JP2001172450A - Syndiotactic polypropylene composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a polypropylene composition that can give molded products having excellent balance between transparency, shock resistance, flexibility, heat resistance, scratching resistance, and the like. SOLUTION: This syndiotactic polypropylene composition comprises (i) a specific syndiotactic polypropylene and (ii) a specific copolymer from two or more kinds of α-olefins where the weight ratio of (i) syndiotactic polypropylene to (ii) the total of plural α-olefin copolymers the weight ratio of (i)/(ii)} is in the range of 90/10-10/90.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a syndiotactic polypropylene composition, and more particularly, to a syndiotactic polypropylene composition having excellent transparency, flexibility, impact resistance, and heat sealability.

[0002]

BACKGROUND OF THE INVENTION A film made of isotactic polypropylene obtained by copolymerizing propylene and ethylene and, if necessary, an α-olefin having 4 to 20 carbon atoms is inexpensive, flexible, moisture-resistant and heat-resistant. Because of its excellent properties, it is widely used in various packaging materials. However, when the thickness of the film is increased to prevent damage to the contents, transparency, flexibility, and heat sealing properties are deteriorated. In order to improve the problem, a random isotactic propylene copolymer is used. When the content of the comonomer in the coalesce is increased, the solid component becomes remarkable, and there are problems such as the problem of blocking resistance, and the transparency, flexibility, and heat sealability using a thick film are excellent. The production of the material was difficult.

On the other hand, it is known that syndiotactic polypropylene is obtained by low-temperature polymerization in the presence of a catalyst comprising a vanadium compound, ether and organoaluminum. However, the polymer obtained by this method has a low syndiotacticity, and it cannot be said that the polymer exhibits the original syndiotactic property.

On the other hand, in J. A. According to Ewen et al., For the first time, it is possible to obtain a polypropylene having a high tacticity such that the syndiotactic pentad fraction exceeds 0.7 in the presence of a transition metal catalyst having an asymmetric ligand and an aluminoxane catalyst. (J. Am. Chem. Soc., 1988, 110,
6255-6256).

[0005] In the above J.P. A. The polymer obtained by the method of Ewen et al. Had a high syndiotacticity and had more elastic properties than isotactic polypropylene, but this was used as a soft molding material, for example, soft vinyl chloride or polypropylene. When trying to use in the field where vulcanized rubber is used, its flexibility and rubber elasticity,
There was a problem that the mechanical strength was not sufficient.

Attempts have also been made to improve the flexibility and impact resistance of a propylene-based polymer by blending it with an ethylene-propylene copolymer rubber or the like in which the stereoregularity of the propylene constituent units is isotactic. But
A molded article comprising the resin composition obtained by this method,
Although flexibility and impact resistance were improved to some extent, they were not sufficient.

The inventors of the present invention have made intensive studies to solve the above problems, and have found that a syndiotactic polypropylene composition comprising a specific syndiotactic polypropylene and at least two different α-olefin-based copolymers. It has been found that a composition excellent in the balance of transparency, flexibility, heat sealability and impact resistance can be obtained by using, and the present invention has been completed.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems associated with the prior art as described above, and to provide a syndiotactic polypropylene system having excellent transparency, flexibility, heat sealability and impact resistance. It is intended to provide a composition.

[0009]

SUMMARY OF THE INVENTION The syndiotactic polypropylene composition according to the present invention comprises (i) a structural unit (A) which has a substantially syndiotactic structure and is derived from a propylene component, and if necessary, is derived from ethylene. A structural unit (B) and / or a structural unit (C) derived from an α-olefin having 4 to 20 carbon atoms, wherein the structural unit (A) is in an amount of 90 to 100 mol% and the structural unit ( B) is contained in an amount of 0 to 10 mol%, the structural unit (C) is contained in an amount of 0 to 9.5 mol%, and the intrinsic viscosity [η] measured in decalin at 135 ° C is 0.5 to 10 mol%. A syndiotactic polypropylene in the range of 10 dl / g;
i) two types in which a constituent unit derived from at least one α-olefin selected from α-olefins having 2 to 20 carbon atoms is contained in an amount of 50 to 100 mol% and a Young's modulus is 150 MPa or less; And a weight ratio of the syndiotactic polypropylene (i) and the total of the two or more α-olefin-based copolymers (ii) を (i) / (( i
i) is in the range of 90/10 to 10/90, and the content of each of the two or more α-olefin-based copolymers is at least 1% by weight.

In a preferred embodiment according to the present invention, there is provided a composition wherein (iii) a crystal nucleating agent is contained in an amount of 0.01 to 1 part by weight based on 100 parts by weight of the syndiotactic polypropylene composition.

In the present invention, the syndiotactic polypropylene (i) has a syndiotacticity in the range of 0.6 or more as viewed from the triad chain of propylene, and the α-olefin-based copolymer (ii) 135
Intrinsic viscosity [η] measured in decalin at a temperature of 0.01 to
It is in the range of 10 dl / g, and is determined by gel permeation chromatography (GPC).
w / Mn) is 4 or less and the crystal nucleating agent (iii) is 0.01 to the syndiotactic polypropylene-based composition having a glass transition temperature (Tg) of -5 ° C or less.
Preferably it is included in an amount of up to 1 part by weight.

In the present invention, the α-olefin-based copolymer (ii) contains a structural unit derived from ethylene as 5 units.
0-99 mol%, α-C 3 -C 20
It is preferable to contain a constituent unit derived from at least one kind of α-olefin selected from olefins in an amount of 1 to 50 mol%.

Further, in the present invention, the α-olefin-based copolymer (ii) contains a constituent unit derived from propylene in an amount of 50 to 99 mol%, and contains α-olefin having 2 to 20 carbon atoms excluding propylene. Structural units derived from at least one α-olefin selected from olefins are 1 to 5
Preferably, it is contained in an amount of 0 mol%.

The α-olefin copolymer (ii)
In the presence of at least one catalyst system comprising the following component (a) and at least one compound selected from the following components (b), (c) and (d): (A): a transition metal complex represented by the following general formula (I) or (II)

[0015]

Embedded image

[In the formulas (I) and (II), M is Ti, Z
r, Hf, Rn, Nd, Sm or Ru, and Cp ¹
And Cp ² are a cyclopentadienyl group, an indenyl group, a fluorenyl group or a derivative group thereof bonded to M by π, X ¹ and X ² are an anionic ligand or a neutral Lewis base ligand Y is a ligand containing a nitrogen atom, an oxygen atom, a phosphorus atom, or a sulfur atom, and Z is a C, O, B, S, Ge, Si or Sn atom or a group containing these atoms. It is. (B): a compound that reacts with the transition metal M in the component (a) to form an ionic complex (c): an organoaluminum compound (d): an aluminoxane.

The syndiotactic polypropylene composition according to the present invention is excellent in transparency, flexibility, heat sealability and impact resistance in a well-balanced manner.

[0018]

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, the syndiotactic polypropylene composition according to the present invention will be described in detail. [Syndiotactic polypropylene-based composition] The syndiotactic polypropylene-based composition according to the present invention comprises: (i) a structural unit (A) derived from a propylene component having a substantially syndiotactic structure; A structural unit (B) derived from ethylene and / or a structural unit (C) derived from an α-olefin having 4 to 20 carbon atoms, wherein the structural unit (A) is 90 to
The constituent unit (B) is contained in an amount of 0 to 10 mol% and the constituent unit (C) is contained in an amount of 0 to 9.5 mol% in an amount of 100 mol%, and is measured in decalin at 135 ° C. A syndiotactic polypropylene having an intrinsic viscosity [η] in the range of 0.5 to 10 dl / g, and (ii) having 2 carbon atoms.
A structural unit derived from at least one type of α-olefin selected from α-olefins of from 20 to 20 in an amount of 50 to 100 mol%, and a Young's modulus (Young's modulus)
And two or more α-olefin-based copolymers having a pressure of 150 MPa or less.

Hereinafter, first, each component (i) contained in the syndiotactic polypropylene composition,
(Ii) will be described. <(I) Syndiotactic polypropylene> The syndiotactic polypropylene (i) is a structural unit (A) derived from a propylene component and, if necessary, a structural unit (B) derived from ethylene and / or a carbon atom having 4 carbon atoms. A syndiotactic polypropylene comprising a structural unit (C) derived from an α-olefin of from 20 to 20, wherein the structural unit (A) is in an amount of 90 to 100 mol%, preferably in an amount of 92 to 100 mol%. More preferably, it is contained in an amount of 92 to 98 mol%, and the structural unit (B) is contained in an amount of 0 to 10 mol%, preferably in an amount of 0 to 8 mol%, more preferably 0.2 to 98 mol%. 8 mol%, wherein the structural unit (C) is contained in an amount of 0 to 9.5 mol%,
Preferably it is contained in an amount of 0 to 8.5 mol%, more preferably in an amount of 0 to 7 mol%.

The α-olefin having 4 to 20 carbon atoms used as the structural unit (C) in the syndiotactic polypropylene includes 1-butene and 1-butene.
Pentene, 1-hexene, 1-octene, 4-methyl-
Examples thereof include 1-pentene, 3-methyl-1-pentene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, and 1-eicosane, with 1-butene being preferred.

The intrinsic viscosity [η] of the syndiotactic polypropylene measured in decalin at 135 ° C.
Is 0.5 to 10 dl / g, preferably 1.0 to 6 dl
/ G, more preferably in the range of 1.0 to 4 dl / g. When the intrinsic viscosity is in such a range, good fluidity is exhibited, and the syndiotactic polypropylene and other components are mixed. There is a tendency that a molded article excellent in mechanical strength is easily obtained from the obtained composition.

In the syndiotactic polypropylene, it is desirable that the syndiotacticity of the propylene in the triad chain is 0.6 or more, preferably 0.7 or more. Within this range, the crystallization speed is high and the workability is excellent.

Here, the syndiotacticity viewed from the triad chain will be described. The triad tacticity of the syndiotactic polypropylene (i) (hereinafter sometimes referred to as “rr fraction”) is ¹³ % of the copolymer.
The intensity (area) ratio of the side chain methyl group of the second unit of the three-chain part of the head-to-tail bonded propylene unit is obtained from the C-NMR spectrum and the following formula (1).

Rr fraction (%) = PPP (rr) / {PPP (mm) + PPP (mr) + PPP (rr)} (1)

(Where PPP (mm), PPP (mr), PPP
(rr) is the area of the side-chain methyl group of the second unit of the three-chain part of the head-tail bonded propylene unit observed in the following shift region of the ¹³ C-NMR spectrum. )

[0026]

[Table 1]

Such PPP (mm), PPP (mr), PP
P (rr) represents a head-to-tail bonded propylene 3 unit chain having the following structure.

[0028]

Embedded image

In the methyl carbon region (19 to 23 pp)
In m), in addition to the side chain methyl groups of the propylene units in the three head-to-tail bonded propylene chains, peaks of the side chain methyl groups of the propylene units in the other chains as described below are observed. When determining the rr fraction, the peak area of such a methyl group that is not based on three chains of propylene units is corrected as follows. Hereinafter, E indicates a structural unit derived from ethylene.

In the second region, the propylenes have a head-
A peak derived from the side chain methyl group of the second unit (propylene unit) in the tail-linked PPE 3 chain is observed.
The area of the methyl group peak can be determined from the peak area of the methine group (resonating around 30.6 ppm) of the second unit (propylene unit) in the PPE chain.

In the third area, the second in the EPE3 chain
A peak derived from the side chain methyl group of the unit (propylene unit) is observed. The peak area of this methyl group is
The methine group (3) of the second unit (propylene unit) in the chain
(Resonance around 2.9 ppm).

In the second and third regions, the positionally irregular units as shown by the following partial structures (i), (ii) and (iii), which are contained in a small amount in the ethylene / ethylene random copolymer, Peaks derived from the methyl groups CE to E ′ are observed.

In the second region, a methyl group C peak, a methyl group D peak and a methyl group D ′ peak are observed,
In the region, a methyl group E peak and a methyl group E ′ peak are observed.

The methyl group A peak and the methyl group B peak in the methyl groups in the position irregular units (i) to (iii)
Observed at 17.3 ppm and 17.0 ppm, respectively,
It is not observed in three regions.

[0035]

Embedded image

The peak area of the methyl group C can be determined from the peak area of the adjacent methine group (resonating at around 31.3 ppm). The peak area of the methyl group D has the structure (ii)
Can be determined from 1/2 of the sum of the peak areas of the peaks (around 34.3 ppm and around 34.5 ppm) based on the αβ methylene carbon.

The peak area of the methyl group D ′ is determined by the structure (iii)
Of the methine group adjacent to the methyl group E ′ (3
(Around 3.3 ppm). The peak area of the methyl group E was calculated from the adjacent methine carbon (33.7p
pm).

The peak area of the methyl group E 'can be determined from the peak area of the adjacent methine carbon (around 33.3 ppm).

Therefore, by subtracting these peak areas from the total peak areas of the second and third regions, the peak area of the side chain methyl group of the second propylene unit in the three chains of head-to-tail bonded propylene units is obtained. be able to.

Each carbon peak in the spectrum can be assigned with reference to the literature (Polymer, 30, 1350 (1989)). In the production of such syndiotactic polypropylene, the following components (a1) are used as catalysts:
At least one catalyst system comprising at least one compound selected from the following components (b1), (c1) and (d1) is preferably used.

(A1): Transition metal complex represented by the following general formula (I) or (II)

[0042]

Embedded image

[In the formulas (I) and (II), M is Ti, Zr,
Hp, Rn, Nd, Sm or Ru, Cp ¹ and Cp ² are a cyclopentadienyl group, an indenyl group, a fluorenyl group or a derivative group thereof bonded to M by π, and X ¹ and X ² are , An anionic ligand or a neutral Lewis base ligand, Y is a ligand containing a nitrogen atom, an oxygen atom, a phosphorus atom, or a sulfur atom, and Z is C, O, B, S, Ge, Si or Sn atom or a group containing these atoms. (B1): a compound that reacts with the transition metal M in the component (a1) to form an ionic complex (c1): an organoaluminum compound (d1): aluminoxane (sometimes referred to as an aluminum oxy compound).

The components (a1), (b1), (c1) and (d1) will be described below. <Transition metal complex (a1)> The catalyst component (a) for producing the syndiotactic polypropylene (i) according to the present invention.
For 1), the same transition metal complex as the catalyst component (a2) for producing the α-olefin-based copolymer (ii) described below can be used. Details of the component (a1) will be described in the component (a2). <Compound (b1) that reacts with transition metal M in component (a1) to form an ionic complex> Reacts with the transition metal compound (I) or (II) that forms the catalyst used in the present invention. The compound (b1) which forms an ion pair as described in
JP-A-501950, JP-A-1-502036, JP-A-3-179005, JP-A-3-179
No. 006, JP-A-3-207703, JP-A-3-207704, and US Pat. No. 5,457,718. Lewis acids, ionic compounds and carborane compounds can be exemplified.

As the Lewis acid, triphenylboron,
Tris (4-fluorophenyl) boron, tris (p-tolyl) boron, tris (o-tolyl) boron, tris (3,5-
Dimethylphenyl) boron, tris (pentafluorophenyl) _{boron, MgCl 2, Al 2 O 3} , SiO 2 -Al 2
O ₃ can be exemplified.

Examples of the ionic compound include triphenylcarbenium tetrakis (pentafluorophenyl) borate, tri-n-butylammonium tetrakis (pentafluorophenyl) borate, N, N-dimethylanilinium tetrakis (pentafluorophenyl) borate, Cenium tetra (pentafluorophenyl) borate can be exemplified.

Examples of the carborane compound include dodecaborane, 1-carboundecaborane, bis-n-butylammonium (1-carbedodeca) borate, tri-n-butylammonium (7,8-dicarboundeca) borate, and tri-n-butylammonium (Trideca hydride-7-carboundeca) borate and the like can be exemplified.

The compounds (b1) forming an ion pair as described above can be used alone or in combination of two or more. <Organic aluminum compound (c1)> In the present invention,
The organoaluminum compound (c1) used as necessary when forming a catalyst is represented by, for example, the following general formula (IV).

R ⁹ _n AlX _3-n (IV) (wherein R ⁹ is a hydrocarbon group having 1 to 12 carbon atoms;
Is a halogen atom or a hydrogen atom, and n is 1 to 3. In the general formula (IV), R ⁹ has 1 to 12 carbon atoms.
Hydrocarbon group, for example, an alkyl group, a cycloalkyl group or an aryl group, specifically, methyl group, ethyl group, n-propyl group, isopropyl group, isobutyl group,
Examples include a pentyl group, a hexyl group, an octyl group, a cyclopentyl group, a cyclohexyl group, a phenyl group, and a tolyl group.

Such an organoaluminum compound (IV)
As, specifically, trimethylaluminum, triethylaluminum, triisopropylaluminum,
Trialkyl aluminum such as triisobutyl aluminum, trioctyl aluminum, tri (2-ethylhexyl) aluminum and tridecyl aluminum; alkenyl aluminum such as isoprenyl aluminum; dimethyl aluminum chloride, diethyl aluminum chloride, diisopropyl aluminum chloride, diisobutyl aluminum chloride, dimethyl Dialkylaluminum halides such as aluminum bromide; alkylaluminum sesquichlorides such as methylaluminum sesquichloride, ethylaluminum sesquichloride, isopropylaluminum sesquichloride, butylaluminum sesquichloride, ethylaluminum sesquibromide; methylaluminum dichloride, ethylaluminum dichloride Alkyl aluminum dihalides such as isopropyl aluminum dichloride and ethyl aluminum dibromide; and alkyl aluminum hydrides such as diethyl aluminum hydride and diisobutyl aluminum hydride.

As the organoaluminum compound (c1), a compound represented by the following general formula (V) can also be used. R ⁹ _n AlL _3-n (V) (wherein R ⁹ is the same as above, L is —OR ¹⁰ ,
OSiR ¹¹ ₃ group, -OAlR ¹² ₂ group, -NR ¹³ ₂ group, -Si
A R ¹⁴ ₃ group or -N (R ¹⁵⁾ AlR ¹⁶ ₂ group, n represents 1
R ¹⁰ , R ¹¹ , R ¹² and R ¹⁶ are a methyl group, an ethyl group, an isopropyl group, an isobutyl group, a cyclohexyl group, a phenyl group, etc., and R ¹³ is a hydrogen atom, a methyl group, an ethyl group, an isopropyl group. R ¹⁴ and R ¹⁵ are a methyl group, a phenyl group, a trimethylsilyl group, etc.
And an ethyl group. ) Among such organoaluminum compounds, R ⁷ _nA
a compound represented by l (OAlR ¹⁰ ₂ ) _3-n , for example, Et ₂ A
_{lOAlEt 2, (iso-Bu)} 2 AlOAl (iso-Bu) 2 , etc. are preferable.

[0052] Among the above general formula (IV) and an organic aluminum compound represented by (V), the general formula R ⁷ compound represented by ₃ Al are preferred, especially those wherein R ⁷ is an isoalkyl group. <Aluminoxane (d1)> Examples of the aluminoxane (d1) according to the present invention include those obtained by condensing an alkylaluminum with water. Particularly, methylaluminoxane is preferable, and the degree of polymerization is 5 or more, preferably 10 or more. Things are used.

A conventionally known aluminoxane can be produced, for example, by the following method. (1) Compounds containing water of adsorption or salts containing water of crystallization, such as hydrated magnesium chloride, hydrated copper sulfate, hydrated aluminum sulfate, hydrated nickel sulfate, hydrated cerous chloride A method of adding an organoaluminum compound such as trialkylaluminum to a hydrocarbon medium suspension of the above to react. (2) A method in which water, ice or steam is allowed to directly act on an organoaluminum compound such as trialkylaluminum in a medium such as benzene, toluene, ethyl ether or tetrahydrofuran. (3) A method of reacting an organoaluminum compound such as trialkylaluminum with an organotin oxide such as dimethyltin oxide or dibutyltin oxide in a medium such as decane, benzene or toluene.

The aluminoxane may contain a small amount of an organic metal component. Alternatively, the solvent or unreacted organoaluminum compound may be removed from the recovered solution of aluminoxane by distillation, and then redissolved in a solvent or suspended in a poor solvent of aluminoxane.

Examples of the organoaluminum compound used for preparing the aluminoxane include trimethylaluminum, triethylaluminum, tripropylaluminum, triisopropylaluminum, trin-butylaluminum, triisobutylaluminum, trisec-butylaluminum. Trialkylalkyl such as aluminum, tritert-butylaluminum, tripentylaluminum, trihexylaluminum, trioctylaluminum, tridecylaluminum, etc .; tricycloalkylaluminum such as tricyclohexylaluminum, tricyclooctylaluminum; dimethylaluminum chloride, diethylaluminum Chloride, diethylaluminum bromide, diisobutylaluminum chloride, etc. Alkylaluminum halides; diethylaluminum hydride, dialkylaluminum hydride such as diisobutylaluminum hydride; dimethyl aluminum methoxide, dialkylaluminum alkoxides such as diethylaluminum ethoxide; and dialkylaluminum Ally Loki Sid such as diethyl aluminum phenoxide and the like.

Of these, trialkylaluminum and tricycloalkylaluminum are preferred, and trimethylaluminum is particularly preferred. Further, as the organoaluminum compound used when preparing the aluminoxane, isoprenyl aluminum represented by the following general formula (III) can also be used.

(I-C ₄ H ₉ ) _x Al _y (C ₅ H ₁₀ ) _z (III) (where x, y, and z are positive numbers and z ≧ 2x) Such organoaluminum compounds can be used alone or in combination.

Solvents used for the solution or suspension of aluminoxane include benzene, toluene, xylene,
Aromatic hydrocarbons such as aromatic hydrocarbons such as cumene and cymene, aliphatic hydrocarbons such as pentane, hexane, heptane, octane, decane, dodecane, hexadecane, and octadecane; alicyclic hydrocarbons such as cyclopentane, cyclohexane, cyclooctane, and methylcyclopentane And petroleum fractions such as gasoline, kerosene and light oil, and hydrocarbon solvents such as the above-mentioned aromatic hydrocarbons, aliphatic hydrocarbons and alicyclic hydrocarbon halides, especially chlorinated products and brominated products. In addition, ethers such as ethyl ether and tetrahydrofuran can also be used. Among these solvents, aromatic hydrocarbons and aliphatic hydrocarbons are particularly preferred. <Preparation of Catalyst> The metallocene catalyst used in the present invention can be prepared by mixing the above components in an inert hydrocarbon solvent or an olefin solvent.

Specific examples of the inert hydrocarbon solvent used for preparing the catalyst include aliphatic hydrocarbons such as propane, butane, pentane, hexane, heptane, octane, decane, dodecane and kerosene, cyclopentane, cyclohexane and methyl. Examples thereof include alicyclic hydrocarbons such as cyclopentane, aromatic hydrocarbons such as benzene, toluene, and xylene, halogenated hydrocarbons such as ethylene chloride, chlorobenzene, and dichloromethane, and mixtures thereof.

In preparing a catalyst from the above components, the components can be contacted in any order.

When the above components are brought into contact with each other,
(A1) (transition metal compound (I) or (II))
10^-8-10^-1Mol / liter (polymerization volume), preferably
Is 10 ^-7~ 5 × 10^-2Used in moles / liter
You.

When the component (b1) is used, the component (a)
1) The molar ratio (component (a1) / component (b1)) of ((I) or (II)) to component (b1) is usually 0.01.
-10, preferably 0.1-5.

The component (c1) is an atomic ratio (AlC / AlB) between the aluminum atom (AlC) in the component (c1) and the aluminum atom (AlB) in the component (b1), and is usually 0.1.
An amount of from 02 to 20, preferably from 0.2 to 10, can be used as needed.

The component (d1) has an atomic ratio (A) to the transition metal in the component (a1) ((I) or (II)).
1 / transition metal) and is usually used in an amount of 10 to 10,000, preferably 20 to 5,000.

The above catalyst components may be mixed and contacted in a polymerization vessel, or may be mixed and contacted beforehand and then added to the polymerization vessel. When contacting in advance, usually -50 ~
150 ° C, preferably -20 to 120 ° C, 1 to 100
Contact for 0 minutes, preferably 5 to 600 minutes. At the time of contact, the contact temperature may be changed.

In preparing the metallocene-based catalyst as described above, at least one of the components (b1), (c1) and (d1) is supported on a granular or fine particulate carrier. This may form a solid catalyst.

The carrier is preferably a porous oxide. For example, an inorganic carrier such as SiO ₂ and Al ₂ O ₃ can be used. Further, an organic carrier such as a polymer or a copolymer formed mainly of α-olefin such as ethylene, propylene and 1-butene or styrene can be used.

In the present invention, in place of the catalyst system, JP-A-2-41303 and JP-A-2-4130 are used.
No. 5, JP-A-2-274703, JP-A-2-2-2
No. 74704, JP-A-3-179005, JP-A-3-179006, JP-A-4-69394, JP-A-5-17589, or JP-A-8-179589.
The catalyst system described in JP-A-120127 can also be used.

Specifically, when producing such a syndiotactic polypropylene, the method described in J. Phys. A. Ewen et al., "JA.
m. Chem. Soc. , 1988, 110, 6255.
-6256 "can be used, and even if the compound has a structure different from that of the compound described in the literature, when the homopolymer of propylene is produced, the syndio of the polymer obtained is obtained. Tactic pentad fraction (A.
Zambelli et al Macromolecules vol 6 687 (1973); vol 8 9
25 (1975)) can be used as long as the catalyst system gives a polymer having a relatively high tacticity of about 0.5 or more, for example, about 0.5 or more. Examples of the catalyst system include a bridged transition metal compound having a ligand and a cocatalyst such as organoaluminum.

Examples of the crosslinked transition metal compound constituting such a catalyst system include diphenylmethylene (cyclopentadienyl) fluorenylhafnium dichloride and diphenylmethylene (cyclopentadienyl) fluoride described in the above literature. Oleynyl zirconium dichloride, isopropyl (cyclopentadienyl-1-fluorenyl) hafnium dichloride, or isopropyl (cyclopentadienyl-1-fluorenyl) zirconium dichloride, (t-butylamido) dimethyl (fluorenyl) silane titanium dimethyl, diphenyl methylene (cyclopentane Dienyl) fluorenylzirconium dichloride and the like.

Examples of the organic aluminum include aluminoxane and alkylaluminum. As the aluminoxane, the aluminoxane (d
The same aluminoxane as in 1) can be used.

In the catalyst used in the present invention, olefins such as propylene, ethylene and 1-butene, or these and other olefins may be prepolymerized. The olefin polymerization catalyst used in the present invention,
In addition to the components described above, other components useful for olefin polymerization, such as water as a catalyst component, may be included. <Manufacture of syndiotactic polypropylene>

The syndiotactic polypropylene used in the present invention is obtained by finally synthesizing the propylene and, if necessary, the ethylene and / or α-olefin in the presence of the above-mentioned metallocene catalyst. It can be manufactured by copolymerizing to have various characteristics. The polymerization can be carried out by any of a liquid phase polymerization method such as suspension polymerization and solution polymerization or a gas phase polymerization method.

In the liquid phase polymerization method, the same inert hydrocarbon solvent as used in the above catalyst preparation can be used, and propylene can be used as the solvent. When the polymerization is carried out by a suspension polymerization method, usually -50 to 100
C., preferably at a temperature of 0 to 90 ° C., and when performing by a solution polymerization method, it is usually 0 to 250 ° C.
It is desirable to carry out at a temperature of preferably 20 to 200 ° C. When the polymerization is carried out by a gas phase polymerization method, it is usually 0%.
It is desirable to carry out at a temperature of １２０120 ° C., preferably 20-100 ° C. The polymerization is usually performed at normal pressure to 100 kg / cm.
² , preferably at normal pressure to 50 kg / cm ² .

The polymerization can be carried out in any of a batch system, a semi-continuous system and a continuous system. Further, the polymerization can be performed in two or more stages having different reaction conditions. The molecular weight of the resulting syndiotactic polypropylene can be adjusted by allowing hydrogen to be present in the polymerization system or by changing the polymerization temperature and pressure.

<(Ii) α-olefin-based copolymer>
The olefin-based copolymer contains 50 to 100 mol% of structural units derived from at least one α-olefin selected from α-olefins having 2 to 20 carbon atoms, preferably 60 to 90 mol%. In quantity, more preferably 65
８５85 mol%, with a Young's modulus of 150
It is desirable that the pressure be not more than 100 MPa, preferably not more than 100 MPa, and more preferably not more than 50 MPa. By using at least two kinds of the α-olefin-based copolymer (ii) containing the α-olefin component in such an amount, the compatibility with the syndiotactic polypropylene is improved, and the obtained syndiotactic polypropylene-based composition is obtained. The articles tend to exhibit sufficient flexibility, heat sealability, and impact resistance.

Examples of such α-olefin-based copolymers include, for example, ethylene-propylene copolymers (the first α-olefin being the main constituent, the same applies hereinafter).
Ethylene / butene copolymer, ethylene / pentene copolymer, ethylene / 4-methyl-1-pentene copolymer, ethylene / hexene copolymer, ethylene / heptene copolymer, ethylene / octene copolymer, ethylene Nonene copolymer, ethylene / decene copolymer, ethylene / norbornene copolymer, ethylene / tetracyclododecene copolymer, ethylene / butadiene copolymer, ethylene / isoprene copolymer, ethylene / 1.5-hexadiene 2 such as copolymer, ethylene / acrylic acid copolymer, ethylene / methacrylic acid copolymer, ethylene / acrylic ester copolymer, ethylene / methacrylic ester copolymer, etc.
Original ethylene copolymer, isotactic propylene / ethylene copolymer, atactic propylene /
Ethylene copolymer, syndiotactic propylene
Ethylene copolymer, isotactic propylene / butene copolymer, atactic propylene / butene copolymer, syndiotactic propylene / butene copolymer, isotactic propylene / pentene copolymer, atactic propylene / pentene copolymer Polymer, syndiotactic propylene / pentene copolymer, isotactic propylene / hexene copolymer, atactic propylene / hexene copolymer, syndiotactic propylene / hexene copolymer, isotactic propylene / heptane copolymer Coalescence, atactic propylene / heptane copolymer, syndiotactic propylene / heptane copolymer, isotactic propylene / octene copolymer, atactic propylene / octene copolymer Body, syndiotactic propylene / octene copolymer, isotactic propylene / decene copolymer, atactic propylene / decene copolymer, syndiotactic propylene / decene copolymer, isotactic propylene / styrene copolymer , Atactic propylene / styrene copolymer, syndiotactic propylene / styrene copolymer, isotactic propylene / norbornene copolymer, atactic propylene / norbornene copolymer, syndiotactic propylene / norbornene copolymer, iso Tactic propylene / tetracyclododecene copolymer, atactic propylene / tetracyclododecene copolymer, syndiotactic propylene / tetracyclododecene copolymer, Isotactic propylene / butadiene copolymer, atactic propylene / butadiene copolymer, syndiotactic propylene / butadiene copolymer, isotactic propylene / isoprene copolymer, atactic propylene / isoprene copolymer, syndiotactic Tick propylene / isoprene copolymer, isotactic propylene / 1.5-hexadiene copolymer, atactic propylene / 1.5-hexadiene copolymer, syndiotactic propylene / 1.5-hexadiene copolymer, etc. Binary propylene copolymer, ethylene / propylene / norbornene copolymer, ethylene / butene / norbornene copolymer, ethylene / octene / norbornene copolymer, ethylene / propylene / tetracyclod Decene copolymer, ethylene / butene / tetracyclododecene copolymer, ethylene / octene / tetracyclododecene copolymer, ethylene / propylene / butadiene copolymer, ethylene / butene / butadiene copolymer, ethylene / octene -Butadiene copolymer, ethylene-propylene-isoprene copolymer, ethylene-butene-isoprene copolymer, ethylene-octene-isoprene copolymer, ethylene-propylene-ethylidene norbornene copolymer, ethylene-butene-ethylidene norbornene copolymer Polymers, tertiary ethylene copolymers such as ethylene-octene-ethylidene norbornene copolymer, isotactic propylene-butene-ethylene copolymer, atactic propylene-butene-ethylene copolymer, syndiotacticity Propylene / butene / ethylene copolymer, isotactic propylene / octene / ethylene copolymer, atactic propylene / octene / ethylene copolymer, syndiotactic propylene / octene / ethylene copolymer, isotactic propylene / Octene / ethylene copolymer, atactic propylene / octene / ethylene copolymer, syndiotactic propylene / octene / ethylene copolymer, isotactic propylene / norbornene / ethylene copolymer, atactic propylene / norbornene / ethylene copolymer Polymer, syndiotactic propylene / norbornene / ethylene copolymer, isotactic propylene / tetracyclododecene / ethylene copolymer, atactic propylene / Tiger cyclododecene-ethylene copolymer, syndiotactic propylene-tetracyclododecene-ethylene copolymer,
Isotactic propylene / butadiene / ethylene copolymer, atactic propylene / butadiene / ethylene copolymer, syndiotactic propylene / butadiene / ethylene copolymer, isotactic propylene / isoprene / ethylene copolymer, atactic propylene Ternary propylene copolymers such as isoprene / ethylene copolymer and syndiotactic propylene / isoprene / ethylene copolymer.

Such an α-olefin copolymer is as follows:
The intrinsic viscosity [η] measured in decalin at 135 ° C. is usually 0.01 to 10 dl / g, preferably 0.5 to 10 dl.
/ G, more preferably in the range of 1 to 8 dl / g. When the intrinsic viscosity [η] of the α-olefin-based copolymer (ii) is within the above range, it has excellent properties such as weather resistance, ozone resistance, heat aging resistance, low-temperature properties, and dynamic fatigue resistance. It becomes a syndiotactic polypropylene-based composition.

The α-olefin copolymer (ii) has a single glass transition temperature and has a differential scanning calorimeter (DS
The glass transition temperature (Tg) measured by C) is usually -5C or lower, preferably -80C to -5C, more preferably -80C to -10C, and particularly preferably -80C or more.
It is desirable to be in the range of −20 ° C. When the glass transition temperature (Tg) of the α-olefin-based copolymer (ii) is within the above range, excellent cold resistance and low-temperature properties are obtained.

The molecular weight distribution (M
w / Mn, in terms of polystyrene, Mw: weight average molecular weight,
Mn: number average molecular weight) is preferably 4.0 or less, and more preferably 3.5 or less.

When two or more α-olefin-based copolymers (ii) are used, when the main constituent components are the same, the regularity is preferably different. For example, isotactic propylene / ethylene copolymer and atactic propylene / ethylene
Combination of ethylene copolymer, combination of isotactic propylene / ethylene copolymer and syndiotactic propylene / ethylene copolymer, combination of atactic propylene / ethylene copolymer and syndiotactic propylene / ethylene copolymer, Combination of isotactic propylene / butene copolymer and atactic propylene / butene copolymer, combination of isotactic propylene / butene copolymer and syndiotactic propylene / butene copolymer, atactic propylene / butene copolymer A combination of a coalescable and a syndiotactic propylene / butene copolymer is exemplified.

<Catalyst for Production of α-Olefin Copolymer (ii)> Such α-olefin copolymer (ii) is obtained by copolymerization in the presence of the following metallocene catalyst. Can be.

As such a metallocene catalyst, a transition metal complex (a2) represented by the following general formula (I) or (II):

[0084]

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[In the formulas (I) and (II), M is Ti, Zr,
Hp, Rn, Nd, Sm or Ru, Cp ¹ and Cp ² are a cyclopentadienyl group, an indenyl group, a fluorenyl group or a derivative group thereof bonded to M by π, and X ¹ and X ² are , An anionic ligand or a neutral Lewis base ligand, Y is a ligand containing a nitrogen atom, an oxygen atom, a phosphorus atom, or a sulfur atom, and Z is C, O, B, S, Ge, Si or Sn atom or a group containing these atoms. And at least one catalyst system comprising at least one compound selected from the following components (b2), (c2) and (d2). (B2): a compound that reacts with the transition metal M in the component (a2) to form an ionic complex (also referred to as an ionized ionic compound) (c2): an organoaluminum compound (d2): aluminoxane

<Transition metal complex (a2)> First, the transition metal complex (a) represented by the following general formula (I) used in the present invention:
2) will be described.

[0087]

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[In the formula (I), M is Ti, Zr, Hf, R
n, Nd, Sm or Ru, preferably Ti, Z
r or Hf, and Cp ¹ and Cp ² are a cyclopentadienyl group, an indenyl group, a fluorenyl group or a derivative group thereof bonded to M by π, and X ¹ and X ²
Is an anionic ligand or a neutral Lewis base ligand, and Z is a C, O, B, S, Ge, Si or Sn atom or a group containing these atoms, preferably one O, Si or C. ]

In the formula (I), the bonding group Z is preferably C, O,
It is preferably one atom selected from B, S, Ge, Si, and Sn, and this atom may have a substituent such as an alkyl group or an alkoxy group, and the substituents of Z are mutually bonded. To form a ring. Of these, Z is preferably selected from O, Si and C.

Cp ¹ and Cp ² are ligands that coordinate to the transition metal, and specifically include cyclopentadienyl group, indenyl group, 4,5,6,7-tetrahydroindenyl group, fluorenyl group And the like having a cyclopentadienyl skeleton. The ligand having a cyclopentadienyl skeleton may have a substituent such as an alkyl group, a cycloalkyl group, a trialkylsilyl group, and a halogen atom.

X ¹ and X ² are anionic ligands or neutral Lewis base ligands, and specifically include a hydrocarbon group having 1 to 12 carbon atoms, an alkoxy group, an aryloxy group and a sulfone group. Acid-containing group (—SO ₃ R ^a , where R ^a is an alkyl group, an alkyl group substituted with a halogen atom, an aryl group, an aryl group substituted with a halogen atom, or an aryl group substituted with an alkyl group. ), A halogen atom, a hydrogen atom and the like.

Specific examples of the transition metal compound represented by the general formula (I) include diphenylmethylene (cyclopentadienyl) fluorenylhafnium dichloride and diphenylmethylene (cyclopentadienyl) fluorenylzirconium. Dichloride, isopropyl (cyclopentadienyl-1-fluorenyl) hafnium dichloride, or isopropyl (cyclopentadienyl-1-fluorenyl) zirconium dichloride, (t-butylamido) dimethyl (fluorenyl) silanetitanium dimethyl, diphenylmethylene (cyclopentadienyl)
Fluorenyl zirconium dichloride, rac-dimethylsilylene-bis {1- (2,7-dimethyl-4-ethylindenyl)} zirconium dichloride, rac-dimethylsilylene
-Bis {1- (2,7-dimethyl-4-n-propylindenyl)}
Zirconium dichloride, rac-dimethylsilylene-bis {1- (2,7-dimethyl-4-i-propylindenyl)} zirconium dichloride, rac-dimethylsilylene-bis
(2,7-dimethyl-4-n-butylindenyl)｝ zirconium dichloride, rac-dimethylsilylene-bis ｛1- (2,7-
Dimethyl-4-sec-butylindenyl)｝ zirconium dichloride, rac-dimethylsilylene-bis ｛1- (2,7-dimethyl-4-t-butylindenyl)｝ zirconium dichloride, rac-dimethylsilylene-bis ｛1 -(2,7-dimethyl-4-
n-pentylindenyl) zirconium dichloride, ra
c-dimethylsilylene-bis {1- (2,7-dimethyl-4-n-hexylindenyl)} zirconium dichloride, rac-dimethylsilylene-bis {1- (2,7-dimethyl-4-cyclohexylindenyl) ｝ Zirconium dichloride, rac-dimethylsilylene-bis ｛1- (2,7-dimethyl-4-methylcyclohexylindenyl)｝ zirconium dichloride, rac-dimethylsilylene-bis ｛1- (2,7-dimethyl-4-phenyl Ethylindenyl)｝ zirconium dichloride, rac-dimethylsilylene-bis ｛1- (2,7-dimethyl-4-phenyldichloromethylindenyl)｝ zirconium dichloride, ra
c-dimethylsilylene-bis {1- (2,7-dimethyl-4-chloromethylindenyl)} zirconium dichloride, rac-dimethylsilylene-bis {1- (2,7-dimethyl-4-trimethylsilylenemethylindenyl) )｝ Zirconium dichloride, rac-dimethylsilylene-bis ｛1- (2,7-dimethyl-4-)
Trimethylsiloxymethylindenyl)｝ zirconium dichloride, rac-diethylsilylene-bis ｛1- (2,7-dimethyl-4-i-propylindenyl)｝ zirconium dichloride, rac-di (i-propyl) silylenebis ｛1- (2,7-
Dimethyl-4-i-propylindenyl) zirconium dichloride, rac-di (n-butyl) silylenebis 1- (2,7-
Dimethyl-4-i-propylindenyl) zirconium dichloride, rac-di (cyclohexyl) silylene bis
(2,7-dimethyl-4-i-propylindenyl) zirconium dichloride, rac-methylphenylsilylenebis
(2,7-dimethyl-4-i-propylindenyl) zirconium dichloride, rac-methylphenylsilylenebis
(2,7-dimethyl-4-t-butylindenyl)｝ zirconium dichloride, rac-diphenylsilylenebis ｛1- (2,7-
Dimethyl-4-t-butylindenyl)｝ zirconium dichloride, rac-diphenylsilylenebis ｛1- (2,7-dimethyl-4-i-propylindenyl)｝ zirconium dichloride, rac-diphenylsilylenebis ｛1- ( 2,7-dimethyl-4
-Ethylindenyl) zirconium dichloride, rac-
Di (p-tolyl) silylenebis {1- (2,7-dimethyl-4-i-
Propylindenyl) zirconium dichloride, rac-
Di (p-chlorophenyl) silylenebis {1- (2,7-dimethyl-4-i-propylindenyl)} zirconium dichloride, rac-dimethylsilylenebis {1- (2-methyl-4-i-propyl-7-) Ethylindenyl)｝ zirconium dibromide rac-dimethylsilylene-bis ｛1- (2,7-dimethyl-4-i-
Propyl-1-indenyl) zirconium dimethyl, rac-dimethylsilylene-bis {1- (2,7-dimethyl-4-i-propyl)
-1-indenyl) zirconium methyl chloride, rac-dimethylsilylene-bis {1- (2,7-dimethyl-4-i-propyl-1)
-Indenyl) zirconium-bis ｛1- (trifluoromethanesulfonato), rac-dimethylsilylene-bis ｛1-
(2,7-dimethyl-4-i-propyl-1-indenyl) zirconium-bis {1- (p-phenylsulfinato), rac-dimethylsilylene-bis {1- (2-phenyl-4-i- Propyl-7-
Methyl-1-indenyl) zirconium dichloride, dimethyl (t-butylamide) (tetramethyl-η ⁵ -cyclopentadienyl) silylene) titanium dichloride, ((t-butylamide) (tetramethyl-η ⁵ -cyclopentadienyl) -1,2-ethanediyl) titanium dichloride, (dimethyl (phenylamide) (tetramethyl-η ⁵ -cyclopentadienyl) silylene) titanium dichloride, (dimethyl (t-butylamide) (tetramethyl-η ⁵ -cyclopentadiyl) (Enyl) silylene) titanium dimethyl, (dimethyl (4
-Methylphenylamide) (tetramethyl-η ⁵ -cyclopentadienyl) silylene) titanium dichloride, (dimethyl (t-butylamide) (η ⁵ -cyclopentadienyl)
(Silylene) titanium dichloride, (tetramethyl (t-butylamide) (tetramethyl-η ⁵ -cyclopentadienyl) disilylene) titanium dichloride, (t-butylamido) dimethyl (fluorenyl) silanetitanium dimethyl,
(Cyclopentadienyl) fluorenylhafnium dichloride, di (cyclopentadienyl) fluorenylzirconium dichloride, bis {1- (2,7-dimethyl-4-ethylindenyl)} zirconium dichloride, bis (cyclopentadiene) Dienyl) hafnium dichloride, bis (cyclopentadienyl) zirconium dichloride, bisindenylhafnium dichloride, bisindenylzirconium dichloride, bis {1- (2,7-dimethyl-4-n-propylindenyl)} zirconium dichloride , Bis {1- (2,7-dimethyl-4-i-propylindenyl)} zirconium dichloride, bis {1- (2,7-dimethyl-4-n-butylindenyl)} zirconium dichloride, bis -
(2,7-dimethyl-4-sec-butylindenyl)｝ zirconium dichloride, bis ｛1- (2,7-dimethyl-4-t-butylindenyl)｝ zirconium dichloride, bis ｛1- (2,
7-dimethyl-4-n-pentylindenyl) zirconium dichloride, bis {1- (2,7-dimethyl-4-n-hexylindenyl)} zirconium dichloride, bis {1- (2,7-
Dimethyl-4-cyclohexylindenyl) zirconium dichloride, bis {1- (2,7-dimethyl-4-methylcyclohexylindenyl)} zirconium dichloride, bis {1- (2,7-dimethyl-4-phenylethylindene) Nil)｝ zirconium dichloride, bis ｛1- (2,7-dimethyl-4-phenyldichloromethylindenyl)｝ zirconium dichloride, bis ｛1- (2,7-dimethyl-4-chloromethylindenyl)｝ zirconium Dichloride, bis ｛1-
(2,7-dimethyl-4-trimethylsilylenemethylindenyl)｝ zirconium dichloride, bis ｛1- (2,7-dimethyl-4-trimethylsiloxymethylindenyl)｝ zirconium dichloride, bis ｛1- (2,7 -Dimethyl-4-ethylindenyl) zirconium dichloride, bis {1- (2-
Methyl-4-i-propyl-7-ethylindenyl) zirconium dibromide, bis {1- (2,7-dimethyl-4-i-propyl-1-indenyl) zirconium dimethyl, bis {1- (2,
7-dimethyl-4-i-propyl-1-indenyl) zirconium methyl chloride, bis {1- (2,7-dimethyl-4-i-propyl-1-indenyl) zirconium-bis} 1- (trifluoromethanesulfonate ), Bis ｛1- (2,7-dimethyl-4-i-)
Propyl-1-indenyl) zirconium-bis {1- (p-phenylsulfinato), bis {1- (2-phenyl-4-i-propyl-7-methyl-1-indenyl) zirconium dichloride and the like. .

Further, metallocene compounds in which zirconium metal is replaced with titanium metal or hafnium metal in the above compounds can also be exemplified. Next, the transition metal complex (a2) represented by the following general formula (II) used in the present invention will be described.

[0094]

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[In the above formula (II), M is a transition metal belonging to Group 4 of the periodic table or a lanthanide series.
i, Zr, Hf, Rn, Nd, Sm or Ru, preferably Ti, Zr, Hf. ]

Cp ¹ is a cyclopentadienyl group, an indenyl group, a fluorenyl group or a derivative group thereof bonded to M by π. To elaborate further, Cp ¹ is
A ligand having a cyclopentadienyl skeleton such as a cyclopentadienyl group, an indenyl group, a fluorenyl group or a derivative group thereof. The ligand may have a substituent such as an alkyl group, a cycloalkyl group, a trialkylsilyl group, or a halogen atom.

X ¹ and X ² are anionic ligands or neutral Lewis base ligands, which may be the same or different and are each a hydrogen atom or a halogen atom,
Or a hydrocarbon group containing not more than 20 carbon atoms, 2
It is a silyl group containing 0 or less silicon atoms or a germyl group containing 20 or less germanium atoms.

Z is carbon, oxygen, sulfur, boron or an element of group 14 of the periodic table (for example, silicon, germanium or tin), preferably any of carbon, oxygen and silicon, and Z is an alkyl group, It may have a substituent such as an alkoxy group, and these substituents may be bonded to each other to form a ring. Further, Z and Y may form a condensed ring.

Specific examples of the transition metal compound represented by the general formula (II) include (t-butylamido) dimethyl
(Fluorenyl) silane titanium dimethyl, (t-butylamido) dimethyl (fluorenyl) silane titanium dichloride,
(t-butylamido) dimethyl (fluorenyl) silane zirconium dimethyl, (t-butylamido) dimethyl (fluorenyl) silane zirconium dichloride, dimethyl (t-butylamido) (tetramethyl-eta ⁵ - cyclopentadienyl) silylene) titanium dichloride, { (t-butylamide) (tetramethyl-η ⁵ -cyclopentadienyl) -1,2-ethanediyl titanium dichloride, dimethyl (phenylamide)
(Tetramethyl-η ⁵ -cyclopentadienyl) silylene｝
Titanium dichloride, {dimethyl (t-butylamido) (tetramethyl-eta ⁵ - cyclopentadienyl) silylene} titanium dimethyl, {dimethyl (4-methylphenyl amide) (tetramethyl-eta ⁵ - cyclopentadienyl) silylene} Titanium dichloride, ｛dimethyl (t-butylamide) (η ⁵ -cyclopentadienyl) silylene｝ titanium dichloride, ｛tetramethyl (t-butylamide) (tetramethyl-η ⁵ -cyclopentadienyl) disilylene｝ titanium dichloride, ( t-butylamido) dimethyl (fluorenyl) silanetitanium dimethyl;

The transition metal complexes as described above can be used alone or in combination of two or more. The transition metal complex as described above can also be used by being supported on a particulate carrier.

Examples of such a particulate carrier include Si
O ₂ , Al ₂ O ₃ , B ₂ O ₃ , MgO, ZrO ₂ , CaO, T
inorganic carriers such as iO ₂ , ZnO, SnO ₂ , BaO, and ThO, polyethylene, polypropylene, poly-1-butene,
Organic carriers such as poly-4-methyl-1-pentene and styrene-divinylbenzene copolymer can be used. These particulate carriers can be used alone or in combination of two or more.

In the present invention, the above transition metal complexes are preferably used as the catalyst for olefin polymerization.

Next, a metallocene catalyst is formed.
(B): a compound which reacts with the transition metal M in the component (a) to form an ionic complex, that is, an ionized ionic compound, (c): an organoaluminum compound, and (d): aluminoxane (aluminum oxy compound) ) Will be described.

<Ionized Ionic Compound (b2)> The ionized ionic compound (b2) is composed of the transition metal complex component (a)
The compound reacts with the transition metal M in 2) to form an ionic complex. Examples of such an ionized ionic compound include a Lewis acid, an ionic compound, a borane compound, and a carborane compound. .

As the Lewis acid, a compound represented by BR ₃ (where R is a fluorine atom, a phenyl group which may have a substituent such as a methyl group or a trifluoromethyl group or a fluorine atom). For example, trifluoroboron, triphenylboron, tris (4-fluorophenyl) boron, tris (3,5-difluorophenyl)
Boron, tris (4-fluoromethylphenyl) boron,
Tris (pentafluorophenyl) boron, tris (p-
And tris (o-tolyl) boron and tris (3,5-dimethylphenyl) boron.

Examples of the ionic compound include trialkyl-substituted ammonium salts, N, N-dialkylanilinium salts, dialkylammonium salts, and triarylphosphonium salts. Specifically, trialkyl-substituted ammonium salts include, for example, triethylammonium tetra (phenyl) boron, tripropylammonium tetra (phenyl) boron, tri (n-butyl) boron.
And ammonium tetra (phenyl) boron. Examples of the dialkyl ammonium salt include di (1-propyl) ammonium tetra (pentafluorophenyl) boron and dicyclohexylammonium tetra (phenyl) boron. Further, examples of the ionic compound include triphenylcarbenium tetrakis (pentafluorophenyl) borate, N, N-dimethylaniliniumtetrakis (pentafluorophenyl) borate, and ferrocenium tetra (pentafluorophenyl) borate.

As a borane compound, decaborane (1
4), bis [tri (n-butyl) ammonium] nonaborate, bis [tri (n-butyl) ammonium] decaborate, bis [tri (n-butyl) ammonium] bis (dodecahydride dodecaborate) nickelate (II
And salts of metal borane anions such as I).

Examples of the carborane compound include 4-carbanonaborane (14), 1,3-dicarbanonaborane (13), bis [tri (n-butyl) ammonium] bis (undecahydride-7-carboundecaborate) Salts of metal carborane anions such as nickelate (IV) are exemplified.

The ionized ionic compound as described above is
They can be used alone or in combination of two or more.
The organic aluminum oxy compound or the ionized ionic compound can be used by being supported on the above-mentioned particulate carrier.

In forming the catalyst, the following organic aluminum compound (c2) may be used together with the organic aluminum oxy compound or the ionized ionic compound.

<Organic Aluminum Compound (c2)> As the organoaluminum compound, a compound having at least one Al-carbon bond in a molecule can be used. Examples of such a compound include an organoaluminum compound represented by the following general formula (VI).

(R ¹ ) _m Al (O (R ² )) _n H _p X _q (VI) (wherein R ¹ and R ² may be the same or different, and the number of carbon atoms is Is usually 1 to 15, preferably 1 to 4
X represents a halogen atom, and m represents 0
<M ≦ 3, n is 0 ≦ n <3, p is 0 ≦ p <3, and q is 0 ≦
q <3, and m + n + p + q =
3. Specific examples of such an organoaluminum compound include trialkylaluminums such as trimethylaluminum, triethylaluminum, triisopropylaluminum, triisobutylaluminum, trioctylaluminum, tri (2-ethylhexyl) aluminum, and tridecylaluminum; Alkenyl aluminum such as isoprenyl aluminum; dimethyl aluminum chloride, diethyl aluminum chloride, diisopropyl aluminum chloride, diisobutyl aluminum chloride, dialkyl aluminum halide such as dimethyl aluminum bromide; methyl aluminum sesquichloride, ethyl aluminum sesquichloride, isopropyl aluminum sesquichloride, butyl aluminum Sesquichlori Alkyl aluminum sesquihalides such as ethyl aluminum sesquibromide; alkyl aluminum dihalides such as methyl aluminum dichloride, ethyl aluminum dichloride, isopropyl aluminum dichloride and ethyl aluminum dibromide; and alkyl aluminum hydrides such as diethyl aluminum hydride and diisobutyl aluminum hydride. Can be <Aluminoxane (organic aluminum oxy compound)
(D2)> (d2) The aluminoxane may be a conventionally known aluminoxane.
Or a benzene-insoluble organic aluminum oxy compound as exemplified in Japanese Patent Application Laid-Open No. H10-260,000.

The known aluminoxane is specifically represented by the following general formula (VII).

[0114]

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[In the formula, R is a hydrocarbon group such as a methyl group, an ethyl group, a propyl group and a butyl group, preferably a methyl group, an ethyl group, and particularly preferably a methyl group. m
Is an integer of 2 or more, preferably an integer of 5 to 40. ]

Here, the aluminoxane has the formula (OAl (R
¹⁾ represented alkyloxy aluminum units and formula (OAl (R ²⁾ represented alkyloxy aluminum units (where they are in) is in), R ¹ and R ² are the same hydrocarbon group as R, R ¹ And R ² represent different groups.).

Such an aluminoxane can be used as the component (d)
It can be manufactured by the method described in 1).

The aluminoxane may contain a small amount of an organic compound component of a metal other than aluminum.
In the present invention, the above-mentioned metallocene catalyst is preferably used as the catalyst (olefin catalyst) for producing the amorphous α-olefin copolymer (ii),
In some cases, other than the metallocene catalyst, conventionally known (1) titanium catalyst comprising a solid titanium catalyst component and an organoaluminum compound, (2) a vanadium catalyst comprising a soluble vanadium compound and an organoaluminum compound. It can also be used. <Production of α-olefin copolymer>

In the present invention, propylene, ethylene and the like are usually copolymerized in a liquid phase in the presence of the above-mentioned metallocene catalyst. In this case, a hydrocarbon solvent is generally used, but propylene may be used as the solvent. The copolymerization can be carried out by either a batch method or a continuous method.

When the copolymerization is carried out by a batch method using a metallocene catalyst, the concentration of the metallocene compound in the polymerization system is usually 0.00005 per liter of polymerization volume.
It is desirable to use it in an amount of １1 mmol, preferably 0.0001-0.5 mmol.

The ionized ionic compound (b2) is represented by the molar ratio of the ionized ionic compound to the metallocene compound (ionized ionic compound / metallocene compound).
It is desirably used in such an amount as to be 0.5 to 20, preferably 1 to 10.

When the organoaluminum compound (c2) is used, it is usually used in an amount of about 0 per liter of polymerization volume.
Desirably, it will be used in an amount such that it will be ５5 mmol, preferably about 0-2 mmol.

Organic aluminum oxy compound (d2)
Is the molar ratio (Al / M) of the aluminum atom (Al) to the transition metal atom (M) in the metallocene compound, and 1
It is desirable to use it in such an amount that it becomes 10 to 10,000, preferably 10 to 5000.

In the copolymerization reaction, the temperature is usually -20 to 15
0 ° C, preferably 0 to 120 ° C, more preferably 0 to
In the range of 100 ° C., the pressure exceeds 0 and is ~ 80 kg / cm
² , preferably in a range of more than 0 to 50 kg / cm ² .

The reaction time (average residence time when the copolymerization is carried out by a continuous method) varies depending on the conditions such as the catalyst concentration and the polymerization temperature, but is usually 5 minutes to 3 hours, preferably 10 minutes to 3 hours. Desirably 1.5 hours.

The above-mentioned monomers for copolymerization such as propylene and ethylene are supplied to the polymerization system in such amounts as to obtain the α-olefin-based copolymer (ii) having the above specific composition. At the time of copolymerization, a molecular weight regulator such as hydrogen can be used.

When the copolymerizing monomers such as propylene and ethylene are copolymerized as described above, the α-olefin-based copolymer (ii) is usually obtained as a polymerization solution containing the same. This polymerization solution is treated by a conventional method to obtain an α-olefin copolymer (ii). <Crystal nucleating agent> As the nucleating agent to be used if necessary, various known nucleating agents can be used without particular limitation. Among them, the following general formulas (IIX) and (I
The crystal nucleating agent represented by X) or (X) is preferably used.

[0128]

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[Wherein, R ¹ is oxygen, sulfur, or a hydrocarbon group having 1 to 10 carbon atoms, R ² and R ³ are hydrogen or a hydrocarbon group having 1 to 10 carbon atoms, and R ² , R ³ may be different even in the same kind, R ² to each other, may have a ring by bonding R ³ s or R ² and R ^3, M is
It is a 1-3 valent metal atom, and n is an integer of 1-3. Specific examples of the nucleating agent represented by the general formula (IIX) include sodium-2,2′-methylene-bis (4,6-di-t-butylphenyl) phosphate and 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-butylfell) phosphate] and aluminum-tris [2,
2′-ethylidene-bis (4,6-di-t-butylphenyl) phosphate] and a mixture of two or more thereof.

[0130]

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[Wherein R ⁴ is hydrogen or C 1 -C 1
0 is a hydrocarbon group, M is a metal atom having 1 to 3 valences, and n is an integer of 1 to 3. Specific examples of the crystal nucleating agent represented by the general formula (IX) include sodium-bis (4-t-butylphenyl) phosphate, sodium-bis (4-methylphenyl) phosphate, and sodium-bis (4-methylphenyl) phosphate. Bis (4-ethylphenyl) phosphate, sodium-bis (4-i-propylphenyl) phosphate, sodium-bis (4-t-octylphenyl) phosphate, potassium-bis (4-t-butylphenyl) phosphate Fate, 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 the like Examples thereof include a mixture of two or more kinds.

[0132]

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(Wherein R ⁵ is hydrogen or C 1 -C 1)
0 hydrocarbon group. As the nucleating agent represented by the general formula (X), specifically, 1,3,2,4-dibenzylidene sorbitol, 1,3-benzylidene-2,4-p-methylbenzylidene sorbitol, 1,3
-Benzylidene-2,4-p-ethylbenzylidenesorbitol, 1,3-p-methylbenzylidene-2,4-benzylidenesorbitol, 1,3-p-ethylbenzylidene-2,4-benzylidenesorbitol, 1,3-p -Methylbenzylidene-2,4-p-ethylbenzylidenesorbitol, 1,3-p-ethylbenzylidene-2,4-p-methylbenzylidenesorbitol, 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-chlorobenzylidenesorbitol, 1,3-p-chlorobenzylidene-2,4-benzylidenesorbitol, 1,3-p-chlorobenzylidene-2,4-p-methylbenzylidenesorbitol, 1 , 3-p-Chlorbenzylidene-
2,4-p-ethylbenzylidenesorbitol, 1,3-p-methylbenzylidene-2,4-p-chlorobenzylidenesorbitol, 1,3-p-ethylbenzylidene-2,4-p-chlorobenzylidenesorbitol and 1, 3,2,4-di (p-chlorobenzylidene) sorbitol and a mixture of two or more thereof, among which 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-
Methylbenzylidene sorbitol, 1,3,2,4-di (p-chlorobenzylidene) sorbitol and a mixture of two or more thereof are preferably used.

Examples of other crystal nucleating agents include metal salts of aromatic carboxylic acids and aliphatic carboxylic acids. Specifically, aluminum benzoate, pt-butyl aluminum benzoate, sodium adipate, Examples include sodium phenecarboxylate and sodium pyrrolecarboxylate.

Such a crystal nucleating agent is used in an amount of 100 parts by weight of the syndiotactic polypropylene composition.
It is preferably contained in an amount of 0.01 to 1 part by weight, more preferably 0.01 to 0.8 part by weight. <Syndiotactic polypropylene-based composition> The syndiotactic polypropylene-based composition according to the present invention comprises the syndiotactic polypropylene (i),
And two or more α-olefin-based copolymers (ii), and the weight ratio of the weight of the (i) to the total weight of the two or more (ii) ｛(i) / (( ii) is 90 / 10-1
0/90, preferably 80/20 to 20/80, and more preferably 75/25 to 40/60. Each α-olefin-based copolymer is at least 1% by weight, more preferably at least 2% by weight, particularly preferably at least 4% by weight.
Desirably, it is contained in an amount of at least% by weight. As described above (i), containing (ii), further adding a nucleating agent, the resulting syndiotactic polypropylene-based composition, transparency, flexibility, heat sealability, It tends to have excellent impact resistance.

A molded article comprising such a syndiotactic polypropylene composition has a melt flow rate (ASTM D 1238, 230 ° C., load 2.16 kg) of usually 0.001.
01 to 1000 g / 10 min, preferably 0.0001 to
900 g / 10 min, more preferably 0.0001 to 8
The intrinsic viscosity [η] measured in decahydronaphthalene at 135 ° C. is usually 0.01 to 1
0 dl / g, preferably 0.05 to 10 dl / g, more preferably 0.1 to 10 dl / g.

Further, the melt tension (MT) of the syndiotactic polypropylene composition according to the present invention.
Is usually 0.5 to 10 g, preferably 1 to 10 g, and is excellent in moldability such as film moldability. The melt tension (MT) was measured with a melt tension tester (manufactured by Toyo Seiki Seisaku-sho, Ltd.) at a measurement temperature of 20.
It was determined as the tension applied to the filament when the strand extruded under the condition of 0 ° C. and the extrusion speed of 15 mm / min was taken out at a constant speed (10 m / min).

The syndiotactic polypropylene-based composition as described above can be prepared by mixing the components in various known manners within the above-mentioned range, for example, using a Henschel mixer, a V-blender, a ribbon blender, a tumbler blender, or the like, or After mixing, single screw extruder, twin screw extruder,
After melt-kneading with a kneader, a Banbury mixer or the like, it can be manufactured by employing a method of granulating or pulverizing.

The syndiotactic polypropylene composition contains a heat stabilizer, a weather stabilizer, an antistatic agent,
Pigments, dyes, rust inhibitors, “other copolymers” (elastomer) described in detail below, and the like can be blended as long as the object of the present invention is not impaired. <Other copolymers> The syndiotactic polypropylene composition according to the present invention may contain "other copolymers" (elastomer, resin for elastomer) as necessary.

Examples of such “other copolymers” include ethylene / α-olefin random copolymer (P), optionally hydrogenated aromatic hydrocarbon block copolymer (Q), ethylene copolymer -Α-olefin block copolymer (R), ethylene / diene copolymer (S),
And ethylene / triene copolymer (T). These copolymers are used alone or in combination of two or more.

These “other copolymers” include the syndiotactic polypropylene (i) and two or more α-olefin-based copolymers (ii) contained in the syndiotactic polypropylene-based composition of the present invention. May be included in an amount of usually 0 to 40 parts by weight based on 100 parts by weight in total. When other copolymers are used in the above amounts, a composition capable of producing a molded article having an excellent balance between rigidity, hardness, transparency and impact resistance is obtained.

<Ethylene / α-olefin random copolymer (P)> The ethylene / α-olefin random copolymer (P) used in the present invention has a density of 0.8.
60 g / cm ³ or more 0.895 g / cm less than ^3, preferably a 0.860~0.890g / cm ^3, a melt flow rate (MFR; ASTMD 1238,190 ℃, load 2.16k
g) is 0.5 to 30 g / 10 min, preferably 1 to 20 g
/ 10 minutes is preferable.

The α-olefin to be copolymerized with ethylene is an α-olefin having 3 to 20 carbon atoms, and specifically, propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, -Octene, 1-nonene, 1-decene,
1-undecene, 1-dodecene, 1-hexadedecene, 1-octadecene, 1-nonadecene, 1-eicosene, 4-methyl-1-
Penten and the like. Of these, α-olefins having 3 to 10 carbon atoms are preferred. These α-
The olefins are used alone or in combination of two or more.

The ethylene / α-olefin random copolymer (P) contains 60 to 90 units derived from ethylene.
It is desirable to contain the unit derived from the α-olefin having 3 to 20 carbon atoms in the amount of 10 to 40 mol% in the amount of mol%.

The ethylene / α-olefin random copolymer (P) contains, besides these units, units derived from other polymerizable monomers as long as the object of the present invention is not impaired. Is also good.

Examples of such other polymerizable monomers include:
For example, vinyl compounds such as vinylcyclopentene, vinylcyclohexane and vinylnorbornane; vinyl esters such as vinyl acetate; unsaturated organic acids such as maleic anhydride or derivatives thereof; butadiene, isoprene, pentadiene, 2,3-dimethylbutadiene, and the like. Conjugated dienes;
1,4-hexadiene, 1,6-octadiene, 2-methyl-1,5-
Hexadiene, 6-methyl-1,5-heptadiene, 7-methyl
-1,6-octadiene, dicyclopentadiene, cyclohexadiene, dicyclooctadiene, methylenenorbornene, 5-vinylnorbornene, 5-ethylidene-2-norbornene, 5-methylene-2-norbornene, 5-isopropylidene-2- Norbornene, 6-chloromethyl-5-isopropylene-2-norbornene, 2,3-diisopropylidene-5-norbornene, 2-ethylidene-3-isopropylidene-5-norbornene, 2-propenyl-2,2-norbornadiene, etc. Non-conjugated polyenes.

The ethylene / α-olefin random copolymer (P) contains units derived from such other polymerizable monomers in an amount of 10 mol% or less, preferably 5 mol% or less, more preferably 3 mol% or less. May be contained.

Specific examples of the ethylene / α-olefin random copolymer (P) include an ethylene / propylene random copolymer, an ethylene / 1-butene random copolymer, and an ethylene / propylene / 1-butene random copolymer. Polymers include ethylene / propylene / ethylidene norbornene random copolymer, ethylene / 1-hexene random copolymer, ethylene / 1-octene random copolymer and the like. Among them, ethylene / propylene random copolymer, ethylene / 1-butene random copolymer, ethylene / 1-hexene random copolymer, ethylene / 1-octene random copolymer and the like are particularly preferably used.
In addition, two or more of these copolymers may be used in combination.

The ethylene / α-
The olefin random copolymer (P) has a degree of crystallinity measured by an X-ray diffraction method of usually 40% or less, preferably 0 to 39%, more preferably 0 to 35%.

The above-mentioned ethylene / α-olefin random copolymer can be produced by a conventionally known method using a vanadium catalyst, a titanium catalyst or a metallocene catalyst.

The ethylene / α-olefin random copolymer (P) is used in the syndiotactic polypropylene composition in an amount of usually 0 to 40% by weight, preferably 0 to 35% by weight.
It may be included in amounts by weight.

When the ethylene / α-olefin random copolymer (P) is used in the above-mentioned amount, a composition can be obtained which can prepare a molded article having an excellent balance of rigidity, hardness, transparency and impact resistance. .

<Optionally Hydrogenated Aromatic Hydrocarbon-Based Block Copolymer (Q)> The optionally hydrogenated aromatic hydrocarbon-based block copolymer (Q) used as an elastomer in the present invention. ) Is an aromatic vinyl / conjugated diene block copolymer (Q1) composed of a block polymerized unit (X) derived from aromatic vinyl and a block polymerized unit (Y) derived from conjugated diene, and a hydrogenated product thereof. Q2)
It is.

The form of the aromatic vinyl / conjugated diene block copolymer (Q1) having such a structure is, for example, X (Y
X) _n or (XY) _n [n is an integer of 1 or more]. Among them, a block copolymer in the form of X (YX) _n , particularly XYX, is preferable, and specifically, in the form of polystyrene-polybutadiene (or polyisoprene or polyisoprene-butadiene) -polystyrene. Styrene block copolymers are preferred.

In such a styrene-based block copolymer, the aromatic vinyl block polymerization unit (X), which is a hard segment, exists as a bridge point of the conjugated diene block polymerization unit (Y) to form a physical crosslink (domain). Has formed. The conjugated diene block polymerization unit (Y) existing between the aromatic vinyl block polymerization units (X) is a soft segment and has rubber elasticity.

As the aromatic vinyl forming the above-mentioned block polymerized unit (X), specifically, in addition to styrene, α-methylstyrene, 3-methylstyrene, p-methylstyrene, 4-propylstyrene And styrene derivatives such as 4-dodecylstyrene, 4-cyclohexylstyrene, 2-ethyl-4-benzylstyrene, and 4- (phenylbutyl) styrene. Of these, styrene is preferred.

Examples of the conjugated diene forming the block polymerized unit (Y) include butadiene, isoprene, pentadiene, 2,3-dimethylbutadiene and a combination thereof. Of these, butadiene or isoprene or a combination of butadiene and isoprene is preferred.

When the conjugated diene block polymerized unit (Y) is derived from butadiene and isoprene, the unit preferably contains the unit derived from isoprene in an amount of 40 mol% or more.

The conjugated diene block polymerization unit (Y) composed of butadiene / isoprene copolymerization unit
Is a random copolymerized unit of butadiene and isoprene,
It may be either a block copolymer unit or a tapered copolymer unit.

The above aromatic vinyl / conjugated diene block copolymer (Q1) has an aromatic vinyl block polymerization unit (X) content of 22% by weight or less, preferably 5 to 22% by weight. . The content of the aromatic vinyl polymerized unit can be measured by a conventional method such as infrared spectroscopy and NMR spectroscopy.

The aromatic vinyl / conjugated diene block copolymer (Q1) has a melt flow rate (MFR; ASTM).
D 1238, 200 ° C, load 2.16 kg) is usually 5 g / 10 min or more, preferably 5 to 100 g / 10 min.

The method for producing the above-mentioned aromatic vinyl / conjugated diene block copolymer (Q1) includes various methods, for example, (1) using an alkyllithium compound such as n-butyllithium as an initiator. As a method of sequentially polymerizing an aromatic vinyl compound and then a conjugated diene, (2)
A method of polymerizing an aromatic vinyl compound and then a conjugated diene, and coupling this with a coupling agent, (3)
A method of sequentially polymerizing a conjugated diene and then an aromatic vinyl compound using a lithium compound as an initiator can be used.

The hydrogenated aromatic vinyl / conjugated diene block copolymer (Q2) is obtained by hydrogenating the above aromatic vinyl / conjugated diene block copolymer (Q1) by a known method. Can be obtained by Hydrogenated aromatic vinyl / conjugated diene block copolymer (Q2)
It is usually preferable that the hydrogenation ratio is 90% or more.

This hydrogenation ratio is a value when the total amount of carbon-carbon double bonds in the conjugated diene block polymerization unit (Y) is 100%. Specific examples of the hydrogenated product (Q2) of the aromatic vinyl / conjugated diene block copolymer include a hydrogenated product of a styrene / isoprene block copolymer (SEP) and a styrene / isoprene / styrene block copolymer. Hydrogenated polymer (SEPS; polystyrene / polyethylene / propylene / polystyrene block copolymer),
Hydrogenated styrene-butadiene block copolymer (SE
BS; polystyrene / polyethylene / butylene / polystyrene block copolymer), and more specifically, HYBRAR [manufactured by Kuraray Co., Ltd.], Clayton [manufactured by Shell Chemical Co., Ltd.], Carifrex TR [shell chemical] Co., Ltd.), Solprene (manufactured by Philips Petro Rifam), Europrene SOLT (manufactured by Anich), Tufprene (manufactured by Asahi Kasei Kogyo), Solprene-T (manufactured by Nippon Elastomer), JSR-TR [Nihon Gosei Rubber Co., Ltd.], Electrified STR [Electrical Chemical Industry Co., Ltd.]
And Quintac [manufactured by Zeon Corporation], Clayton G [manufactured by Shell Chemical Co., Ltd.], Tuftec [manufactured by Asahi Chemical Industry Co., Ltd.] (all trade names) and the like.

As the hydrogenated product (Q2) of the aromatic vinyl / conjugated diene block copolymer, among these, SEB
S and SEPS are preferably used. The aromatic hydrocarbon-based block copolymer (Q) which may be hydrogenated may be contained in the polypropylene composition in an amount of usually 0 to 30% by weight, preferably 0 to 25% by weight. . Aromatic hydrocarbon block copolymer (Q) which may be hydrogenated
Is used in the above amounts, a composition can be obtained which can prepare a molded article having an excellent balance of rigidity and hardness, transparency and impact resistance.

<Ethylene / α-olefin block copolymer (R)> The ethylene / α-olefin block copolymer (R) used as the elastomer in the present invention.
Is a crystalline polyethylene portion composed of 0 to 20 mol% of a structural unit derived from an olefin having 3 to 10 carbon atoms, and 100 to 80 mol% of a structural unit derived from ethylene; A low-crystalline copolymer part or an amorphous copolymer part containing two or more types of structural units derived from olefins.

In the present invention, the constitutional unit derived from ethylene is contained in an amount of 30 to 95 mol% and has 3 carbon atoms.
A structural unit derived from an olefin of from 20 to 70 to 5
Ethylene / α-olefin block copolymers contained in an amount of mol% are preferred. In particular, ethylene · α in which the constituent unit derived from ethylene is contained in an amount of 60 to 90 mol% and the constituent unit derived from an olefin having 3 to 20 carbon atoms is contained in an amount of 40 to 10 mol%.
-Olefin block copolymers are preferred.

The olefin having 3 to 20 carbon atoms specifically includes propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene and 3-methyl-1
-Pentene, 1-octene, 3-methyl-1-butene, 1-decene, 1-dodecene, 1-tetradodecene, 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 , 5,8,8a-Octahydronaphthalene and the like.

The above structural units derived from an olefin having 3 to 20 carbon atoms or ethylene may be used alone or
More than one species may be contained. Further, the ethylene / α-olefin block copolymer used in the present invention includes:
A structural unit derived from a diene compound having 4 to 20 carbon atoms may be contained in an amount of 5 mol% or less.

Specific examples of such a diene compound include 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,
Examples thereof include 1,7-octadiene, 1,9-decadiene, isoprene, butadiene, ethylidene norbornene, vinylnorbornene, and dicyclopentadiene.

Such an ethylene / α-olefin block copolymer (R) has a melt flow rate (MF
R; ASTM D 1238, 190 ℃, load 2.16kg) is usually 0.00
01 to 500 g / 10 min, preferably 0.0001 to 3
00g / 10 min, more preferably 0.0001 to 20
0 g / 10 min, and the density (ASTM D 1505)
0.85 to 0.90 g / cm ³ , preferably 0.85 to 0.90 g / cm ³
0.89 g / cm ³ , more preferably 0.86 to 0.1 g / cm ³ .
Desirably, it is 89 g / cm ³ .

The crystallinity of the boiling heptane-insoluble component in the copolymer (R) measured by X-ray diffraction is usually 0 to 30%, preferably 0 to 28%, more preferably 0 to 25%. It is desirable.

The boiling heptane-insoluble component of the ethylene / α-olefin block copolymer (R) is prepared as follows. That is, 3 g of a polymer sample, 20 mg of 2,6-di-tert-butyl-4-methylphenol, and 500 ml of n-decane were placed in a 1-liter flask equipped with a stirrer,
Heat and dissolve on a 45 ° C. oil bath. After the polymer sample is dissolved, it is cooled to room temperature over about 8 hours, and then kept on a 23 ° C. water bath for 8 hours. The n-decane suspension containing the precipitated polymer (23 ° C. decane-insoluble component) was added to G-4 (or G-4
After filtering and separating through a glass filter of -2) and drying under reduced pressure, 1.5 g of the polymer is subjected to Soxhlet extraction with heptane for 6 hours or more to obtain a boiling heptane-insoluble component.

The degree of crystallinity is measured as follows, using the boiling heptane-insoluble component obtained as described above as a sample. That is, a sample was formed into a square plate having a thickness of 1 mm by a pressure molding machine at 180 ° C., and immediately thereafter, measured using a press sheet obtained by cooling with water using a Rotaflex RU300 measuring device manufactured by Rigaku Corporation. (Output 50 kV, 250 mA). As a measuring method at this time, a transmission method is used, and the measurement is performed while rotating the sample.

The density of the boiling heptane-insoluble component of the ethylene / α-olefin block copolymer (R) used in the present invention is usually 0.86 g / cm ³ or more, preferably 0.87 g / cm ³ or more. Is desirable.

Further, the amount of the n-decane-soluble component at 23 ° C. of the ethylene / α-olefin block copolymer (R) is:
It is desirably in the range of 0.1 to 99%, preferably 0.5 to 99%, more preferably 1 to 99%.

In the present invention, the amount of n-decane-soluble component at 23 ° C. of the ethylene / α-olefin block copolymer is measured as follows. That is, 3 g of a polymer sample, 2,6-di-tert-butyl were placed in a 1-liter flask equipped with a stirrer.
-4- 20 mg of methylphenol and 500 ml of n-decane are added and dissolved by heating on an oil bath at 145 ° C. After the polymer sample is dissolved, it is cooled to room temperature over about 8 hours, and then kept on a 23 ° C. water bath for 8 hours. A precipitated polymer,
G-4 (or G-4)
2) Separation by filtration through a glass filter. The solution thus obtained was heated under the conditions of 10 mmHg and 150 ° C., and dried until the polymer dissolved in the n-decane solution was quantified. .Alpha.-olefin block copolymer 2
The amount of the n-decane-soluble component at 3 ° C. is calculated as a percentage based on the weight of the polymer sample.

The ethylene used in the present invention as described above
The α-olefin block copolymer (R) can be prepared by a conventionally known method. Ethylene α-
The olefin block copolymer (R) is used in the polypropylene composition in an amount of usually 0 to 40% by weight, preferably 0 to 3% by weight.
It may be present in an amount of 5% by weight. Ethylene α-
When the olefin block copolymer (R) is used in the above amount, a composition that can prepare a molded article having an excellent balance of rigidity and hardness, transparency and impact resistance is obtained.

<Ethylene / triene copolymer (T)> The ethylene / triene copolymer (T) used as the elastomer in the present invention is a random copolymer of ethylene and triene.

Specific examples of the triene to be copolymerized with ethylene include 6,10-dimethyl-1,5,9-undecatriene, 4,8-dimethyl-1,4,8-decatriene, 5,9 -Dimethyl-1,4,8-decatriene, 6,9-dimethyl-1,5,8-decatriene, 6,8,9-trimethyl-1,5,8-decatriene, 6-ethyl-10-methyl-1 , 5,9-Undecatriene, 4-ethylidene-1,6-octadiene, 7-methyl-4-ethylidene-1,6-
Octadiene, 4-ethylidene-8-methyl-1,7-nonadiene (EMND), 7-methyl-4-ethylidene-1,6-nonadiene, 7-ethyl-4-ethylidene-1,6-nonadiene, 6,7 -
Dimethyl-4-ethylidene-1,6-octadiene, 6,7-dimethyl-4-ethylidene-1,6-nonadiene, 4-ethylidene-
1,6-decadiene, 7-methyl-4-ethylidene-1,6-decadiene, 7-methyl-6-propyl-4-ethylidene-1,6-octadiene, 4-ethylidene-1,7-nonadiene, 8- Methyl
-4-ethylidene-1,7-nonadiene, 4-ethylidene-1,7-
Non-conjugated trienes such as undecadiene; conjugated trienes such as 1,3,5-hexatriene; and the like. These trienes can be used alone or in combination of two or more.

The above-mentioned triene is, for example, EP0
It can be prepared by a conventionally known method as described in JP 691354A1 and WO96 / 20150.

In the ethylene / triene copolymer (T) used in the present invention, the content of the structural unit derived from triene is usually 0.1 to 30 mol%, preferably 0.1 to 20 mol%, and more preferably 0.1 to 20 mol%. Preferably, it is in the range of 0.5 to 15 mol%. It is desirable that the iodine value is usually 1 to 200, preferably 1 to 100, and more preferably 1 to 50.

Also, ethylene / triene copolymer (T)
Has an intrinsic viscosity [η] measured in decahydronaphthalene at 135 ° C. of 0.01 to 10 dl / g, preferably 0.1 to 10 dl / g.
05 to 10 dl / g, more preferably 0.1 to 10 d / g
It is desirably within the range of 1 / g.

The ethylene / triene copolymer (T) as described above can be prepared by a conventionally known method. The ethylene / triene copolymer (T) is usually contained in the syndiotactic polypropylene-based composition in an amount of from 0 to 40.
% By weight, preferably from 0 to 35% by weight. When the ethylene-triene copolymer (T) is used in the above amount, a composition that can prepare a molded article having an excellent balance of rigidity, hardness, transparency, and impact resistance is obtained.

[Molded Article] The syndiotactic polypropylene composition according to the present invention as described above can be widely used for conventionally known polyolefin applications. In particular, the polyolefin composition can be used, for example, in a sheet, unstretched or stretched film. , Filaments, and other molded articles of various shapes.

Specific examples of the molded article include known thermoforming methods such as extrusion molding, injection molding, inflation molding, blow molding, extrusion blow molding, injection blow molding, press molding, vacuum molding, calendar molding, and foam molding. And a molded article obtained by the above method. The molded product will be described below with reference to several examples.

When the molded article according to the present invention is, for example, an extruded molded article, its shape and product type are not particularly limited, but for example, sheets, films (unstretched), pipes,
Examples include hoses, wire coatings, and filaments, and particularly preferred are sheets, films, and filaments.

When extruding the soft composition, conventionally known extruders and molding conditions can be employed. For example, a single screw extruder, a kneading extruder, a ram extruder, a gear extruder, or the like can be used. The molten syndiotactic polypropylene composition can be extruded from a T-die or the like to form a sheet or film (unstretched).

The stretched film is prepared by subjecting the above-mentioned extruded sheet or extruded film (unstretched) to a known stretching method such as a tenter method (longitudinal and transverse stretching, transverse and longitudinal stretching), a simultaneous biaxial stretching method and a uniaxial stretching method. It can be obtained by stretching.

The stretching ratio when stretching a sheet or an unstretched film is usually about 20 to 70 times in the case of biaxial stretching, and usually about 2 to 10 times in the case of uniaxial stretching. It is desirable to obtain a stretched film having a thickness of about 5 to 200 μm by stretching.

Further, an inflation film can be produced as a film-shaped molded product. Drawdown hardly occurs during inflation molding. Sheets and film molded articles made of the syndiotactic polypropylene composition according to the present invention as described above are difficult to be charged, and have flexibility such as tensile elasticity, heat resistance, heat sealability, impact resistance, and aging resistance. , Transparency, transparency, gloss,
It has excellent rigidity, moisture resistance and gas barrier properties, and can be widely used as a packaging film. Press-through packs (press through pac) used for packaging pharmaceutical tablets, capsules, etc., especially because of their excellent moisture resistance.
It is suitably used for k) and the like.

The filament molding can be produced, for example, by extruding a molten polypropylene composition through a spinneret. The filament thus obtained may be further drawn. This stretching may be carried out so that at least the uniaxial direction of the filament is molecularly oriented, and is usually desirably performed at a magnification of about 5 to 10 times. The filament made of the polypropylene-based composition according to the present invention is hardly charged, and is excellent in transparency, rigidity, heat resistance and impact resistance.

The injection molded article can be produced by injection molding a flexible polypropylene composition into various shapes using a conventionally known injection molding apparatus under known conditions.
The injection molded article comprising the syndiotactic polypropylene composition according to the present invention is hardly charged, and has excellent rigidity, heat resistance, impact resistance, surface gloss, chemical resistance, abrasion resistance, etc. It can be used widely for trim materials, exterior materials for automobiles, housings and containers for home appliances, and the like.

The blow molded article can be produced by blow molding a syndiotactic polypropylene composition using a conventionally known blow molding apparatus under known conditions.

For example, in extrusion blow molding, the above syndiotactic polypropylene composition is treated at a resin temperature of 10
It is extruded from a die in a molten state at 0 ° C. to 300 ° C. to form a tubular parison. Then, after the parison is held in a mold having a desired shape, air is blown into the parison, and a resin temperature of 130 ° C.
A hollow molded article can be produced by mounting the mold at 00 ° C. The stretching (blow) magnification is 1.
It is desirable to be about 5 to 5 times.

In the injection blow molding, the syndiotactic polypropylene composition is treated at a resin temperature of 100.
The parison is molded by injecting it into a parison mold at a temperature of about 300 ° C. to 300 ° C., and then the parison is held in a mold having a desired shape. A molded article can be manufactured.
The stretching (blow) magnification is preferably 1.1 to 1.8 times in the longitudinal direction and 1.3 to 2.5 times in the lateral direction.

The blow-molded article comprising the syndiotactic polypropylene composition according to the present invention is excellent in transparency, rigidity, heat resistance and impact resistance, and also excellent in moisture resistance.

Examples of the press-formed body include a mold stamping-formed body. For example, the base material and the skin material are simultaneously formed by press-forming, and the base material according to the present invention is used in the case where the two are combined and integrally formed (mold stamping formation). It can be formed of a syndiotactic polypropylene-based composition.

Specific examples of such a mold stamping molded body include automotive interior materials such as door trim, rear package trim, seat back garnish, and instrument panel.

The syndiotactic polypropylene composition according to the present invention exhibits transparency and high rigidity. For example, it exhibits sufficiently high rigidity even if it contains an elastomer component. Therefore, it can be used for various high rigidity applications. it can. For example, it can be suitably used particularly for applications such as interior and exterior materials of automobiles, housings of home appliances, and various containers.

The press-formed product comprising the syndiotactic polypropylene composition according to the present invention is hardly charged, and has rigidity, heat resistance, transparency, impact resistance, aging resistance, surface gloss, chemical resistance, and abrasion resistance. Excellent in properties.

The syndiotactic polypropylene composition according to the present invention can be suitably used, for example, in the following applications. Film: Multilayer stretched film, multilayer unstretched film, laminate film, shrink film, stretch film, wrap film, protect film, retort film, porous film, barrier film, metallized film, agricultural film Sheet and sheet molded products: wallpaper , Foam sheet, wire covering, prestar packaging, tray, stationery, food container, toy, cosmetic container, medical equipment, detergent container, flooring, cushion floorer, decorative sheet, shoe sole Blow product: bottle Extruded product: tube, wire coating , Cable coating, pipe, gasket Fiber: fiber, flat yarn Non-woven and non-woven products: non-woven fabric, filter Injection products: automotive interior skin materials, automotive exterior materials, daily necessities, home appliances, caps, containers, pallets Modifiers: Adhesive The lubricating oil additive, a hot melt adhesive, toner release agents, pigment dispersing agents, asphalt modifier Others: sealants, vacuum molded product, powder slush body

[0203]

According to the present invention, there is obtained a syndiotactic polypropylene-based composition capable of obtaining a molded article having an excellent balance of transparency, impact resistance, flexibility, heat resistance, scratch resistance and the like. .

[0204]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples.

Hereinafter, physical property test conditions and the like will be described. [Tensile test] Tensile modulus (Young modulus); JIS K6301
According to JIS No. 3 dumbbells, span: 3
It was measured at 23 ° C. at 0 mm and a pulling speed of 30 mm / min. 2. Martens hardness (1 / mm): Using a Martens hardness scratch hardness tester manufactured by Tokyo Ikki, a groove width generated when a sample having a thickness of 3 mm was scratched by applying a load of 20 g of a scratch indenter to the test piece, The reciprocal was calculated. 3. Needle penetration temperature (° C); 2m thick in accordance with JIS K7196
1.8 m at a heating rate of 5 ° C./min using a test piece of m
A pressure of ² kg / cm ² is applied to a flat indenter of mφ, and TMA is applied.
The needle entry temperature (° C.) was determined from the curve. 4. Haze (%): Using a 1 mm thick test piece, Nippon Denshoku Industries Co., Ltd. digital turbidity meter “NDH-20D”
Was measured.

[Melting Point (Tm) and Glass Transition Temperature (T
g)] An endothermic curve of DSC is obtained, and the temperature at the maximum peak position is defined as Tm.

For the measurement, the sample was packed in an aluminum pan,
The temperature was raised to 200 ° C. at a rate of 200 ° C./min, maintained at 200 ° C. for 5 minutes, then decreased to −150 ° C. at a rate of 10 ° C./min,
It was determined from an endothermic curve when the temperature was raised at 0 ° C./min.

From the endothermic peak at the time of DSC measurement, the heat of fusion per unit weight is determined, and this is divided by the heat of fusion of polyethylene crystal 70 cal / g to obtain
The crystallinity (%) can be determined.

[Intrinsic viscosity [η]] It was measured at 135 ° C. in decalin. [Mw / Mn] GPC (gel permeation chromatography) using an orthodichlorobenzene solvent,
It was measured at 140 ° C.

[0210]

[Synthesis Example 1] (Synthesis of syndiotactic polypropylene) According to the method described in Japanese Patent Application Laid-Open No. 2-274773, hydrogen was prepared using a catalyst comprising diphenylmethylene (cyclopentadienyl) fluorenylzirconium dichloride and methylaluminoxane. The syndiotactic polypropylene was obtained by a bulk polymerization method of propylene in the presence of. The melt flow index of the obtained syndiotactic polypropylene was 4.4 g / 10 min, the molecular weight distribution by GPC was 2.3, and ¹³ C
-The syndiotactic pentad fraction (rrrr) measured by NMR was 0.823, the Tm measured by differential scanning calorimetry was 127 ° C, and the Tc was 57 ° C. .

[0211]

[Synthesis Example 2] (Synthesis of atactic propylene / ethylene copolymer)
750 ml of heptane was added to the autoclave at room temperature, followed by triisobutylaluminum (hereinafter TIBA).
0.3 ml of a 1.0 mmol / ml toluene solution of propylene) was added so that the amount of aluminum atoms was 0.3 mmol, and 30 liters of propylene was added under stirring (25 ° C., 25 ° C.).
(1 atm), and the temperature was raised to reach 60 ° C. Thereafter, the system was pressurized with ethylene to 5.9 kg / cm ² G, and (dimethyl (t-butylamide) (tetramethyl-η ⁵ -cyclopentadienyl) silane) dichloride titanium was synthesized by a known method. Toluene solution (0.
0001 mM / ml) and 2.0 ml of a toluene solution of (triphenylcarbenium tetra (pentafluorophenyl) borate (0.001 mM / ml).
In addition, copolymerization of propylene and ethylene was started.
The catalyst concentration at this time was (dimethyl (t-
Butylamido) (tetramethyl-η ⁵ -cyclopentadienyl) silane) dichloride titanium was 0.0005 mmol / l, and triphenylcarbenium tetra (pentafluorophenyl) borate was 0.002 mmol / l. During the polymerization, the internal pressure was maintained at 5.9 kg / cm ² G by continuously supplying ethylene. After 15 minutes, the polymerization reaction was stopped by adding methyl alcohol. After depressurization, the polymer solution was taken out and washed with "an aqueous solution obtained by adding 5 ml of concentrated hydrochloric acid to 1 liter of water" at a ratio of 1: 1 to transfer a catalyst residue to an aqueous phase. After the contact mixed solution was allowed to stand, the aqueous phase was separated and removed, and further washed twice with distilled water to separate the polymerization liquid phase from oil and water. Next, the polymer liquid phase separated from the oil and water was brought into contact with three times the volume of acetone under vigorous stirring to precipitate a polymer, which was then sufficiently washed with acetone, and a solid part (copolymer) was collected by filtration. 130 ° C, 350mmH under nitrogen flow
g for 12 hours. The yield of the propylene / ethylene copolymer obtained as described above was 29 g,
The intrinsic viscosity [η] measured in decalin at 5 ° C. is 3.2 dl.
/ G, a glass transition temperature Tg of -22 ° C, an ethylene content of 16.0 mol%, and an activity of 310 kg.
/ Mmol Zr · hr, and the molecular weight distribution by GPC was 2.6. The Young's modulus was 3 MPa.

[0212]

[Synthesis Example 3] (Synthesis of isotactic propylene / ethylene copolymer) Heptane 7 was added at room temperature to a 1.5-liter autoclave dried under reduced pressure and purged with nitrogen.
Add 50 ml, followed by 1.0 mmol / ml of TIBA
0.3 ml of a toluene solution was added so that the amount of aluminum atoms was 0.3 mmol, and propylene was added under stirring with stirring.
Charge 8 liters (25 ° C, 1 atm), start heating and 6
0 ° C. was reached. Then 5.9 kg of ethylene in the system
/ Cm ² G and synthesized by a known method.
3.75 ml of a toluene solution of ac-dimethylsilylene-bis {1- (2-methyl-4-phenylindenyl) zirconium dichloride (0.0001 mM / ml) and a toluene solution of methylaluminoxane (0.01 mM / m2)
9.38 ml of 1) was added to initiate copolymerization of propylene and ethylene. The catalyst concentration at this time is
rac-dimethylsilylene-bis {1- (2-methyl-4-)
Phenylindenyl) zirconium dichloride 0.0
005 mmol / l, methylaluminoxane 0.
125 mmol / l. During the polymerization, the internal pressure was increased to 5.9 kg / cm by continuously supplying ethylene.
It was held on the ² G. After 15 minutes, the polymerization reaction was stopped by adding methyl alcohol. After depressurization, the polymer solution was taken out and washed with "an aqueous solution obtained by adding 5 ml of concentrated hydrochloric acid to 1 liter of water" at a ratio of 1: 1 to transfer a catalyst residue to an aqueous phase. After the contact mixed solution was allowed to stand, the aqueous phase was separated and removed, and further washed twice with distilled water to separate the polymerization liquid phase from oil and water. Next, the polymer liquid phase separated from the oil and water was brought into contact with three times the volume of acetone under vigorous stirring to precipitate a polymer, which was then sufficiently washed with acetone, and a solid part (copolymer) was collected by filtration. 130 ° C, 3 under nitrogen flow
It was dried at 50 mmHg for 12 hours. The yield of the propylene / ethylene copolymer obtained as described above was 26 g, the intrinsic viscosity [η] measured in decalin at 135 ° C. was 2.8 dl / g, and the glass transition temperature Tg was −47 ° C.
The ethylene content was 30.0 mol%, the activity was 276 kg / mmol Zr · hr, and the molecular weight distribution by GPC was 2.7.

The melting peak measured by DSC was observed but broad, but could not be quantified. The Young's modulus was 3 MPa.

[0214]

[Synthesis Example 4] (Synthesis of syndiotactic propylene / ethylene copolymer) To a 1.5 liter autoclave dried under reduced pressure and purged with nitrogen, 750 ml of heptane was added at room temperature, and then 1.0 mmol / l of TIBA was added. m
1 ml of a toluene solution was added in an amount of 0.3 mmol in terms of aluminum atoms, and 50.7 liters of propylene (25 ° C., 1 atm) was added with stirring, and the temperature was raised. 30 ° C. was reached. Then, the system is pressurized with ethylene to 5.5 kg / cm ² G,
3.75 m of a solution of diphenylmethylene (cyclopentadienyl) fluorenylzirconium dichloride in heptane (0.0002 mM / ml) synthesized by a known method.
1, toluene solution of (triphenylcarbenium tetra (pentafluorophenyl) borate) (0.002 m
(M / ml) was added to start copolymerization of propylene and ethylene. The catalyst concentration at this time was 0.001 mmol / liter of diphenylmethylene (cyclopentadienyl) fluorenylzirconium dichloride and 0.004 mmol / liter of triphenylcarbenium tetra (pentafluorophenyl) borate with respect to the whole system. Liters.

During the polymerization, the internal pressure was maintained at 5.5 kg / cm ² G by continuously supplying ethylene. Thirty minutes after the start of the polymerization, the polymerization reaction was stopped by adding methyl alcohol. After depressurization, the polymer solution was taken out, and the polymer solution was washed with an aqueous solution obtained by adding 5 ml of concentrated hydrochloric acid to 1 liter of water at a ratio of 1: 1. Transferred to the aqueous phase. After the catalyst mixed solution was allowed to stand, the aqueous phase was separated and removed, and further washed twice with distilled water, and the polymerization liquid phase was separated into oil and water. Next, the polymer liquid phase separated from the oil and water was brought into contact with a three-fold amount of acetone under vigorous stirring to precipitate a polymer, which was thoroughly washed with acetone, and a solid part (copolymer) was collected by filtration. 130 ° C, 350mmH under nitrogen flow
g for 12 hours. The yield of the propylene / ethylene copolymer obtained as described above was 50 g,
The intrinsic viscosity [η] measured in decalin at 5 ° C. is 2.4 dl.
/ G, the glass transition temperature Tg was -28 ° C, the ethylene content was 24.0 mol%, and the molecular weight distribution (Mw / Mn) measured by GPC was 2.9. Young's modulus was 2 MPa.

Under the above-mentioned DSC measurement conditions, a melting peak was not substantially observed.

[0219]

[Synthesis Example 5] (Synthesis of atactic propylene / butene copolymer) In a 1.5 liter autoclave dried under reduced pressure and purged with nitrogen, 710 m of heptane was added at room temperature.
Then, 1.0 ml of a 1.0 mmol / ml toluene solution of TIBA was added in an amount of 1.0 mmol in terms of aluminum atoms, and 25 g of 1-butene was inserted with stirring. The temperature was raised to reach 30 ° C. After that, the inside of the system was 6.0 kg / cm ² G with propylene.
And a toluene solution of (dimethyl (t-butylamide) (tetramethyl-η ⁵ -cyclopentadienyl) silane) dichloride titanium synthesized by a known method (0.01 mM / ml) to 0.
75 ml of a toluene solution of methylaluminoxane (1 m
(M / ml) was added to initiate copolymerization of propylene and 1-butene. The catalyst concentration at this time was (dimethyl (t-butylamide) (tetramethyl-η
^{The amount of 5} -cyclopentadienyl) silane) dichloride titanium was 0.01 mmol / l, and that of methylaluminoxane was 6.0 mmol / l.

During the polymerization, propylene is continuously supplied.
And the internal pressure is 6.0 kg / cm. ^TwoG. Heavy
15 minutes after the start of the polymerization, the polymerization reaction
The addition was stopped. After depressurizing, remove the polymer solution
Take out the polymer solution and add 1 liter of water
Aqueous solution to which 5 ml of concentrated hydrochloric acid was added)
Wash the polymer solution using the
Was moved to. After allowing this catalyst mixed solution to stand, the aqueous phase
, And washed twice with distilled water.
Water separated. Next, the polymerization liquid phase separated from the oil-water is 3 times
With strong agitation to precipitate the polymer
After that, the solid part (copolymer) is sufficiently washed with acetone and filtered.
Collected by excess. 130 ° C, 350mm under nitrogen flow
Dried at Hg for 12 hours. The program obtained as described above
The yield of the propylene / butene copolymer was 130 g,
The intrinsic viscosity [η] measured in decalin at 35 ° C. is 1.1 d.
l / g, the glass transition temperature Tg is -8 ° C,
The ten content was 6.2 mol%, measured by GPC
The molecular weight distribution (Mw / Mn) was 2.8. Youngmo
Juras was 5 MPa.

[0219] Under the above-mentioned DSC measurement conditions, a melting peak was not substantially observed.

[0220]

Synthesis Example 6 (Synthesis of syndiotactic propylene / butene copolymer) To a 1.5 liter autoclave dried under reduced pressure and purged with nitrogen, 675 ml of heptane was added at room temperature, and then 1.0 mmol / l of TIBA was added. m
1.0 ml of the 1-toluene solution was added so that the amount became 1.0 mmol in terms of aluminum atoms, 30 g of 1-butene was inserted with stirring, and the temperature was raised to 30 ° C. Then, 6.0 kg /
0.75 ml of a toluene solution of diphenylmethylene (cyclopentadienyl) fluorenylzirconium dichloride (0.01 mM / ml) synthesized by a known method, which was pressurized so as to be cm ² G, and synthesized by a known method. Methylaluminoxane toluene solution (1.0 mM / ml)
Was added to initiate copolymerization of propylene and 1-butene. The catalyst concentration at this time was 0.01 mmol / liter of diphenylmethylene (cyclopentadienyl) fluorenylzirconium dichloride with respect to the whole system,
Methylaluminoxane was 6.0 mmol / l.

During the polymerization, propylene is continuously supplied.
And the internal pressure is 6.0 kg / cm. ^TwoG. Heavy
15 minutes after the start of the polymerization, the polymerization reaction
The addition was stopped. After depressurizing, remove the polymer solution
Take out the polymer solution and add 1 liter of water
Aqueous solution to which 5 ml of concentrated hydrochloric acid was added)
Wash the polymer solution using the
Was moved to. After allowing this catalyst mixed solution to stand, the aqueous phase
, And washed twice with distilled water.
Water separated. Next, the polymerization liquid phase separated from the oil-water is 3 times
With strong agitation to precipitate the polymer
After that, the solid part (copolymer) is sufficiently washed with acetone and filtered.
Collected by excess. 130 ° C, 350mm under nitrogen flow
Dried at Hg for 12 hours. The program obtained as described above
The yield of the propylene / butene copolymer was 75 g,
The intrinsic viscosity [η] measured in decalin at 5 ° C. is 2.7 dl.
/ G, the glass transition temperature Tg is -5.3 ° C,
The heat of fusion was 20 J / g and the butene content was 11 mol%.
And the molecular weight distribution (Mw / M
n) was 2.4. Young modulus is 145M
Pa.

[0222]

Example 1 70 parts by weight of the syndiotactic polypropylene obtained in Synthesis Example 1 above, 24 parts by weight of the atactic propylene / ethylene copolymer obtained in Synthesis Example 2, and the syndiotactic polypropylene obtained in Synthesis Example 4 To a total of 100 parts by weight of the tactic propylene / ethylene copolymer and 6 parts by weight, 0.02 parts by weight of a sorbitol-based crystal nucleating agent, Gelol MD (manufactured by Shin Nippon Chemical Co., Ltd.) is added, and the mixture is melt-kneaded to produce a syndiotactic. A polypropylene composition was obtained.

The composition had a tensile modulus of 124 MPa.
The Martens hardness was 11.9, the needle entry temperature was 124 ° C., and the haze was 9.5%. Table 2 shows the above results.

[0224]

Example 2 70 parts by weight of the syndiotactic polypropylene obtained in Synthesis Example 1 and the syndiotactic propylene-ethylene copolymer 2 obtained in Synthesis Example 4
4 parts by weight and 6 parts by weight of the isotactic propylene / ethylene copolymer obtained in Synthesis Example 3 for a total of 100 parts by weight, a sorbitol crystal nucleating agent Gelol MD
(Nippon Rikagaku Co., Ltd.) was added in an amount of 0.02 parts by weight and melt-kneaded to obtain a syndiotactic polypropylene-based composition.

The composition had a tensile modulus of elasticity of 155 MPa.
The Martens hardness was 10.1, the needle entry temperature was 123 ° C., and the haze was 13.1%. Table 2 shows the above results.

[0226]

Example 3 70 parts by weight of the syndiotactic polypropylene obtained in Synthesis Example 1 above, 24 parts by weight of the atactic propylene / ethylene copolymer obtained in Synthesis Example 2 and the isotactic propylene / ethylene copolymer obtained in Synthesis Example 3 To a total of 100 parts by weight of the total of 6 parts by weight of the tactic propylene / ethylene copolymer, 0.02 parts by weight of a sorbitol-based crystal nucleating agent, Gelol MD (manufactured by Shin Nippon Chemical Co., Ltd.) is added, and the mixture is melt-kneaded to produce a syndiotactic. A polypropylene composition was obtained.

The tensile modulus of the composition was 153 MPa.
The Martens hardness was 11.1, the needle entry temperature was 126 ° C., and the haze was 15.2%. Table 2 shows the above results.

[0228]

Example 4 70 parts by weight of the syndiotactic polypropylene obtained in Synthesis Example 1, 24 parts by weight of the atactic propylene / butene copolymer obtained in Synthesis Example 5, and the syndiotactic polypropylene obtained in Synthesis Example 6 To a total of 100 parts by weight of the tactic propylene / butene copolymer (6 parts by weight), 0.02 parts by weight of a sorbitol-based crystal nucleating agent, Gelol MD (manufactured by Shin Nippon Rikagaku Co., Ltd.) is added, and the mixture is melt-kneaded to produce syndiotactic polypropylene. A system composition was obtained.

The composition had a tensile modulus of elasticity of 145 MPa.
The Martens hardness was 13.5, the needle entry temperature was 127 ° C, and the haze was 9.7%. Table 2 shows the above results.

[0230]

Comparative Example 1 70 parts by weight of the syndiotactic polypropylene obtained in Synthesis Example 1 and the isotactic propylene / ethylene copolymer 30 obtained in Synthesis Example 3
To a total of 100 parts by weight of the total weight, 0.02 parts by weight of a sorbitol-based crystal nucleating agent Gelol MD (manufactured by Shin Nippon Rikagaku) was added and melt-kneaded to obtain a syndiotactic polypropylene-based composition.

The composition had a tensile modulus of elasticity of 245 MPa.
The Martens hardness was 9.1, the needle entry temperature was 123 ° C., and the haze was 31.1%. Table 2 shows the above results.

[0232]

Comparative Example 2 70 parts by weight of the syndiotactic polypropylene obtained in Synthesis Example 1 and the syndiotactic propylene / butene copolymer 30 obtained in Synthesis Example 6
To a total of 100 parts by weight of the total weight, 0.02 parts by weight of a sorbitol-based crystal nucleating agent Gelol MD (manufactured by Shin Nippon Rikagaku) was added and melt-kneaded to obtain a syndiotactic polypropylene-based composition.

This composition has a tensile modulus of elasticity of 340 MPa.
The Martens hardness was 13.5, the needle entry temperature was 127 ° C, and the haze was 14.7%. Table 2 shows the above results.

[0234]

[Table 2]

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuyoshi Kaneko 1-2-1, Waki, Waki-cho, Kuga-gun, Yamaguchi Prefecture F-term in Mitsui Chemicals, Inc. (reference) 4J002 BB05X BB12W BB14W BB14Y BB15W BB15X BB15Y ED086 EG026 EG076 EU026 EV306 EW046 FD206 4J028 AA01A AB00A AB01A AC01A AC10A AC28A AC49A BA00A BA01B BA02B BA03B BB00A BB01B BB02B BC12B BC15B BC16B BC17B BC19B BC25B BC26B EB02 EB03 EC04 EC01 EC02

Claims (6)

[Claims] (I) a structural unit (A) derived from a propylene component having a substantially syndiotactic structure;
If necessary, a structural unit (B) derived from ethylene and / or a structural unit (C) derived from an α-olefin having 4 to 20 carbon atoms, wherein the structural unit (A) is 90 to 100 mol% The structural unit (B) is contained in an amount of 0 to 10 mol%, and the structural unit (C) is contained in an amount of 0 to 9.5 mol%, and the intrinsic viscosity measured in decalin at 135 ° C. [Η] is 0.5 to 10 dl
/ G of a syndiotactic polypropylene in the range of at least one α-olefin selected from α-olefins having 2 to 20 carbon atoms in an amount of 50 to 100 mol%. And at least two α-olefin copolymers having a Young's modulus of 150 MPa or less, wherein the syndiotactic polypropylene (i) and the two or more α-olefin copolymers (ii) Weight ratio (total of (i) / (total of (ii))} is 90/10
A syndiotactic polypropylene-based composition, wherein the content of each of the two or more α-olefin-based copolymers is at least 1% by weight. 2. The method according to claim 1, wherein the crystal nucleating agent is contained in an amount of 0.01 to 1 part by weight based on 100 parts by weight of the syndiotactic polypropylene composition. Syndiotactic polypropylene-based composition. 3. The syndiotactic polypropylene (i) has a syndiotacticity in the range of 0.6 or more as viewed from the triad chain of propylene, and the α-olefin-based copolymer (ii) has a temperature of 135 ° C. Intrinsic viscosity [η] measured in decalin is 0.01 to 10
dl / g and the molecular weight distribution (Mw / g) determined by gel permeation chromatography (GPC).
Mn) is 4 or less, and the glass transition temperature (Tg) is −5.
The syndiotactic polypropylene-based composition according to claim 1, wherein the crystal nucleating agent (iii) is contained in an amount of 0.01 to 1 part by weight with respect to the syndiotactic polypropylene-based composition having a temperature of not more than 0C. Composition. 4. The α-olefin copolymer (ii)
Is 50 to 99 mol% of a structural unit derived from ethylene.
The amount of the structural unit derived from at least one kind of α-olefin selected from α-olefins having 3 to 20 carbon atoms is included in an amount of 1 to 50 mol%. Syndiotactic polypropylene-based composition. 5. The α-olefin copolymer (ii)
Contains a structural unit derived from propylene in an amount of 50 to 99 mol%, and a structural unit derived from at least one α-olefin selected from α-olefins having 2 to 20 carbon atoms excluding propylene, of 1 to The syndiotactic polypropylene-based composition according to claim 1, wherein the composition is contained in an amount of 50 mol%. 6. The α-olefin copolymer (ii)
The following component (a), the following component (b), the following component (c) and the following component (d)
The syndiotactic polypropylene composition according to claim 1, wherein the composition is obtained in the presence of at least one catalyst system consisting of at least one compound selected from the group consisting of: ): Transition metal complex represented by the following general formula (I) or (II) [In the formulas (I) and (II), M is Ti, Zr, Hf, R
n, Nd, Sm or Ru, and Cp ¹ and Cp ² are a cyclopentadienyl group, an indenyl group, a fluorenyl group or a derivative group thereof bonded to M by π,
X ¹ and X ² are an anionic ligand or a neutral Lewis base ligand, and Y is a nitrogen atom, an oxygen atom, a phosphorus atom,
Or a ligand containing a sulfur atom, wherein Z is C, O,
It is a B, S, Ge, Si or Sn atom or a group containing these atoms. (B): a compound that reacts with the transition metal M in the component (a) to form an ionic complex (c): an organoaluminum compound (d): an aluminoxane.