JP6952137B2 - Polypropylene composition - Google Patents

Description

The present invention covers polypropylene compositions, automotive articles containing polypropylene compositions, and the use of polypropylene compositions in automotive articles.

Polypropylene is the material of choice in many applications because it can be tailored to the particular purpose required. For example, out-of-phase polypropylene is widely used in the automobile industry (for example, bumper applications) because it combines good rigidity with moderate impact strength behavior. The heterophase polypropylene contains a polypropylene matrix in which the amorphous phase is dispersed. The amorphous phase contains a copolymer rubber. Further, the heterophase polypropylene may contain a certain amount of crystalline polyethylene. Today, the outer parts of automobiles are larger and require good fluidity during injection molding. Another advantage of high fluidity materials is the reduction of cycle time. In addition, there is an increasing demand for reduced fuel consumption, and therefore weight reduction is an urgent issue in the automotive industry. Weight reduction can be achieved by reducing the wall thickness or material density of the part. Higher rigidity is needed to reduce the wall thickness. On the other hand, the material needs to have high impact strength at room temperature and low temperature to withstand damage.

Therefore, an object of the present invention is to provide a low density material exhibiting good rigidity and impact strength, which is paired with good processability, especially in terms of high fluidity.

The present invention is directed to a polypropylene composition (C1), which is a polypropylene composition (C1).
(A) A heterophase propylene composition (HC).
(A1) A propylene homopolymer (HPP-1) having a _{melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 at least 100 g / 10 min and 30-90 g / 10 min. A matrix (M) comprising a propylene homopolymer (HPP-2) having _{a melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 in the range.
(A2) Elastomer propylene copolymer (PC-1), elastomer propylene copolymer (PC-2), and elastomer ethylene copolymer (EC) containing units derived _{from ethylene and units derived from C 4 to} C _{20 α-olefin.} With an heterophase propylene composition (HC),
(B) Includes a filler (F: filler).

The matrix (M) may further comprise a propylene homopolymer (HPP-3) having _{a melt flow rate of MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 of 25 g / 10 min or less.

The heterophase propylene composition (HC) is
(A) At least 50 wt% of the matrix (M), based on the weight of the heterophase propylene composition (HC).
And / or (b) Elastomer propylene copolymer (PC-1), elastomer propylene copolymer (PC-2), and elastomer ethylene copolymer (PC-1) in a total amount of 50 wt% or less based on the weight of the heterophase propylene composition (HC). It is recognized that it includes EC) and.

In addition, the heterophase propylene composition (HC)
(A) An amount of propylene homopolymer (HPP-1) in the range of 25-60 wt% based on the weight of the heterophase propylene composition (HC),
And / or (b) propylene homopolymers (HPP-2) in amounts ranging from 5 to 30 wt% based on the weight of the heterophase propylene composition (HC),
And / or (c) propylene homopolymers (HPP-3), in amounts ranging from 0 to 20 wt% based on the weight of the heterophase propylene composition (HC),
And / or (d) Elastomer propylene copolymer (PC-1) in an amount in the range of 2-15 wt% based on the weight of the heterophase propylene composition (HC),
And / or (e) Elastomer propylene copolymer (PC-2) in an amount in the range of 2-15 wt% based on the weight of the heterophase propylene composition (HC),
And / or (f) Elastomer ethylene copolymer (EC) in an amount in the range of 10-35 wt% based on the weight of the heterophase propylene composition (HC).
Is recognized to include.

Further, it is recognized that the filler (F) is contained in an amount of 30 wt% or less based on the weight of the polypropylene composition (C1).

Furthermore, the present invention is directed to a polypropylene composition (C2), which is a polypropylene composition (C2).
(A) Heterophase propylene copolymer (HECO-1)
(A1) A propylene homopolymer (HPP-1) having _{a melt flow rate of MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 of at least 100 g / 10 min.
(A2) A heterophase propylene copolymer (HECO-1) containing an elastomer propylene copolymer (PC-1) and
(B) Heterophase propylene copolymer (HECO-2)
(B1) A propylene homopolymer (HPP-2) having _{a melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 in the range of 30-90 g / 10 min.
(B2) A heterophase propylene copolymer (HECO-2) containing an elastomer propylene copolymer (PC-2) and
(C) Includes an elastomer copolymer (EC) containing units derived from ethylene and units derived from C _{4 to} C _{20 α-olefin.}

The polypropylene composition (C2) may further comprise a propylene homopolymer (HPP-3) having _{a melt flow rate of MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 of 25 g / 10 min or less.

Preferably, the polypropylene composition (C2) is
(A) A heterophase propylene copolymer (HECO-1) in an amount of at least 25 wt% based on the weight of the polypropylene composition (C2),
And / or (b) heterophase propylene copolymer (HECO-2) in an amount ranging from 8 to 35 wt% based on the weight of the polypropylene composition (C2),
And / or (c) Elastomer ethylene copolymer (EC) in an amount in the range of 8-30 wt% based on the weight of the polypropylene composition (C2),
And / or (d) an amount of filler (F) in the range of 1-30 wt% based on the weight of the polypropylene composition (C2),
And / or (e) contains an amount of propylene homopolymer (HPP-3) in the range of 0-20 wt% based on the weight of the polypropylene composition (C2).

Furthermore, the polypropylene composition (C2) was recognized, where (a) the xylene-soluble component fraction (XCS: xylene soluble fraction) of the heterophase propylene copolymer (HECO-1) had a comonomer content of the heterophase propylene copolymer (HECO-1). ) In the range of 30-60 mol% based on the weight of
And / or (b) The comonomer content of the xylene-soluble component fraction (XCS) of the heterophase propylene copolymer (HECO-2) is in the range of 30-60 mol% based on the weight of the heterophase propylene copolymer (HECO-2).

Further, the polypropylene composition (C2) was recognized, where (a) the comonomer content of the heterophase propylene copolymer (HECO-1) was in the range of 5-20 mol% based on the weight of the heterophase propylene copolymer (HECO-1). And
And / or (b) the comonomer content of the heterophase propylene copolymer (HECO-2) is in the range of 10-30 mol% based on the weight of the heterophase propylene copolymer (HECO-2).

In addition, the polypropylene composition (C2) was recognized, where (a) the intrinsic viscosity of the xylene-soluble component fraction (XCS) of the heterophase propylene copolymer (HECO-1) was measured according to ISO 1265-1 (135 ° C. in decalin). (IV: intrinsic viscosity) is in the range of 1.5 to 3.0 dl / g, and is in the range of 1.5 to 3.0 dl / g.
And / or (b) Intrinsic viscosity (IV) measured according to ISO 1265-1 (135 ° C. in decalin) of xylene-soluble component fraction (XCS) of heterophase propylene copolymer (HECO-2) is 1.5-3.2 dl. It is in the range of / g.

In addition, polypropylene compositions (C1) or polypropylene compositions (C2) are recognized, where the elastomeric ethylene copolymer (EC) is.
_{(A) Melt flow rate MFR 2} (190 ° C., 2.16 kg) measured according to ISO 1133 in the range 0.1-15 g / 10 min,
And / or (b) have a density in the range of ^{830-890 kg / cm 3.}

In addition, polypropylene compositions (C1) or polypropylene compositions (C2) with _{melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 in the range of 18-50 g / 10 min are recognized.

In the third aspect, the present invention is directed to an automotive article comprising a polypropylene composition (C1) and / or a polypropylene composition (C2).

In a fourth aspect, the present invention is directed to the use of polypropylene compositions (C1) and / or polypropylene compositions (C2) in automotive articles.

Hereinafter, the present invention will be described in more detail.

Polypropylene composition (C1)
In the first aspect, the present invention is directed to a polypropylene composition (C1), which is a polypropylene composition (C1).
(A) A heterophase propylene composition (HC).
(A1) At least 100 g / 10 min, preferably at least 120 g / 10 min, more preferably at least 140 g / 10 min, even more preferably at least 150 g / 10 min, for example in the range of 100 to 200 g / 10 min, preferably 140 to 180 g / 10 min. Range, more preferably 90 g / 10 min or less, preferably 90 g / 10 min or less, with propylene homopolymer (HPP-1) having _{a melt flow rate MFR 2} (230 ° C, 2.16 kg) measured according to ISO 1133 in the range 150-170 g / 10 min. Is 80 g / 10 min or less, more preferably 75 g / 10 min or less, even more preferably 70 g / 10 min or less, even more preferably 65 g / 10 min or less, for example, in the range of 30 to 90 g / 10 min, preferably 30 to 80 g / 10 min. _{Melt flow rate MFR 2} (230) measured according to ISO 1133 in the range, more preferably in the range of 35-75 g / 10 min, even more preferably in the range of 40-70 g / 10 min, even more preferably in the range of 45-65 g / 10 min. A matrix (M) containing a propylene homopolymer (HPP-2) having a temperature of 2.16 kg) and
(A2) Elastomer propylene copolymer (PC-1), elastomer propylene copolymer (PC-2), and elastomer ethylene copolymer (EC) containing units derived _{from ethylene and units derived from C 4 to} C _{20 α-olefin.} With an heterophase propylene composition (HC),
(B) Includes filler (F).

Further, the matrix (M) is preferably 25 g / 10 min or less, preferably 20 g / 10 min or less, more preferably 15 g / 10 min or less, even more preferably 10 g / 10 min or less, for example, in the range of 1 to 25 g / 10 min. _{Melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 in the range of ~ 20 g / 10 min, more preferably in the range of 3 ~ 15 g / 10 min, even more preferably in the range of 5-10 g / 10 min. It may further contain a propylene homopolymer (HPP-3) having.

Preferably, the matrix (M) consists of a propylene homopolymer (HPP-1) and a propylene homopolymer (HPP-2); or a propylene homopolymer (HPP-1) and a propylene homopolymer (HPP-2). And a propylene homopolymer (HPP-3).

The polypropylene composition (C1) necessarily contains a heterophasic propylene composition (HC). The heterophase propylene composition (HC) is in an amount of at least 50 wt%, preferably at least 60 wt%, more preferably 80 wt% or less, eg, 50-99 wt%, based on the weight of the polypropylene composition (C1). It is recognized that the content is preferably in the range of 60 to 95 wt%, more preferably in the range of 70 to 95 wt%, and even more preferably in the range of 85 to 95 wt%.

The polypropylene composition (C1) necessarily contains a filler (F). The filler (F) is preferably in an amount of 30 wt% or less, preferably 20 wt% or less, more preferably 14 wt% or less, for example, in the range of 1 to 30 wt%, based on the weight of the polypropylene composition (C1). Is recognized to be included in the range of 5 to 20 wt%, more preferably in the range of 10 to 14 wt%.

Only the heterophase propylene composition (C3) and optionally the polymer carrier material (PCM) may be the polymer component within the polypropylene composition (C1), i.e. in the absence of other polymer components. good.

The polypropylene composition (C1) may be composed of a heterophase propylene composition (C3), a filler (F), and optionally an additive (AD).

It is the finding of the present invention that the density of the polypropylene composition (C1) can be reduced without negatively affecting mechanical properties such as rigidity and impact resistance.

Polypropylene composition (C1) is, 995kg / cm ³ or less, preferably 990kg / cm ³ or less, more preferably 985kg / cm ³ or less, such as the range of 975~995kg / cm ^3, preferably 975~990kg / cm ³ It is recognized that it has a density measured according to ISO 1183-187 in the range of, more preferably in the range of 975-985 kg / cm ^3.

Further, the polypropylene composition (C1) is bent at least 1400 MPa, preferably at least 1500 MPa, more preferably at least 1600 MPa, for example in the range of 1400 to 1800 MPa, preferably in the range of 1500 to 1700 MPa, more preferably in the range of 1600 to 1700 MPa. It is recognized that it has a coefficient.

Further, the polypropylene composition (C1) is preferably in the range of 18-50 g / 10 min, such as at least 15 g / 10 min, preferably at least 18 g / 10 min, more preferably at least 20 g / 10 min, for example in the range of 15-100 g / 10 min. _{Even more preferably, it is recognized to have a melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 in the range of 20-40 g / 10 min.

All components used in the preparation of this composition, ie the propylene composition (C1), are known. Therefore, the preparation of their components is also well known.

The polypropylene composition (C1) can be prepared by adding heterophase propylene (HECO), a filler (F), and optionally an additive (AD) to an extruder and extruding them.

Different Phase Propylene Composition (HC)
The expression "heterogeneous" indicates that at least one elastomer copolymer is (finely) dispersed in the matrix. In other words, at least one elastomer copolymer forms inclusions in the matrix. That is, the matrix contains (finely) dispersed inclusions that are not part of the matrix, said inclusions containing at least one elastomer copolymer. The term "inclusion" preferably indicates that the matrix and inclusion form different phases within the heterophase propylene copolymer, said inclusion being viewed by a high resolution microscope such as an electron microscope or scanning force microscope. Can be done.

The matrix (M) of the heterophase propylene composition (HC) comprises a propylene homopolymer (HPP-1), a propylene homopolymer (HPP-2) and optionally a propylene homopolymer (HPP-3), presumably. A complex structure is formed in the final composition. In other words, the propylene homopolymer (HPP-1), the propylene homopolymer (HPP-2), and optionally the propylene homopolymer (HPP-3) form a continuous phase, while the elastomeric propylene copolymer (HPP-3). The PC-1), the elastomeric propylene copolymer (PC-2), and the elastomeric ethylene copolymer (EC) form inclusions dispersed in this continuous phase.

Preferably, the heterophase propylene composition (HC) contains the matrix (M) in an amount of at least 50 wt%, preferably at least 55 wt%, more preferably at least 60 wt%, based on the weight of the heterophase propylene composition (HC). The amount is preferably in the range of 55-75 wt%, more preferably in the range of 60-70 wt%, such as in the range of 50-80 wt%.

The matrix (M) of the heterophase propylene composition (HC) contains propylene homopolymer (HPP-1) in an amount of at least 25 wt%, preferably at least 30 wt%, based on the weight of the heterophase propylene composition (HC). The amount is preferably at least 35 wt%, even more preferably at least 40 wt%, for example in the range of 25-60 wt%, preferably in the range of 30-55 wt%, more preferably in the range of 35-50 wt%, even more preferably. It is recognized that it is contained in the range of 40 to 45 wt%.

Further, the matrix (M) of the heterophase propylene composition (HC) contains propylene homopolymer (HPP-2) in an amount of 30 wt% or less, preferably 25 wt% or less, based on the weight of the heterophase propylene composition (HC). , More preferably 20 wt% or less, for example in the range of 5-30 wt%, preferably in the range of 6-25 wt%, more preferably in the range of 10-20 wt%.

Propylene homopolymer (HPP-3) is not an essential compound of polypropylene composition (C). However, when the propylene homopolymer (HPP-3) is included in the matrix (M) of the heterophase propylene composition (HC), the propylene homopolymer (HPP-3) is 20 wt based on the weight of the heterophase propylene composition (HC). It is recognized that the amount is preferably in the range of 5 to 20 wt%, more preferably in the range of 10 to 15 wt%, such as an amount of% or less, preferably 15 wt% or less, for example, a range of 0 to 20 wt%.

Preferably, the heterophase propylene composition (HC) is based on the weight of the elastomeric propylene copolymer (PC-1), the elastomeric propylene copolymer (PC-2) and the elastomeric ethylene copolymer (EC) based on the weight of the heterophase propylene composition (HC). A total amount of 50 wt% or less, preferably 45 wt% or less, more preferably 40 wt% or less, for example, 20 to 50 wt%, preferably 25 to 45 wt%, more preferably 30 to 40 wt%. Included in the range of%.

The heterophase propylene composition (HC) contains the elastomeric propylene copolymer (PC-1) in an amount of at least 1 wt%, preferably at least 2 wt%, more preferably at least 3 wt%, based on the weight of the heterophase propylene composition (HC). Amount of, even more preferably at least 5 wt%, preferably in the range of 1-20 wt%, preferably in the range of 2-15 wt%, more preferably in the range of 5-15 wt%, even more preferably in the range of 5-10 wt%. It is recognized that it is included in the range.

Further, the heterophase propylene composition (HC) contains the elastomer propylene copolymer (PC-2) in an amount of 20 wt% or less, preferably 15 wt% or less, more preferably 10 wt% based on the weight of the heterophase propylene composition (HC). It is recognized that the amount is less than or equal to%, preferably in the range of 2 to 15 wt%, more preferably in the range of 5 to 10 wt%, such as in the range of 1 to 20 wt%.

Further, the heterophase propylene composition (HC) contains the elastomer ethylene copolymer (EC) in an amount of 35 wt% or less, preferably 30 wt% or less, more preferably 25 wt% or less, based on the weight of the heterophase propylene composition (HC). It is recognized that the amount is preferably in the range of 15-30 wt%, more preferably in the range of 18-25 wt%, such as in the range of 10-35 wt%.

The heterophase propylene composition (HC) necessarily contains both propylene homopolymers (HPP-1) and propylene homopolymers (HPP-2). Both the propylene homopolymer (HPP-1) and the propylene homopolymer (HPP-2) satisfy the inequality (Ia), preferably the inequality (Ib), more preferably the inequality (Ic), and even more preferably the inequality (Id). Is recognized.
Co (HPP-1) / Co (HPP-2) ≧ 0.8 (Ia)
40 ≧ Co (HPP-1) / Co (HPP-2) ≧ 0.8 (Ib)
20 ≧ Co (HPP-1) / Co (HPP-2) ≧ 1.5 (Ic)
10 ≧ Co (HPP-1) / Co (HPP-2) ≧ 2.0 (Id)
Here, Co (HPP-1) is the amount of propylene homopolymer (HPP-1) in wt% based on the weight of the heterophase propylene composition (HC), and Co (HPP-2) is the heterophase propylene composition (HC). ) Is the amount of propylene homopolymer (HPP-2) in wt%.

As shown above, the propylene homopolymer (HPP-3) is any component of the heterophase propylene composition (HC). When the propylene homopolymer (HPP-3) is present in the heterophase propylene composition (HC), both the propylene homopolymer (HPP-1) and the propylene homopolymer (HPP-3) are inequalities (IIa), preferably inequalities. It is recognized that (IIb), more preferably the inequality (IIc), even more preferably the inequality (IId) is satisfied.
Co (HPP-1) / Co (HPP-3) ≧ 0.8 (IIa)
40 ≧ Co (HPP-1) / Co (HPP-3) ≧ 0.8 (IIb)
20 ≧ Co (HPP-1) / Co (HPP-3) ≧ 1.5 (IIc)
10 ≧ Co (HPP-1) / Co (HPP-3) ≧ 2.0 (IId)
Here, Co (HPP-1) is the amount of propylene homopolymer (HPP-1) in wt% based on the weight of the heterophase propylene composition (HC), and Co (HPP-3) is the heterophase propylene composition (HC). ) Is the amount of propylene homopolymer (HPP-3) in wt%.

Preferably, the homopolymer (HPP-1) and the propylene homopolymer (HPP-2) of the heterophase propylene composition (HC) are both inequality (IIIa), preferably inequality (IIIb), more preferably inequality (IIIc), Even more preferably, the inequality (IIId) is satisfied.
MFR (HPP-1) -MFR (HPP-2) ≧ 50 (IIIa)
170 ≧ MFR (HPP-1) -MFR (HPP-2) ≧ 50 (IIIb)
150 ≧ MFR (HPP-1) -MFR (HPP-2) ≧ 70 (IIIc)
125 ≧ MFR (HPP-1) -MFR (HPP-2) ≧ 90 (IIId)
Here, the MFR (HPP-1) is the melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 of the propylene homopolymer (HPP-1), and the MFR (HPP-2) is the propylene homopolymer. _{Melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 (HPP-2).

Preferably, the homopolymer (HPP-1) and the propylene homopolymer (HPP-3) of the heterophase propylene composition (HC) are both inequality (IVa), preferably inequality (IVb), more preferably inequality (IVc), Even more preferably, the inequality (IVd) is satisfied.
MFR (HPP-1) -MFR (HPP-3) ≧ 75 (IVa)
190 ≧ MFR (HPP-1) -MFR (HPP-3) ≧ 75 (IVb)
170 ≧ MFR (HPP-1) -MFR (HPP-3) ≧ 100 (IVc)
165 ≧ MFR (HPP-1) -MFR (HPP-3) ≧ 140 (IVd)
Here, MFR (HPP-1) is a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 of propylene homopolymer (HPP-1), and MFR (HPP-3) is a propylene homopolymer. _{Melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 of (HPP-3).

The matrix (M) of the heterophase propylene composition (HC) is multimodal in view of its molecular weight, and is bimodal or propylene homopolymer, especially in the absence of propylene homopolymer (HPP-3). When HPP-3) is included, it is recognized as trimodal. The expressions "multimodal", "bimodal" or "trimodal" used throughout the present invention indicate the mode of the polymer, that is, the shape of its molecular weight distribution curve, which is a function of molecular weight. It is a graph of the molecular weight fraction.

It is recognized that the heterophase propylene composition (HC) is nucleated, especially α-nucleated.

Therefore, it is recognized that the heterophase propylene composition (HC) contains an α-nucleating agent. Preferably, the heterophase propylene composition (HC) does not contain a β nucleating agent.

The α-nucleating agent is preferably selected from the group consisting of the following.
(I) Salts of monocarboxylic and polycarboxylic acids, such as sodium benzoate or aluminum tert-butylbenzoate, and (ii) dibenzylene sorbitol (eg, 1,3: 2,4 dibenzylene sorbitol) and C _1- . C ₈ -alkyl substituted dibenzylidene sorbitol derivatives such as methyldibenzidene sorbitol, ethyldibendidene sorbitol, or dimethyldibendidene sorbitol (eg, 1,3: 2,4 di (methylbenzidene) sorbitol), or substituted nonitol derivatives, For example 1,2,3,-trideoxy-4,6: 5,7-bis-O-[(4-propylphenyl) methylene] -nonitol and the like, as well as salts of diesters of (iii) phosphoric acid, such as sodium 2, 2'-Methylbis (4,6,-di-tert-butylphenyl) phosphate, or aluminum-hydroxy-bis [2,2'-methylene-bis (4,6-di-t-butylphenyl) phosphate], etc. And (iv) vinyl cycloalkane polymers or vinyl alkane polymers, and (v) mixtures thereof.

Preferably, the α-nucleating agent contained in the heterophase propylene composition (HC) is a vinylcycloalkane polymer and / or a vinylalkane polymer, more preferably a vinylcycloalkane polymer such as vinylcyclohexane (VCH) polymer. Vinyl cyclohexane (VCH) polymers are particularly preferred as α-nucleating agents. The amount of vinylcycloalkane polymer and / or vinylalkane polymer, more preferably vinylcyclohexane (VCH) polymer in the heterophase propylene composition (HC), such as vinylcyclohexane (VCH), is 500 ppm or less, preferably 200 ppm or less. , More preferably 100 ppm or less, for example in the range of 0.1 to 500 ppm, preferably in the range of 0.5 to 200 ppm, more preferably in the range of 1 to 100 ppm. Furthermore, it is recognized that vinyl cycloalkane polymers and / or vinyl alkane polymers are introduced into the heterophase propylene composition (HC) by BNT technology. For BNT technology, reference is made to International Publication No. 99/24478, International Publication No. 99/24479, and in particular International Publication No. 00/68315. According to this technique, the catalyst system, preferably the Ziegler-Nattapro catalyst, can be modified by polymerizing the vinyl compound in the presence of a catalytic system, particularly including a special Ziegler-Nattapro catalyst, an external donor and a co-catalyst. , This vinyl compound has the following formula.
CH ₂ = CH-CHR ³ R ⁴
Here, R ³ and R ⁴ both form a 5- or 6-membered saturated, unsaturated or aromatic ring, or independently represent an alkyl group containing 1 to 4 carbon atoms, and the heterophase propylene composition (HC). Alternatively, a modification catalyst is used for the preparation of at least one of its components. The polymerized vinyl compound acts as an α-nucleating agent. The weight ratio of the vinyl compound to the solid catalyst component in the catalyst modification step is preferably up to 5 (5: 1), more preferably up to 3 (3: 1), for example 0.5 (1: 2) to 2 (2). 1) range, etc.

Such nucleating agents are commercially available and are described, for example, in Hans Zweifel's "Plastic Adaptives Handbook", 5th Edition, 2001 (pages 967-990).

The heterophase propylene composition (HC) comprises different components, namely a propylene homopolymer (HPP-1), a propylene homopolymer (HPP-2), optionally a propylene homopolymer (HPP-3), and an elastomeric propylene copolymer (PC). It can be produced by mixing -1), an elastomer propylene copolymer (PC-2), and an elastomer ethylene copolymer (EC). Alternatively, the heterophase propylene composition (HC) can be produced in a sequential step process with multiple reactors operating under different reaction conditions in a continuous configuration. Alternatively, the heterophase propylene composition (HC) includes a heterophase propylene copolymer (HECO-1), a heterophase propylene copolymer (HECO-2), an elastomer ethylene copolymer (EC), and optionally a propylene homopolymer (HPP-). It can also be obtained by mixing with 3). For definitions of the heterophase propylene copolymer (HECO-1) and the heterophase propylene copolymer (HECO-2), refer to the propylene composition (C2). In other words, propylene homopolymers (HPP-1) and elastomeric propylene copolymers (PC-1) can be introduced into the heterophase propylene composition (HC) in the form of heterophase propylene copolymers (HECO-1), while propylene homopolymers (HPP-1). -2) and the elastomeric propylene copolymer (PC-2) can be introduced into the heterophase propylene composition (HC) in the form of a heterophase propylene copolymer (HECO-2).

Propylene homopolymer (HPP-1)
Propylene homopolymer (HPP-1) is a propylene homopolymer and provides sufficient rigidity and strength.

The expression "propylene homopolymer" relates to polypropylene consisting substantially, i.e., more than 99.7 mol%, and even more preferably at least 99.8 mol% of propylene units. In a preferred embodiment, only propylene units can be detected in propylene homopolymers.

It is recognized that propylene homopolymer (HPP-1) has a relatively high melt flow rate. The propylene homopolymer (HPP-1) is preferably at least 100 g / 10 min, preferably at least 120 g / 10 min, more preferably at least 140 g / 10 min, even more preferably at least 150 g / 10 min, such as in the range 100-200 g / 10 min. _{It is recognized that it has a melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 in the range 140-180 g / 10 min, and even more preferably 150-170 g / 10 min.

Further, the propylene homopolymer (HPP-1) is preferably less than 5.0 wt%, preferably less than 3.0 wt%, even more preferably less than 2.5 wt%, for example in the range of 0.5 to 5.0, preferably 1. It is recognized that it has a low temperature xylene soluble component content (XCS) in the range of 0 to 3.0 wt%, even more preferably 1.0 to 2.5 wt%.

Elastomer propylene copolymer (PC-1)
Elastomeric propylene copolymer (PC-1) is, (i) propylene and (ii) ethylene and / or at least _{C 20} alpha-olefin from another _{C 4,} for example a unit which may be derived from _{C 4} such as _{C 10} alpha-olefins, More preferably, (i) propylene and (ii) ethylene and / or at least another α-olefin selected from the group consisting of 1-butene, 1-pentene, 1-hexene, 1-heptene, and 1-octene. Includes and preferably consists of units of origin. Elastomeric propylene copolymer (PC-1) may further for example may contain units derived from conjugated dienes or non-conjugated dienes such as butadiene, but the elastomeric copolymer (i) propylene and (ii) ethylene and / or C ₄ It is preferable that it consists only of units that can be derived from C _{20 α-olefin.} Suitable non-conjugated diene, if used, are straight-chain and branched acyclic diene, such as 1,4-hexadiene, 1,5-hexadiene, 1,6-octadiene, 5-methyl-1,4-hexadiene. , 3,7-Dimethyl-1,6-octadiene, 3,7-dimethyl-1,7-octadiene, and mixed isomers of dihydromilsen and dihydroosimene, and single ring alicyclic diene, such as 1,4. -Cyclohexadiene, 1,5-cyclooctadiene, 1,5-cyclododecadiene, 4-vinylcyclohexene, 1-allyl-4-isopropyridenecyclohexane, 3-allylcyclopentene, 4-cyclohexene, and 1-isopropenyl- Includes 4- (4-butenyl) cyclohexane and the like. Polycyclic alicyclic fusion and cross-linked diene are also suitable, such as tetrahydroindene, methyltetrahydroindene, dicyclopentadiene, bicyclo (2,2,1) hepta-2,5-diene, 2-methylbicycloheptadiene. , And alkenyl, alkylidene, cycloalkenyl, and cycloalkylidene norbornene, such as 5-methylene-2-norbornene, 5-isopropyridene norbornene, 5- (4-cyclopentenyl) -2-norbornene, and 5-cyclohexylidene-2. -Including Norbornene and so on. Preferred non-conjugated diene are 5-ethylidene-2-norbornene, 1,4-hexadiene, and dicyclopentadiene.

Thus, the elastomeric propylene copolymer (PC-1) comprises at least a unit capable of being derived from propylene and a unit capable of being derived from ethylene and / or an additional α-olefin as defined in the preceding paragraph. However, the elastomeric propylene copolymer (PC-1) is defined in a unit that can be derived solely from propylene, a unit that can be derived from ethylene, and optionally a conjugated diene such as butadiene or a preceding paragraph such as 1,4-hexadiene. It is particularly preferable to include a unit that can be derived from the unconjugated diene obtained. Therefore, ethylene propylene non-conjugated diene monomer polymer and / or ethylene propylene polymer (EPR: ethylene polypropylene polymer) is preferable as the elastomer propylene copolymer (PC-1), and the latter is most preferable.

The elastomeric propylene copolymer (PC-1) contains at least 30 mol of comonomer units, i.e., units contained in addition to propylene-derived units, preferably ethylene-derived units, based on the weight of the elastomeric propylene copolymer (PC-1). It is recognized that the content is preferably in the range of 40-70 mol%, more preferably in the range of 45-60 mol%, such as in the amount of%, preferably at least 40 mol%, for example in the range of 30-80 mol%.

Propylene homopolymer (HPP-2)
Propylene homopolymer (HPP-2) is a propylene homopolymer, which also contributes to sufficient rigidity and strength.

Propylene homopolymer (HPP-2) is 90 g / 10 min or less, preferably 80 g / 10 min or less, more preferably 75 g / 10 min or less, even more preferably 70 g / 10 min or less, even more preferably 65 g / 10 min or less, for example 30 to. It is preferably in the range of 30-80 g / 10 min, more preferably in the range of 35-75 g / 10 min, even more preferably in the range of 40-70 g / 10 min, and even more preferably in the range of 45-65 g / 10 min, such as in the range of 90 g / 10 min. _{It is recognized that it has a melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to the ISO 1133 range.

In other words, it is recognized that the propylene homopolymer (HPP-2) has a lower melt flow rate than the propylene homopolymer (HPP-1).

Further, the propylene homopolymer (HPP-2) is preferably less than 5.0 wt%, preferably less than 3.5 wt%, even more preferably less than 3.0 wt%, for example in the range of 0.5 to 5.0, preferably 1. It is recognized that it has a low temperature xylene soluble component content (XCS) in the range of 0 to 3.5 wt%, even more preferably 1.0 to 2.5 wt%.

Elastomer propylene copolymer (PC-2)
Elastomeric propylene copolymer (PC-2) is, (i) propylene and (ii) ethylene and / or at least _{C 20} alpha-olefin from another _{C 4,} for example a unit which may be derived from _{C 4} such as _{C 10} alpha-olefins, More preferably, (i) propylene and (ii) ethylene and / or at least another α-olefin selected from the group consisting of 1-butene, 1-pentene, 1-hexene, 1-heptene, and 1-octene. Includes and preferably consists of units of origin. Elastomeric propylene copolymer (PC-2) is further for example may contain units derived from conjugated dienes or non-conjugated dienes such as butadiene, but the elastomeric copolymer (i) propylene and (ii) ethylene and / or C ₄ It is preferable that it consists only of units that can be derived from C _{20 α-olefin.} Suitable non-conjugated diene, if used, are straight-chain and branched acyclic diene, such as 1,4-hexadiene, 1,5-hexadiene, 1,6-octadiene, 5-methyl-1,4-hexadiene. , 3,7-Dimethyl-1,6-octadiene, 3,7-dimethyl-1,7-octadiene, and mixed isomers of dihydromilsen and dihydroosimene, and single ring alicyclic diene, such as 1,4. -Cyclohexadiene, 1,5-cyclooctadiene, 1,5-cyclododecadiene, 4-vinylcyclohexene, 1-allyl-4-isopropyridenecyclohexane, 3-allylcyclopentene, 4-cyclohexene, and 1-isopropenyl- Includes 4- (4-butenyl) cyclohexane and the like. Polycyclic alicyclic fusion and cross-linked diene are also suitable, such as tetrahydroindene, methyltetrahydroindene, dicyclopentadiene, bicyclo (2,2,1) hepta-2,5-diene, 2-methylbicycloheptadiene. , And alkenyl, alkylidene, cycloalkenyl, and cycloalkylidene norbornene, such as 5-methylene-2-norbornene, 5-isopropyridene norbornene, 5- (4-cyclopentenyl) -2-norbornene, and 5-cyclohexylidene-2. -Including Norbornene and so on. Preferred non-conjugated diene are 5-ethylidene-2-norbornene, 1,4-hexadiene, and dicyclopentadiene.

Thus, the elastomeric propylene copolymer (PC-2) comprises at least a unit capable of being derived from propylene and a unit capable of being derived from ethylene and / or an additional α-olefin as defined in the preceding paragraph. However, the elastomeric propylene copolymer (PC-2) is defined in a unit that can be derived solely from propylene, a unit that can be derived from ethylene, and optionally a conjugated diene such as butadiene or a preceding paragraph such as 1,4-hexadiene. It is particularly preferable to include a unit that can be derived from the unconjugated diene obtained. Therefore, ethylene propylene non-conjugated diene monomer polymer and / or ethylene propylene polymer (EPR) is preferable as the elastomer propylene copolymer (PC-2), and the latter is most preferable.

The elastomeric propylene copolymer (PC-2) contains comonomer units, i.e., units contained in addition to propylene-derived units, preferably ethylene-derived units, at least 30 mol% based on the weight of the elastomeric propylene copolymer (PC-2). It is recognized that the amount is preferably in the range of 40 to 70 mol%, more preferably in the range of 45 to 60 mol%, such as in the amount of at least 40 mol%, for example in the range of 30 to 80 mol%.

It is recognized that the elastomeric propylene copolymer (PC-1) and the elastomeric propylene copolymer (PC-2) are different from each other. However, the elastomeric propylene copolymer (PC-1) and the elastomeric propylene copolymer (PC-2) may be identical to each other.

Propylene homopolymer (HPP-3)
Propylene homopolymers (HPP-3) are propylene homopolymers (HPP-1) and propylene to counteract the potential for reduced rigidity and strength caused by lower levels of filler in the composition (C1). It can be applied in addition to homopolymers (HPP-2).

The propylene homopolymer (HPP-3) is preferably 25 g / 10 min or less, preferably 20 g / 10 min or less, more preferably 15 g / 10 min or less, still more preferably 10 g / 10 min or less, for example, in the range of 1 to 25 g / 10 min. _{Melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 in the range of 1-20 g / 10 min, more preferably in the range of 3-15 g / 10 min, even more preferably in the range of 5-10 g / 10 min. ) Is recognized.

Further, the propylene homopolymer (HPP-3) is preferably in the range of 1900 to 2300 MPa, more preferably in the range of 2000 to 2200 MPa, such as at least 1800 MPa, preferably at least 1900 MPa, more preferably at least 2000 MPa, for example in the range of 1800 to 2500 MPa. It is recognized that it has a bending coefficient of.

The propylene homopolymer (HPP-3) may have a lower melt flow rate than the propylene homopolymer (HPP-1) and a lower melt flow rate than the propylene homopolymer (HPP-2).

Further, the propylene homopolymer (HPP-3) is preferably less than 5.0 wt%, preferably less than 3.5 wt%, even more preferably less than 3.0 wt%, for example in the range of 0.5 to 5.0 wt%. Is recognized to have a low temperature xylene soluble component content (XCS) in the range of 1.0 to 3.5 wt%, even more preferably 1.0 to 2.5 wt%.

Elastomer ethylene copolymer (EC)
Elastomer ethylene copolymer (EC) is (chemically) different from elastomer propylene copolymer (PC-1) and elastomer propylene copolymer (PC-2).

The elastomeric ethylene copolymer (EC) is derived from a unit that can be derived from ethylene and at least another unit that can be derived from C _{4 to C 20} α-olefin, such as C ₄ to C ₁₀ α-olefin, more preferably ethylene. The unit to be obtained and at least another, selected from the group consisting of 1-butene, 1-pentene, 1-hexene, 1-heptene, and 1-octene, with 1-butene and / or 1-octene being a particularly preferred α-olefin. Includes and preferably consists of units of origin.

Elastomer ethylene copolymers (ECs) thus include at least units that can be derived from ethylene and units that can be derived from the additional α-olefins defined in the preceding paragraph. However, the elastomeric ethylene copolymer (EC) is a unit that can be derived from ethylene alone and additional α-olefins such as 1-butene, 1-pentene, 1-hexene, 1-heptene, and 1-octene. It is particularly preferable to include and. Elastomer ethylene copolymers (ECs) are particularly preferably containing only units that can be derived from ethylene and units selected from 1-butene, 1-hexene, and 1-octene. Elastomer ethylene copolymers (ECs) contain units that can be derived solely from ethylene and units that can be derived from 1-octene, or units that can be derived from ethylene and units that can be derived from 1-butene only. Recognized to include.

As shown above, the matrix (M) of the heterophase propylene composition (HC) is (finely) composed of an elastomer propylene copolymer (PC-1), an elastomer propylene copolymer (PC-2), and an elastomer ethylene copolymer (EC). Includes dispersed inclusions. The elastomeric ethylene copolymer (EC) may form inclusions (finely dispersed) in the elastomeric propylene copolymer (PC-1) and the elastomeric propylene copolymer (PC-2).

Elastomer ethylene copolymer (EC) is 15 g / 10 min or less, preferably 10 g / 10 min or less, more preferably 8.0 g / 10 min or less, even more preferably 6.0 g / 10 min or less, for example 0.1 to 15 g / 10 min. Measured according to ISO 1133, such as a range, preferably in the range of 0.5-10 g / 10 min, more preferably in the range of 1.0 to 8.0 g / 10 min, even more preferably in the range of 1.0 to 6.0 g / 10 min. It is recognized that it has a melt flow rate of MFR ₂ (190 ° C., 2.16 kg).

Elastomeric ethylene copolymer (EC) is, 890 kg / cm ³ or less, preferably 0.880kg / cm ³ or less, more preferably 0.875kg / cm ³ or less, such as the range of 830~890kg / cm ^3, preferably 840～ range of 0.880kg / cm ^3, it is recognized that more preferably from 850~875kg / cm ^3, even more preferably having a density measured according ISO 1183-187 in the range of 860~875kg / cm ³ ..

The ethylene content of the elastomeric ethylene copolymer (EC) may be at least 70 mol%, preferably at least 80 mol%, preferably in the range of 80-95 mol%, more preferably 82-92 mol%, such as in the range of 70-98 mol%. Be recognized.

Filler (F)
As a further requirement, the polypropylene composition (C1) requires the presence of a filler (F). Therefore, the filler (F) is not considered to be included in the additive (AD) as defined in more detail below.

Preferably, the filler (F) is a mineral filler. It is recognized that the filler (F) is a phyllosilicate, mica, or ash stone. Even more preferably, the filler (F) is selected from the group consisting of mica, siliceous stone, kaolinite, smectite, montmorillonite, and talc. Most preferably, the filler (F) is talc.

The filler (F) has a median particle size in the range of 0.8 to 20 μm (D ₅₀ ) and a top cut particle size in the range of 1.0 to _{40 μm (D 95} ), preferably the center in the range of 1.0 to 10 μm. Particle size (D ₅₀ ) and top cut particle size in the range 2.0-30 μm (D ₉₅ ), more preferably median particle size in the range 1.2-5.0 μm (D ₅₀ ) and 3.0-10 μm It is recognized that it has a top-cut particle size (D _95).

Typically, the filler (F) is less than ^{20 m} 2 / g, more preferably less than ^{15 m} 2 / g, for example, a range of 1-20 m ² / g, preferably in the range of 5 to 15 m ² / g, analysis adsorbate It has a surface area measured according to a commonly known BET method with N _{2 gas as.}

The filler (F) that meets these requirements is preferably an anisotropic mineral filler (F) such as talc, mica, and silica stone. Particularly preferred is talc.

Filler (F) is a level of technology and is a commercially available product.

Additive (AD)
In addition to the heterophase propylene composition (HC) and filler (F), the polypropylene composition (C1) may contain an additive (AD). Typical additives are acid scavengers, antioxidants, colorants, light stabilizers, plasticizers, slip agents, scratch inhibitors, dispersants, processing aids, lubricants, pigments, and antistatic agents. .. As shown above, the filler (F) is not considered an additive.

Such additives are commercially available and are described, for example, in Hans Zweifel's "Plastic Adaptives Handbook", 6th Edition, 2009 (pages 1141-1190).

Further, the term "additive (AD)" according to the present invention also includes carrier materials, in particular polymeric carrier materials (PCM), in particular polypropylene carrier materials.

Preferably, the polypropylene composition (C1) is 0.1 to 20 wt%, preferably 0.5 to 15 wt%, more preferably 0.5 to 10 wt%, even more, based on the weight of the polypropylene composition (C1). It preferably contains 0.5-5.0 wt% additive (AD).

In a preferred embodiment, the polypropylene composition (C1) comprises an antioxidant, an acid scavenger, a scratch inhibitor, a mold release agent, a lubricant, and a UV stabilizer.

Polymer Carrier Material (PCM)
Preferably, the polypropylene composition (C1) is a polymer (s) contained in the above-mentioned polymer polypropylene composition (C1), that is, a propylene homopolymer (HPP-1), a propylene homopolymer (HPP-2), an elastomer. Polypropylene compositions of propylene copolymers (PC-1), elastomeric propylene copolymers (PC-2), elastomeric ethylene copolymers (EC), and optionally additional polymers (s) different from propylene homopolymers (HPP-3). It does not contain more than 10 wt%, preferably more than 5 wt%, more preferably more than 3 wt% based on the weight of the product (C1). When additional polymers are present, these polymers are typically polymer carrier materials (PCM) for additives.

The polypropylene composition (C1) contains the polymer carrier material (PCM) in an amount of 10 wt% or less, preferably 5.0 wt% or less, more preferably 3.0 wt% or less, based on the weight of the polypropylene composition (C1). It is recognized that the amount is preferably in the range of 0.3 to 5.0 wt%, more preferably in the range of 0.5 to 3.0 wt%, such as in the range of 0 to 10.0 wt%.

The polymer carrier material (PCM) is a carrier polymer to ensure uniform distribution in the polypropylene composition (C1) with respect to other additives. The polymer carrier material (PCM) is not limited to a particular polymer. Polymeric carrier material (PCM) is an ethylene homopolymer, ethylene and e.g. ethylene copolymers from C ₃ obtained from alpha-olefin comonomers such as C ₈ alpha-olefin comonomer, propylene homopolymer, and / or propylene with e.g. ethylene and / Alternatively, it may be a propylene copolymer obtained from an α-olefin comonomer such as _{C 4} to C _{8 α-olefin comonomer.}

Polypropylene composition (C2)
In the second aspect, the present invention is directed to a polypropylene composition (C2), which polypropylene composition (C2) is.
(A) Heterophase propylene copolymer (HECO-1)
(A1) At least 100 g / 10 min, preferably at least 120 g / 10 min, more preferably at least 140 g / 10 min, even more preferably at least 150 g / 10 min, for example in the range of 100 to 200 g / 10 min, preferably 140 to 180 g / 10 min. With a propylene homopolymer (HPP-1) having _{a melt flow rate of MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 in the range, and even more preferably in the range of 150-170 g / 10 min.
(A2) A heterophase propylene copolymer (HECO-1) containing an elastomer propylene copolymer (PC-1) and
(B) Heterophase propylene copolymer (HECO-2)
(B1) 90 g / 10 min or less, preferably 80 g / 10 min or less, more preferably 75 g / 10 min or less, even more preferably 70 g / 10 min or less, even more preferably 65 g / 10 min or less, for example, in the range of 30 to 90 g / 10 min. Measured according to ISO 1133, preferably in the range of 30-80 g / 10 min, more preferably in the range of 35-75 g / 10 min, even more preferably in the range of 40-70 g / 10 min, and even more preferably in the range of 45-65 g / 10 min. Propylene homopolymer (HPP-2) having a melt flow rate MFR ₂ (230 ° C., 2.16 kg) and
(B2) A heterophase propylene copolymer (HECO-2) containing an elastomer propylene copolymer (PC-2) and
(C) Includes an elastomer copolymer (EC) containing units derived from ethylene and units derived from C _{4 to} C _{20 α-olefin.}

The polypropylene composition (C2) is further preferably 25 g / 10 min or less, preferably 20 g / 10 min or less, more preferably 15 g / 10 min or less, even more preferably 10 g / 10 min or less, for example, in the range of 1 to 25 g / 10 min. _{Melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 in the range of 1-20 g / 10 min, more preferably in the range of 3-15 g / 10 min, even more preferably in the range of 5-10 g / 10 min. It may contain a propylene homopolymer (HPP-3) having.

The polypropylene composition (C2) contains the heterophase propylene copolymer (HECO-1) in an amount of at least 25 wt%, preferably at least 30 wt%, more preferably at least 35 wt%, based on the weight of the polypropylene composition (C2). More preferably at least 40 wt%, for example in the range of 25-70 wt%, preferably in the range of 30-60 wt%, more preferably in the range of 35-55 wt%, even more preferably in the range of 41-50 wt%. Recognized to include.

The heterophase propylene copolymer (HECO-1) contains propylene homopolymer (HPP-1) in an amount of at least 55 wt%, preferably at least 65 wt%, more preferably at least, based on the weight of the heterophase propylene copolymer (HECO-1). It is recognized that the amount is 80 wt%, preferably in the range of 65-90 wt%, more preferably in the range of 80-90 wt%, such as in the range of 55-95 wt%.

Further, the heterophase propylene copolymer (HECO-1) is an elastomer propylene copolymer (PC-1) in an amount of 45 wt% or less, preferably 35 wt% or less, more preferably based on the weight of the heterophase propylene copolymer (HECO-1). Is recognized to be contained in an amount of 20 wt% or less, preferably in the range of 10 to 35 wt%, more preferably in the range of 10 to 20 wt%, such as in the range of 5 to 45 wt%.

The polypropylene composition (C2) contains the heterophase propylene copolymer (HECO-2) in an amount of 35 wt% or less, preferably 25 wt% or less, more preferably 19 wt% or less, based on the weight of the polypropylene composition (C2). , For example, in the range of 8 to 35 wt%, preferably in the range of 10 to 25 wt%, more preferably in the range of 13 to 19 wt%.

The heterophase propylene copolymer (HECO-2) contains propylene homopolymer (HPP-2) in an amount of at least 35 wt%, preferably at least 45 wt%, more preferably at least, based on the weight of the heterophase propylene copolymer (HECO-2). It is recognized that the amount comprises 55 wt%, even more preferably at least 60 wt%, preferably in the range of 45-85 wt%, more preferably in the range of 55-75 wt%, such as in the range of 35-95 wt%.

Further, the heterophase propylene copolymer (HECO-2) is an elastomer propylene copolymer (PC-2) in an amount of 65 wt% or less, preferably 55 wt% or less, more preferably based on the weight of the heterophase propylene copolymer (HECO-2). Is preferably in the range of 15 to 55 wt%, more preferably in the range of 10 to 45 wt%, even more preferably in the range of 25 wt% or less, even more preferably 40 wt% or less, for example in the range of 5 to 65 wt%. It is recognized that it is included in the range of ~ 45 wt%.

Further, the polypropylene composition (C2) contains an elastomer ethylene copolymer (EC) in an amount of 30 wt% or less, preferably 25 wt% or less, for example, in the range of 8 to 30 wt%, based on the weight of the polypropylene composition (C2). , It is recognized that the content is preferably in the range of 10 to 30 wt%, more preferably in the range of 15 to 25 wt%.

Further, the polypropylene composition (C2) contains the filler (F) in an amount of 30 wt% or less, preferably 20 wt% or less, more preferably 14 wt% or less, based on the weight of the polypropylene composition (C2), for example. It is recognized that the inclusion is preferably in the range of 5-20 wt%, more preferably in the range of 10-14 wt%, such as in the range of 1-30 wt%.

Propylene homopolymer (HPP-3) is not an essential compound in the polypropylene composition (C2). However, when the propylene homopolymer (HPP-3) is contained in the polypropylene composition (C2), the propylene homopolymer (HPP-3) is in an amount of 25 wt% or less, preferably 25 wt% or less, based on the weight of the polypropylene composition (C2). It is recognized that the amount is 20 wt% or less, more preferably 15 wt% or less, for example, 0 to 20 wt%, preferably 1 to 20 wt%, preferably 5 to 15 wt%.

The polypropylene composition (C2) contains the additive (AD) in the range of 0.1 to 20 wt%, preferably 0.5 to 15 wt%, more preferably 0. It may be contained in an amount in the range of 5 to 10 wt%, more preferably in the range of 0.5 to 5.0 wt%.

Only polypropylene heterophase propylene copolymer (HECO-1), heterophase propylene copolymer (HECO-2), elastomeric ethylene copolymer (EC), optionally propylene homopolymer (HPP-3), and optionally polymer carrier material (PCM) It may be a polymeric component within the composition (C2), i.e., no other polymeric component may be present.

The polypropylene composition (C2) includes a heterophase propylene copolymer (HECO-1), a heterophase propylene copolymer (HECO-2), an elastomer ethylene copolymer (EC), a filler (F), and optionally a propylene homopolymer (HPP). -3) and optionally an additive (AD) may be composed.

Preferably, the homopolymer (HPP-1) and the propylene homopolymer (HPP-2) of the polypropylene composition (C2) are both inequality (IIIa'), preferably inequality (IIIb'), more preferably inequality (IIIc'). ), Even more preferably satisfy the inequality (IIId').
MFR (HPP-1) -MFR (HPP-2) ≧ 50 (IIIa')
170 ≧ MFR (HPP-1) -MFR (HPP-2) ≧ 50 (IIIb')
150 ≧ MFR (HPP-1) -MFR (HPP-2) ≧ 70 (IIIc')
125 ≧ MFR (HPP-1) -MFR (HPP-2) ≧ 90 (IIId')
Here, the MFR (HPP-1) is the melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 of the propylene homopolymer (HPP-1), and the MFR (HPP-2) is the propylene homopolymer. _{Melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 (HPP-2).

Preferably, the homopolymer (HPP-1) and the propylene homopolymer (HPP-2) of the polypropylene composition (C2) are both inequality (IVa'), preferably inequality (IVb'), more preferably inequality (IVc'). ), Even more preferably the inequality (IVd') is satisfied.
MFR (HPP-1) -MFR (HPP-3) ≧ 75 (IVa')
190 ≧ MFR (HPP-1) -MFR (HPP-3) ≧ 75 (IVb')
170 ≧ MFR (HPP-1) -MFR (HPP-3) ≧ 100 (IVc')
165 ≧ MFR (HPP-1) -MFR (HPP-3) ≧ 140 (IVd')
Here, MFR (HPP-1) is a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 of propylene homopolymer (HPP-1), and MFR (HPP-3) is a propylene homopolymer. _{Melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 of (HPP-3).

The polypropylene composition (C2) has a bending coefficient in the range of preferably 1500 to 1700 MPa, more preferably in the range of 1600 to 1700 MPa, such as at least 1400 MPa, preferably at least 1500 MPa, more preferably at least 1600 MPa, for example in the range of 1400 to 1800 MPa. It is recognized to have.

Further, the polypropylene composition (C2) is preferably in the range of 18-50 g / 10 min, such as at least 15 g / 10 min, preferably at least 18 g / 10 min, more preferably at least 20 g / 10 min, for example in the range of 15-100 g / 10 min. _{More preferably, it is recognized to have a melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 in the range of 20-40 g / 10 min.

It is the finding of the present invention that the density of the polypropylene composition (C2) can be reduced without negatively affecting mechanical properties such as rigidity and impact resistance. Accordingly the polypropylene composition (C2) is, 995kg / cm ³ or less, preferably 990kg / cm ³ or less, such as the range of 975~995kg / cm ^3, preferably in the range of 975~990kg / cm ^3, more preferably 975～ It is recognized that it has a density measured according to ISO 1183-187 in the range of 985 kg / cm ^3.

All components used in the preparation of this composition, ie the propylene composition (C2), are known. Therefore, the preparation of their components is also well known.

Extruders with heterophase propylene (HECO-1), heterophase propylene (HECO-1), elastomeric ethylene copolymer (EC), filler (F), optionally propylene homopolymer (HPP-3), and optionally additives ( The polypropylene composition (C2) can be prepared by adding AD) and extruding them.

Heterophase propylene copolymer (HECO-1)
As shown above, the expression "heterogeneous" indicates that at least one elastomer copolymer is (finely) dispersed in the matrix. The heterophase composition (HECO-1) preferably comprises (semi-crystalline) polypropylene as a matrix and an elastomeric propylene copolymer dispersed in the matrix. It is recognized that the heterophase propylene copolymer (HECO-1) contains at least a propylene homopolymer (HPP-1) as a matrix, and at least the elastomeric propylene copolymer (PC-1) is dispersed in the matrix.

Given above for propylene homopolymers (HPP-1) and elastomeric propylene copolymers (PC-1) in relation to the heterophase propylene composition (HC) of the propylene composition (C1) (including numbers and ranges). The definition can also be applied to heterophase propylene copolymers (HECO-1).

It is recognized that the heterophase propylene copolymer (HECO-1) is nucleated, especially α-nucleated. Therefore, it is recognized that the heterophase propylene copolymer (HECO-1) contains an α-nucleating agent. Preferably, the heterophase propylene composition (HC) does not contain a β nucleating agent. The disclosure for the selection and application of nucleating agents provided for the heterophase propylene composition (HC) of the propylene composition (C1) applies equally to the heterophase propylene copolymer (HECO-1).

The comonomer content of the heterophase propylene copolymer (HECO-1), such as the ethylene content, may be in the range of 5 to 20 mol%, preferably in the range of 5 to 15 mol%.

The comonomer content of the xylene-soluble component fraction (XCS) of the heterophase propylene copolymer (HECO-1), such as the ethylene content, is preferably in the range of 30-60 mol%, more preferably in the range of 35-55 mol%, even more preferably. Is in the range of 40 to 55 mol%.

Regarding the definition of the comonomer present in the heterophase propylene copolymer (HECO-1) and / or the definition of the comonomer present in the xylene-soluble component fraction (XCS) of the heterophase propylene copolymer (HECO-1), the definition of the comonomer present in the propylene composition (C1). Reference is made to the definition of comonomer of elastomeric propylene copolymer (PC-1).

Preferably, the amount of xylene-soluble component fraction (XCS) of the heterophase propylene copolymer (HECO-1) is 45 wt% or less, preferably 35 wt% or less, more preferably 20 wt% based on the weight of the heterophase propylene copolymer (HECO-1). % Or less, still more preferably in the range of 5 to 45 wt%, even more preferably in the range of 10 to 35 wt%, and even more preferably in the range of 10 to 20 wt%.

The intrinsic viscosity of the xylene soluble component fraction (XCS) affects the impact strength and fluidity of the polypropylene composition. High intrinsic viscosity of the xylene-soluble component fraction (XCS) improves impact strength but reduces fluidity. Therefore, it is necessary to balance the intrinsic viscosity of the xylene-soluble component fraction (XCS).

The intrinsic viscosity (IV) measured according to ISO 1265-1 (135 ° C. in decalin) of the xylene-soluble component fraction (XCS) of the heterophase propylene copolymer (HECO-1) is 3.2 dl / g or less, preferably 3.0 dl / g. G or less, more preferably 2.5 dl / g or less, for example, 1.5 to 3.2 dl / g, preferably 1.5 to 3.0 dl / g, more preferably 2.0 to 2. It is recognized that the range is 5 dl / g.

The heterophase propylene copolymer (HECO-1) can be produced by mixing different components, namely propylene homopolymer (HPP-1) and elastomer propylene copolymer (PC-1). Alternatively, the heterophase propylene copolymer (HECO-1) can be produced in a sequential step process with multiple reactors operating under different reaction conditions in a continuous configuration.

The heterophase propylene copolymer (HECO-1) is preferably produced in a multi-step process known in the art, wherein the matrix or propylene homopolymer (HPP-1) is produced in at least one slurry reactor and then the elastomer. Copolymers or propylene copolymers (PC-1) are produced in at least one, preferably two vapor phase reactors. Typical Ziegler-Natta catalysts can be used as catalysts, see WO 92/19653 and WO 99/24479.

The heterophase propylene copolymer (HECO-1) is commercially available.

Heterophase propylene copolymer (HECO-2)
As shown above, the expression "heterogeneous" indicates that at least one elastomer copolymer is (finely) dispersed in the matrix. The heterophase composition (HECO-2) preferably comprises (semi-crystalline) polypropylene as a matrix and an elastomeric propylene copolymer dispersed in the matrix. It is recognized that the heterophase propylene copolymer (HECO-2) contains at least a propylene homopolymer (HPP-2) as a matrix, and at least the elastomeric propylene copolymer (PC-2) is dispersed in the matrix.

Given above for propylene homopolymers (HPP-2) and elastomeric propylene copolymers (PC-2) in relation to the heterophase propylene composition (HC) of the propylene composition (C1) (including numbers and ranges). The definition can also be applied to heterophase propylene copolymers (HECO-2).

It is recognized that the heterophase propylene copolymer (HECO-1) is nucleated, especially α-nucleated. Therefore, it is recognized that the heterophase propylene copolymer (HECO-1) contains an α-nucleating agent. Preferably, the heterophase propylene composition (HC) does not contain a β nucleating agent. The disclosure for the selection and application of nucleating agents provided for the heterophase propylene composition (HC) of the propylene composition (C1) applies equally to the heterophase propylene copolymer (HECO-1).

The comonomer content of the heterophase propylene copolymer (HECO-2), such as the ethylene content, is in the range of 10 to 30 mol%, preferably in the range of 10 to 25 mol%, more preferably in the range of 15 to 20 mol%.

The comonomer content of the xylene-soluble component fraction (XCS) of the heterophase propylene copolymer (HECO-2), such as the ethylene content, is in the range of 30-60 mol%, preferably in the range of 30-55 mol%, more preferably in the range of 40-55 mol. It is in the range of%.

Regarding the definition of the comonomer present in the heterophase propylene copolymer (HECO-2) and / or the definition of the comonomer present in the xylene-soluble component fraction (XCS) of the heterophase propylene copolymer (HECO-2), the definition of the comonomer present in the propylene composition (C1). Reference is made to the definition of comonomer of elastomeric propylene copolymer (PC-2).

Preferably, the amount of xylene-soluble component fraction (XCS) of the heterophase propylene copolymer (HECO-2) is 65 wt% or less, preferably 55 wt% or less, more preferably 45 wt% based on the weight of the heterophase propylene copolymer (HECO-2). % Or less (eg, 40 wt% or less), even more preferably in the range of 5 to 65 wt%, even more preferably in the range of 15 to 55 wt%, even more preferably in the range of 10 to 45 wt%, for example in the range of 25 to 45 wt%. And so on.

As shown above, the intrinsic viscosity of the xylene soluble component fraction (XCS) affects the impact strength and fluidity of the polypropylene composition. High intrinsic viscosity of the xylene-soluble component fraction (XCS) improves impact strength but reduces fluidity. Therefore, it is necessary to balance the intrinsic viscosity of the xylene-soluble component fraction (XCS).

The intrinsic viscosity (IV) measured according to ISO 1265-1 (135 ° C. in decalin) of the xylene-soluble component fraction (XCS) of the heterophase propylene copolymer (HECO-2) is 3.0 dl / g or less, preferably 2.5 dl / g. It is recognized that it is preferably in the range of 2.0 to 3.0 dl / g, such as g or less, for example, the range of 1.5 to 3.0 dl / g.

The heterophase propylene copolymer (HECO-2) can be produced by mixing different components, namely propylene homopolymer (HPP-2), with an elastomeric propylene copolymer (PC-2). Alternatively, the heterophase propylene copolymer (HECO-2) can be produced in a sequential step process with multiple reactors operating under different reaction conditions in a continuous configuration.

The heterophase propylene copolymer (HECO-2) is preferably produced in a multi-step process known in the art, where the matrix or propylene homopolymer (HPP-2) is produced in at least one slurry reactor and then the elastomer. Copolymers or propylene copolymers (PC-2) are produced in at least one, preferably two vapor phase reactors. Typical Ziegler-Natta catalysts can be used as catalysts, see WO 92/19653 and WO 99/24479.

The heterophase propylene copolymer (HECO-2) is commercially available.

Propylene homopolymer (HPP-3), elastomer ethylene copolymer (EC), filler (F), and additive (AD)
Propylene homopolymers (HPP-3), elastomeric ethylene copolymers (EC), fillers (F), and additives (AD) defined in detail for the heterogeneous propylene composition (HC) of the propylene composition (C1). The definition given above can also be applied to the propylene composition (C2).

Therefore, the propylene composition (C2) is a specific embodiment of the propylene composition (C1).

Automotive Articles In a third aspect, the present invention is directed to an automotive article comprising a polypropylene composition (C1) or a polypropylene composition (C2).

Preferably, the automotive article is at least 80 wt%, such as 80-99.9 wt%, more preferably at least 90 wt%, such as 90-99.9 wt%, even more preferably at least 95 wt%, such as 95-99.9 wt%. % And other polypropylene compositions (C1) or polypropylene compositions (C2). In one embodiment, the automotive article comprises a polypropylene composition (C1) or a polypropylene composition (C2).

Recognized that automotive articles have bending coefficients in the range of preferably in the range of 1500 to 1700 MPa, more preferably in the range of 1600 to 1700 MPa, such as at least 1400 MPa, preferably at least 1500 MPa, more preferably at least 1600 MPa, for example in the range of 1400 to 1800 MPa. Will be done.

Preferably, the automotive article is an article inside or outside the vehicle, the latter being preferred. In particular, the automotive article is preferably selected from the group consisting of bumpers, lock panels, and sill plates, with bumpers being particularly preferred.

Automotive articles are typically molded articles, preferably injection molded articles or compression molded articles. It is recognized that the automobile article is an injection molded article or a compression molded article, and the former is particularly preferable.

It should be understood that the above applies to both polypropylene compositions (C1) and polypropylene compositions (C2).

Use In the fourth aspect, the present invention is directed to the use of polypropylene compositions (C1) or polypropylene compositions (C2) in automotive articles, preferably the aforementioned automotive articles.

1. 1. Definition / Measurement Methods Unless otherwise defined, the definitions and determination methods for the following terms also apply to the general description of the invention above and the examples below.

Quantification of microstructure by NMR spectroscopy:
Quantitative nuclear magnetic resonance (NMR) spectroscopy is used to quantify the isotacticity and positional regularity of polypropylene homopolymers.

^{Quantitative 13} C { ¹ H} NMR spectra were recorded in solution using a Bruker Advance III 400 NMR spectrometer operating at 40.15 MHz and 100.62 MHz for ¹ H and ^{13 C, respectively. All spectra were recorded using a 13} C optimized 10 mm extended temperature probe head at 125 ° C. with nitrogen gas for all air pressures.

Respect polypropylene homopolymer was dissolved in the material of about 200 mg 1,2-tetrachloroethane _{(tetrachloroethane) -d 2 (TCE-} d 2). To ensure a homogeneous solution, the NMR tubes were further heated in a rotating oven for at least 1 hour after the initial sample preparation in the heat block. The tube was rotated at 10 Hz during insertion into the magnet. This setup was selected primarily for the high resolution required for stereoregular distribution quantification (Busico, V., Cipillo, R., Prog. Polymer. Sci. 26 (2001) 443; Busico, V. .; Cipullo, R., Monaco, G., Vacatello, M., Segre, AL, Macromolecules 30 (1997) 6251). Standard single-pulse excitation was used with NOE and bi-level WALTZ16 decoupling schemes (Zhou, Z., Kuemmerle, R., Qiu, X., Redwine, D., Kong, R., Taha, A. , Bough, D. Winniford, B., J. Mag. Reson. 187 (2007) 225; Busico, V., Carbonniere, P., Pulselo, R., Pelleccia, R., Severn, J., Talarico, G., Schemel. Rapid Commun. 2007, 28, 11289). A total of 8192 (8k) transients were obtained per spectrum.

^{Quantitative 13} C { ¹ H} NMR spectra were processed and integrated using a proprietary computer program, and the relevant quantitative properties were determined from the integrated values.

For polypropylene homopolymers, all chemical shifts are internally referenced for the methyl isotactic pentad (mm mm) at 21.85 ppm.

Site defects (Resconi, L., Cavallo, L., Fahrenheit, A., Piemontesi, F., Chem. Rev. 2000, 100, 1253 ;; Wang, WJ, Zhu, S., Macromolecules 33 (2000) ), 1157; Cheng, H.N., Macromolecules 17 (1984), 1950) or feature signals corresponding to comonomer were observed.

The stereoregularity distribution was quantified by integrating the methyl region between 23.6 and 19.7 ppm with corrections for arbitrary sites not related to the desired conformation (Busico, V., Cipilllo, R., Prog. Polymer. Sci. 26 (2001) 443; Busico, V., Cipullo, R., Monaco, G., Vacatello, M., Segre, AL, Macromolecules 30 (1997) 6251).

Specifically, the effects of site defects and comonomer on the quantification of stereoregular distribution were corrected by subtracting representative site defects and comonomer integral values from the specific integration region of the configuration.

Isotacticity was determined at the pentad level and reported as a percentage of the isotactic pentad (mmmm) sequence to the total pentad sequence.
[Mmm]% = 100 * (mmmm / total of all pentads)

The presence of 2,1 erythro site defects was indicated by the presence of two methyl sites at 17.7 ppm and 17.2 ppm and confirmed by other feature sites. No feature signals corresponding to other types of site defects were observed (Resconi, L., Cavallo, L., Fahrenheit, A., Piemontesi, F., Chem. Rev. 2000, 100, 1253).

The amount of 2,1 erythro site defects was quantified using the average integral of the two characteristic methyl sites at 17.7 ppm and 17.2 ppm.
P _21e = (I _e6 + I _e8 ) / 2

The amount of 1,2, primary insertion propene was quantified based on the methyl region, and corrections were made for sites included in this region not related to primary insertion and primary insertion sites excluded from this region.
P ₁₂ = I _CH3 + P _12e

The total amount of propene was quantified as the sum of the primary insertion propene and all other existing site defects.
P _total = P ₁₂ + P _21e

The mole percent of 2,1-erythro site defects was quantified for all propenes.
[21e] mol% = 100 * (P _21e / P _total )

Observe the feature signals corresponding to the uptake of ethylene (as described in Cheng, H.N., Macromolecules 1984, 17, 1950) and use the comonomer fraction as the fraction of ethylene in the polymer for all the monomers in the polymer. Calculated.

WJ. Wang and S.M. The comonomer fraction was quantified by integrating multiple signals over the entire spectral region of ^{the 13} C { ¹ H} spectrum using the method of Zhu, Macromolecules 2000, 33 1157. This method was chosen because of its robust nature and the presence of site defects when needed. The integration region was slightly adjusted to increase the applicability over the entire range of comonomer content encountered.

The mole percent comonomer uptake was calculated from the mole fraction.

Weight percent comonomer uptake was calculated from the mole fraction.

MFR ₂ (230 ° C.) is measured according to ISO 1133 (230 ° C., 2.16 kg load).

MFR ₂ (190 ° C.) is measured according to ISO 1133 (190 ° C., 2.16 kg load).

Low temperature xylene soluble component (XCS, wt%): The content of the low temperature xylene soluble component (XCS) is determined at 25 ° C. according to ISO 16152; 1st edition; 2005-07-01.

The bending coefficient was determined for a three-point bending according to ISO 178 for an 80 × 10 × 4 mm injection molded sample prepared according to ISO 294-1: 1996.

The median particle size (D ₅₀ ) and top cut (D ₉₅ ) are calculated from the particle size distribution determined by laser diffraction according to ISO 1330-1: 1999.

Density is measured according to ISO 1183-1: 2004 / Method A. Sample preparation is performed by compression molding according to ISO 1872-2: 2007.

Multiaxial impacts (2.2 m / s, 23 ° C. and −30 ° C.) were determined according to ASTM D3763.

Intrinsic viscosity is measured according to DIN ISO 1628/1, October 1999 (135 ° C. in decalin).

Charpy impact test:
Charpy (notched / non-notched) impact strength (Charpy NIS / IS) was prepared using an 80 × 10 × 4 mm ³ injection molded bar test sample prepared according to ISO 294: 1: 1996. Measured at 23 ° C and -30 ° C according to ISO179 2C / DIN 53453.

The surface area is _{defined by nitrogen (N 2} ) as the BET surface according to ISO 787-11.

Shrinkage: ISO 294-1

The weight reduction percentage is determined by cutting a sample having a size of 60 cm x 60 cm from the area to which the license plate of the rear bumper prepared by injection molding of the compositions IE1 and IE2 of the present invention and the comparative composition CE1 is attached. The sample is maintained for 48 hours at a temperature of 22 ° C. ± 3 ° C. and a humidity of 50% ± 5. After that, Mettler Toledo International Inc. The weight of the sample is determined by ME2002 / 02 (Shanghai, China), and the weight reduction rate is calculated according to the formula (V).
(W _0- W) / W ₀ x 100% (V)
Here, W ₀ is the weight of the sample prepared from the comparative composition CE1, and W is the weight of the sample prepared from each of the compositions IE1 and IE2 of the present invention.

2. Examples The present invention is shown by the following examples.

The propylene compositions IE1 and IE2 of the present invention are based on the formulation table summarized in Table 1.

"HECO-1" is an heterophase propylene copolymer as shown in Table 2.

"HECO-2" is an heterophase propylene copolymer as shown in Table 3.

"HPP-3" is a commercially available propylene homopolymer as shown in Table 4.

“EC-1” is a commercially available ethylene copolymer “Engage 7467” of Dow Chemical Company as shown in Table 4.

“EC-2” is a commercially available ethylene copolymer “Engage 8200” from Dow Chemical Company as shown in Table 4.

“F” is a commercially available talc “Jetfine T1CA” from Imerys Talk (France), with a median particle size of 4.2 μm (D ₅₀ ), a cutoff particle size of 8.9 μm (d ₉₅ ), and 12. It has a BET surface area of 6 m ^{2 / g.}

"CE1" is a commercially available propylene composition "EF209AEC" from Borogue (Shanghai).

The heterophase propylene copolymer (HECO-1) used in Examples IE1 and IE2 of the present invention was prepared by the known Borstar® technology disclosed in, for example, European Patent Application Publication No. 0.887,379A1. ..

The catalysts used in the polymerization process for the preparation of the heterophase propylene copolymers (HECO-1) and (HECO-3) (Examples IE1 and IE2 of the present invention) were produced as follows. First, 0.1 mol of MgCl ₂ × 3 EtOH was suspended in 250 ml of decan under inert conditions in an atmospheric pressure reactor. The solution was cooled to a temperature of −15 ° C. and 300 ml of cold TiCl ₄ was added while maintaining the temperature at the above levels. The temperature of the slurry was then slowly raised to 20 ° C. At this temperature, 0.02 mol of dioctyl phthalate (DOP) was added to the slurry. After the addition of phthalate, the temperature was raised to 135 ° C. for 90 minutes and the slurry was left for 60 minutes. An additional 300 ml of TiCl ₄ was then added and the temperature was kept at 135 ° C. for 120 minutes. After this, the catalyst was filtered from the liquid and washed 6 times with 300 ml heptane at 80 ° C. The solid catalyst component was then filtered and dried. The concept of a catalyst and its preparation is generally described, for example, in Japanese Patent Publication No. 491566, European Patent No. 591224, and European Patent No. 586390. Triethylaluminium (TEAL) was used as a co-catalyst, and dicyclopentyldimethoxysilane [(C ₅ H ₉ ) ₂ Si (OCH ₃ ) ₂ ] was used as a donor. The ratio of aluminum to donor is shown in Table 2.

For the heterophase propylene copolymer (HECO-2), prepolymerization of the catalyst with an amount of vinylcyclohexane such that a concentration of 200 ppm of poly (vinylcyclohexane) (PVCH: poly (vinyl cyclohexane)) is achieved in the final polymer. bottom. Each process is described in European Patent No. 1 028 984 and European Patent No. 1 183 307.

The propylene compositions IE1 and IE2 of the present invention are produced by melt mixing. The compositions of the present invention are based on the recipes summarized in Table 1 and are prepared by using a Coperion STS-35 twin screw extruder (Coperion (Nanjing) Corporation, available from China) with a diameter of 35 mm. .. The twin screw extruder operates at an average screw speed of 400 rpm with a zone temperature profile of 180-220 ° C. Its L / D is 44. Table 4 lists the temperature, throughput, and screw speed of each zone of the extruder for preparing the compositions of Examples IE1 and IE2 of the present invention.

The temperature, throughput, and screw speed of each zone of the extruder are the leading parameters and are set in the control panel of the extruder. The melt temperature (the temperature of the melt in the die) and the torque of the extruder are passive parameters shown on the control panel of the extruder. A vacuum pump (bump) is located in zone 9 to generate a depressurization of -0.6 MPa inside the extruder.

Bumpers are prepared using the compositions IE1 and IE2 of the present invention by injection molding with the Engel Duo 4000 of the Engel Group Company (Austria). The process conditions are shown in Table 5.

Bumpers are prepared using the comparative composition CE1 by injection molding with the Engel Duo 4000 of the Engel Group Company (Austria) under process conditions similar to those applied to the preparation of bumpers from the compositions IE1 and IE2 of the present invention. ..

Bumpers prepared from the composition IE1 of the present invention ( _{having MFR 2 of} 24 g / 10 min) have an average thickness of 2.8 mm.

Bumpers prepared from the composition IE2 of the present invention ( _{having MFR 2 of} 35 g / 10 min) have an average thickness of 2.5 mm.

In addition to the densities of the compositions IE1 and IE2 of the present invention being lower than the densities of the comparative composition CE1, the reduction in average thickness contributes to weight reduction. To prepare a thin-walled bumper (eg, an average thickness of 2.5 mm) by injection molding, at least 18 g / 10 min. Only compositions having MFR ₂ (230 ° C., 2.16 kg) can be used.

From Table 1, it can be seen that the compositions IE1 and IE2 of the present invention have similar properties to the comparative composition CE1. Furthermore, it can be seen that the bumper prepared from the composition IE1 of the present invention exhibits a weight reduction of 6.7% as compared with the bumper prepared from the comparative composition CE1 due to the reduced density. Furthermore, it can be seen that the bumpers prepared from the composition IE2 of the present invention exhibit a 13% weight reduction as compared to the bumpers prepared from the comparative composition CE1 due to the reduced density and reduced average thickness.

Claims (10)

(A) Heterophase propylene copolymer (HECO-1), (b) Heterophase propylene copolymer (HECO-2), (c) Propylene homopolymer (HPP-3), (d) Elastomer copolymer (EC), ( e) A polypropylene composition (C2) comprising a filler (F) and optionally an additive (AD).
(A) The heterophase propylene copolymer (HECO-1) is
( A1 ) A propylene homopolymer (HPP-1) having a melt flow rate of MFR _{2 (230 ° C., 2.16 kg) measured according to ISO 1133 of 150-170 g / 10 min.}
(A2) Containing with elastomeric propylene copolymer (PC-1)
(B) The heterophase propylene copolymer (HECO-2) is
(B1) A propylene homopolymer (HPP-2) having _{a melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 in the range of 30-90 g / 10 min.
(B2) Containing with elastomeric propylene copolymer (PC-2)
(C) The propylene homopolymer (HPP-3) contains a vinylcycloalkane polymer and / or a vinylalkanepolymer having a bending coefficient in the range of 1900 to 2300 MPa and used as an α nucleating agent, and the vinylcyclo alkane polymer and / or vinyl alkane polymers, the propylene homopolymer presence of (HPP-3) Ziegler-Natta procatalyst in the preparation ^{_{of, CH 2 = CH-CHR 3}} R 4 ( wherein, ^{R 3} and ^{R 4} are Both are formed by polymerizing vinyl compounds having 5- or 6-membered saturated, unsaturated or aromatic rings (representing alkyl groups containing 1 to 4 carbon atoms independently).
(D) The elastomer copolymer (EC) contains units derived from ethylene and units derived from C _{4 to} C ₂₀ α-olefin.
(E) The filler (F) is present in the polypropylene composition (C2) in the range of 10 to 14 wt% based on the weight of the polypropylene composition (C2).
Polypropylene composition (C2). Wherein the polypropylene composition, 25 g / 10min measured according to the following ISO 1133 was melt flow rate _MFR 2 (230 ℃, 2.16kg) propylene homopolymer having (HPP-3) to including, according to claim 1 Polypropylene composition (C2). The polypropylene composition is
(A) The heterophase propylene copolymer (HECO-1) in an amount of at least 25 wt% based on the weight of the polypropylene composition (C2).
And / or (b) the heterophase propylene copolymer (HECO-2), in an amount ranging from 8 to 35 wt% based on the weight of the polypropylene composition (C2).
And / or (c) the elastomeric ethylene copolymer (EC), in an amount in the range of 8-30 wt% based on the weight of the polypropylene composition (C2).
And / or (d) the propylene homopolymer in an amount ranging from 5 20 wt% based on the weight of the polypropylene composition (C2) (HPP-3)
The polypropylene composition (C2) according to claim 1 or 2, which comprises. (A) The comonomer content of the xylene-soluble component fraction (XCS) of the heterophase propylene copolymer (HECO-1) is in the range of 30 to 50 mol%.
And / or (b) The comonomer content of the xylene-soluble component fraction (XCS) of the heterophase propylene copolymer (HECO-2) ranges from 30 to 50 mol% based on the weight of the heterophase propylene copolymer (HECO-2). The polypropylene composition (C2) according to any one of claims 1 to 3. (A) The comonomer content of the heterophase propylene copolymer (HECO-1) is in the range of 5 to 20 mol% based on the weight of the heterophase propylene copolymer (HECO-1).
And / or (b) The comonomer content of the heterophase propylene copolymer (HECO-2) is in the range of 10 to 30 mol% based on the weight of the heterophase propylene copolymer (HECO-2), claims 1 to 4. The polypropylene composition (C2) according to any one of the above. (A) The intrinsic viscosity (IV) measured according to ISO 1265-1 (decalin) of the xylene-soluble component fraction (XCS) of the heterophase propylene copolymer (HECO-1) is in the range of 1.5 to 3.0 dl / g. can be,
And / or (b) the intrinsic viscosity (IV) measured according to ISO 1265-1 (decalin) of the xylene-soluble component fraction (XCS) of the heterophase propylene copolymer (HECO-2) is 1.5 to 3.2 dl / g. The polypropylene composition (C2) according to any one of claims 1 to 5, which is in the range of. The elastomer ethylene copolymer (EC) is
_{(A) Melt flow rate MFR 2} (190 ° C., 2.16 kg) measured according to ISO 1133 in the range 0.1-15 g / 10 min,
And / or (b) the polypropylene composition (C2) according to any one of claims 1 to 6, having a density in the range of ^{830 to 890 kg / cm 3.} The polypropylene according to any one of claims 1 to 7, _{wherein the polypropylene composition has a melt flow rate MFR 2} (230 ° C., 2.16 kg) measured according to ISO 1133 in the range of 18-50 g / 10 min. Composition (C2). An automobile article comprising the polypropylene composition (C2) according to any one of claims 1 to 8. Use of the polypropylene composition (C2) according to any one of claims 1 to 8 in an automobile article.