-hexyl carboxylic acid cyclohexene, diethyl nadic acid, tetrahydrophthalic acid Diisopropyl, diethyl phthalate, diisobutyl phthalate, di-n-butyl phthalate,
Di2-ethylhexyl phthalate, γ-butyrolactone, δ-
C2-30 organic acid esters such as valerolactone, coumarin, phthalide, and ethyl carbonate; acid halides having 2 to 15 carbon atoms such as acetyl chloride, benzoyl chloride, toluic acid chloride, and anisic acid chloride; methyl ether, ethyl Ether, isopropyl ether,
Butyl ether, amyl ether, anisole, diphenyl ether epoxy-p-menthane, etc. with 2 to 2 carbon atoms
0 ethers; 2-isopentyl-2-isopropyl-1,3-
Dimethoxypropane, 2,2-diisobutyl-1,3-dimethoxypropane, 2,2-diisopropyl-1,3-dimethoxypropane, 2-cyclohexylmethyl-2-isopropyl-1,3-dimethoxypropane, 2,2-diisopentyl -1,3-dimethoxypropane, 2-isobutyl-2-isopropyl-1,3-dimethoxypropane, 2-cyclohexyl-2-isopropyl-1,3-
Dimethoxypropane, 2-cyclopentyl-2-isopropyl-1,3-dimethoxypropane, 2,2-dicyclopentyl-1,
3-dimethoxypropane, 1,2-bis-methoxymethyl-bicyclo- [2,2,1] -heptane, diphenyldimethoxysilane, isopropyl-t-butyldimethoxysilane, 2,2-diisobutyl-1,3-dimethoxycyclohexane Diethers such as 2-isopentyl-2-isopropyl-1,3-dimethoxycyclohexane and 9,9-dimethoxymethylfluorene; acid amides such as acetic acid amide, benzoic acid amide, toluic acid amide; acetonitrile, benzonitrile, tolunitrile Nitriles such as; acid anhydrides such as acetic anhydride, phthalic anhydride, benzoic anhydride, etc. are used.

As the electron donor, a silicon compound represented by the general formula (iii) described below can be used. When the titanium compound, the magnesium compound and the electron donor as described above are brought into contact with each other, the carrier compound as described below can be used to prepare the carrier-supported solid titanium catalyst component (a).

Examples of such carrier compounds include Al
₂ O ₃ , SiO ₂ , B ₂ O ₃ , MgO, CaO, TiO ₂ , Z
Examples thereof include resins such as nO, ZnO ₂ , SnO ₂ , BaO, ThO, and a styrene-divinylbenzene copolymer. Among these carrier compounds, SiO ₂ , Al ₂ O ₃ , MgO, ZnO, ZnO _{2 and the} like are preferable.

The above components may be contacted in the presence of other reaction agents such as silicon, phosphorus and aluminum. The solid titanium catalyst component (a) can be produced by bringing the above titanium compound, magnesium compound and electron donor into contact with each other, and any known method can be adopted. it can.

The specific production method of the solid titanium catalyst component (a) will be briefly described below by giving some examples. (1) A method in which a solution of a magnesium compound, an electron donor and a hydrocarbon solvent is contact-reacted with an organometallic compound to precipitate a solid, or while being precipitated, a titanium compound is contact-reacted.

(2) A method in which a complex consisting of a magnesium compound and an electron donor is subjected to a catalytic reaction with an organometallic compound and then a titanium compound is subjected to a catalytic reaction. (3) For the contact product between the inorganic carrier and the organic magnesium compound,
A method of catalytically reacting a titanium compound and preferably an electron donor. At this time, the contact product may be previously contact-reacted with a halogen-containing compound and / or an organometallic compound.

(4) A magnesium compound-supported inorganic or organic carrier is obtained from a mixture of a solution containing a magnesium compound, an electron donor, and optionally a hydrocarbon solvent, and an inorganic or organic carrier. How to contact.

(5) magnesium compound, titanium compound,
A method for obtaining a solid titanium catalyst component carrying magnesium and titanium by contacting a solution containing an electron donor, and optionally a hydrocarbon solvent, with an inorganic or organic carrier.

(6) A method in which an organomagnesium compound in a liquid state is subjected to a catalytic reaction with a halogen-containing titanium compound. At this time, the electron donor is used at least once. (7) A method of contacting a titanium compound after a liquid reaction of an organomagnesium compound with a halogen-containing compound.
At this time, the electron donor is used at least once.

(8) A method of catalytically reacting an alkoxy group-containing magnesium compound with a halogen-containing titanium compound. At this time, the electron donor is used at least once. (9) A method of reacting a complex of an alkoxy group-containing magnesium compound and an electron donor with a titanium compound.

(10) A method in which a complex comprising an alkoxy group-containing magnesium compound and an electron donor is contacted with an organometallic compound and then contacted with a titanium compound. (11) A method of contacting and reacting a magnesium compound, an electron donor, and a titanium compound in any order. In this reaction, each component may be pretreated with an electron donor and / or a reaction aid such as an organometallic compound or a halogen-containing silicon compound. In this method, it is preferable to use the electron donor at least once.

(12) A method of reacting a liquid magnesium compound having no reducing ability with a liquid titanium compound, preferably in the presence of an electron donor, to precipitate a solid magnesium-titanium complex.

(13) A method of further reacting the reaction product obtained in (12) with a titanium compound. (14) A method of further reacting the reaction product obtained in (11) or (12) with an electron donor and a titanium compound.

(15) A method of treating a solid substance obtained by pulverizing a magnesium compound, preferably an electron donor, and a titanium compound with any of halogen, a halogen compound and an aromatic hydrocarbon. In this method,
It may include a step of pulverizing only the magnesium compound, the complex compound consisting of the magnesium compound and the electron donor, or the magnesium compound and the titanium compound. Further, after pulverization, pretreatment with a reaction auxiliary agent and then treatment with halogen or the like may be performed. Examples of the reaction aid include organic metal compounds and halogen-containing silicon compounds.

(16) A method of pulverizing a magnesium compound and then contacting and reacting with the titanium compound. At this time, it is preferable to use an electron donor or a reaction aid during pulverization and / or contact / reaction.

(17) A method of treating the compound obtained in (11) to (16) above with halogen or a halogen compound or an aromatic hydrocarbon. (18) A method of bringing a contact reaction product of a metal oxide, an organomagnesium and a halogen-containing compound into contact with an electron donor and a titanium compound.

(19) A method of reacting a magnesium salt of an organic acid, a magnesium compound such as alkoxy magnesium, aryloxy magnesium and the like with a titanium compound and / or a halogen-containing hydrocarbon and preferably an electron donor.

(20) A method of bringing a hydrocarbon solution containing at least a magnesium compound and alkoxytitanium into contact with a titanium compound and / or an electron donor. At this time, it is preferable to coexist with a halogen-containing compound such as a halogen-containing silicon compound.

(21) A liquid magnesium compound having no reducing ability is reacted with an organometallic compound to precipitate a solid magnesium-metal (aluminum) complex,
Then, a method of reacting an electron donor and a titanium compound.

The amount of each of the above components used in preparing the solid titanium catalyst component (a) varies depending on the preparation method and cannot be specified unconditionally. For example, the amount of electron donor is 0.01 per mol of the magnesium compound. It is used in an amount of from 10 to 10 mol, preferably from 0.1 to 5 mol, and the titanium compound is from 0.01 to 1000 mol, preferably from 0.1 to 200 mol.
Used in molar amounts.

The solid titanium catalyst component (a) thus obtained contains magnesium, titanium, halogen and an electron donor as essential components. In this solid titanium catalyst component (a), the halogen / titanium (atomic ratio) is in the range of about 2-200, preferably about 4-100, and the electron donor / titanium (molar ratio) is about 0.0.
1-100, preferably in the range of about 0.2-10,
Desirably, the magnesium / titanium (atomic ratio) is in the range of about 1-100, preferably about 2-50.

Such solid titanium catalyst component (a)
(Catalyst component [Ia]) is a [Ib] prepolymerization catalyst component obtained by prepolymerizing an olefin in the presence of the solid titanium catalyst component (a) and the following organometallic catalyst component (b). It is desirable to use it for polymerization.

[Ib] As the organometallic catalyst component (b) used for preparing the prepolymerization catalyst component, an organometallic compound of Group I to Group III metal of the periodic table is used, and specifically, Compounds such as

(B-1) General formula R ¹ _m Al (OR ² ) _n H _p X _q (wherein R ¹ and R ² are usually 1 to 15 carbon atoms,
It is preferably a hydrocarbon group containing 1 to 4 groups, which may be the same or different. X represents a halogen atom, 0 <m ≦ 3, n is 0 ≦ n <3, p is 0 ≦ p <3, q
Is a number of 0 ≦ q <3, and m + n + p + q = 3).

[0095] (b-2) the general formula M ¹ AlR ¹ ₄ (wherein, M ¹ is Li, Na, shows a K, R ¹ is as defined above) and a group I metal and aluminum represented by Complex alkylated product.

(B-3) General formula R ¹ R ² M ² (wherein, R ¹ and R ² are the same as above, and M ² is M
group II or group represented by g, Zn or Cd)
Group III dialkyl compounds.

Examples of the organoaluminum compound belonging to the above (b-1) include the following compounds. A compound represented by the general formula R ¹ _m Al (OR ² ) _3-m (wherein R ¹ and R ² are the same as defined above, and m is preferably a number of 1.5 ≦ m ≦ 3). A compound represented by the general formula R ¹ _m AlX _3-m (wherein R ¹ is the same as defined above, X is halogen, and m is preferably 0 <m <3); ¹ _m AlH _3-m (wherein R ¹ is as defined above, and m is preferably 2 ≦
m <3), a compound represented by the general formula R ¹ _m Al (OR ² ) _n X _q (wherein R ¹ and R ² are the same as defined above, X is halogen, and 0 <m ≦ 3). , 0 ≦ n <3, 0 ≦ q <3, and m + n + q = 3).

Specific examples of the aluminum compound belonging to (b-1) include trialkyl aluminum such as triethyl aluminum and tributyl aluminum; trialkenyl aluminum such as triisoprenyl aluminum; diethyl aluminum ethoxide and dibutyl aluminum butoxide. Dialkyl aluminum alkoxides such as; ethyl aluminum sesquiethoxide,
Butyl aluminum sesquibutoxide and other alkyl aluminum sesquialkoxides; R ¹ _2.5 Al (OR ² )
Partially alkoxylated alkyl aluminum having an average composition represented by _0.5, etc .; Dialkyl aluminum halides such as diethyl aluminum chloride, dibutyl aluminum chloride, diethyl aluminum bromide; ethyl aluminum sesquichloride, butyl aluminum sesquichloride, ethyl aluminum sesqui Alkyl aluminum sesquihalides such as bromide;
Partially halogenated alkyl aluminum such as alkyl aluminum dihalide such as ethyl aluminum dichloride, propyl aluminum dichloride, butyl aluminum dibromide; Dialkyl aluminum hydride such as diethyl aluminum hydride, dibutyl aluminum hydride; ethyl aluminum dihydride, propyl aluminum Alkyl aluminum such as dihydride Other partially hydrogenated alkyl aluminum such as dihydride; Partially alkoxylated and halogenated alkyl aluminum such as ethyl aluminum ethoxy chloride, butyl aluminum butoxycyclolide, ethyl aluminum ethoxy bromide Can be mentioned.

Examples of the compound similar to (b-1) include an organoaluminum compound in which two or more aluminum atoms are bound via an oxygen atom or a nitrogen atom. Examples of such a compound include (C ₂ H ₅ ) ₂ AlO
Al (C ₂ H ₅ ) ₂ , (C ₄ H ₉ ) ₂ AlOAl (C ₄ H ₉ ) ₂
, (C ₂ H ₅ ) ₂ AlN (C ₂ H ₅ ) Al (C ₂ H ₅ ) _{2 and the} like, as well as aluminoxanes such as methylaluminoxane.

Compounds belonging to the above (b-2) include Li
Examples thereof include Al (C ₂ H ₅ ) ₄ and LiAl (C ₇ H ₁₅ ) ₄ .

Of these, organoaluminum compounds are preferably used, and halogen-containing alkylaluminum is particularly preferably used. [Ib] The olefin used for preparing the prepolymerization catalyst component is ethylene,
In addition to linear olefins such as propylene and butene, compounds represented by the above formula (i) or (ii) may be mentioned,
Specifically, 3-methyl-1-butene, 3-methyl-1-pentene,
3-ethyl-1-pentene, 4-methyl-1-pentene, 4-methyl
-1-hexene, 4,4-dimethyl-1-hexene, 4,4-dimethyl
-1-pentene, 4-ethyl-1-hexene, 3-ethyl-1-hexene, allylnaphthalene, allylnorbornane, styrene, dimethylstyrenes, vinylnaphthalenes, allyltoluenes, allylbenzene, vinylcyclohexane,
Examples include olefins having a branched structure such as vinylcyclopentane, vinylcycloheptane, and allyltrialkylsilanes. Among the compounds represented by the formula (i) or (ii), 3-methyl-1-butene, 3-methyl-1-pentene, 3-ethyl-1-hexene, vinylcyclohexane,
Allyltrimethylsilane, dimethylstyrene and the like are preferable, 3-methyl-1-butene, vinylcyclohexyne and allyltrimethylsilane are more preferable, and 3-methyl-1-butene is particularly preferable.

When the compound represented by the above formula (i) or (ii) is used as the olefin used for preparing the prepolymerization catalyst component, ethylene, propylene, 1-butene, 1-octene, 1-hexadecene, A linear olefin such as 1-eicosene can be used in combination.

In the prepolymerization, a catalyst having a much higher concentration than the catalyst concentration in the system in the main polymerization can be used.
The concentration of the solid titanium catalyst component (a) in the prepolymerization is usually about 0.01 to 200 mmol, preferably about 0.05 to 100 mmol, in terms of titanium atom, per liter of an inert hydrocarbon medium described later. It is desirable to be in the range.

The amount of the organometallic catalyst component (b) may be such that 0.1 to 1000 g, preferably 0.3 to 500 g of polymer is produced per 1 g of the solid titanium catalyst component (a). The amount is usually about 0.1 to 100 mmol, preferably about 0.5 to 50 mmol, per mol of titanium atom in the solid titanium catalyst component (a).

When carrying out the prepolymerization, an electron donor (e) may be used in addition to the solid titanium catalyst component (a) and the organometallic catalyst component (b). As the electron donor (e), specifically, the electron donor previously used in preparing the solid titanium catalyst component (a), the silicon compound (c) represented by the formula (iii) described later, and A compound (d) having two or more ether bonds existing through a plurality of atoms,
Further, an organic silicon compound represented by the following formula (ci) can be given.

R _n Si (OR ′) _4-n (ci) (wherein R and R ′ are hydrocarbon groups, and 0 <n <4
As the organosilicon compound represented by the general formula (ci), specifically, trimethylmethoxysilane, trimethylethoxysilane, dimethyldimethoxysilane,
Dimethyldiethoxysilane, diisopropyldimethoxysilane, diphenyldimethoxysilane, phenylmethyldimethoxysilane, diphenyldiethoxysilane, bis
o-tolyldimethoxysilane, bis-m-tolyldimethoxysilane, bis-p-tolyldimethoxysilane, bis-p-tolyldiethoxysilane, bisethylphenyldimethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, vinyltrimethoxysilane, methyl Trimethoxysilane, n-propyltriethoxysilane, decyltrimethoxysilane, decyltriethoxysilane, phenyltrimethoxysilane, γ-chloropropyltrimethoxysilane, methyltriethoxysilane, ethyltriethoxysilane, vinyltriethoxysilane, n -Butyltriethoxysilane, phenyltriethoxysilane, γ-aminopropyltriethoxysilane, chlorotriethoxysilane, ethyltriisopropoxysilane, vinyltributoxysilane, ethyl silicate, Lee butyl, trimethyl phenoxy silane, methyl tri Lilo carboxylate (Allyloxy) silane, vinyltris (beta-methoxyethoxy silane),
Examples thereof include vinyltriacetoxysilane and dimethyltetraethoxydisiloxane.

These electron donors (e) can be used alone or in combination of two or more. The electron donor (e) is 0.1 to 50 mol, preferably 0.5 to 30 mol, per 1 mol of titanium atom in the solid titanium catalyst component (a).
It is used in an amount of 1 mole, more preferably 1 to 20 moles.

The prepolymerization is preferably carried out under mild conditions by adding the olefin represented by the above formula (i) or (ii) and the above catalyst component to an inert hydrocarbon medium. Specific examples of the inert hydrocarbon medium used at this time include aliphatic hydrocarbons such as propane, butane, pentane, hexane, heptane, octane, decane, dodecane, and kerosene; cyclopentane, cyclohexane, methylcyclopentane, etc. Alicyclic hydrocarbons; aromatic hydrocarbons such as benzene, toluene and xylene; halogenated hydrocarbons such as ethylene chloride and chlorobenzene; and contact products thereof. Of these inert hydrocarbon media, it is particularly preferable to use aliphatic hydrocarbons.

The reaction temperature in the prepolymerization may be a temperature at which the resulting prepolymer is not substantially dissolved in the inert hydrocarbon medium, and is usually about -20 to + 100 ° C, preferably about-. 20 to + 80 ° C, more preferably 0 to +
It is preferably in the range of 40 ° C.

In the prepolymerization, a molecular weight modifier such as hydrogen can be used. Such a molecular weight modifier has an intrinsic viscosity [η] of a polymer obtained by prepolymerization measured in decalin at 135 ° C. of about 0.2 dl /
It is desirable to use it in an amount such that it is g or more, preferably about 0.5 to 10 dl / g.

It is desirable that the prepolymerization is carried out so that about 0.1 to 1000 g, preferably about 0.3 to 500 g of a polymer is produced per 1 g of the solid titanium catalyst component (a) as described above. If the prepolymerization amount is too large, the production efficiency of the copolymer in the main polymerization may be lowered, and fish eyes may be easily generated when a film or the like is formed from the obtained copolymer.

Such prepolymerization can be carried out batchwise or continuously. The olefin polymerization catalyst used for producing the propylene-based random copolymer used in the present invention is the solid titanium catalyst component [Ia] or [Ia] described above.
b] a prepolymerization catalyst component, [II] an organometallic catalyst component,
[III] Silicon compound (c) or compound (d) having two or more ether bonds existing through a plurality of atoms
It is formed from and.

As the [II] organometallic catalyst component, the same as the (b) organometallic catalyst component used in the preparation of the above-mentioned [Ib] prepolymerization catalyst component can be used.
The [III] silicon compound (c) is a compound represented by the following formula (iii).

[0114] In _{^{R a n -Si- (OR b)}} 4-n ... (iii) ( wherein, n is 1, 2 or 3, when n is 1, R
^a represents a secondary or tertiary hydrocarbon group, and when n is 2 or 3, at least one R ^{a represents} a secondary or tertiary hydrocarbon group, and the other represents a hydrocarbon group, R ^a may be the same or different, and R ^b has 1 to 1 carbon atoms.
In the hydrocarbon group of 4, when 4-n is 2 or 3, R ^b may be the same or different. ) In the silicon compound (c) represented by the formula (iii), 2
Examples of the primary or tertiary hydrocarbon group include a cyclopentyl group, a cyclopentenyl group, a cyclopentadienyl group, these groups having a substituent, or a hydrocarbon group in which carbon adjacent to Si is secondary or tertiary. To be More specifically, the substituted cyclopentyl group, 2-methylcyclopentyl group, 3-methylcyclopentyl group, 2-ethylcyclopentyl group, 2-n-butylcyclopentyl group, 2,3-dimethylcyclopentyl group, 2,4-dimethyl Cyclopentyl group, 2,5-dimethylcyclopentyl group, 2,3-diethylcyclopentyl group, 2,3,4-trimethylcyclopentyl group, 2,
Examples thereof include a cyclopentyl group having an alkyl group such as a 3,5-trimethylcyclopentyl group, a 2,3,4-triethylcyclopentyl group, a tetramethylcyclopentyl group, and a tetraethylcyclopentyl group.

The substituted cyclopentenyl group includes 2-methylcyclopentenyl group, 3-methylcyclopentenyl group,
2-ethylcyclopentenyl group, 2-n-butylcyclopentenyl group, 2,3-dimethylcyclopentenyl group, 2,4-dimethylcyclopentenyl group, 2,5-dimethylcyclopentenyl group, 2,3,4-trimethyl Examples include cyclopentenyl group, cyclopentenyl group having an alkyl group such as 2,3,5-trimethylcyclopentenyl group, 2,3,4-triethylcyclopentenyl group, tetramethylcyclopentenyl group, and tetraethylcyclopentenyl group. it can.

Examples of the substituted cyclopentadienyl group include 2-
Methylcyclopentadienyl group, 3-methylcyclopentadienyl group, 2-ethylcyclopentadienyl group, 2-n-butylcyclopentenyl group, 2,3-dimethylcyclopentadienyl group, 2,4-dimethyl Cyclopentadienyl group, 2,5-
Dimethylcyclopentadienyl group, 2,3-diethylcyclopentadienyl group, 2,3,4-trimethylcyclopentadienyl group, 2,3,5-trimethylcyclopentadienyl group, 2,
3,4-triethylcyclopentadienyl group, 2,3,4,5-tetramethylcyclopentadienyl group, 2,3,4,5-tetraethylcyclopentadienyl group, 1,2,3,4, Examples thereof include a cyclopentadienyl group having an alkyl group such as a 5-pentamethylcyclopentadienyl group and a 1,2,3,4,5-pentaethylcyclopentadienyl group.

Examples of the hydrocarbon group in which the carbon adjacent to Si is secondary carbon include i-propyl group, s-butyl group, s-amyl group and α-methylbenzyl group. Examples of the hydrocarbon group whose carbon adjacent to is a tertiary carbon include a t-butyl group, a t-amyl group, an α, α′-dimethylbenzyl group, and an admantyl group.

When n is 1, the silicon compound (c) represented by the formula (iii) is cyclopentyltrimethoxysilane, 2-methylcyclopentyltrimethoxysilane or 2,3-dimethylcyclopentyltrimethoxysilane. Silane, cyclopentyltriethoxysilane, iso-butyltriethoxysilane, t-butyltriethoxysilane,
Examples thereof include trialkoxysilanes such as cyclohexyltrimethoxysilane, cyclohexyltriethoxysilane, 2-norbornanetrimethoxysilane, and 2-norbornanetriethoxysilane.

When n is 2, dicyclopentyldiethoxysilane, t-butylmethyldimethoxysilane,
Examples of dialkoxysilanes include t-butylmethyldiethoxysilane, t-amylmethyldiethoxysilane, dicyclohexyldimethoxysilane, cyclohexylmethyldimethoxysilane, cyclohexylmethyldiethoxysilane, and 2-norbornanemethyldimethoxysilane.

When n is 2, the silicon compound (c) represented by the formula (iii) is preferably a dimethoxy compound represented by the following formula (iv).

[0121]

[Chemical 12]

In the formula, R ^a and R ^c are each independently a cyclopentyl group, a substituted cyclopentyl group, a cyclopentenyl group, a substituted cyclopentenyl group, a cyclopentadienyl group, a substituted cyclopentadienyl group, or
A hydrocarbon group in which the carbon adjacent to Si is secondary carbon or tertiary carbon is shown.

Examples of the silicon compound represented by the formula (iv) include dicyclopentyldimethoxysilane, dicyclopentenyldimethoxysilane, dicyclopentadienyldimethoxysilane, di-t-butyldimethoxysilane and di (2- Methylcyclopentyl) dimethoxysilane, di (3-methylcyclopentyl) dimethoxysilane, di (2-ethylcyclopentyl) dimethoxysilane,
Di (2,3-dimethylcyclopentyl) dimethoxysilane,
Di (2,4-dimethylcyclopentyl) dimethoxysilane,
Di (2,5-dimethylcyclopentyl) dimethoxysilane,
Di (2,3-diethylcyclopentyl) dimethoxysilane,
Di (2,3,4-trimethylcyclopentyl) dimethoxysilane, di (2,3,5-trimethylcyclopentyl) dimethoxysilane, di (2,3,4-triethylcyclopentyl) dimethoxysilane, di (tetramethylcyclopentyl) dimethoxysilane , Di (tetraethylcyclopentyl) dimethoxysilane, di (2-methylcyclopentenyl) dimethoxysilane, di (3-methylcyclopentenyl) dimethoxysilane, di (2-ethylcyclopentenyl) dimethoxysilane, di (2-n-butylcyclo) Pentenyl) dimethoxysilane, di (2,3-dimethylcyclopentenyl) dimethoxysilane, di (2,4-dimethylcyclopentenyl) dimethoxysilane, di (2,5-dimethylcyclopentenyl) dimethoxysilane, di (2,3, 4-trimethylcyclopentenyl)
Dimethoxysilane, di (2,3,5-trimethylcyclopentenyl) dimethoxysilane, di (2,3,4-triethylcyclopentenyl) dimethoxysilane, di (tetramethylcyclopentenyl) dimethoxysilane, di (tetraethylcyclopentenyl) dimethoxy Silane, di (2-methylcyclopentadienyl) dimethoxysilane, di (3-methylcyclopentadienyl) dimethoxysilane, di (2-ethylcyclopentadienyl) dimethoxysilane, di (2-n-butylcyclopentenyl) ) Dimethoxysilane, di (2,3-dimethylcyclopentadienyl) dimethoxysilane, di (2,4-dimethylcyclopentadienyl) dimethoxysilane, di (2,5-dimethylcyclopentadienyl) dimethoxysilane, di (2,3-diethylcyclopentadienyl) dimethoxysilane, di (2,3,4-trimethyl) Dicyclopentadienyl) dimethoxysilane, di (2,3,5-trimethylcyclopentadienyl) dimethoxysilane, di (2,3,4-triethylcyclopentadienyl) dimethoxysilane, di (2,3,4 , 5-Tetramethylcyclopentadienyl) dimethoxysilane, di (2,3,4,5-tetraethylcyclopentadienyl) dimethoxysilane, di (1,2,3,4,5-pentamethylcyclopentadienyl) ) Dimethoxysilane, di (1,2,
3,4,5-Pentaethylcyclopentadienyl) dimethoxysilane, di-t-amyl-dimethoxysilane, di (α, α'-dimethylbenzyl) dimethoxysilane, di (admantyl) dimethoxysilane, admantyl-t-butyldimethoxy Examples thereof include silane, cyclopentyl-t-butyldimethoxysilane, diisopropyldimethoxysilane, dis-butyldimethoxysilane, dis-amyldimethoxysilane, and isopropyl-s-butyldimethoxysilane.

When n is 3, tricyclopentylmethoxysilane, tricyclopentylethoxysilane, dicyclopentylmethylmethoxysilane, dicyclopentylethylmethoxysilane, dicyclopentylmethylethoxysilane, cyclopentyldimethylmethoxysilane, cyclopentyldiethylmethoxysilane, Examples include monoalkoxysilanes such as cyclopentyldimethylethoxysilane.

Of these, dimethoxysilanes, particularly dimethoxysilane represented by the formula (iv), are preferable, and specifically, dicyclopentyldimethoxysilane, di-t-butyldimethoxysilane, di (2-methylcyclopentyl) dimethoxysilane. , Di (3-methylcyclopentyl) dimethoxysilane and di-t-amyldimethoxysilane are preferable.

Two or more kinds of these silicon compounds (c) can be used in combination. In the compound (d) having two or more ether bonds existing via a plurality of atoms used in the present invention (hereinafter sometimes referred to as a polyether compound), the atoms existing between these ether bonds are carbon and silicon. , At least one selected from the group consisting of oxygen, sulfur, phosphorus, and boron, and the number of atoms is 2 or more. Of these, a relatively bulky substituent at an atom between ether bonds, specifically, a substituent having 2 or more carbon atoms, preferably 3 or more, having a linear, branched or cyclic structure, and more preferably a branched substituent. Those in which a substituent having a ring-like or cyclic structure is bonded are desirable. Further, a compound in which a plurality of carbon atoms, preferably 3 to 20, more preferably 3 to 10 and particularly preferably 3 to 7 carbon atoms are contained in an atom existing between two or more ether bonds is preferable.

As such a polyether compound,
For example, a compound represented by the following formula can be given.

[0128]

[Chemical 13]

In the formula, n is an integer of 2 ≦ n ≦ 10, and R
^{1 to} R ²⁶ are carbon, hydrogen, oxygen, halogen, nitrogen, sulfur,
At least one selected from phosphorus, boron and silicon
Represents a substituent having a seed elements, any R ¹ to R ^26, preferably R ¹ to R ^2n, may form a ring other than a benzene ring in cooperation, other than carbon atoms in the main chain Atoms may be included.

As the polyether compound as described above,
Specifically, 2- (2-ethylhexyl) -1,3-dimethoxypropane, 2-isopropyl-1,3-dimethoxypropane, 2
-Butyl-1,3-dimethoxypropane, 2-s-butyl-1,3-dimethoxypropane, 2-cyclohexyl-1,3-dimethoxypropane, 2-phenyl-1,3-dimethoxypropane, 2-cumyl-1 , 3-Dimethoxypropane, 2- (2-phenylethyl) -1,3-dimethoxypropane, 2- (2-cyclohexylethyl) -1,3-dimethoxypropane, 2- (p-chlorophenyl) -1,3- Dimethoxypropane, 2- (diphenylmethyl) -1,3-dimethoxypropane, 2- (1-naphthyl) -1,3-
Dimethoxypropane, 2- (2-fluorophenyl) -1,3-
Dimethoxypropane, 2- (1-decahydronaphthyl) -1,3
-Dimethoxypropane, 2- (pt-butylphenyl) -1,3-
Dimethoxypropane, 2,2-dicyclohexyl-1,3-dimethoxypropane, 2,2-dicyclopentyl-1,3-dimethoxypropane, 2,2-diethyl-1,3-dimethoxypropane,
2,2-dipropyl-1,3-dimethoxypropane, 2,2-diisopropyl-1,3-dimethoxypropane, 2,2-dibutyl-1,3-
Dimethoxypropane, 2-methyl-2-propyl-1,3-dimethoxypropane, 2-methyl-2-benzyl-1,3-dimethoxypropane, 2-methyl-2-ethyl-1,3-dimethoxypropane,
2-methyl-2-isopropyl-1,3-dimethoxypropane, 2-
Methyl-2-phenyl-1,3-dimethoxypropane, 2-methyl
-2-Cyclohexyl-1,3-dimethoxypropane, 2,2-bis (p-chlorophenyl) -1,3-dimethoxypropane, 2,2-
Bis (2-cyclohexylethyl) -1,3-dimethoxypropane, 2-methyl-2-isobutyl-1,3-dimethoxypropane, 2-methyl-2- (2-ethylhexyl) -1,3-dimethoxypropane, 2 , 2-Diisobutyl-1,3-dimethoxypropane, 2,2-diphenyl-1,3-dimethoxypropane, 2,2-dibenzyl-1,3-dimethoxypropane, 2,2-bis (cyclohexylmethyl) -1, 3-dimethoxypropane, 2,2-diisobutyl-1,3-diethoxypropane, 2,2-diisobutyl-
1,3-dibutoxypropane, 2-isobutyl-2-isopropyl-1,3-dimethoxypropane, 2- (1-methylbutyl) -2-
Isopropyl-1,3-dimethoxypropane, 2- (1-methylbutyl) -2-s-butyl-1,3-dimethoxypropane, 2,2-di
-s-butyl-1,3-dimethoxypropane, 2,2-di-t-butyl-1,3-dimethoxypropane, 2,2-dineopentyl-1,3-
Dimethoxypropane, 2-isopropyl-2-isopentyl-
1,3-dimethoxypropane, 2-phenyl-2-isopropyl-
1,3-dimethoxypropane, 2-phenyl-2-s-butyl-1,3-
Dimethoxypropane, 2-benzyl-2-isopropyl-1,3-
Dimethoxypropane, 2-benzyl-2-s-butyl-1,3-dimethoxypropane, 2-phenyl-2-benzyl-1,3-dimethoxypropane, 2-cyclopentyl-2-isopropyl-1,3-dimethoxypropane, 2-Cyclopentyl-2-s-butyl-1,3-
Dimethoxypropane, 2-cyclohexyl-2-isopropyl-1,3-dimethoxypropane, 2-cyclohexyl-2-s-butyl-1,3-dimethoxypropane, 2-isopropyl-2-s-butyl-1,3-dimethoxy Propane, 2-cyclohexyl-2-cyclohexylmethyl-1,3-dimethoxypropane, 9,9-dimethoxymethylfluorene, 2,3-diphenyl-1,4-diethoxybutane, 2,3-dicyclohexyl-1,4- Diethoxybutane, 2,2-dibenzyl-1,4-diethoxybutane, 2,3-
Dicyclohexyl-1,4-diethoxybutane, 2,3-diisopropyl-1,4-diethoxybutane, 2,2-bis (p-methylphenyl) -1,4-dimethoxybutane, 2,3-bis (p -Chlorophenyl) -1,4-dimethoxybutane, 2,3-bis (p-fluorophenyl) -1,4-dimethoxybutane, 2,4-diphenyl-1,5-dimethoxypentane, 2,5-diphenyl-1 , 5-Dimethoxyhexane, 2,4-diisopropyl-1,5-dimethoxypentane, 2,4-diisobutyl-1,5-dimethoxypentane, 2,4-diisoamyl-1,5-dimethoxypentane, 3-methoxymethyltetrahydrofuran , 3-methoxymethyldioxane, 1,3-diisobutoxypropane, 1,2-diisobutoxypropane, 1,2-diisobutoxyethane, 1,3-diisoamyloxypropane, 1,3-diisoneopentyloxy Ethane, 1,3-dineopentyloxypropane, 2,2-tetramethylene-1,3-dimetho Shipuropan, 2,2-pentamethylene -
1,3-dimethoxypropane, 2,2-hexamethylene-1,3-dimethoxypropane, 1,2-bis (methoxymethyl) cyclohexane, 2,8-dioxaspiro [5,5] undecane, 3,7
-Dioxabicyclo [3,3,1] nonane, 3,7-dioxabicyclo [3,3,0] octane, 3,3-diisobutyl-1,5-oxononane, 6,6-diisobutyldioxyheptane, 1,1-dimethoxymethylcyclopentane, 1,1-bis (dimethoxymethyl) cyclohexane, 1,1-bis (methoxymethyl) bicyclo [2,2,1] heptane, 1,1-dimethoxymethylcyclopentane, 2- Methyl-2-methoxymethyl-1,3-dimethoxypropane, 2-cyclohexyl-2-ethoxymethyl-1,3-
Diethoxypropane, 2-cyclohexyl-2-methoxymethyl-1,3-dimethoxypropane, 2,2-diisobutyl-1,3-
Dimethoxycyclohexane, 2-isopropyl-2-isoamyl-1,3-dimethoxycyclohexane, 2-cyclohexyl-2-methoxymethyl-1,3-dimethoxycyclohexane,
2-isopropyl-2-methoxymethyl-1,3-dimethoxycyclohexane, 2-isobutyl-2-methoxymethyl-1,3-dimethoxycyclohexane, 2-cyclohexyl-2-ethoxymethyl-1,3-diethoxycyclohexane, 2 -Cyclohexyl-2-ethoxymethyl-1,3-dimethoxycyclohexane, 2-isopropyl-2-ethoxymethyl-1,3-diethoxycyclohexane, 2-isopropyl-2-ethoxymethyl-1,
3-dimethoxycyclohexane, 2-isobutyl-2-ethoxymethyl-1,3-diethoxycyclohexane, 2-isobutyl-2-ethoxymethyl-1,3-dimethoxycyclohexane,
Tris (p-methoxyphenyl) phosphine, methylphenylbis (methoxymethyl) silane, diphenylbis (methoxymethyl) silane, methylcyclohexylbis (methoxymethyl) silane, di-t-butylbis (methoxymethyl) silane, cyclohexyl-t- Butylbis (methoxymethyl) silane, i-propyl-t-butylbis (methoxymethyl) silane and the like can be mentioned.

Of these, 1,3-diethers are preferably used, and particularly 2,2-diisobutyl-1,3-dimethoxypropane, 2-isopropyl-2-isopentyl-1,3-dimethoxypropane, 2,2-diisobutyl-1,3-dimethoxypropane 2-dicyclohexyl-1,3-dimethoxypropane, 2,2-bis (cyclohexylmethyl) -1,3-dimethoxypropane and 9,9-dimethoxymethylfluorene are preferably used.

These polyether compounds (d) can be used in combination of two or more kinds. Next, a method for producing the propylene random copolymer used in the present invention will be described.

The propylene random copolymer used in the present invention comprises the solid titanium catalyst component [Ia] and
In the presence of an olefin polymerization catalyst formed from [II] an organometallic catalyst component and [III] a silicon compound (c) or a polyether compound (d) represented by the above formula (iii),
Preferably, the above-mentioned [Ib] prepolymerization catalyst component and [II]
In the presence of an olefin polymerization catalyst formed from an organometallic catalyst component and [III] the silicon compound (c) or the polyether compound (d) represented by the above formula (iii), propylene, ethylene and C 4 It can be obtained by performing copolymerization (main polymerization) with at least one olefin selected from olefins of 20 to 20.

Specific examples of the olefin having 4 to 20 carbon atoms used for copolymerization with propylene include 1-butene and 1-butene.
Pentene, 1-hexene, 4-methyl-1-pentene, 3-methyl-1-pentene, 1-octene, 3-methyl-1-butene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene,
1-octadecene, 1-eicosene, cyclopentene, cycloheptene, norbornene, 5-ethyl-2-norbornene, tetracyclododecene, 2-ethyl-1,4,5,8-dimethano-1,2,3,4,4a Examples include 5,5,8,8a-octahydronaphthalene.

These olefins and olefins selected from olefins having 4 to 20 carbon atoms can be used alone or in combination. In the present invention, the polymerization reaction is usually carried out in a gas phase or a liquid phase.

When the polymerization takes the reaction form of slurry polymerization or solution polymerization, an inert hydrocarbon similar to the inert hydrocarbon used in the preparation of the above-mentioned [Ib] prepolymerization catalyst component is used as a reaction solvent. be able to.

In the polymerization system, the above-mentioned [Ia] solid titanium catalyst component or [Ib] prepolymerization catalyst component is the titanium atom in the [Ia] solid titanium catalyst component or [Ib] prepolymer per 1 liter of polymerization volume. It is generally used in an amount of about 0.0001 to 50 mmol, preferably about 0.001 to 10 mmol, calculated as titanium atoms in the polymerization catalyst component. In the [II] organometallic catalyst component, the metal atom contained in the [II] organometallic catalyst component is usually about 1 to 2000 mol, preferably about 2 to 500 mol, relative to 1 mol of the titanium atom in the polymerization system. Used in such an amount that Further, the [III] silicon compound (c) or the polyether compound (d) is usually about 0.001 to 50 mol, preferably about 0.01 to 20 mol, per 1 mol of the metal atom in the [II] organometallic catalyst component. It is used in a molar amount.

At the time of polymerization, the electron donor used when preparing the solid titanium catalyst component (a) and / or the organosilicon compound represented by the above formula (ci) may be used in combination.

When hydrogen is used during the polymerization, a propylene-based random copolymer having a high melt flow rate is obtained,
The molecular weight of the propylene random copolymer obtained can be adjusted by adjusting the hydrogenation amount. Also in this case, in the present invention, the crystallinity and stereoregularity index of the propylene random copolymer obtained do not decrease, and the catalytic activity does not decrease.

The polymerization temperature is usually about -50 to 200 ° C,
It is preferably about 20 to 100 ° C., and the polymerization pressure is usually atmospheric pressure to 100 kg / cm ² , preferably about 2 to 50.
It is set to kg / cm ² .

Polymerization can be carried out by any of batch, semi-continuous and continuous methods. It is also possible to perform the reaction in two or more steps by changing the reaction conditions. in this case,
It is carried out in a gas phase or a liquid phase using 2 to 10 polymerization vessels.

In the propylene random copolymer obtained as described above, the constitutional unit derived from propylene is 80 to 99 mol%, preferably 85 to 98 mol%,
More preferably, it is contained in a proportion of 87 to 97 mol%, and the structural unit derived from an olefin selected from ethylene and an olefin having 4 to 20 carbon atoms is 20 to 1 mol%, preferably 15 to 2 mol%. Preferably 13-
It is desirable that the content is 3 mol%.

The propylene random copolymer has a very small amount of amorphous components and therefore a small amount of hydrocarbon soluble components, and the film formed from the propylene random copolymer has a low surface tackiness.

During polymerization, a small amount of a diene compound is added to the polymerization system in addition to propylene and at least one olefin selected from the above-mentioned ethylene and olefins having 4 to 20 carbon atoms to obtain a propylene random copolymer obtained. A constitutional unit derived from a diene compound may be introduced into the polymer.

As the diene compound, 1,3-butadiene,
1,3-pentadiene, 1,4-pentadiene, 1,3-hexadiene, 1,4-hexadiene, 1,5-hexadiene, 4-methyl-
1,4-hexadiene, 5-methyl-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, 6-methyl-1,6-decadiene, 7-methyl-1,6-decadiene, 6-methyl-1,6-undecadiene, Diene compounds having 4 to 20 carbon atoms such as 1,7-octadiene, 1,9-decadiene, isoprene, butadiene, ethylidene norbornene, vinyl norbornene and dicyclopentadiene, aromatic vinyl compounds such as styrene and allylbenzene, vinylcyclohexane Alicyclic vinyl compounds such as 1,4-hexadiene, 1,5-hexadiene, 4-methyl-1,4
-Hexadiene, 5-methyl-1,4-hexadiene, 7-methyl
It is preferable to use a diene compound having 5 to 12 carbon atoms such as -1,6-octadiene, ethylidene norbornene and vinyl norbornene.

When the propylene-based random copolymer is produced in this manner, the yield of the propylene-based random copolymer per unit amount of the solid catalyst component can be increased. The content of catalyst residues, especially halogen, can be reduced relatively. Therefore, it is possible to omit the operation of removing the catalyst in the propylene-based random copolymer, it is possible to effectively prevent the rusting of the mold when molding a molded product using the obtained propylene-based random copolymer be able to.

The propylene random copolymer used in the present invention may contain a nucleating agent as described below. By blending the core material with the propylene-based random copolymer, the crystal grains can be made finer, the crystallization speed can be improved, and high-speed molding can be performed.

As the nucleating agent, various conventionally known nucleating agents can be used without particular limitation. Among them, as preferable nucleating agents, the following nucleating agents can be exemplified.

[0149]

Embedded image

(In the formula, R ¹ represents an oxygen atom, a sulfur atom or a hydrocarbon group having 1 to 10 carbon atoms, and R ² and R ³ represent a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms. R ² and R ³ may be the same or different and R ² may be R ² , R ³ or R ² and R ³ may be bonded to form a ring, and M is 1 ~ Represents a trivalent metal atom, and n is an integer of 1 to 3.) Specifically, sodium-2,2'-methylene-bis (4,6-di-
t-Butylphenyl) phosphate, sodium-2,2'-
Ethylidene-bis (4,6-di-t-butylphenyl) phosphate, lithium-2,2'-methylene-bis- (4,6-di-t-butylphenyl) phosphate, lithium-2,2 ' -Ethylidene-bis (4,6-di-t-butylphenyl) phosphate, sodium-2,2'-ethylidene-bis (4-i-propyl-
6-t-Butylphenyl) phosphate, lithium-2,2'-
Methylene-bis (4-methyl-6-t-butylphenyl) phosphate, lithium-2,2'-methylene-bis (4-ethyl-6-
t-Butylphenyl) phosphate, calcium-bis [2,2'-thiobis (4-methyl-6-t-butylphenyl) phosphate], calcium-bis [2,2'-thiobis (4-ethyl-6) -t-butylphenyl) phosphate], calcium-bis [2,2'-thiobis- (4,6-di-t-butylphenyl) phosphate], magnesium-bis [2,2'-thiobis (4, 6-di-t-butylphenyl) phosphate],
Magnesium-bis [2,2'-thiobis- (4-t-octylphenyl) phosphate], sodium-2,2'-butylidene-bis (4,6-di-methylphenyl) phosphate, sodium-2, 2'-butylidene-bis (4,6-di-t-butylphenyl) phosphate, sodium-2,2'-t-octylmethylene-bis (4,6-di-methylphenyl) phosphate, sodium-2 , 2'-t-octylmethylene-bis (4,6-
Di-t-butylphenyl) phosphate, calcium-
Bis- (2,2'-methylene-bis (4,6-di-t-butylphenyl) phosphate), magnesium-bis [2,2'-methylene-bis (4,6-di-t-butylphenyl) ) Phosphate], barium-bis [2,2'-methylene-bis (4,6-di-t-
Butylphenyl) phosphate], sodium-2,2'-
Methylene-bis (4-methyl-6-t-butylphenyl) phosphate, sodium-2,2'-methylene-bis (4-ethyl-
6-t-Butylphenyl) phosphate, sodium (4,
4'-dimethyl-5,6'-di-t-butyl-2,2'-biphenyl) phosphate, calcium-bis [(4,4'-dimethyl-6,6'-
Di-t-butyl-2,2'-biphenyl) phosphate], sodium-2,2'-ethylidene-bis (4-m-butyl-6-t-butylphenyl) phosphate, sodium-2,2 ' -Methylene-bis (4,6-di-methylphenyl) phosphate, sodium-2,2'-methylene-bis (4,6-di-ethylphenyl) phosphate, potassium-2,2'-ethylidene-bis (4,6-Di-t-butylphenyl) phosphate, calcium-bis [2,2'-ethylidene-bis (4,6-di-t-butylphenyl) phosphate], magnesium-bis [2,2 ' -
Ethylidene-bis (4,6-di-t-butylphenyl) phosphate], barium-bis [2,2'-ethylidene-bis (4,6
-Di-t-butylphenyl) phosphate], aluminum-tris [2,2'-methylene-bis (4,6-di-t-butylfel) phosphate] and aluminum-tris [2,
2′-Ethylidene-bis (4,6-di-t-butylphenyl) phosphate] and mixtures of two or more thereof. Particularly preferred is sodium-2,2'-methylene-bis (4,6-di-t-butylphenyl) phosphate.

[0151]

[Chemical 15]

(In the formula, R ⁴ represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, M represents a metal atom having a valence of 1 to 3, and n is an integer of 1 to 3.) Specifically, sodium-bis (4-t-butylphenyl)
Phosphate, sodium-bis (4-methylphenyl) phosphate, sodium-bis (4-ethylphenyl) phosphate, sodium-bis (4-i-propylphenyl) phosphate, sodium-bis (4-t-
Octylphenyl) phosphate, potassium-bis (4
-t-Butylphenyl) phosphate, calcium-bis (4-t-butylphenyl) phosphate, magnesium
-Bis (4-t-butylphenyl) phosphate, lithium-bis (4-t-butylphenyl) phosphate, aluminum-bis (4-t-butylphenyl) phosphate and mixtures of two or more thereof can do. Particularly, sodium-bis (4-t-butylphenyl) phosphate is preferable.

[0153]

Embedded image

(In the formula, R ⁵ represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms.) Specifically, 1,3,2,4-dibenzylidene sorbitol, 1,
3-benzylidene-2,4-p-methylbenzylidene sorbitol, 1,3-benzylidene-2,4-p-ethylbenzylidene sorbitol, 1,3-p-methylbenzylidene-2,4-benzylidene sorbitol, 1,3- p-Ethylbenzylidene-2,4-benzylidene sorbitol, 1,3-p-methylbenzylidene-2,4
-p-ethylbenzylidene sorbitol, 1,3-p-ethylbenzylidene-2,4-p-methylbenzylidene sorbitol,
1,3,2,4-di (p-methylbenzylidene) sorbitol, 1,
3,2,4-di (p-ethylbenzylidene) sorbitol, 1,3,
2,4-di (pn-propylbenzylidene) sorbitol, 1,
3,2,4-di (pi-propylbenzylidene) sorbitol,
1,3,2,4-di (pn-butylbenzylidene) sorbitol,
1,3,2,4-di (ps-butylbenzylidene) sorbitol,
1,3,2,4-di (pt-butylbenzylidene) sorbitol,
1,3,2,4-di (2 ', 4'-dimethylbenzylidene) sorbitol, 1,3,2,4-di (p-methoxybenzylidene) sorbitol, 1,3,2,4-di (p- Ethoxybenzylidene) sorbitol, 1,3-benzylidene-2-4-p-chlorobenzylidene sorbitol, 1,3-p-chlorobenzylidene-2,4-benzylidene sorbitol, 1,3-p-chlorobenzylidene-2,4- p-methylbenzylidene sorbitol, 1,3-p-chlorobenzylidene-2,4-p-ethylbenzylidene sorbitol, 1,3-p-
Methylbenzylidene-2,4-p-chlorobenzylidene sorbitol, 1,3-p-ethylbenzylidene-2,4-p-chlorobenzylidene sorbitol and 1,3,2,4-di (p-chlorobenzylidene) sorbitol and these And a mixture of two or more of 1,3,2,4-dibenzylidene sorbitol, 1,3,2,4-di (p-methylbenzylidene) sorbitol, 1,3,2,4-di ( p-Ethylbenzylidene) sorbitol, 1,3-p-chlorobenzylidene-2,4-p-methylbenzylidenesorbitol, 1,3,2,4-di (p-chlorobenzylidene) sorbitol and mixtures of two or more thereof Is preferred.

Examples of the other nucleating agent include metal salts of aromatic carboxylic acids and aliphatic carboxylic acids.
Aluminum benzoate, aluminum pt-butylbenzoate, sodium adipate, sodium thiophenecarboxylate, sodium pyrrolecarboxylate and the like can be mentioned.

Inorganic compounds such as talc described later can also be exemplified. In the propylene random copolymer used in the present invention, the nucleating agent is 0.0 based on 100 parts by weight of the propylene random copolymer.
It is desirable that it is blended in a proportion of 01 to 10 parts by weight, preferably 0.01 to 5 parts by weight, particularly preferably 0.1 to 3 parts by weight. By blending the nucleating agent in the propylene-based random copolymer in the above amount, without impairing the excellent properties that the propylene-based random copolymer originally has,
A propylene-based random copolymer having fine crystal particles and improved crystallinity can be obtained.

Next, the propylene random copolymer composition according to the present invention will be described. The propylene random copolymer composition according to the present invention comprises: (A) a propylene random copolymer as described above; (B) (B-1) a phenolic stabilizer (B-2) an organic phosphite system. Stabilizer (B-3) Thioether stabilizer (B-4) Hindered amine stabilizer (B-5) At least one compound selected from the group consisting of metal salts of higher fatty acids: the above propylene random copolymer (A ) 0.001 to 10 parts by weight, preferably 0.005, relative to 100 parts by weight
.About.5 parts by weight, and more preferably 0.005 to 2 parts by weight.

More specifically, (1) (A) a propylene random copolymer and (B)
Phenolic stabilizer (B-1): 0.001-1 based on 100 parts by weight of the propylene random copolymer (A).
0 parts by weight, preferably 0.005 to 5 parts by weight, more preferably 0.005 to 2 parts by weight, or (2) (A) a propylene random copolymer and (B)
Phenolic stabilizer (B-1): 0.001-1 based on 100 parts by weight of the propylene random copolymer (A).
0 parts by weight, preferably 0.005 to 5 parts by weight, more preferably 0.005 to 2 parts by weight, and (C) (B-2) organic phosphite stabilizer (B-3) thioether stabilizer ( B-4) Hindered amine stabilizer (B-5) At least one compound selected from the group consisting of metal salts of higher fatty acids: 0.001 to 100 parts by weight of the propylene random copolymer (A) 10 parts by weight, preferably 0.005
˜5 parts by weight, more preferably 0.005 to 2 parts by weight, or (3) (A) a propylene random copolymer and (B)
Organic phosphite stabilizer (B-2): 0.0 based on 100 parts by weight of the propylene random copolymer (A).
01 to 10 parts by weight, preferably 0.005 to 5 parts by weight,
More preferably, it is formed from 0.005 to 2 parts by weight, or (4) (A) a propylene random copolymer and (B).
Organic phosphite stabilizer (B-2): 0.0 based on 100 parts by weight of the propylene random copolymer (A).
01 to 10 parts by weight, preferably 0.005 to 5 parts by weight,
More preferably, at least 0.005 to 2 parts by weight and at least one selected from the group consisting of (C) (B-3) thioether stabilizer (B-4) hindered amine stabilizer (B-5) metal salt of higher fatty acid One compound: 0.001 to 10 parts by weight, preferably 0.005, relative to 100 parts by weight of the propylene random copolymer (A).
~ 5 parts by weight, more preferably 0.005 to 2 parts by weight, or (5) (A) a propylene random copolymer and (B)
Thioether stabilizer (B-3): 0.001 to 100 parts by weight of the propylene random copolymer (A).
10 parts by weight, preferably 0.005 to 5 parts by weight, more preferably 0.005 to 2 parts by weight, or (6) (A) a propylene-based random copolymer, and (B)
Thioether stabilizer (B-3): 0.001 to 100 parts by weight of the propylene random copolymer (A).
10 parts by weight, preferably 0.005 to 5 parts by weight, more preferably 0.005 to 2 parts by weight, and (C) (B-4) hindered amine stabilizer (B-5) metal salt of higher fatty acid. At least one compound selected from the group: 0.001 to 10 parts by weight, preferably 0.005 parts by weight, relative to 100 parts by weight of the propylene random copolymer (A).
To (5) parts by weight, more preferably 0.005 to 2 parts by weight, or (7) (A) a propylene-based random copolymer and (B).
Hindered amine stabilizer (B-4): 0.00 based on 100 parts by weight of the propylene random copolymer (A).
1 to 10 parts by weight, preferably 0.005 to 5 parts by weight, more preferably 0.005 to 2 parts by weight, or (8) (A) a propylene random copolymer, and (B)
Hindered amine stabilizer (B-4): 0.00 based on 100 parts by weight of the propylene random copolymer (A).
1 to 10 parts by weight, preferably 0.005 to 5 parts by weight, more preferably 0.005 to 2 parts by weight, and at least one selected from the group consisting of (C) (B-5) metal salt of higher fatty acid Compound: 0.001 to 10 parts by weight, preferably 0.005, relative to 100 parts by weight of the propylene random copolymer (A).
To 5 parts by weight, more preferably 0.005 to 2 parts by weight, or (9) (A) a propylene-based random copolymer, and (B)
Metal salt of higher fatty acid (B-5): 0.001-1 with respect to 100 parts by weight of the propylene random copolymer (A).
0 parts by weight, preferably 0.005 to 5 parts by weight, and more preferably 0.005 to 2 parts by weight.

At least 1 selected from (B-1) to (B-5)
When the content of the seed compound (B) is within the above range relative to 100 parts by weight of the propylene-based random copolymer (A), the effect of improving heat resistance is high and the cost of the stabilizer is high. The cost is kept low, and the properties of the propylene random copolymer, such as tensile strength, are not deteriorated.

When the content of the metal salt of higher fatty acid (B-5) is within the above range, residual chlorine derived from the catalyst in the propylene random copolymer can be sufficiently absorbed. The properties of the propylene random copolymer are not deteriorated.

When two or more stabilizers are used in the present invention, it is preferable to use the following types and amounts. (B-1) Phenolic stabilizer: 0.005 to 2 parts by weight (B-2) Organic phosphite stabilizer: 0.005 to 2 relative to 100 parts by weight of the propylene random copolymer (A) Parts by weight (B-3) thioether stabilizer: 0.005 to 2 parts by weight (B-4) hindered amine stabilizer: 0.005 to 2 parts by weight (B-5) metal salt of higher fatty acid: 0.005 ˜2 parts by weight With respect to 100 parts by weight of the propylene random copolymer (A), (B-2) an organic phosphite stabilizer: 0.005 to 2 parts by weight (B-3) a thioether stabilizer: 0 0.005 to 2 parts by weight (B-4) Hindered amine stabilizer: 0.005 to 2 parts by weight (B-5) Metal salt of higher fatty acid: 0.005 to 2 parts by weight Propylene random copolymer (A) (B-3) thioether stabilizer: 0.005 to 2 parts by weight (B-4) hinder to 100 parts by weight Doamine-based stabilizer: 0.005 to 2 parts by weight (B-5) Metal salt of higher fatty acid: 0.005 to 2 parts by weight With respect to 100 parts by weight of the propylene-based random copolymer (A), (B-4 ) Hindered amine stabilizer: 0.005 to 2 parts by weight (B-5) Metal salt of higher fatty acid: 0.005 to 2 parts by weight Hereinafter, used in the present invention (B-1) Phenol stabilizer, (B
-2) Organic phosphite stabilizer, (B-3) thioether stabilizer, (B-4) hindered amine stabilizer and (B-
5) The metal salts of higher fatty acids will be sequentially explained.

(B-1) Phenol-based Stabilizer As the phenol-based compound, conventionally known compounds are used without particular limitation, and specifically, the following compounds are used.

2,6-di-t-butyl-4-methylphenol, 2,
6-di-t-butyl-4-ethylphenol, 2,6-dicyclohexyl-4-methylphenol, 2,6-diisopropyl-4-ethylphenol, 2,6-di-t-amyl-4-methylphenol,
2,6-di-t-octyl-4-n-propylphenol, 2,6-dicyclohexyl-4-n-octylphenol, 2-isopropyl-4-methyl-6-t-butylphenol, 2-t-butyl-2 -Ethyl-6-t-octylphenol, 2-isobutyl-4-ethyl
-6-t-hexylphenol, 2-cyclohexyl-4-n-butyl-6-isopropylphenol, dl-α-tocopherol, t-butylhydroquinone, 2,2'-methylenebis (4-methyl-6-t-butylphenol) ), 4,4'-butylidene bis (3-methyl-6-t-butylphenol), 4,4'-thiobis (3-methyl-6-t-butylphenol), 2,2-thiobis (4
-Methyl-6-t-butylphenol), 4,4'-methylenebis (2,6-di-t-butylphenol), 2,2'-methylenebis [6- (1-methylcyclohexyl) -p-cresol], 2 ,
2'-ethylidene bis (2,4-di-t-butylphenol), 2,
2'-butylidene bis (2-t-butyl-4-methylphenol), 1,1,3-tris (2-methyl-4-hydroxy-5-t-butylphenyl) butane, triethylene glycol-bis [3
-(3-t-Butyl-5-methyl-4-hydroxyphenyl) propionate], 1,6-hexanediol-bis [3- (3,5-
Di-t-butyl-4-hydroxyphenyl) propionate], 2,2-thiodiethylenebis [3- (3,5-di-t-butyl-
4-Hydroxyphenyl) propionate], N, N'-hexamethylenebis (3,5-di-t-butyl-4-hydroxy-hydrocinnamide), 3,5-di-t-butyl-4-hydroxybenzylphosphonate- Diethyl ester, 1,3,5-tris (2,6
-Dimethyl-3-hydroxy-4-t-butylbenzyl) isocyanurate, 1,3,5-tris [(3,5-di-t-butyl-4-hydroxyphenyl) propionyloxyethyl] isocyanurate, tris ( 4-t-butyl-2,6-dimethyl-3-hydroxybenzyl) isocyanurate, 2,4-bis (n-octylthio) -6- (4-hydroxy-3,5-di-t-butylanilino) -1 , 3,5-triazine, tetrakis [methylene-3- (3,
5-di-t-butyl-4-hydroxyphenyl) propionate] methane, bis (3,5-di-t-butyl-4-hydroxybenzylphosphonate ethyl) calcium, bis (3,5-di-t-
Butyl-4-hydroxybenzylphosphonate ethyl) nickel, bis [3,3-bis (3-t-4-hydroxyphenyl) butyric acid] glycol ester, N, N'-bis [3,5
-Di-t-butyl-4-hydroxyphenyl) propionyl]
Hydrazine), 2,2'-Ogizamide bis [ethyl-3- (3,5-
Di-t-butyl-4-hydroxyphenyl) propionate], 2,2'-methylenebis (4-methyl-6-t-butylphenol) terephthalate, 1,3,5-trimethyl-2,4,6-tris (3 , 5-Di-t-butyl-4-hydroxybenzyl) benzene, 3,9-bis [1,1-dimethyl-2-{-(3-t-butyl-4-hydroxy-5-methylphenyl) propionyloxy } Ethyl] -2,4,8,10-tetraoxaspiro [5,5] undecane, 2,2-bis [4- (2- (3,5-di-t-butyl-4-hydroxyhydrocinnamoyl] (Oxy)) ethoxyphenyl] propane, β- (3,5-di-t-butyl-4-hydroxyphenyl)
Propionic acid alkyl ester etc.

Of these, the following compounds are preferably used. Triethylene glycol-bis [3- (3-t-butyl-
5-Methyl-4-hydroxyphenyl) propionate],
1,6-hexanediol-bis [3- (3,5-di-t-butyl-4-
Hydroxyphenyl) propionate], 2,2-thiodiethylenebis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], N, N'-hexamethylenebis (3,5
-Di-t-butyl-4-hydroxy-hydrocinnamide), 3,5-
Di-t-butyl-4-hydroxybenzylphosphonate-diethyl ester, 1,3,5-tris (2,6-dimethyl-3-hydroxy-4-t-butylbenzyl) isocyanurate, 1,3,5-
Tris [(3,5-di-t-butyl-4-hydroxyphenyl) propionyloxyethyl] isocyanurate, Tris (4-t-butyl-2,6-dimethyl-3-hydroxybenzyl) isocyanurate, 2,4 -Bis (n-octylthio) -6- (4-
Hydroxy-3,5-di-t-butylanilino) -1,3,5-triazine, tetrakis [methylene-3- (3,5-di-t-butyl-4-
Hydroxyphenyl) propionate] methane, bis (3,5-di-t-butyl-4-hydroxybenzylphosphonate ethyl) calcium, bis (3,5-di-t-butyl-4-hydroxybenzylphosphonate ethyl) nickel , Bis [3,3-bis (3-t-4-hydroxyphenyl) butyric acid] glycol ester, N, N'-bis [3,5-di-t-butyl-4-hydroxyphenyl) propionyl] hydrazine ), 2,2 '
-Ogizamide bis [ethyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], 2,2'-methylenebis (4-methyl-6-t-butylphenol) terephthalate, 1,3,5 -Trimethyl-2,4,6-tris (3,5-di-t-butyl
-4-Hydroxybenzyl) benzene, 3,9-bis [1,1-dimethyl-2- {β- (3-t-butyl-4-hydroxy-5-methylphenyl) propionyloxy} ethyl] -2,4 , 8,10-Tetraoxaspiro [5,5] undecane, 2,2-bis [4- (2-
(3,5-Di-t-butyl-4-hydroxyhydrocinnamoyloxy)) ethoxyphenyl] propane, β- (3,5-di-t-
Butyl-4-hydroxyphenyl) propionic acid alkyl ester.

As the β- (3,5-di-t-butyl-4-hydroxyphenyl) propionic acid alkyl ester, an alkyl ester having 18 or less carbon atoms is particularly preferable. Further, the compounds particularly preferably used in the present invention are as follows.

Tetrakis [methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] methane,
Bis (3,5-di-t-butyl-4-hydroxybenzylphosphonate ethyl) calcium, bis (3,5-di-t-butyl-4-hydroxybenzylphosphonate ethyl) nickel, bis [3,
5-bis (4-hydroxy-3-t-butylphenyl) butyric acid] glycol ester, N, N'-bis [3,5-di-t-
Butyl-4-hydroxyphenyl) propionyl] hydrazine), 2,2'-Ogizamide bis [ethyl-3- (3,5-di-t-
Butyl-4-hydroxyphenyl) propionate], 2,
2'-methylenebis (4-methyl-6-t-butylphenol) terephthalate, 1,3,5-trimethyl-2,4,6-tris (3,5-
Di-t-butyl-4-hydroxybenzyl) benzene, 3,9-bis [1,1-dimethyl-2- {β- (3-t-butyl-4-hydroxy-
5-Methylphenyl) propionyloxy} ethyl] -2,
4,8,10-Tetraoxaspiro [5,5] undecane, 1,3,5-
Tris [(3,5-di-t-butyl-4-hydroxyphenyl) propionyloxyethyl] isocyanurate, 2,2-bis [4- (2- (3,5-di-t-butyl-4-hydroxy Hydrocinnamoyloxy)) ethoxyphenyl] propane.

These phenolic stabilizers can be used alone or in combination. (B-2) Organic Phosphite Stabilizer As the organic phosphite stabilizer, conventionally known ones can be used without particular limitation, and specifically, the following compounds are used.

Trioctyl phosphite, trilauryl phosphite, tridecyl phosphite, octyl-diphenyl phosphite, tris (2,4-di-t-butylphenyl) phosphite, triphenyl phosphite, tris (butoxyethyl) Phosphite, tris (nonylphenyl) phosphite, distearyl pentaerythritol diphosphite, tetra (tridecyl) -1,1,3-tris (2-methyl-5-t-butyl-4-hydroxyphenyl) butanedi phosphite, tetra (C ₁₂ -C ₁₅ mixed alkyl) -4,4'-isopropylidene diphenyl diphosphite, tetra (tridecyl) -4,4'-butylidene bis (3-methyl -6-t-butylphenol) diphosphite, Tris (3,5-di-t-butyl-4-hydroxyphenyl) phosphite, Tris (mono / di mixed nonylphenyl) phosphite Sphite, hydrogenated-4,4'-isopropylidene diphenol polyphosphite, bis (octylphenyl) bis [4,4'-
Butylidene bis (3-methyl-6-t-butylphenol)]
・ 1,6-hexanediol diphosphite, phenyl ・ 4,
4'-isopropylidene diphenol pentaerythritol diphosphite, tris [4,4'-isopropylidene bis (2-t-butylphenol)] phosphite, phenyl diisodecyl phosphite, di (nonylphenyl)
Pentaerythritol diphosphite, tris (1,3-di
-Stearoyloxyisopropyl) phosphite, 4,
4'-isopropylidene bis (2-t-butylphenol)
Di (nonylphenyl) phosphite, 9,10-di-hydro-9
Examples include -oxa-9-oxa-10-phosphaphenanthrene-10-oxide.

Further, bis (dialkylphenyl) pentaerythritol diphosphite ester has the following formula (v):
The spiro type represented by and the cage type represented by the formula (vi) are also used. Usually, a mixture of both isomers is most often used for economic reasons resulting from the process for producing such phosphite esters.

[0170]

[Chemical 17]

Here, R ¹ , R ² and R ³ are preferably a hydrogen atom or an alkyl group having 1 to 9 carbon atoms, especially a tert-butyl group among branched alkyl groups. The substitution position is most preferably 2,4,6 position. A suitable phosphite ester is bis (2,4-diester
-t-Butylphenyl) pentaerythritol diphosphite, bis (2,6-di-t-butyl-4-methylphenyl) pentaerythritol diphosphite, which also has a structure in which carbon and phosphorus are directly bonded. Also included are compounds such as phosphonite, for example tetrakis (2,4-di-t-butylphenyl) -4,4'-biphenylenediphosphonite.

These organic phosphite stabilizers may be used alone or in combination. (B-3) Thioether-based Stabilizer As the thioether-based stabilizer, any conventionally known thioether-based stabilizer can be used without particular limitation. Specifically, the following compounds are used.

Dialkylthiodipropionates such as dilauryl-, dimyristyl-, distearyl- and polyhydric alcohols of alkylthiopropionic acids such as butyl-, octyl-, lauryl-, stearyl- (eg glycerin, trimethylolethane, trimethylol) Propane, pentaerythritol, trishydroxyethyl isocyanurate) ester (for example, pentaerythritol tetralauryl thiopropionate). More specifically, dilauryl thiodipropionate, dimyristyl thiodipropionate, distearyl thiodipropionate, lauryl stearyl thiodipropionate, distearyl thiodibutyrate and the like.

These thioether stabilizers can be used alone or in combination. (B-4) Hindered amine stabilizer As the hindered amine stabilizer, a compound having a structure in which all the hydrogens bonded to the carbons at the 2nd and 6th positions of conventionally known piperidine are substituted with methyl groups is particularly limited. Although it is used without any treatment, specifically, the following compounds are used. (1) Bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, (2) Dimethyl-1- (2-hydroxyethyl) -4-hydroxy-2,2,6,6-succinate Tetramethylpiperidine polycondensate, (3) poly [[6- (1,1,3,3-tetramethylbutyl) imino-1,3,5-triazine-2-4-diyl]
[(2,2,6,6-Tetramethyl-4-piperidyl) imino] hexamethylene [(2,2,6,6-tetramethyl-4-piperidyl) imino]], (4) Tetrakis (2,2 , 6,6-Tetramethyl-4-piperidyl) -1,2,3,4-butanetetracarboxylate, (5) 2,2,6,6-tetramethyl-4-piperidinylbenzoate, (6) Bis- (1,2,6,6-pentamethyl-4-
Piperidinyl) -2- (3,5-di-t-butyl-4-hydroxybenzyl) -2-n-butylmalonate, (7) bis- (N-methyl-2,2,6,6-tetramethyl -4-piperidinyl) sebacate, (8) 1,1 '-(1,2-ethanediyl) bis (3,3,5,5-
Tetramethylpiperazinone), (9) (mixed 2,2,
6,6-Tetramethyl-4-piperidyl / tridecyl) -1,2,3,
4-Butane tetracarboxylate, (10) (mixed
1,2,2,6,6-pentamethyl-4-piperidyl / tridecyl)-
1,2,3,4-butanetetracarboxylate, (11) mixed {2,2,6,6-tetramethyl-4-piperidyl / β, β,
β ', β'-tetramethyl-3-9- [2,4,8,10-tetraoxaspiro (5,5) undecane] diethyl} -1,2,3,4-butanetetracarboxylate, (12 ) Mixed {1,2,2,6,6-
Pentamethyl-4-piperidyl / β, β, β ', β'-tetramethyl-3-9- [2,4,8,10-tetraoxaspiro (5,5) undecane] diethyl} -1,2,3 , 4-Butane tetracarboxylate, (13) N, N'-bis (3-aminopropyl) ethylenediamine-2-4-bis [N-butyl N- (1,2,2,6,6-pentamethyl-4 -Piperidyl) amino] -6-chloro-1,3,5-triazine condensate, (14) poly [[6-N-morpholyl-1,3,5-
Triazine-2-4-diyl] [(2,2,6,6-tetramethyl-4-
Piperidyl) imino] hexamethylene [(2,2,6,6-tetramethyl-4-piperidyl) imino]], (15) N, N'-bis (2,2,6,6-tetramethyl-4- Piperidyl) hexamethylenediamine and 1,2-dibromoethane condensate, (16)
[N- (2,2,6,6-tetramethyl-4-piperidyl) -2-methyl
-2- (2,2,6,6-tetramethyl-4-piperidyl) imino] propionamide and the like.

Among them, the above (1), (2), (3), (4),
The compounds (8), (10), (11), (14) and (15) are preferably used. These hindered amine stabilizers can be used alone or in combination.

(B-5) Metal salt of higher fatty acid Examples of the metal salt of higher fatty acid include stearic acid, oleic acid, lauric acid, capric acid, arachidic acid, palmitic acid, behenic acid, 12-hydroxystearic acid and ricinoleic acid. , Alkaline earth metal salts such as magnesium salts, calcium salts and barium salts of higher fatty acids such as montanic acid, cadmium salts, zinc salts, lead salts, sodium salts, potassium salts, alkali metal salts such as lithium salts, etc. . Specifically, the following compounds are used.

Magnesium stearate, magnesium laurate, magnesium palmitate, calcium stearate, calcium oleate, calcium laurate, barium stearate, barium oleate, barium laurate, barium arachidate, barium behenate, zinc stearate, olein. Zinc acid, zinc laurate, lithium stearate, sodium stearate, sodium palmitate, sodium laurate, potassium stearate, potassium laurate, 12-
Calcium hydroxystearate, calcium montanate, etc.

These higher fatty acid metal salts may be used alone or in combination. Since the metal salt of higher fatty acid as described above has an effect as a lubricant and a rust preventive agent, a propylene-based random copolymer composition containing such a metal salt of higher fatty acid is excellent in moldability and can be molded. It is effective for preventing rust on machines.

The stabilizers selected from the above (B-1) to (B-5) are used in combination of at least one kind, preferably two or more kinds. The propylene random copolymer composition according to the present invention includes the above-mentioned propylene random copolymer (A), (B-1) phenolic stabilizer, (B-2) organic phosphite stabilizer, ( B-3) Thioether stabilizer, (B-
4) In addition to a hindered amine-based stabilizer and (B-5) at least one compound (B) selected from higher fatty acid metal salts, a rubber component for improving impact strength, a heat-resistant stabilizer, A weather resistance stabilizer, an antistatic agent, a slip agent, an antiblocking agent, an antifogging agent, a lubricant, a dye, a pigment, a natural oil, a synthetic oil, a wax and the like can be added, and the mixing ratio is an appropriate amount.

Further, in the present invention, silica, diatomaceous earth, alumina, titanium oxide, magnesium oxide, pumice powder, pumice balloon, aluminum hydroxide are added to the propylene random copolymer composition within the range not impairing the object of the present invention. , Magnesium hydroxide, basic magnesium carbonate, dolomite, calcium sulfate, potassium titanate, barium sulfate, calcium sulfite, talc, clay, mica, asbestos, glass fiber, glass flakes, glass beads,
Calcium silicate, montmorillonite, bentonite,
Fillers such as graphite, aluminum powder, molybdenum sulfide, boron fibers, silicon carbide fibers, polyethylene fibers, polypropylene fibers, polyester fibers and polyamide fibers may be blended.

The propylene-based random copolymer composition of the present invention can be used without particular limitation in the field where polypropylene has been conventionally used, and particularly extruded sheet, unstretched film, stretched film, filament, injection It is preferably used for applications such as molded articles and blow molded articles.

The shape and product type of the extruded product comprising the propylene random copolymer composition of the present invention are not particularly limited, but specifically, sheets, films (unstretched films), pipes, hoses, electric wires. Examples thereof include coatings and filaments, which are particularly suitably used as sheets, films (unstretched films), filaments, and the like.
When producing an extrusion-molded article such as a sheet or a film (unstretched film) from the propylene random copolymer composition of the present invention, a conventionally known extruder can be used. For example, it can be produced by extruding the molten propylene-based random copolymer composition from a T-die using a single screw extruder, a kneading extruder, a ram extruder, a gear extruder or the like. Further, as the molding conditions, conventionally known conditions can be adopted. Such extruded sheet,
The film (unstretched film) has excellent rigidity and transparency as well as moisture resistance.

The stretched film can be produced by a conventionally known stretching apparatus using a sheet or film made of the above propylene random copolymer composition. For example, tenter method (longitudinal and transverse stretching, transverse and longitudinal stretching),
A simultaneous biaxial stretching method, a uniaxial stretching method and the like can be mentioned. The stretch ratio of the stretched film is preferably 20 to 70 times in the case of a biaxially stretched film, and is usually 2 to 10 times in the case of a uniaxially stretched film.
Further, the thickness of the stretched film is usually preferably 5 to 200 μm. Such a stretched film has excellent rigidity and transparency as well as excellent moisture resistance. An inflation film can also be produced from the propylene-based random copolymer composition of the present invention.

Sheets, unstretched films, and stretched films made of the propylene random copolymer composition of the present invention are excellent in transparency, transparency, gloss, rigidity, moisture resistance, and gas barrier property, and therefore are suitable for packaging. It can be widely used for films and the like. In particular, since it has excellent moisture resistance, it is suitable for press through packs used for packaging tablets, capsules, etc. of chemicals.

The filament made of the propylene random copolymer composition of the present invention can be produced, for example, by extruding a molten propylene random copolymer composition through a spinneret. The filament thus obtained may be further stretched. The stretching may be performed to such an extent that the propylene random copolymer is effectively imparted with at least uniaxial molecular orientation, and the stretching ratio is usually preferably 5 to 10 times. Such a filament has excellent rigidity.

The injection-molded article made of the propylene random copolymer composition of the present invention can be produced by a conventionally known injection-molding apparatus. Further, as the molding conditions, conventionally known conditions can be adopted. Such an injection-molded article is excellent in rigidity, impact resistance, surface gloss, chemical resistance, abrasion resistance and the like, and can be widely used in containers and the like.

The blow-molded article made of the propylene random copolymer composition of the present invention can be produced by a conventionally known blow-molding apparatus. Further, as the molding conditions, conventionally known conditions can be adopted. For example, in the case of extrusion blow molding, a tubular parison is extruded in a molten state of the propylene random copolymer composition from a die at a resin temperature of 100 to 300 ° C., and then the parison is held in a mold having a shape to be applied. After that, air is blown into the mold at a resin temperature of 130 to 300 ° C. to obtain a hollow molded product. The draw ratio is preferably 1.5 to 5 times in the transverse direction. In the case of injection blow molding, the resin temperature is 100-
At 300 ° C., the above propylene-based random copolymer composition is injected into a mold to form a parison, and then the parison is held in a mold having a shape to be imparted, and then air is blown thereinto at a resin temperature of 120 to 300 ° C. It is attached to a mold to obtain a hollow molded product. The stretching ratio is preferably 1.1 to 1.8 times in the machine direction and 1.3 to 2.5 times in the transverse direction. Such a blow-molded article has excellent rigidity and transparency, and also has excellent moisture resistance.

The propylene-based random copolymer composition of the present invention is a base material in a method (mold stamping molding) for producing a composite body in which both a skin material and a base material are simultaneously press-molded to form a composite integrated body. Can be used as The mold stamping molding obtained by this molding method is suitably used as an interior material for automobiles such as door trim, rear package trim, seat back garnish, instrument panel and the like. Such a mold stamping molding has excellent rigidity and transparency.

[0189]

The propylene random copolymer composition of the present invention is formed from a propylene random copolymer having a high propylene chain stereoregularity and at least one stabilizer. The resulting molded product is excellent in rigidity, transparency, solvent resistance and moisture resistance, as well as being excellent in heat stability at time, long-term heat resistance and weather resistance.

[0190]

The present invention will be described in more detail based on the following examples, but the invention is not intended to be limited to these examples.

[0191]

Examples 1 to 8 Melt flow rate (ASTM D1
238 standard, 230 ° C, 2.16 kg load) is 5.2 g
/ 10 minutes, the density is 0.897 g / cm ³ , and 2
[M ₅ ] of decane-insoluble component at 3 ° C. = 1.001, and 2
Propylene-based compound having a crystallization degree of decane insoluble of 3 ° C of 57%, a constitutional unit derived from propylene of 95.5 mol% and a constitutional unit derived from ethylene of 4.5 mol%. Various stabilizers as shown in Table 1 were added to the random copolymer, and the mixture was extruded at 230 ° C. using an extruder having a screw diameter of 45 mmφ and pelletized. Using this pellet, a commercially available T-die film molding machine equipped with an extruder of 65 mmφ has a width of 420 mm and a thickness of 0.
A 04 mm film was formed. The resin temperature of the molding machine is 2
The draft ratio was 0.6 at 50 ° C. and a film forming speed of 20 m / min. This film was evaluated for MFR, heat aging resistance and weather resistance by the methods described below. The results are shown in Table 2.

Evaluation was carried out by comparing the MFR of the heat stable film at the time of molding and the MFR of the pellet. MFR of film and MFR of pellet
The smaller the difference is from, the better the thermal stability.

The long-term heat-resistant and stable film was aged in a gear oven at 100 ° C.,
The time required for the residual tensile elongation to reach one half of the initial value was measured. The longer the time, the better the heat resistance stability.

Using a sunshine weather meter for the weather resistant film, the discharge voltage was 50 V, the discharge current was 60 A, and the conditions were 500 with rain.
Light irradiation was carried out for an hour to measure the residual tensile elongation. The greater the residual elongation rate, the better the weather resistance.

[0195]

Comparative Example 1 A film was formed in the same manner as in Examples 1 to 8 except that the stabilizer was not added. This film was evaluated for MFR, heat aging resistance, and weather resistance by the methods described above. The results are shown in Table 2.

[0196]

[Table 1]

Phenol-based stabilizer A: β- (3,5-di-t-butyl-4-hydroxyphenyl) propionic acid stearyl ester (trade name: Irganox 1076, manufactured by Ciba-Geigy Co., Ltd.) B: Tetrakis [ Methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propioneto] methane (trade name: Irganox 1010, manufactured by Ciba-Geigy Co., Ltd.) Organic phosphite stabilizer C: Tris (2, 4-di-t-butylphenyl) Phosphite (trade name: Phosphite 168, manufactured by Ciba-Geigy Co., Ltd.) D: Tetrakis (2,4-di-t-butylphenyl) -4,4'-biphenylenediphos Fight (Product name: Sandstub P-
EPQ, Sand Co., Ltd. thioether stabilizer E: dilauryl propionate (trade name: Antiox L NOF CORPORATION) hindered amine stabilizer F: bis (2,2,6,6-tetramethyl-4) -Piperidyl) sebacate (trade name: Sanol LS770, Sankyo Co., Ltd.) fatty acid metal salt G: calcium stearate

[0198]

[Table 2]

[0199]

Examples 9 to 14 Various stabilizers as shown in Table 3 were added to the same propylene-based random copolymer as used in Examples 1 to 8 and pelletized in the same manner as in Examples 1 to 8. , The film was formed. This film was evaluated for MFR, heat aging resistance, and weather resistance by the methods described above. The results are shown in Table 4.

[0200]

[Table 3]

Organic Phosphite Stabilizer C: Tris (2,4-di-t-butylphenyl) Phosphite (trade name: Phosphite 168, manufactured by Ciba-Geigy Co., Ltd.) D: Tetrakis (2,4-di) -t-Butylphenyl) -4,4'-biphenylene diphosphite (trade name: Sandstab P-
EPQ, Sand Co., Ltd.) Thioether stabilizer E: Dilauryl propionate (trade name: Antiox L, manufactured by NOF CORPORATION) Hindered amine stabilizer F: Bis (2,2,6,6-tetramethyl-) 4-piperidyl) sebacate (trade name: Sanol LS770, Sankyo Co., Ltd.) fatty acid metal salt G: calcium stearate

[0202]

[Table 4]

[0203]

Examples 15 to 21 Various stabilizers as shown in Table 5 were added to the same propylene-based random copolymer as used in Examples 1 to 8 and pelletized in the same manner as in Examples 1 to 8. , The film was formed. This film was evaluated for MFR, heat aging resistance, and weather resistance by the methods described above. The results are shown in Table 6.

[0204]

[Table 5]

Thioether stabilizer E: dilauryl propionate (trade name: Antiox L, manufactured by NOF CORPORATION) H: distearyl thiodipropionate (trade name: DS
TP "Yoshitomi" manufactured by Yoshitomi Pharmaceutical Co., Ltd. I: Pentaerythrityl tetra-β-mercaptolauryl propionate (trade name: Cynox 412S, manufactured by Cypro Kasei) Hindered amine stabilizer J: Bis (2,2) 2,6,6-tetramethyl-4-piperidyl) sebacate (trade name: Sanol LS770, Sankyo Co., Ltd.) fatty acid metal salt G: calcium stearate

[0206]

[Table 6]

[0207]

Examples 22 to 24 Various stabilizers as shown in Table 7 were added to the same propylene random copolymer as used in Examples 1 to 8 and pelletized in the same manner as in Examples 1 to 8. , The film was formed. This film was evaluated for MFR, heat aging resistance, and weather resistance by the methods described above. The results are shown in Table 8.

[0208]

[Table 7]

Hindered amine stabilizer F: Bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate (trade name: Sanol LS770, manufactured by Sankyo Co., Ltd.) J: poly [[6- (1, 1,3,3-Tetramethylbutyl) imino
-1,3,5-Triazine-2-4-diyl] [(2,2,6,6-tetramethyl-4-piperidyl) imino] hexamethylene [(2,2,
6,6-Tetramethyl-4-piperidyl) imino]], (trade name: Kimasorb 944LD, manufactured by Nippon Ciba Geigy) fatty acid metal salt G: calcium stearate

[0210]

[Table 8]

[0211]

Examples 25 to 31 Various stabilizers as shown in Table 9 were added to a propylene random copolymer similar to that used in Examples 1 to 8 and pelletized in the same manner as in Examples 1 to 8. , The film was formed. This film was evaluated for MFR, heat aging resistance, and weather resistance by the methods described above. The results are shown in Table 10.

[0212]

[Table 9]

Fatty acid metal salt G: calcium stearate K: 12-hydroxy calcium stearate L: magnesium stearate M: calcium montanate

[0214]

[Table 10]

[Brief description of drawings]

FIG. 1 is an explanatory view showing a process for preparing an olefin polymerization catalyst used for producing a propylene-based random copolymer used in the present invention.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location C08K 5/098 KEP C08K 5/098 KEP 5/13 5/13 5/17 KEV 5/17 KEV 5 / 36 KFD 5/36 KFD 5/524 KFM 5/524 KFM D01F 6/30 D01F 6/30 6/46 6/46 B // C08F 210/06 MJR C08F 210/06 MJR B29K 23:00

Claims (22)

[Claims] 1. (A) Melt flow rate at 230 ° C. and 2.16 kg load is in the range of 0.1 to 500 g / 10 min, 23 ° C. decane insoluble component has a crystallinity of 50% or more, and density. Is 0.910 g / cm ³ or less, and the stereoregularity determined by the following formula (1) from the absorption intensities of Pmmmm, Pw, Sαγ, Sαδ ⁺ , and Tδ ⁺ δ ⁺ in the ¹³ C-NMR spectrum of the decane-insoluble component at 23 ° C. A propylene random copolymer having a sex index [M ₅ ] in the range of 0.970 to 1.010 and (B) a phenolic stabilizer (B-1): the propylene random copolymer (A )
0.001 to 10 parts by weight per 100 parts by weight of the propylene-based random copolymer composition; (However, Pmmmm: Absorption intensity derived from the methyl group of the third unit at the site where 5 units of propylene units are continuously isotactically bonded Pw: Absorption intensity derived from the methyl group of propylene unit Sαγ: Secondary in main chain Absorption intensity Sαδ ⁺ from the secondary carbon such that one of the two tertiary carbons closest to the secondary carbon is in the α-position and the other is in the γ-position Sαδ ⁺ : in the main chain Of the two secondary carbons closest to the secondary carbon, one of which is at the α-position and the other of which is at the δ-position or a position away from the δ-position. Derived absorption intensity T δ ⁺ δ ⁺ : a tertiary carbon in the main chain, and one of the two tertiary carbons closest to the tertiary carbon, one of which is at the δ position or a position distant from the δ position, The other is derived from a tertiary carbon such that it is at the δ position or at a position distant from the δ position. Strength). 2. (A) The melt flow rate at 230 ° C. under a load of 2.16 kg is in the range of 0.1 to 500 g / 10 minutes, the crystallization degree of the decane-insoluble component at 23 ° C. is 50% or more, and the density is Is 0.910 g / cm ³ or less, and the stereoregularity determined from the absorption intensity of Pmmmm, Pw, Sαγ, Sαδ ⁺ and Tδ ⁺ δ ⁺ in the ¹³ C-NMR spectrum of the decane-insoluble component at 23 ° C. according to the following formula (1): A propylene random copolymer having a sex index [M ₅ ] in the range of 0.970 to 1.010, and (B) (B-1) phenolic stabilizer: the propylene random copolymer (A). )
0.001 to 10 parts by weight based on 100 parts by weight, (C) (B-2) organic phosphite stabilizer (B-3) thioether stabilizer (B-4) hindered amine stabilizer (B- 5) At least one compound selected from the group consisting of metal salts of higher fatty acids: 0.001 to 10 parts by weight based on 100 parts by weight of the propylene random copolymer (A). -Based random copolymer composition; (However, Pmmmm: Absorption intensity derived from the methyl group of the third unit at the site where 5 units of propylene units are continuously isotactically bonded Pw: Absorption intensity derived from the methyl group of propylene unit Sαγ: Secondary in main chain Absorption intensity Sαδ ⁺ from the secondary carbon such that one of the two tertiary carbons closest to the secondary carbon is in the α-position and the other is in the γ-position Sαδ ⁺ : in the main chain Of the two secondary carbons closest to the secondary carbon, one of which is at the α-position and the other of which is at the δ-position or a position away from the δ-position. Derived absorption intensity T δ ⁺ δ ⁺ : a tertiary carbon in the main chain, and one of the two tertiary carbons closest to the tertiary carbon, one of which is at the δ position or a position distant from the δ position, The other is derived from a tertiary carbon such that it is at the δ position or at a position distant from the δ position. Strength). 3. The propylene-based random copolymer (A) contains a structural unit derived from a compound represented by the following formula (i) or (ii) in a proportion within a range of 10 to 10,000 ppm. Or the propylene-based random copolymer composition according to item 2; 4. (A) Melt flow rate at 230 ° C. and 2.16 kg load is in the range of 0.1 to 500 g / 10 minutes, 23 ° C. decane insoluble component has a crystallinity of 50% or more, and density. Is 0.910 g / cm ³ or less, and the stereoregularity determined by the following formula (1) from the absorption intensities of Pmmmm, Pw, Sαγ, Sαδ ⁺ , and Tδ ⁺ δ ⁺ in the ¹³ C-NMR spectrum of the decane-insoluble component at 23 ° C. A propylene-based random copolymer having a sex index [M ₅ ] in the range of 0.970 to 1.010, and (B) an organic phosphite-based stabilizer (B-2): the propylene-based random copolymer (A) 0.001 to 10 parts by weight relative to 100 parts by weight, a propylene-based random copolymer composition; (However, Pmmmm: Absorption intensity derived from the methyl group of the third unit at the site where 5 units of propylene units are continuously isotactically bonded Pw: Absorption intensity derived from the methyl group of propylene unit Sαγ: Secondary in main chain Absorption intensity Sαδ ⁺ from the secondary carbon such that one of the two tertiary carbons closest to the secondary carbon is in the α-position and the other is in the γ-position Sαδ ⁺ : in the main chain Of the two secondary carbons closest to the secondary carbon, one of which is at the α-position and the other of which is at the δ-position or a position away from the δ-position. Derived absorption intensity T δ ⁺ δ ⁺ : a tertiary carbon in the main chain, and one of the two tertiary carbons closest to the tertiary carbon, one of which is at the δ position or a position distant from the δ position, The other is derived from a tertiary carbon such that it is at the δ position or at a position distant from the δ position. Strength). 5. (A) The melt flow rate at 230 ° C. and a load of 2.16 kg is in the range of 0.1 to 500 g / 10 min, the crystallinity of the decane insoluble component at 23 ° C. is 50% or more, and the density is Is 0.910 g / cm ³ or less, and the stereoregularity determined by the following formula (1) from the absorption intensities of Pmmmm, Pw, Sαγ, Sαδ ⁺ , and Tδ ⁺ δ ⁺ in the ¹³ C-NMR spectrum of the decane-insoluble component at 23 ° C. A propylene random copolymer having a sex index [M ₅ ] in the range of 0.970 to 1.010, and (B) an organic phosphite stabilizer (B-2): the propylene random copolymer (A) 0.001 to 10 parts by weight relative to 100 parts by weight, (C) (B-3) thioether stabilizer (B-4) hindered amine stabilizer (B-5) metal salt of higher fatty acid Of at least one selected from the group By: the propylene random copolymer (A) propylene-based random copolymer composition characterized in that it consists of a 0.001 parts by weight per 100 parts by weight; Equation 4] (However, Pmmmm: Absorption intensity derived from the methyl group of the third unit at the site where 5 units of propylene units are continuously isotactically bonded Pw: Absorption intensity derived from the methyl group of propylene unit Sαγ: Secondary in main chain Absorption intensity Sαδ ⁺ from the secondary carbon such that one of the two tertiary carbons closest to the secondary carbon is in the α-position and the other is in the γ-position Sαδ ⁺ : in the main chain Of the two secondary carbons closest to the secondary carbon, one of which is at the α-position and the other of which is at the δ-position or a position away from the δ-position. Derived absorption intensity T δ ⁺ δ ⁺ : a tertiary carbon in the main chain, and one of the two tertiary carbons closest to the tertiary carbon, one of which is at the δ position or a position distant from the δ position, The other is derived from a tertiary carbon such that it is at the δ position or at a position distant from the δ position. Strength). 6. The propylene random copolymer (A) contains a structural unit derived from a compound represented by the following formula (i) or (ii) in a proportion within the range of 10 to 10000 ppm. Or the propylene-based random copolymer composition as described in 5 above; 7. (A) Melt flow rate at 230 ° C. and 2.16 kg load is in the range of 0.1 to 500 g / 10 minutes, 23 ° C. decane insoluble component has a crystallinity of 50% or more, and density. Is 0.910 g / cm ³ or less, and the stereoregularity determined by the following formula (1) from the absorption intensities of Pmmmm, Pw, Sαγ, Sαδ ⁺ , and Tδ ⁺ δ ⁺ in the ¹³ C-NMR spectrum of the decane-insoluble component at 23 ° C. A propylene-based random copolymer having a sex index [M ₅ ] in the range of 0.970 to 1.010, and (B) a thioether-based stabilizer (B-3): the propylene-based random copolymer (A ) 0.001 to 10 parts by weight based on 100 parts by weight of the propylene-based random copolymer composition; (However, Pmmmm: Absorption intensity derived from the methyl group of the third unit at the site where 5 units of propylene units are continuously isotactically bonded Pw: Absorption intensity derived from the methyl group of propylene unit Sαγ: Secondary in main chain Absorption intensity Sαδ ⁺ from the secondary carbon such that one of the two tertiary carbons closest to the secondary carbon is in the α-position and the other is in the γ-position Sαδ ⁺ : in the main chain Of the two secondary carbons closest to the secondary carbon, one of which is at the α-position and the other of which is at the δ-position or a position away from the δ-position. Derived absorption intensity T δ ⁺ δ ⁺ : a tertiary carbon in the main chain, and one of the two tertiary carbons closest to the tertiary carbon, one of which is at the δ position or a position distant from the δ position, The other is derived from a tertiary carbon such that it is at the δ position or at a position distant from the δ position. Strength). 8. (A) Melt flow rate at 230 ° C., 2.16 kg load is in the range of 0.1 to 500 g / 10 minutes, 23 ° C. decane insoluble component has a crystallinity of 50% or more, and density. Is 0.910 g / cm ³ or less, and the stereoregularity determined by the following formula (1) from the absorption intensities of Pmmmm, Pw, Sαγ, Sαδ ⁺ , and Tδ ⁺ δ ⁺ in the ¹³ C-NMR spectrum of the decane-insoluble component at 23 ° C. A propylene random copolymer having a sex index [M ₅ ] in the range of 0.970 to 1.010, and (B) (B-3) thioether stabilizer: the propylene random copolymer (A). ) 0.001 to 10 parts by weight per 100 parts by weight, and (C) (B-4) hindered amine stabilizer (B-5) at least one compound selected from the group consisting of metal salts of higher fatty acids: Propylene random 0.001 to 10 parts by weight relative to 100 parts by weight of the polymer (A), a propylene-based random copolymer composition; (However, Pmmmm: Absorption intensity derived from the methyl group of the third unit at the site where 5 units of propylene units are continuously isotactically bonded Pw: Absorption intensity derived from the methyl group of propylene unit Sαγ: Secondary in main chain Absorption intensity Sαδ ⁺ from the secondary carbon such that one of the two tertiary carbons closest to the secondary carbon is in the α-position and the other is in the γ-position Sαδ ⁺ : in the main chain Of the two secondary carbons closest to the secondary carbon, one of which is at the α-position and the other of which is at the δ-position or a position away from the δ-position. Derived absorption intensity T δ ⁺ δ ⁺ : a tertiary carbon in the main chain, and one of the two tertiary carbons closest to the tertiary carbon, one of which is at the δ position or a position distant from the δ position, The other is derived from a tertiary carbon such that it is at the δ position or at a position distant from the δ position. Strength). 9. The propylene-based random copolymer (A) contains a structural unit derived from a compound represented by the following formula (i) or (ii) in a proportion within a range of 10 to 10,000 ppm. Or the propylene-based random copolymer composition according to item 8; (A) The melt flow rate at 230 ° C. under a load of 2.16 kg is in the range of 0.1 to 500 g / 10 minutes, the crystallinity of the decane insoluble component at 23 ° C. is 50% or more, and the density is Is 0.910 g / cm ³ or less, and the stereoregularity determined by the following formula (1) from the absorption intensities of Pmmmm, Pw, Sαγ, Sαδ ⁺ , and Tδ ⁺ δ ⁺ in the ¹³ C-NMR spectrum of the decane-insoluble component at 23 ° C. A propylene random copolymer having a sex index [M ₅ ] in the range of 0.970 to 1.010 and (B) a hindered amine stabilizer (B-4): the propylene random copolymer (A ) 0.001 to 10 parts by weight based on 100 parts by weight of the propylene-based random copolymer composition; (However, Pmmmm: Absorption intensity derived from the methyl group of the third unit at the site where 5 units of propylene units are continuously isotactically bonded Pw: Absorption intensity derived from the methyl group of propylene unit Sαγ: Secondary in main chain Absorption intensity Sαδ ⁺ from the secondary carbon such that one of the two tertiary carbons closest to the secondary carbon is in the α-position and the other is in the γ-position Sαδ ⁺ : in the main chain Of the two secondary carbons closest to the secondary carbon, one of which is at the α-position and the other of which is at the δ-position or a position away from the δ-position. Derived absorption intensity T δ ⁺ δ ⁺ : a tertiary carbon in the main chain, and one of the two tertiary carbons closest to the tertiary carbon, one of which is at the δ position or a position distant from the δ position, The other is derived from a tertiary carbon such that it is at the δ position or at a position distant from the δ position. Strength). 11. (A) The melt flow rate at 230 ° C. and a load of 2.16 kg is in the range of 0.1 to 500 g / 10 minutes, the crystallinity of the decane-insoluble component at 23 ° C. is 50% or more, and the density is Is 0.910 g / cm ³ or less, and the stereoregularity determined by the following formula (1) from the absorption intensities of Pmmmm, Pw, Sαγ, Sαδ ⁺ , and Tδ ⁺ δ ⁺ in the ¹³ C-NMR spectrum of the decane-insoluble component at 23 ° C. A propylene random copolymer having a sex index [M ₅ ] in the range of 0.970 to 1.010 and (B) a hindered amine stabilizer (B-4): the propylene random copolymer (A ) 0.001 to 10 parts by weight based on 100 parts by weight, and (C) metal salt of higher fatty acid (B-5): 0.0 based on 100 parts by weight of the propylene-based random copolymer (A).
A propylene-based random copolymer composition, characterized by comprising 0.1 to 10 parts by weight; (However, Pmmmm: Absorption intensity derived from the methyl group of the third unit at the site where 5 units of propylene units are continuously isotactically bonded Pw: Absorption intensity derived from the methyl group of propylene unit Sαγ: Secondary in main chain Absorption intensity Sαδ ⁺ from the secondary carbon such that one of the two tertiary carbons closest to the secondary carbon is in the α-position and the other is in the γ-position Sαδ ⁺ : in the main chain Of the two secondary carbons closest to the secondary carbon, one of which is at the α-position and the other of which is at the δ-position or a position away from the δ-position. Derived absorption intensity T δ ⁺ δ ⁺ : a tertiary carbon in the main chain, and one of the two tertiary carbons closest to the tertiary carbon, one of which is at the δ position or a position distant from the δ position, The other is derived from a tertiary carbon such that it is at the δ position or at a position distant from the δ position. Strength). 12. The propylene-based random copolymer (A) contains a structural unit derived from a compound represented by the following formula (i) or (ii) in a proportion within a range of 10 to 10,000 ppm. Or the propylene-based random copolymer composition according to item 11; 13. (A) Melt flow rate at 230 ° C. and 2.16 kg load is in the range of 0.1 to 500 g / 10 minutes, 23 ° C. decane insoluble component has a crystallinity of 50% or more, and density. Is 0.910 g / cm ³ or less, and the stereoregularity determined by the following formula (1) from the absorption intensities of Pmmmm, Pw, Sαγ, Sαδ ⁺ , and Tδ ⁺ δ ⁺ in the ¹³ C-NMR spectrum of the decane-insoluble component at 23 ° C. A propylene-based random copolymer having a sex index [M ₅ ] in the range of 0.970 to 1.010 and (B) a higher fatty acid metal salt (B-5): the propylene-based random copolymer ( A)
0.001 to 10 parts by weight per 100 parts by weight of the propylene random copolymer composition; (However, Pmmmm: Absorption intensity derived from the methyl group of the third unit at the site where 5 units of propylene units are continuously isotactically bonded Pw: Absorption intensity derived from the methyl group of propylene unit Sαγ: Secondary in main chain Absorption intensity Sαδ ⁺ from the secondary carbon such that one of the two tertiary carbons closest to the secondary carbon is in the α-position and the other is in the γ-position Sαδ ⁺ : in the main chain Of the two secondary carbons closest to the secondary carbon, one of which is at the α-position and the other of which is at the δ-position or a position away from the δ-position. Derived absorption intensity T δ ⁺ δ ⁺ : a tertiary carbon in the main chain, and one of the two tertiary carbons closest to the tertiary carbon, one of which is at the δ position or a position distant from the δ position, The other is derived from a tertiary carbon such that it is at the δ position or at a position distant from the δ position. Strength). 14. The propylene random copolymer (A) contains a constitutional unit derived from a compound represented by the following formula (i) or (ii) in a proportion within a range of 10 to 10,000 ppm. The propylene-based random copolymer composition according to item 1; 15. An extruded sheet comprising the propylene-based random copolymer composition according to any one of claims 1 to 14. 16. An unstretched film comprising the propylene-based random copolymer composition according to any one of claims 1 to 14. 17. A stretched film comprising the propylene-based random copolymer composition according to any one of claims 1 to 14. 18. A filament comprising the propylene random copolymer composition according to any one of claims 1 to 14. 19. An injection molded article comprising the propylene random copolymer composition according to any one of claims 1 to 14. 20. A blow-molded article comprising the propylene random copolymer composition according to any one of claims 1 to 14. 21. A press-through pack comprising the propylene random copolymer composition according to any one of claims 1 to 14. 22. A mold stamping molded article comprising the propylene random copolymer composition according to any one of claims 1 to 14.