Thermoplastic polyolefin composition

FIELD: chemistry.

SUBSTANCE: invention relates to a heterophase propylene composition for making articles by injection moulding, as well as a composition for improving strength of polypropylene at low temperatures. The composition contains a polypropylene matrix, an elastomer copolymer containing ethylene links, at least one C3-C20 α-olefin and optionally an unconjugated diene, high-density polyethylene which is bimodal or multimodal polyethylene and inorganic filler.

EFFECT: disclosed heterophase polypropylene has acceptable impact characteristics at -40°C without loss of hardness.

14 cl, 3 tbl, 14 ex

 

The present invention relates to a new composition containing heterophase polypropylene, filler and polyethylene, as well as the preparation and application of the specified composition.

Polypropylene is a material preferred for use in many cases, as it can be adapted to the specific task. For example, the heterophase polypropylene widely used in the automotive industry (for example, in the manufacture of bumpers), because they combine good rigidity with acceptable impact properties. Heterophase polypropylene contain polypropylene matrix in which the dispersed amorphous phase. The amorphous phase contains propylene copolymer rubber such as ethylene-propylene rubber (EPA) or a polymer based on ethylene-propylene-diene monomer (EPDM). In addition, heterophase polypropylene contains some amount of crystalline polyethylene. In the automotive industry such varieties heterophase polypropylene contain propylene copolymer rubber in an amount of about 30 wt.%, which is usually obtained directly in one or two gas phase reactors or add to the matrix from the outside at the stage of obtaining a mixture. These materials typically used in combination with 10-20 wt.% filler, such as talc, that, in General, p is igodit to obtain materials, providing a good balance of stiffness and toughness.

In particular, the impact strength at low temperature is a key property, because cars are used throughout the year and in different climatic zones. In winter, the danger of breakage is unacceptably high, if the impact strength, particularly at -20°C or below, will be insufficient. More and more often in the automotive industry there is a need for materials exhibiting not only a good impact properties at low temperatures, but also exceptional impact properties at very low temperatures, which allows the use of heterogeneous material regardless of the respective geographical conditions. To ensure these requirements are met, manufacturers of vehicles in need of such varieties heterophase polypropylene, which have a very good impact strength, measured at -40°C.

So far, it was impossible to get the heterophase polypropylene with acceptable impact characteristics at -40°C without loss of rigidity. The main problem was that at these very low temperatures conventional rubber-modified polypropylene, already shows low impact properties, as components of the rubber phase (or phase in General) freeze when achievement is the glass transition temperature of the rubber phase. For example, in EP 1401894 A1 proposed propylene polymers with improved properties, in particular, combining high. the rigidity and impact strength due to a combination of polypropylene with selective β-nucleation, which, however, has not led to sufficient toughness at temperatures of -20°C or below, and, moreover, these polymers had low thermo-mechanical stability, due to the lower melting point of the β-modification. Also in U.S. patent 4363885 described the composition of the propylene polymer used in the manufacture of bumpers, obtained by combining heterophase polypropylene copolymer with EPA-elastomer and tolkovym filler; however, for the preparation of specified composition requires a special chamber kneading machine type Bunbury, which is associated with the nature of the applied elastomer, with adequate impact strength at temperatures below -30°C is not reached. Furthermore, in U.S. patent 5086109 proposed composition of the polypropylene resin based on polypropylene, optionally containing a combination of EPA or EPDM with gidrirovanny a block copolymer consisting of a terminal block of an aromatic vinyl compound and the intermediate block of the conjugated diene polymer (styrene elastomer), as well as flaky mineral fill the spruce; however, this composition does not reach the junction temperature in a fragile state below -20°C, and requires relatively expensive styrene elastomer component.

Thus, the present invention is the provision of heterophase polypropylene, with good rigidity and excellent impact characteristics at very low temperatures, i.e. at temperatures much below -20°C, preferably below -30°C, for example, at -40°C.

The present invention is based on the discovery of the fact that heterophase polypropylene requires the introduction of an additive which improves the dispersion of the rubber phase and at the same time has a positive effect on impact properties. More precisely, the present invention is based on the discovery of the fact that polyethylene is bimodal or multimodal nature must be entered in heterophase polypropylene. In addition, according to the present invention has also been found that the introduction preferably can be performed, if polyethylene is bimodal or multimodal nature of pre-mixed with the elastomeric component before adding to the heterophase polypropylene.

Thus, in the first aspect of the present invention relates to a composition (C)containing

(a) a polypropylene matrix (M-PP),

(b) at least one elastomeric copolymer (EP)containing units derived from

(i) ethylene,

(ii) at least one C3-C20α-olefin, and

(iii) may be non-conjugate diene;

(c) high density polyethylene (HDPE), a bimodal or multimodal polyethylene, and

(d) the filler (H), such as an inorganic filler (H).

The present invention includes various polymeric materials. However, these materials are not cross-linked, for example, by applying agents for cross-linking.

Preferably the elastomeric copolymer (copolymer) (EP), high density polyethylene (HDPE) and the filler (H) dispersed in a specified polypropylene matrix (M-PP). In other words, the elastomeric copolymer (copolymer) (EP) and high density polyethylene (HDPE) form inclusions, which are dispersed in the polypropylene matrix (M-PP). Thus, the present invention applies in particular to the so-called heterophase system. Accordingly, the present invention can also be defined as heterophase polypropylene composition (H-PP), containing

(a) polipropilenovuyu matrix (M-PP); and

(b) at least one elastomeric copolymer (EP), with the specified elastomeric copolymer (copolymer) (EP) contains jingle is, derived from

(i) ethylene,

(ii) at least one C3-C20α-olefin, and

(iii) may be non-conjugate diene;

(c) high density polyethylene (HDPE), a bimodal or multimodal polyethylene; and

(d) the filler (H), such as an inorganic filler (H),

while the elastomeric copolymer (EP) and high density polyethylene (HDPE) formed together or separately inclusion within the polypropylene matrix (M-PP).

In other words, the polypropylene matrix (M-PP) contains a (small) dispersed inclusions which are not part of the matrix, the inclusions contain either the elastomeric copolymer (EP), or high density polyethylene (HDPE). The term "inclusion" according to the present invention will preferably indicate that the polypropylene matrix (M-PP) and the inclusion form a different phase inside heterophase polypropylene composition (H-PP), these inclusions can be seen, for example, using high-resolution microscopy, such as electron microscopy or atomic force microscopy.

In addition, the inclusion may also contain a filler (H); however, preferably the filler (H) forms a separate inclusion within the polypropylene matrix (M-PP). According to another implementation variant of the Britania, the polypropylene matrix (M-PP) contains a (small) dispersed inclusions which are not part of the matrix, the inclusions contain elastomeric copolymer (EP) and high density polyethylene (HDPE). In this case, the high density polyethylene (HDPE) may, on its part, it is preferable to form inclusion (finely dispersed) within the elastomeric copolymer (EP).

The specified composition (K), i.e. the specified heterophase polypropylene composition (H-PP), preferably contains

(a) a polypropylene matrix (M-PP) in an amount of at least 36 wt.%, for example, 36-81 wt.%, preferably, at least 45 wt.%, for example, 45-72 wt.%,

(b) an elastomeric copolymer (copolymer) (EP) in an amount of at least 6 wt.%, for example, 6-72 wt.%, preferably at least 9 wt.%, for example, 9-56 wt.%,

(c) high density polyethylene (HDPE) in an amount of at least 3 wt.%, for example, 3-27 wt.%, preferably at least 6 wt.%, for example, 6-27 wt.% or 6-18 wt.%, more preferably at least 7 wt.%, for example, 7-27 wt.% or 7-18 wt.%, and

(d) the filler (H) in an amount of at least 5 wt.%; 5-20 wt.%, preferably 8 to 15 wt.%,

relative to the weight of the entire composition (K), more preferably, relative to the total mass of the polypropylene matrix (M-P is), the elastomeric copolymer (copolymer) (EP), high density polyethylene (HDPE) and filler (H).

Thus, according to a particularly preferred implementation variant, the composition (K), i.e. specified heterophase polypropylene composition (H-PP), contains

(a) a polypropylene matrix (M-PP) 45-72 wt.%,

(b) an elastomeric copolymer (copolymer) (EP) 9-56 wt.%,

(c) high density polyethylene (HDPE) in an amount of 6 to 18 wt.%, for example, 7-18 wt.%, and

(d) the filler (H) in an amount of 8-15 wt.%,

relative to the weight of the entire composition (K), more preferably relative to the total mass of the polypropylene matrix (M-PP), the elastomeric copolymer (copolymer) (EP), high density polyethylene (HDPE) and filler (H).

Due to the high content of the elastomeric copolymer (copolymer) (EP) century composition (K), i.e. in the specified heterophase polypropylene composition (H-PP), the content of the components of the composition (C), soluble in xylene (CU), i.e. the contents of the specified heterophase polypropylene composition (H-PP), are also quite high, i.e. at least 12 wt.%, more preferably is in the range of 20-70 wt.%, for example, 30-50 wt.%.

The preferred weight ratio between the weight of high density polyethylene (HDPE) and summary the th weight of the elastomeric copolymer (copolymer) (EP) is from 1:10 to 2:1, preferably, from 1:8 to 1:2.

More preferably, the present composition (K), i.e. the specified heterophase polypropylene composition (H-PP), contains as polymer components only the polypropylene matrix (M-PP), high density polyethylene (HDPE) and the elastomeric copolymer (copolymer) (EP). In other words, the composition (K), i.e. the specified heterophase polypropylene composition (H-PP), may optionally contain additives and filler (H), but not the other polymer in an amount exceeding 5 wt.%, more preferably greater than 3 wt.%, for example, greater than 1 wt.%, relative to the weight of the entire composition (K). One of the additional polymers which may be present in such low quantities, is a polyethylene, which is a reaction product formed during the synthesis of one of the components used in obtaining according to the proposed invention (see detail below). Accordingly, in particular, it becomes clear that the composition (K) contains only the polypropylene matrix (M-PP), high density polyethylene (HDPE), the elastomeric copolymer (copolymer) (EP) and polyethylene in amounts mentioned in this paragraph.

Unexpectedly, it was found that the composition (C) according to the present invention can overcome the disadvantages of the heterophase system is eat, known in the art. New track (K) shows excellent impact properties at very low temperatures (-40°C without compromising the rigidity of the composition (K) (see tables 1-3). Thus, by using the proposed invention may receive automotive parts, which can also be used in regions with extreme weather conditions, particularly in regions with extremely cold winters.

As mentioned above, the high density polyethylene (HDPE) is bimodal or multimodal. In particular, high density polyethylene (HDPE) is bimodal or multimodal terms of molecular mass distribution and/or distribution of the content of the co monomer. As will be explained in more detail below, the polypropylene matrix (M-PP) can be unimodal or multimodal, e.g. bimodal effect of molecular mass distribution and/or distribution of the content of the co monomer.

Thus, used in the present application the expression "multimodal" or "bimodal" refers to the modality of the polymer, i.e. the

the shape of the curve of its molecular mass distribution, which is a plot of the fraction with the molecular weight from the molecular weight of this fraction,

and/or

the shape of the distribution curve with the holding of the co monomer, which is a graph showing the dependence of the content of the co monomer from the molecular weight polymer fractions.

As will be explained below, polypropylene matrix (M-PP) and/or polyethylene high density (HDPE) can be obtained by mixing different types of polymers, i.e. polymers with different molecular weight and/or content of the co monomer. However, preferably the polymer components of the polypropylene matrix (M-PP) and/or high density polyethylene (HDPE) get in a multistage process with the use of adjacent reactors operating at different reaction conditions. Each fraction obtained in a particular reactor, will have their own molecular weight distribution and/or distribution of the content of the co monomer.

When applying the curves of distribution of molecular weight or content of the co monomer) for such fractions with obtaining the curve of the molecular mass distribution curve or distribution of the content of the co monomer in the finished polymer, these curves can be two or more maxima or at least a distinct broadening in comparison with the curves for the individual fractions. Such a polymer obtained in two or more successive stages, called bimodal or multimodal, depending on the number the and stages.

In more detail the individual components of the proposed composition (K) will be defined next.

The polypropylene matrix (M-PP) may be a propylene homopolymer (M-Gap) or the propylene copolymer (M-App).

However, preferably polypropylene matrix (M-PP) is a propylene homopolymer (M-Gap).

The expression of the propylene homopolymer used in the present invention, relates to polypropylene, which essentially consists of more than 99.5 wt.%, even more preferably at least more than 99.7 wt.%, for example, at least more than 99.8 wt.% of propylene units. According to a preferred implementation variant of the invention, the propylene homopolymer you can define only propylene units. The content of the co monomer can be determined using infrared spectroscopy with Fourier transform, as described below in the examples.

When the polypropylene matrix (M-PP) is a propylene copolymer (M-App)specified in the propylene copolymer (M-App) contains units derived from at least one of the co monomer selected from the group comprising ethylene and C4-C20α-olefin, preferably at least one of the co monomer selected from the group comprising ethylene and C4-C10α-olefin, such as 1-butene or 1-hexene. Naib is more preferably propylene copolymer (M-COP) is a propylene-ethylene copolymer. The content of the co monomer, for example, the ethylene content in the propylene copolymer (M-App) in this case is preferably relatively low, i.e. up to 5.0 wt.%, more preferably from 0.5 to 5.0 wt.%, even more preferably from 1.0 to 4.5 wt.%, even more preferably from 2.0 to 4.0 wt.%. In particular, ethylene is the only co monomer in propylene copolymer (M-App).

If the polypropylene matrix (M-PP) is a propylene homopolymer (M-Gap), the propylene homopolymer (M-Gap) may be multimodal or bimodal terms of molecular weight. In turn, if the polypropylene matrix (M-PP) is a propylene copolymer (M-App)specified propylene copolymer (M-COP) can be multimodal, e.g. bimodal, from the point of view of the content of the co monomer and/or molecular weight. In particular, it is clear that the propylene copolymer (M-App) is multimodal, e.g. bimodal, from the point of view of the content of the co monomer.

In addition, if the polypropylene matrix (M-PP) is multimodal, e.g. bimodal, in nature, in particular, is multimodal, e.g. bimodal, from the point of view of the content of the co monomer, it is clear that the individual is real faction present in quantities affecting material properties. Accordingly, it is clear that each of these fractions is present at least in an amount of 10 wt.% relative to the weight of the polypropylene matrix (M-PP). Accordingly, in the case of a bimodal system, especially from the point of view of the content of the co monomer, the separation of the two fractions is approximately 50:50. Thus, according to one implementation variant of the invention, the polypropylene matrix (M-PP) contains two fractions which differ in their content of co monomer, for example, the ethylene content, the first fraction is present in an amount of from 40 to 60 wt.%, and the second fraction is present in an amount of from 60 to 40 wt.%.

The difference in the content of the co monomer between the two factions determined way according to a preferred implementation variant of the invention, described in the next paragraph.

When the polypropylene matrix (M-PP) is a propylene copolymer (M-App)specified propylene copolymer (M-App) contains at least two fractions, the content of co monomer which is different. Propylene copolymer (M-App) preferably contains at least two fractions, preferably consists of two fractions, the content of co monomer in which, for example, the ethylene content varies by at least 0.8 wt.%, more before occhialino, varies on at least 1.2 wt.%. On the other hand, the difference in the content of the co monomer in two fractions should not be too high, i.e. not higher than 6.0 wt.%, preferably not higher than 5.0 wt.%, in order to avoid the tendency to separation. Thus, it becomes clear that the propylene copolymer (M-App) contains at least two fractions, preferably consists of two fractions, the content of comonomers which differ by 2.0-6.0 wt.%, more preferably 2.5-5.0 wt.%. Accordingly, according to one implementation variant of the invention, the propylene copolymer (M-App) contains, preferably consists of, from the first fraction, which represents a propylene homopolymer, and a second fraction, which represents a propylene copolymer, the content of co monomer in which, preferably the ethylene content is at least 0.5 wt.%, more preferably at least 1.5 wt.%, for example, at least 2.0 wt.%, for example, at least 2.5 wt.%.

Polypropylene matrix (M-PP) can be obtained at the stage of polymerization performed in one or more polymerization reactors. Preferably the polypropylene matrix (M-PP)containing two or more different propylene polymer can be obtained by carrying out the polymerization in two or more different reactors is imerissia (for example, reactors for block polymerization and/or gas phase reactors; reactors for block polymerization are preferred circulation reactors), thereby resulting in different reactors of the polymerization polymers with different required distributions in molecular weight or monomer composition.

In addition, preferably the polypropylene matrix (M-PP) has a relatively low rate of flow of the melt. The rate of melt flow mainly depends on the average molecular weight. This is due to the fact that long molecules form a material with a lower propensity to yield than short molecules. The increase in molecular weight means a decrease in the PAGE. The rate of melt flow (P) is measured in g/10 min of polymer discharged through a die plate under specified conditions of temperature and pressure and the measurement of the viscosity of the polymer, which, in turn, for each type of polymer is mainly influenced by its molecular weight and degree of branching. The rate of flow of the melt, measured when loading 2.16 kg at 230°C. (ISO 1133) is denoted as P2(230°C). Accordingly, it is preferable in the present invention, P2(230°C.) of the polypropylene matrix (M-PP) is in the range from 0.05 to 250.0 g/10 min, more preferably from .0 to 100.0 g/10 min, even more preferably from 2.0 to 50.0 g/10 minutes

Preferably the polypropylene matrix (M-PP) is isotactic. Accordingly, it is clear that the polypropylene matrix (M-PP) has a rather high pentad concentration, namely higher than 80%, more preferably higher than 85%, even more preferably higher than 90%, even more preferably higher than 92%, even more preferably higher than 93%, for example, higher than 95%.

If the polypropylene matrix (M-PP) is a propylene copolymer (M-App), it is also understood that the units derived from C2-C20α-olefins other than propylene, distributed within the propylene copolymer (M-App) randomly.

The second requirement of the present invention is the presence of at least one elastomeric copolymer (copolymer) (EP), preferably one or two elastomeric copolymers (copolymers) (EP), composition (C) according to the present invention, i.e. in heterophase polypropylene composition (H-PP).

The elastomeric copolymer (copolymer) (EP) contains preferably consists of units derived from ethylene, and at least another C3-C20α-olefin, such as C3-C10α-olefin, more preferably units derived from ethylene and at least another α-olefin, wybranego group, including propylene, 1-butene, 1-penten, 1-hexene, 1-hepten and 1-octene. The elastomeric copolymer (EP) may also contain units derived from non-conjugate diene, however, it is preferable that the elastomeric copolymer comprises units obtained from ethylene and propylene and/or C4-C20α-olefins. Suitable unpaired dieny, in case of their application, include acyclic diene straight or branched chain, 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 dihydromyrcene and dihydroionone, and adnakolava the epicycle diene, such as 1,4-cyclohexadiene, 1, 5cyclooctadiene, 1,5-cyclododecatriene, 4-vinylcyclohexane, 1-allyl-4-isopropylidene cyclohexane, 3-allyl cyclopentene, 4-cyclohexene and 1-Isopropenyl-4-(4-butenyl) cyclohexane. Also are suitable multicolores alicyclic condensed and bridge ring dieny, including tetrahydroindene, methyltetrahydrofuran, Dicyclopentadiene, bicyclo-(2,2,1)-hepta-2,5-diene, 2-methyl-bicycloheptadiene and alkenyl, alkylidene, cycloalkenyl and cycloalkyl norbornene, such as 5-methylene-2-norbornene, 5-isopropylidene norbornene, 5-(4-cyclopentenyl)-2-norbornene; 5-cyclohexylidene-2-norbornene. Preferred non-paired with denami are 5-ethylidene-2-but Barnen, 1,4-hexadiene and Dicyclopentadiene.

Accordingly, the elastomeric copolymer (copolymer) (EP) contain at least the units derived from ethylene and propylene, and may contain other units derived from additional α-olefin, as defined in the previous paragraph. However, it is particularly preferable that the elastomeric copolymer (copolymer) (EP) contains units derived only from ethylene and propylene, and possibly non-conjugate diene defined in the previous paragraph, such as 1,4-hexadiene. Thus, the polymer based on ethylene-propylene non-conjugate diene monomers (EPDM) and/or ethylene-propylene rubber (EPA) as the elastomeric copolymer (copolymer) (EP) is/are particularly preferred, the latter being the most preferred.

Like polypropylene matrix (M-PP), the elastomeric copolymer (copolymer) (EP) can be unimodal or multimodal, e.g. bimodal. However, it is preferable that the elastomeric copolymer (copolymer) (EP) is/are unimodal. As regards the definition of unimodal and multimodal, for example, mymodulename polymer, this definition is given above.

According to a particular implementation variant of the present invention, the proposed composition (K), i.e. heterophase polypropylene composition (H-PP), which contains at least one elastomeric copolymer (EP) and one elastomeric copolymer (EP), while specified elastomeric copolymer (EP) has a higher ethylene content than the elastomeric copolymer (EP), resulting in a lower glass transition temperature elastomeric copolymer (EP) compared to the elastomeric copolymer (EP). Thus, according to the preferred implementation variant of the invention, the glass transition temperature (point) an elastomeric copolymer (EP) above, namely, by at least 5°C higher, namely at 5-10°C higher compared to the elastomeric copolymer (EP). Even more preferred composition (C) according to the present invention, i.e. heterophase polypropylene composition (H-PP), contains only two different elastomeric copolymer (EP), namely, the elastomeric copolymer (EP) and the elastomeric copolymer (EP), but not other elastomeric copolymer (EP).

In cases where the composition (C) according to the present invention, i.e. heterophase polypropylene composition (H-PP), contains (at least) two different elastomeric copolymer (EP), it is clear that the weight ratio between the elastomeric copolymer (EP) and the elastomeric copolymer (EP) ranges from 18:1 to 1:9, more preferably from 9:1 to 1:4.5. Thus, according to a particular implementation variant of the invention, the composition according to the present invention (K), i.e. heterophase polypropylene composition is I (G-PP), contains from 4 to 36 wt.%, preferably, from 5 to 32 wt.%, more preferably, from 6 to 28 wt.%, the elastomeric copolymer (EP) and from 2 to 36 wt.%, preferably, from 3 to 30 wt.%, more preferably, from 4 to 24 wt.%, the elastomeric copolymer (EP).

As for the possible monomer unit constituting the elastomeric copolymer (EP) and the elastomeric copolymer (EP), they correspond to the definitions made for the elastomeric copolymer (EP). The elastomeric copolymer (EP) preferably has a higher total content of co monomer than the elastomeric copolymer (EP), but such total content of co monomer represents the sum of the ethylene content, content With4-C20α-olefin and content of non-conjugate diene.

Accordingly, the elastomeric copolymer (EP) contains, preferably, consists of units derived from propylene and at least another α-olefin selected from the group comprising ethylene and C4-C20α-olefin, such as4-C10α-olefin, more preferably units derived from propylene and at least another α-olefin selected from the group comprising ethylene, 1-butene, 1-penten, 1-hexene, 1-hepten and 1-octene. The elastomeric copolymer (EP) may also contain units derived from non-conjugate diene, however, it is preferable that the elasto Erny copolymer consists of units, obtained only from propylene and ethylene and/or C4-C20α-olefins. As for the possible non-conjugate dienes, in the case of their application, they are given in the list above.

The elastomeric copolymer (EP) preferably contains at least units derived from propylene and ethylene, and may contain other units derived from additional α-olefin, as defined in the previous paragraph. However, particularly preferable that the elastomeric copolymer (EP) contains units derived only from propylene and ethylene and, possibly, non-conjugate diene as defined above, such as 1,4-hexadiene. Thus, the polymer based on ethylene-propylene non-conjugate diene monomer (EPDM) or ethylene-propylene rubber (EPA) are especially preferred as the elastomeric copolymer (EP), the latter being the most preferred.

The content of units derived from propylene elastomeric copolymer (EP) lies in the range from 30.0 to 80.0 wt.%, more preferably, from 40.0 to 75.0 wt.%. Thus, according to a particular implementation variant of the invention, the elastomeric copolymer (EP) contains from 20.0 to 70.0 wt.%, more preferable. 25.0 to 60.0 wt.%, units derived from ethylene. The elastomeric copolymer (EP) preferably is a polymer based on fileproperties non-conjugate diene monomer (EPDM) or ethylene-propylene rubber (EPA), the latter is especially preferred, with the content of propylene, as defined in this paragraph.

The elastomeric copolymer (EP) can be obtained using conventional methods of gas-phase polymerization of α-olefins; however, it is preferable to retrieve it using the catalytic system on the substrate, for example, the catalytic system of the Ziegler-Natta or metallocene catalyst system. For more information about how to obtain the elastomeric copolymer (EP) will be given below.

The elastomeric copolymer (EP) preferably contains units derived from ethylene, at least one C3-C20α-olefin and possibly non-conjugate diene.

More precisely, the elastomeric copolymer (EP) contains, preferably, consists of units derived from ethylene and at least another C3-C20α-olefin, such as C3-C10α-olefin, more preferably units derived from ethylene and at least another α-olefin selected from the group comprising propylene, 1-butene, 1-penten, 1-hexene, 1-hepten and 1-octene. The elastomeric copolymer (EP) may also contain units derived from non-conjugate diene, however, it is preferable that the elastomeric copolymer (EP) consists of units obtained from ethylene and C3-C20α-olefins. With regard to possible nesop agennix dienes, in the case of their application, with regard to possible non-conjugate dienes, in the case of their application, they are given in the list above.

Preferably the elastomeric copolymer (EP) contains at least the units derived from ethylene and propylene, and may contain other units derived from additional α-olefin, as defined in the previous paragraph. However, particularly preferably, when the elastomeric copolymer (EP) contains units derived only from ethylene and propylene, and possibly non-conjugate diene as defined above, such as 1,4-hexadiene. Thus, the polymer based on ethylene-propylene non-conjugate diene monomer (EPDM) or ethylene-propylene rubber (EPA) are especially preferred as the elastomeric copolymer (EP), and the last is the most preferable.

It is clear that the units derived from ethylene, is a major part in the elastomeric copolymer (EP). Accordingly, preferably, when the content of units derived from ethylene, the elastomeric copolymer (EP) is more than 50.0 wt.%, more preferably, ranges from 50.0 to 70.0 wt.%, more preferably, from 51.0 to 60.0 wt.%. Preferably, when the elastomeric copolymer (EP) with ethylene content, as defined in this paragraph is a polymer-based floor is sunpropranolol non-conjugate diene monomer (EPDM) or ethylene-propylene rubber (EPA), the latter is particularly preferred.

In addition, the density of the elastomeric copolymer (EP), measured according to ISO 1183, will preferably not exceed 900 kg/m3more preferably, will be in the range from 850 to 900 kg/m3even more preferably, in the range from 855 to 875 kg/m3.

The elastomeric copolymer (EP) can be obtained using conventional methods of polymerization in solution or methods gas-phase polymerization of α-olefins with the use of a homogeneous or heterogeneous catalysts.

With the above information, it is clear that the proposed composition (K), ie, heterophase polypropylene composition (H-PP), contains

(a) a polypropylene matrix (M-PP) in an amount of from 36 to 81 wt.%, preferably, from 45 to 72 wt.%,

(b) an elastomeric copolymer (copolymer) (AP) in an amount of from 4 to 36 wt.%, preferably, from 5 to 32 wt.%,

(c) an elastomeric copolymer (copolymer) (AP) in an amount of from 2 to 36 wt.%, preferably, from 4 to 24 wt.%,

(d) high density polyethylene (HDPE) in an amount of from 3 to 27 wt.%, preferably, from 6 to 18 wt.%, and

(e) filler (H) in an amount of from 5 to 20 wt.%, more preferably, 8 to 15 wt.%,

relative to the weight of the entire composition (K), more preferably, relative to the total mass of the polypropylene matrix (M-PP), e is Estemirova copolymer (EP), the elastomeric copolymer (EP), high density polyethylene (HDPE) and filler (H),

while the elastomeric copolymer (copolymer) (EP) and the elastomeric copolymer (copolymer) (EP) represent different chemical compounds.

An additional significant aspect of the present invention is that the proposed composition (K), ie, heterophase polypropylene composition (H-PP), contains a specific high-density polyethylene (HDPE).

Under the high-density polyethylene (HDPE) according to this invention involve the polyethylene with a density, measured according to ISO 1183-187 comprising at least 940 kg/m3more preferably lying in the range of 940 to 960 kg/m3for example, from 942 to 955 kg/m3.

The normal varieties of polyethylene know that you can apply them to improve to some extent the dispersion of elastomer components in the polymeric matrix. Although finely dispersed inclusions improve the impact properties of heterogeneous phase system, it is not possible to provide a material with excellent impact strength at very low temperatures such as -40°C. the Main problem of these systems still is that the amorphous phase, in this document, the phase containing elastomeric copolymer (copolymer) (EP), heterophase system, appear the t tendency to crystallization at such low temperatures, which reached the glass transition temperature of the elastomer components. Now unexpectedly been found that this problem can be overcome, if you enter a high-density polyethylene (HDPE), a bimodal or multimodal polyethylene according to its distribution in molecular weight and/or distribution of co monomer.

Accordingly, high-density polyethylene (HDPE) contains at least two fractions with different content of co monomer and/or with different srednevekovoi molecular mass Mw.

Thus, according to a particular implementation variant of the invention, high density polyethylene (HDPE) contains, preferably, consists of a fraction (a) and fraction (B), with the specified fraction (A) has a lower content of co monomer and/or lower srednevekovoy molecular mass Mwmeasured according to ISO 16014 than fraction (B).

Accordingly, the fraction (A) is a polyethylene homopolymer or a polyethylene copolymer, provided that if the fraction (A) is a polyethylene copolymer, the content of co monomer is preferably lower than the content of the co monomer in the faction (In). In turn, the fraction (B) may also be a polyethylene homopolymer or, in the alternative, the polyethylene copolymer, etc the latter is preferred. If the high-density polyethylene (HDPE), i.e. the fraction (a) and/or component (B)contains comonomers, it is clear that such comonomers selected from the group comprising 1-butene, 1-octene, 1-hexene and 4-methyl-pentan.

Thus, the fraction (A) high density polyethylene (HDPE) is preferably defined as follows:

This faction is a polyethylene copolymer with a co monomer, such as 1-butene or 1-hexene, with a content of from 0.5 to 2.5 wt.%, or polyethylene homopolymer, with the latter being preferred. It is also clear that srednevekovaja molecular mass Mwfraction (A), measured according to ISO 16014, lies in the range from 10,000 to 50,000 g/mol, more preferably from 20,000 to 40,000 g/mol. It is also clear that fraction (A) has a higher flow velocity of the melt P2(190°C)measured according to ISO 1133, compared to the fraction (In). Respectively, P2fraction (A) (190°C)measured according IS01133, preferably ranges from 50 to 1000 g/10 min, more preferably from 200 to 800 g/10 min in Addition, the density of fraction (A), measured according to ISO 1183-187, preferably higher density fractions (In). Thus, it is particularly preferred that fraction (A) has a density, measured according to ISO 1183-187, in the range from 950 to 980 kg/m3more preferably, from 955 to 956 kg/m3.

On the other hand, fraction (In) high density polyethylene (HDPE) is preferably defined as follows:

This group is a polyethylene homopolymer or a polyethylene copolymer with a co monomer, such as 1-butene or 1-hexene, with a content of from 1.5 to 4.5 wt.%, the latter is preferred. It is also clear that srednevekovaja molecular mass Mwmeasured according to ISO 16014, fraction (B) is in the range from 75,000 to 500000 g/mol, more preferably from 90000 to 300,000 g/mol. It is also clear that the fraction (B) has the P2(190°C)measured according to ISO 1133, comprising from 0.01 to 1.00 g/10 min, more preferably from 0.04 to 0.08 g/10 min. in Addition, the density of fraction (C)measured according to ISO 1183-187 may vary from 920 to 950 kg/m3more preferably, from 925 to 940 kg/m3.

The weight ratio between component (a) and fraction (B) high density polyethylene (HDPE) is in the range from 70:30 to 30:70, more preferably from 60:40 to 40:60.

In addition, the flow velocity of the melt P2(190°C) high density polyethylene (HDPE), measured according to ISO 1133, lies in the range from 0.1 to 7.0 g/10 min, preferably from 0.5 to 6.0 g/10 min, and/or the ratio of the velocities of the melt CST (P21(190°C)/P (190°C)) lies in the range from 20 to 150, more preferably from 40 to 90.

Srednevekovaja molecular the mass M whigh density polyethylene (HDPE), measured according to ISO 16014, preferably is in the range of 75,000 to 500,000 g/mol, preferably in the range of 90,000 to 300,000 g/mol. The distribution of molecular weight (ratio srednevekovoi molecular mass (Mwto srednetsenovoj molecular mass (Mn)) lies in the range of, preferably, from 5 to 80, more preferably from 8 to 60, for example, from 12 to 45.

The total content of co monomer other than ethylene, high density polyethylene (HDPE) is preferably from 0.2 to 10 wt.%, preferably, from 1.0 to 3.0 wt.%, as measured by infrared spectroscopy with Fourier transform and is defined in the section with examples.

In addition, the melting point of the crystalline high-density polyethylene (HDPE) is preferably 120-140°C, as determined using differential scanning calorimetry (DSC), and the crystallinity ranges from 60 to 90% as determined using DSC.

Finally, the proposed composition (K), ie, heterophase polypropylene composition (H-PP), must contain a filler (H), preferably, the inorganic filler (H). The filler (D) may consist of any filler, if it has a positive effect on the impact properties of the finished product, ie, Ulu who violates impact properties. Accordingly, the filler (D) may preferably be an inorganic filler, in which the upper limit of the distribution of particle size d95 is preferably not more than 100 μm, more preferably not more than 60 μm. The value of "d" represents a diameter of a certain percentage of particles, for example, d95 means that the diameter of 95% of the particles is not more than 100 μm. Typically, the filler (H) has a surface area, measured according to the well-known method of brunauer, Emmett and teller, using gas N2as the adsorbent component is less than 20 m2/g, more preferably less than 15 m2/g, even more preferably less than 10 m2/, According to some versions of the invention, the filler (H) is the surface area of 7 m2/g or less. Fillers (H)satisfying the specified requirements, preferably represent anisotropic mineral fillers such as talc, mica and wollastonite. The most preferred filler is talc.

The proposed composition (K), ie, heterophase polypropylene composition (H-PP), may also contain other additives commonly used in the automotive industry, such as carbon black and other pigments, antioxidants, ultraviolet stabil the congestion, nuclearmoose agents, antistatic additives and additives reduce friction, in amounts commonly used in this technical field.

In addition, according to the present invention has also been found that the proposed composition (K), ie, heterophase polypropylene composition (H-PP), it is possible to obtain a specific way. It was found that to achieve an adequate dispersion of high density polyethylene (HDPE) within the polypropylene matrix (M-PP), especially good results are obtained if the high-density polyethylene (HDPE) are pre-mixed with the elastomeric polymer before adding to the polypropylene matrix (M-PP). Accordingly, the present invention also relates to compositions (MS), i.e. masterbatches containing

(a) at least one elastomeric copolymer (EP), preferably one elastomeric copolymer (EP), such as an elastomeric copolymer (EP)containing units derived from

(i)ethylene,
(ii)at least one C3-C20α-olefin and
(iii)perhaps non-conjugate diene, and

(b) high density polyethylene (HDPE), before the bringing of a bimodal or multimodal polyethylene.

The weight ratio of high density polyethylene (HDPE) and the elastomeric copolymer (EP) is preferably from 60:40 to 20:80, more preferably from 50:50 to 30:70. This attitude ensures that the high-density polyethylene (HDPE) (finely) dispersed within the polypropylene matrix (M-PP).

The term "Royal mixture"used in the present invention, indicates that the composition (MS) contains a higher concentration of elastomeric copolymer (EP) and/or high density polyethylene (HDPE)than in the proposed composition (K), ie, heterophase polypropylene composition (H-PP).

Composition (MS), ie, uterine mixture may contain conventional additives and possibly filler (H) in the concentrations used to obtain the proposed composition (K), i.e. to obtain heterophase polypropylene composition (H-PP). Typically, the composition (MS), ie, uterine mixture contains as polymer components only the elastomeric copolymer (EP) and high density polyethylene (HDPE). Thus, it is clear that the elastomeric copolymer (EP) and high density polyethylene (HDPE) together constitute at least 85 wt.%, more preferably, at least 90 wt.% relative to the weight of the composition (MS), i.e. masterbatches.

The elastomeric copolymer (EP) preferably is an elastomer is polymer (AP), defined above. With regard to the preferred options for the realization of high density polyethylene (HDPE), their definition is given above.

To obtain the proposed composition (K), ie, heterophase polypropylene composition (H-PP), composition (MS), i.e, Royal blend, mix, namely, mixed in the melt or by a method of injection molding, with heterophase polypropylene (G-FG1), containing

(a) a polypropylene matrix (M-PP), and

(b) at least one elastomeric copolymer (EP), preferably one elastomeric copolymer (EP), such as an elastomeric copolymer (EP)containing units derived from

(i) ethylene,

(ii) at least one C3-C20α-olefin, and

(iii) may be non-conjugate diene.

The filler (H), you can either pre-mix composition (MS), ie, uterine mixture, or added separately at the time of receipt of the heterophase polypropylene (G-PP).

Accordingly, the composition (K), ie, heterophase polypropylene composition (H-PP)receive, in particular, by mixing, i.e. by mixing in the melt or by injection molding,

(a) heterophase polypropylene (G-FG1) in an amount of from 40 to 90 wt.%, preferably, from 50 to 80 wt.%,;

(b) composition (MS) in an amount of from 5 to 45 wt.%, preferably, from 10 to 30 mass; and

(c) filler (H) to which icesto from 5 to 20 wt.%, preferably, from 8 to 15 wt.%,.

The elastomeric copolymer (EP) heterophase polypropylene (G-FG1) preferably is an elastomeric copolymer (EP)defined above. The polypropylene matrix (M-PP) heterophase polypropylene (G-FG1) represents the same polypropylene matrix (M-PP), defined for the proposed composition (K), i.e. for heterophase polypropylene composition (H-PP).

It was found that the mixing of compositions (MS), i.e. masterbatches, with heterophase polypropylene leads to a much better final properties of the composition (K), ie, heterophase polypropylene composition (H-PP), compared with the mixing of compositions (MS), i.e. masterbatches, with polypropylene homopolymer or propylene copolymer or compared with the mixing of pure high density polyethylene (HDPE) with heterophase polypropylene (G-FG1).

Heterophase polypropylene (G-FG1)used for mixing with the composition (MS), ie, uterine mixture, preferably represents the following polymer:

Heterobasidiomycetes (G-FG1), containing

(a) a polypropylene matrix (M-PP), and

(b) an elastomeric copolymer (EP), preferably, the elastomeric copolymer (EP), dispersed in said matrix (M-PP), with the specified elastomeric copolymer (the P), preferably, the specified elastomeric copolymer (EP)contains units derived from

(i) propylene,

(ii) ethylene and/or at least one C4-C20α-olefin and

(iii) may be non-conjugate diene,

when this weight ratio of the polypropylene matrix (M-PP) and the elastomeric copolymer (EP) is from 60:40 to 90:10, preferably from 70:30 to 85:15.

Accordingly, heterophase polypropylene (G-FG1) according to the present invention is a homogeneous mixture of the polypropylene matrix (M-PP), specific detail above in the description of the proposed composition (K), ie, heterophase polypropylene composition (H-PP), and amorphous phase dispersed century matrix. Uniform mixing can be achieved by mixing in the melt, however, preferably, when heterophase polypropylene (G-FG1) is a reactor blend. Such reactor mixture is preferably obtained by carrying out at least two-stage process, which allows you to get a multiphase structure with a polypropylene matrix (M-PP) and inclusions in it, containing elastomeric copolymer (EP) as part of the amorphous phase. The exact way to obtain this heterophase polypropylene (G-FG1) are described in detail below. Thus, heterophase polypropylene (G-FG1) according to the present from which briteney contains polypropylene matrix (M-PP) and the elastomeric copolymer (EP), (finely) dispersed in said matrix, preferably in the form of inclusions. The elastomeric copolymer (EP) preferably represents a major part of the amorphous phase, i.e. amorphous inclusions. Heterophase polypropylene (G-FG1) may optionally contain up to some extent (crystalline) polymer other than polypropylene, such as (crystalline) polyethylene and/or other (crystalline) C4-C20α-olefin polymers. The number of (crystalline) polymer, such as polyethylene, part of the dispersed phase is preferably from 0 to 10 wt.%, more preferably, from 2 to 8 wt.%, relative to the total weight of the heterophase polypropylene (G-FG1).

An additional characteristic of the elastomeric copolymer (EP), not mentioned in the definition proposed composition (K), ie, heterophase polypropylene composition (H-PP), is its characteristic viscosity is related to molecular weight and, thus, the melt viscosity of the specified component. The elastomeric copolymer (EP) prevails over soluble in cold xylene fraction (RHC) heterophase polypropylene (G-FG1). Accordingly, the characteristic viscosity of the elastomeric copolymer (EP) due to the characteristic viscosity soluble cold xylene fraction (RHC) just waterof the importance of polypropylene (G-FG1). Thus, preferably, when the characteristic viscosity soluble in cold xylene fraction (IV RHC) heterophase polypropylene (G-FG1) is equal to or lower than 4.0 DL/g According to a preferred implementation variant of the invention, the characteristic viscosity is in the range from 1.0 to 6.0 DL/g, even more preferably in the range from 1.5 to 4.5 DL/g Characteristic viscosity is measured according to ISO 1628 in decaline at 135°C.

In addition, preferably, when heterophase polypropylene (G-FG1), more precisely, the polypropylene matrix (M-PP) and the elastomeric copolymer (EP)contains units derived from C2-C20α-olefins other than propylene, preferably derived from ethylene is more than 7.0 wt.%, more preferably is more than 10.0 wt.%, even more preferably, is more than 12.0 wt.%. Accordingly, it is preferable that the heterophase polypropylene (G-FG1) contains units derived from C2-C20α-olefins other than propylene, preferably derived from ethylene is in the range from 7 to 30 wt.%, preferably, in the range from 10 to 25 wt.%.

Moreover, it is clear that P2(230°C) heterophase polypropylene (G-FG1) is in the range from 1.0 to 30.0 g/10 min, more preferably from 2.0 to 20.0 g/10 min, even more preferably, from 2. to 12.0 g/10 minutes

Soluble in cold xylene fraction (RHC) heterophase polypropylene (G-FG1) can be quite high, i.e. up to 40 wt.%. Accordingly, according to the preferred implementation variant of the invention, soluble in cold xylene fraction (RHC) heterophase polypropylene (G-FG1) is preferably in the range from 5 to 40 wt.%, for example, from 7 to 30 wt.%.

Thus, in a rather private process, the proposed composition (K), ie, heterophase polypropylene composition (H-PP), are produced by performing the following steps

(1.1) polymerization of propylene and possibly additional co monomer (comonomers), as defined above, preferably ethylene, at least one reactor, preferably, in one or more reactor (reactors) for block polymerization, preferably, the circulation reactor and/or in one or more gas phase reactor (reactors), these reactors are usually connected in series, to obtain the propylene copolymer (M-PP),

(1.2) the transfer of a specified propylene copolymer (M-PP) in the secondary reactor, preferably a gas phase reactor,

(1.3) to obtain the elastomeric copolymer (EP) by the polymerization of propylene and additional co monomer (comonomers), as defined above, preferably ethylene, in presets is of a specified propylene copolymer (M-PP) to obtain the elastomeric copolymer (EP), dispersed in a specified propylene polymer (M-PP), i.e, for heterophase polypropylene (G-FG1),

(1.4) remove the specified heterophase polypropylene (G-FG1) from the reactor and transfer to a mixing device, preferably in an extruder or in a device for injection moulding,

(2. either add to the specified heterophase polypropylene (G-FG1) through a mixing device, i.e. through the extruder, or through the device for injection molding, the composition (MS), i.e. masterbatches, with the specified composition (MS) contains a filler (H),

(2. b) either add to the specified heterophase polypropylene (G-FG1) through a mixing device, i.e. through the extruder or through the device for injection molding, the composition (MS), i.e. masterbatches, filler (H) separately, preferably, separately through different lines, pipelines,

(3) mixing the components in the device, i.e. in the extruder or in the device for injection moulding and unloading received proposed composition (K), ie, heterophase polypropylene composition (H-PP),

All reactors at the stages of (1.1)-(1.3) is preferably connected in series.

The polymerization can be done in the presence of a metallocene catalyst or a catalyst of Ziegler-Natta, the latter is the particularly preferred.

The catalyst of the Ziegler-Natta, usually used in the present invention for polymerization of propylene, is a stereospecific catalyst of Ziegler-Natta high yield, containing as mandatory components of Mg, Ti, Al and Cl. Catalysts of this type, in addition to the solid component of the transition metal (such as Ti), typically contain socialization (socializaton), as well as external donor (donors) as stereoregulating agent.

These connections can be located on a granular substrate, such as an inorganic oxide, such as silicon dioxide or aluminum oxide, or, as a rule, the solid substrate can be made of the magnesium halide. It is also possible that solid catalysts themselves play the role of the substrate, i.e, the catalysts are not placed on the external substrate, and get way solidification of the emulsion.

A solid component of the transition metal is typically also contains electron donor (internal electron donor). Suitable internal electron donors are, inter alia, esters of carboxylic acids, such as phthalates, citraconate and succinate. You can also use oxygen - or nitrogen-containing silicon compounds.

Acetalization used in combination with the compound of the transition metal usually contains the connection alkylamine. Soy is inania alkylamine preferably represents trialkylaluminium, such as trimethylaluminum, triethylaluminum, three-isobutylamine or tri-n-octylamine. However, this connection may also be a halide alkylamine, such as chloride diethylamine, chloride dimethylamine and half-chloride ethylaluminum.

The catalyst also preferably contains an external electron donor. Suitable electron donors, known in the art, include esters, ketones, amines, alcohols, phenols, phosphines, and silanes. External donor type silanes are typically organosilane connections, including connection Si-OCOR, Si-or, Si-NR2containing silicon as the Central atom, while R represents alkyl, alkenyl, aryl, arylalkyl or cycloalkyl with 1-20 carbon atoms, and is known in this technical field.

Examples of suitable catalysts and compounds in catalysts described inter alia in WO 87/07620, WO 92/21705, WO 93/11165, WO 93/11166, WO 93/19100, WO 97/36939, WO 98/12234, WO 99/33842, WO 03/000756, WO 03/000757, WO 03/000754, WO 03/000755, WO 2004/029112, WO 92/19659, WO 92/19653, WO 92/19658, US 4382019, US 4435550, US 4465782, US 4473660, US 4560671, US 5539067, US5618771, EP45975, EP45976, EP45977, WO 95/32994, US 4107414, US 4186107, US 4226963, US 4347160, US 4472524, US 4522930, US 4530912, US 4532313, US 4657882, US 4581342, US 4657882.

In the present invention, it is preferable to use a catalyst of the Ziegler-Natta, for example, titanovyi catalyst on a substrate of inorganic halide (e.g., MgCl 2or on solid catalysts of the Ziegler-Natta on its own substrate, together with socialization alkylamines (for example, triethylaluminium). Silanes, for example, dicyclopentadienyliron (DCPDS) or cyclohexanedimethanol (ZGMDS), as a rule, can be used as external donors. The catalyst in the second stage polymerization is usually the same as the catalyst used in the first stage polymerization.

According to a preferred implementation variant of the invention, heterophase polypropylene (G-FG1) get in the reactor system containing at least one reaction zone for block polymerization, comprising at least one reactor for block polymerization, and at least one gas-phase reaction zone comprising at least one gas-phase reactor. The polymerization of the propylene copolymer (M-PP), i.e, matrix heterophase polypropylene (G-FG1), preferably performed in a circulation reactor and at least one gas-phase reactor, i.e. in one or two gas-phase reactor (reactors).

As a modifier or regulator molar mass can be applied hydrogen in varying amounts in any or all of the reactor into a first polymerization of the propylene copolymer (M-PP)) and second (polymerization elastomeric copolym the RA (EP)) stages of polymerization.

Phase separation can be performed between the reaction zones to prevent entrainment of reactant from the first stage polymerization in the second stage.

In addition to the applicable operating reactors of the polymerization system for carrying out the polymerization reaction may also include a number of additional reactors, such as advanced reactors. Preliminary reactors include any reactor for pre-activation and/or pre-polymerization catalyst with propylene and/or another α-olefin (olefin)such as ethylene, if necessary. All the reactors in the reactor system is preferably arranged in series.

High-density polyethylene (HDPE), as it is defined in the present invention, can be obtained by mixing two or more modal polyethylenes with different maxima centered their distribution of molecular masses or with different content of co monomer.

Alternatively, and preferably, high density polyethylene (HDPE) can be obtained by polymerization using conditions that allow you to create a bimodal or multimodal polymer product using, for example, the catalytic system or a mixture of two or more different catalytic sites, when using two or blastogenic polymerization processes with different process conditions at various stages (for example, different temperatures, pressures, curing environments, the partial pressure of the hydrogen content of the co monomer and the like).

Such high-density polyethylene (HDPE) can be obtained relatively simply by using a multistage polymerization of ethylene, for example, using a series of reactors, adding the co monomer only in the reactor (reactors)used for obtaining the component (components) with high/very high molecular masses. Examples of obtaining high-density polyethylene (HDPE) are described in EP 0778289 and W0 92/12182.

If the component is ethylene homopolymer obtained by suspension polymerization, including the use of recycled diluent, the diluent may contain as pollutants of a small number of higher α-olefins. Also, when at an earlier stage of polymerization get component ethylene copolymer, a small amount of co monomer can be transferred to the stage of homopolymerization ethylene.

Accordingly, in this application under ethylene homopolymers mean a polymer containing at least 99.9% by weight of ethylene units. Also as in the case of multistage/megaregional polymerization using more than one catalyst system, the catalyst for homopolymerization can be at IU the e partially active during the copolymerization reaction, thus any component copolymer comprising less than 5 wt.% relative to the total weight of the polymer should not be regarded as a component with the lowest molecular weight of the high density polyethylene (HDPE) in accordance with the present invention.

The polymerization reaction used to obtain high-density polyethylene (HDPE) may include commonly used reaction homopolymerization or copolymerization of ethylene, for example, gas-phase, slurry, liquid-phase polymerization carried out with conventional reactors, for example, circulation reactors, gas phase reactors, reactors periodic operation and the like (see, for example, W0 97/44371 and W0 96/18662). Used catalytic system can also be any conventional system, for example, chromium catalysts, the catalysts of the Ziegler-Natta and metallocene catalysts: alumoxane catalysts, or a homogeneous or, more preferably, heterogeneous catalysts, for example catalysts on a substrate of inorganic or organic particles, in particular, magnesium halides or inorganic oxides, such as silica, alumina or silica-alumina. To obtain high molecular weight component, in particular, it is preferable to use catalysts Zip the RA-Natta on the substrate, as in this case, you can easily adjust the molecular weight with hydrogen. You can also apply metallocene catalysts on the substrate, which makes it easy to choose the desired molecular weight by a suitable choice of a particular metallocenes. Applied metallocene, as a rule, will represent the group of metals of the IVa-VIa (in particular Zr or Hf), forming complexes with possibly substituted cyclopentadienyls groups, for example, groups containing terminal or condensed deputies, possibly linked together via bridging groups. Suitable metallocene and alumoxane socializaton described in detail in the literature, for example, in the publications of patent applications Borealis, Hoechst, Exxon, etc.

However, typically and preferably, high density polyethylene (HDPE) is obtained by applying the multi-stage polymerization using the same catalyst system or a variety of catalytic systems, for example, two or more metallocenes, one or more metallocenes and one or more catalysts of the Ziegler-Natta, two or more chromium catalysts, one or more of chromium catalysts and one or more catalysts of the Ziegler-Natta, etc. In particular, the same catalytic system is preferably used at various stages polymerizes and, for example, the catalytic system described in EP 0688794.

The elastomeric copolymer (EP) can produce or synthesize, using a variety of methods. For example, these copolymers can be synthesized using the polymerization in solution, suspension or gas phase, using different catalytic systems, including systems of the Ziegler-Natta, including vanadium catalysts, and occur in different phases, such as solution, suspension or gas phase. Typical catalysts include catalysts with a single center of polymerization on the metal, including catalysts with hard geometry and metallocene group IV-VI and catalysts of Brookhart. Elastomeric copolymers are commercially available under the trademarks Vistalon, for example, Vistalon 606, ExxonMobil, USA), Keltan (DSM Elastomers, the Netherlands), Nordel (Dow Chemical, USA), NORDEL MG. (Dow Chemical, USA), Royalene, such as Royalene 501, (Lion Copolymer LLC, USA), Buna EP (Lanxess AG, Germany) and Dutral (Polimeri Europa, Italy).

You can add the regular amount of auxiliary substances, not counting the filler (H), the number of which can vary for stabilizers from 0.01 to 2.5 wt.%, for technological additives from 0.01 to 1 wt.%, for antistatic additives from 0.1 to 1 wt.% and for pigments from 0.2 to 3 mass., in each case relative to the total weight of the proposed composition (K).

Then, the finished composition is Yu (K), i.e. specified heterophase polypropylene composition (H-PP), (preferably, in the form of tablets) is preferably used to create products, for example, products obtained by way of injection molding. Thus, the finished composition (K), i.e. specified heterophase polypropylene composition (H-PP), (preferably, in the form of tablets) is used, in particular, for the manufacture of automotive parts, as bumpers, parts of the side trim, accessories transmission, body panels, spoilers, dashboards, interior details, etc.

The present invention also relates to the use of high density polyethylene (HDPE) or composition (MS), i.e. masterbatches defined in the present invention, to improve the strength at low temperatures, for example, expressed with the help of impact strength, measured according to ISO 179, heterophase polypropylene, preferably, heterophase polypropylene (G-FG1)defined in the present invention, at such low temperatures, such as temperatures below -20°C, preferably below -30°C, for example, at -40°C.

Thus, the present invention applies in particular to the use of high density polyethylene (HDPE) or composition (MS), i.e. masterbatches, to improve toughness heterophase polypropylene, such catheterizing polypropylene (G-FG1), when this improvement is determined using

1.2<[(AN+MV)/AN],

more preferably 1.3<[(AN+MV)/AN],

for example, 1.4<[(AN+MV)/AN],

where

AN+MV represents the impact strength, measured according to ISO 294-1 at -40°C, heterophase polypropylene, such as heterophase polypropylene (G-FG1), with which mix high-density polyethylene (HDPE) or composition (MS), ie, uterine mixture, and

FAILURE is an impact strength measured according to ISO 294-1 at -40°C, the same heterophase polypropylene, for example, heterophase polypropylene (G-FG1)as used in opposition to,+MV, but without the addition of high density polyethylene (HDPE) or composition (MS), i.e. masterbatches.

Given the above information, the present invention applies in particular to the following variants of the invention:

[Paragraph 1] the Composition (C)containing

(a) a polypropylene matrix (M-PP),

(b) at least one elastomeric copolymer (EP)containing units derived from

(i) ethylene,

(ii) at least one C3-C20α-olefin and

(iii) may be non-conjugate diene;

(c)high density polyethylene (HDPE), a bimodal or multimodal polyethylene, and

(d) inorganic filler (H).

[Paragraph 2] the Composition (C) according to [PA is the agraffe 1], characterized in that

(a) an elastomeric copolymer (copolymer) (EP), high density polyethylene (HDPE) and the filler (H) dispersed in a specified polypropylene matrix (M-PP) and/or

(b) soluble in xylene (CR) components of the composition (K) is at least 12 wt.% relative to the weight of the entire composition (K).

[Paragraph 3] the Composition (C) according to [Paragraph 1 or 2], characterized in that the composition (C) contains

(a) a polypropylene matrix (M-PP) in an amount of from 36 to 81 wt.%,

(b) an elastomeric copolymer (copolymer) (EP) in an amount of from 6 to 72 wt.%,

(c) high density polyethylene (HDPE) in an amount of from 3 to 27 wt.% and

(d) inorganic filler (H) in an amount of from 5 to 20 wt.%.

[Para 4] the Composition (C) according to any of the preceding [Paragraphs 1-3], characterized in that the composition (C) contains an elastomeric copolymer (EP) and the elastomeric copolymer (EP),

(a) the ethylene content in the specified elastomeric copolymer (EP) higher than in the elastomeric copolymer (EP), and

(b) the specified elastomeric copolymer (EP) is present in the composition (a) in a quantity of from 4 to 36 wt.%, and the specified elastomeric copolymer (EP) is present in the composition (a) in a quantity from 2 to 36 wt.%.

[Para 5] the Composition (C) according to any of the preceding [Paragraphs 1-4], characterized in that

(a) if estvo links, derived from ethylene, the elastomeric copolymer (EP) is in the range from 20 to 70 wt.%, and/or

(b) the number of units derived from ethylene, the elastomeric copolymer (EP) is more than 50 wt.%.

[Para 6] the Composition (C) according to any of the preceding [Paragraphs 1-5], wherein the weight ratio of high density polyethylene (HDPE) and the amount of elastomeric copolymer (EP) is from 1:10 to 2:1.

[Para 7] the Composition (C) according to any of the preceding [Paragraphs 1 to 6], characterized in that

(a) a polypropylene matrix (M-PP) is a propylene homopolymer and/or

(b) an elastomeric copolymer (copolymer) (EP) are ethylene-propylene rubber (EPA) and/or polymer-based etilenpropilendienovogo monomer (EPDM).

[Para 8] the Composition (C) according to any of the preceding [Paragraphs 1 to 7], wherein the high density polyethylene (HDPE)

(a) has a flow velocity of the melt P2(190°C)measured according to ISO 1133, comprising from 0.1 to 7.0 g/10 min, and/or

(b) has a ratio of velocities of the melt CST (P21(190°C)/P (190°C), of from 20 to 150 and/or

(c) contains a fraction (a) and fraction (B)

(i) the fraction (A) has a lower srednevekovoy molecular mass Mwmeasured according to ISO 16014, and/or more low the second flow rate of the melt P 2(190°C)measured according to ISO 1133 than the specified fraction () and

(ii) the weight ratio between component (a) and fraction (B) is in the range from 70:30 to 30:70.

[Paragraph 9] the Composition (C) according to any of the preceding [Paragraphs 1 to 8], characterized in that

(a) the fraction (A) has

(i) srednevekovoy molecular mass Mwmeasured according to ISO 16014, component from 10000 to 50000 g/mol, and/or

(ii) the rate of flow of the melt P2(190°C)measured according to ISO 1133, comprising from 50 to 1000 g/10 min, and/or

(iii) the density measured according to ISO 1183-187, component from 950 to 980 kg/m3,

and

(b) the fraction (B) has

(i) srednevekovoy molecular mass Mwmeasured according to ISO 16014, component from 75,000 to 500000 g/mol, and/or

(ii) the rate of flow of the melt P2(190°C)measured according to ISO 1133, comprising from 0.01 to 1.00 g/10 min, and/or

(iii) the density measured according to ISO 1183-187, component from 920 to 950 kg/m3.

[Para 10] the Composition (MS), including

(a) an elastomeric copolymer (EP)containing units derived from

(i) ethylene,

(ii) at least one C3-C20α-olefin and

(iii) may be non-conjugate diene;

and

(b) high density polyethylene (HDPE), a bimodal or multimodal polyethylene,

while ELAS is omery copolymer (EP) and high density polyethylene (HDPE) together constitute at least 85 wt.% composition (MS).

[Para 11] the Composition (MS) according to [Paragraph 10], wherein the elastomeric copolymer (EP) is an elastomeric copolymer (EP)defined in any one of the preceding [Paragraphs 1-9], and high density polyethylene (HDPE) is also defined in any one of the preceding [Paragraphs 1-9].

[Para 12] the Composition (MS) according to [Paragraph 10 or 11], wherein the weight ratio of high density polyethylene (HDPE) and the elastomeric copolymer is from 60:40 to 90:10.

[Para 13] the Use of a composition (MS) according to any of the preceding [Paragraphs 10 to 12] to improve the impact toughness of the heterophase polypropylene, with improvement defined as

1.2<[(AN+MV)/FAILURE]

where

AN+MV represents the impact strength, measured according to ISO 294-1 at -40°C, heterophase polypropylene, which is mixed composition (MS), defined in any of the preceding [Paragraphs 10 to 12], and

FAILURE is an impact strength measured according to ISO 294-1 at -40°C, the same heterophase polypropylene, as used in opposition to,+MV, but without adding songs (MS), defined in any of the preceding [Paragraphs 10 to 12].

[Para 14] the production method of the composition (K), defined in any of the previous claims 1 to 9, characterized in that

(a) heterophase polypropylene (G-PP), including

(i) a polypropylene matrix (M-PP)as defined in any of Paragraphs 1-9]

(ii) an elastomeric copolymer (EP), preferably, the elastomeric copolymer (EP)defined in any of Paragraphs 1-9] and dispersed in said matrix (M-PP);

(b) composition (MS), defined in any of Paragraphs 10 to 12]; and

(c) inorganic filler (H)

mixed together, preferably in the melt.

[Para 15] the Method according to [Paragraph 14], characterized in that

(a) heterophase polypropylene (G-PP) in an amount of from 40 to 90 wt.%;

(b) composition (MS) in an amount of from 5 to 45 wt.%; and

(c) inorganic filler (H) in an amount of from 5 to 20 wt.% mixed together, preferably in the melt.

[Para 16] the Product, preferably a product obtained by the method of injection molding containing composition (C) according to any of the preceding [Paragraphs 1-9].

Hereinafter the present invention will be further described in detail with examples below.

EXAMPLES

1. Definition/how to measure

The following definitions and methods of determination used in the above General description of the invention, as well as in the following examples, unless otherwise indicated.

Quantitative determination of isotacticity in polypropylene using13With NMR spectroscopy

Isota lichnosti determined using quantitative spectroscopy nuclear magnetic resonance (NMR) 13With after the main attribution of the peaks, such as: V.Busico and R.Cipullo, Progress in Polymer Science, 2001, 26, 443-533. Experimental parameters adjust thus to provide a quantitative measurement of the spectra for this particular task, as described, for example, in: S. Berger and S. Braun, 200 and More NMR Experiments: A Practical Course, 2004, Wiley-VCH, Weinheim. The number calculated by applying the simple adjusted relations of the integrals of the signals representative plots method known in this technical field.

Isotacticity determined at the level of the pentad, ie, mmmm fraction distribution of the pentad.

The density is measured according to ISO 1183-187. Sample preparation is carried out by molding under pressure according to ISO 1872-2:2007.

Srednecenovogo molecular mass (Mn), srednevekovoy molecular mass (Mw) and the distribution of molecular mass (MWD) was determined by exclusion chromatography (EH), applying the device Waters Alliance GPCV2000 online viscometer. The oven temperature is 140°C. the solvent used trichlorobenzene (ISO 16014).

P2(230°C) measured according to ISO 1133 (230°C., load 2.16 kg).

P2(190°C) measured according to ISO 1133 (190°C, load 2.16 kg).

P21(190°C) measured according to ISO 1133 (190°C, download 21.6 kg).

The ratio of the flow rate of the melt CST is defined as the ratio of the P21190°C)/P(190°C)

Quantitative determination of co monomer with the use of infrared spectroscopy with Fourier transform

The content of the co monomer determined using quantitative infrared spectroscopy with Fourier transform (PF-IR) after the main assignment of the peaks in the calibration with the use of quantitative spectroscopy nuclear magnetic resonance (NMR)13With the method, well known in the art. A thin film pressed to a thickness of about 100-500 microns and record spectra in transmission mode.

In particular, the content of ethylene in the copolymer, polypropylene-co-ethylene determined on the basis of the peak area, the adjusted relative to the baseline quantitative bands found at 720-722 and 730-733 cm-1. Quantitative results are obtained on the basis of the standard relative to the film thickness. Characteristic viscosity measured according to DIN ISO 1628/1, October 1999 (in decaline at 135°C).

The modulus of elasticity in bending: modulus of elasticity Flexural strength was determined in three-point bending according to ISO 178 on the samples obtained by the method of injection molding of specimens 80×10×4 mm, prepared in accordance with ISO 294-1:1996. The coefficient of linear thermal expansion: the Coefficient of linear thermal expansion (cltr) was determined in accordance with ISO 11359-2:1999 using a 10 mm parts, cut off from those W the samples, obtained by the injection molding method, which was used to determine the modulus of elasticity in bending. The measurement was performed in the temperature range from +23 to +80°C with a heating rate of 1°C/min

Test impact strength Charpy: the Impact strength of the sample cut by Sharpie (Charpy NIS) measured according to ISO 179 2C/DIN 53453 at 23°C, -20°C and -40°C, using test samples in the form of a block obtained by way of injection molding, 50×6×4 mm3prepared in accordance with ISO 294-1:1996.

The crystallization temperature TC

The crystallization temperature was measured by the method of differential scanning calorimetry (DSC) according to ISO 11357-1,2,3 when the cooling rate 10 K/min after the first heating up to 200°C.

The melting temperature Tm

The melting temperature (maximum temperature) Tm was measured using the DSC according to ISO 11357-1,2,3 applying the maximum temperature in the second heating cycle heating-cooling-heating at a rate of 10 K/min in the range between ambient temperature and 210°C.

The glass transition point: the glass transition Point was measured using dynamometrical analysis according to ISO 6721-7 using disks obtained by the method of molding under pressure, of a thickness of 1 mm, manufactured in accordance with ISO 1877-2:2007.

The components soluble in xylene (RHK, mass.%): The content of components, p is storymy in xylene (RHC), determined at 23°C according to ISO 6427.

The particle size d95 calculated on the basis of the distribution of particle sizes, determined by laser diffraction according to ISO 13320-1:1999.

The surface area is defined as the surface of brunauer, Emmett and teller according to ISO 787-11 with application of nitrogen (N2).

2. Examples

G-FG1 is a commercial product KSR4542 from Borealis and is a heterophase polypropylene with P2(230°C) 7 g/10 min, a density of 905 kg/m3content of components soluble in xylene, 25 wt.%, the characteristic viscosity of CU-faction 2.8 DL/g; matrix heterophase polypropylene is a propylene homopolymer and a glass transition point of elastomeric phase is -48°C.

EPA-MV is a commercial product Dutral 06 PM from Polimeri Europa and is a uterine mixture containing 34 wt.% unimodal polyethylene and 66 wt.% ethylene-propylene rubber (ethylene content of 60 wt.%, while specified uterine mixture has P2(230°C) 1.8 g/10 min and a density of 940 kg/m3the point of vitrification component EPA is -56°C,

APK is a commercial product Vistalon 606 from ExxonMobil and is an ethylene-propylene rubber containing ethylene 54 wt.%, the density of 865 kg/m3and the point of vitrification -55°C

EPDM is the tsya commercial product Royalene 501 from Lion Copolymer LLC and is a polymer-based etilenpropilendienovogo monomer (EPDM), with an ethylene content of 57 wt.%, the content of diene 3.8 wt.%, the density of 860 kg/m3and the point of vitrification -58°C,

PMP is a commercial product MW from Borealis and is a bimodal high density polyethylene with P2(190°C) 1.5 g/10 min, P21(190°C) 97 g/10 min, a density of 951 kg/m3,

PMP is a commercial product FB1460 from Borealis and is a bimodal high density polyethylene with P2(190°C) 0.2 g/10 min, P21(190°C) 6.0 g/10 min, a density of 946 kg/m3,

MV1 represents mixed in the extruder a mixture of 65 wt.% APK and 35 wt.% PMP

MD2 is a mixed in the extruder a mixture of 65 wt.% APK and 35 wt.% PMP

MW represents mixed in the extruder a mixture of 65 wt.% EPDM and 35 wt.% PMP

SV is a commercial product Plasblak RE from Cabot Corp and is a Royal blend of polyethylene with the content of technical carbon 30 wt.% and P2(190°C) 8 g/10 min,

The filler is a commercial product Luzenac A20 from the company Luzenac and is a talc with a distribution of particle size d95 of 20 μm and a specific surface area of 6.5 m2/year

Table 1
Properties p is Kerov comparison
CE 1CE 2CE 3CE 4
G-FG1[wt.%]786358100
EPA-MS[wt.%]101520-
SV[wt.%]222-
Filler[wt.%]202020-
P2(230°C)[g/10 min]4.94.24.07
Impact strength at 23°CkJ/m228.331.032.4 28
Impact strength at -20°CkJ/m210.713.724.47
Impact strength at -40°CkJ/m25.98.08.15.5
The modulus of elasticity in bendingMPa11821063939860
Clcrµm/m·K78.073.264.7102.5

78
Table 2
Properties of examples according to the present invention
E 1E 2E 3E 4E 5
G-FG1[wt.%]63587863
MS[wt.%]101520
MC2[wt.%]1015
SV[wt.%]22222
Filler[wt.%]2020202020
P2(230°C)[g/10 min]4.94.33.64.43.6
Impact strength at 23°CkJ/m231.631.630.731.3
Impact strength at -20°CkJ/m27.618.327.58.320.3
Impact strength at -40°CkJ/m25.96.412.46.06.1
The modulus of elasticity in bendingMPa111010869211140974
Clcrµm/m·K78.884.574.979.578.2

Table 3
Properties of examples according to the present invention
E 6E 7E. 8E 9
G-FG1[wt.%]58786358
MC2[wt.%]20
MS[wt.%]101520
SV[wt.%]2222
Filler[wt.%]20202020
P2(230°C)[g/10 min]3.27.05.55.4
Impact strength at 23°C kJ/m230.224.527.228.9
Impact strength at -20°CkJ/m233.26.210.432.8
Impact strength at -40°CkJ/m217.44.44.89.8
The modulus of elasticity in bendingMPa9031146967724
Clcrµm/m·K86.987.178.476.9

1. Heterophase propylene composition for the manufacture of products obtained by the method of injection molding, comprising:
polypropylene matrix in the amount of at least 36 wt.%
elastomeric copolymer (copolymer) in an amount of at least 6 wt.%, contains links
(i) ethylene,
(ii) at least one C3-C20the-olefin and
(iii) may be non-conjugate diene;
- high density polyethylene in an amount of from 6 to 27 wt.%, representing a bimodal or multimodal polyethylene and
- the inorganic filler in the amount of at least 5 wt.%.

2. The composition according to claim 1, characterized in that
elastomeric copolymers (copolymers), high density polyethylene, and an inorganic filler dispersed in the specified polypropylene matrix and/or
soluble in xylene components of the composition are at least 12 wt.% by weight of the entire composition.

3. Composition according to claims 1 and 2, characterized in that the composition contains:
polypropylene matrix in the amount of from 36 to 81 wt.%
elastomeric copolymer (copolymer) in an amount of from 6 to 72 wt.%
- high density polyethylene in an amount of from 7 to 27 wt.% and
- inorganic filler in an amount of 5 to 20 wt.%.

4. Composition according to claims 1 and 2, characterized in that the composition contains an elastomeric copolymer (EP) and the elastomeric copolymer (EP),
the ethylene content in the specified elastomeric copolymer (EP) higher than in the elastomeric copolymer (EP) and
- the specified elastomeric copolymer (EP) is present in the composition in an amount of from 4 to 36 wt.%, and the elastomeric copolymer (EP) is present in the composition in an amount of from 2 to 36 wt.%, and
- to icesto parts of ethylene elastomeric copolymer (EP) is in the range from 20 to 70 wt.% and/or
the number of units of ethylene elastomeric copolymer (EP) is more than 50 wt.%.

5. Composition according to claims 1 and 2, characterized in that the weight ratio of high density polyethylene and the amount of elastomeric copolymer is from 1:10 to 2:1.

6. The composition of claims 1 and 2, characterized in that
- polypropylene matrix is a propylene homopolymer and/or
elastomeric copolymer (copolymer) is an ethylene-propylene rubber and/or polymer-based etilenpropilendienovogo monomer.

7. Composition according to claims 1 and 2, characterized in that the high density polyethylene
has the rate of flow of the melt P2(190°C.)measured according to ISO 1133, equal to from 0.1 to 7.0 g/10 min, and/or
- is the ratio of velocities (CST) (CTP21(190°C)/P2(190°C.))equal to from 20 to 150, and/or
- contains a fraction (a) and fraction (B), and
(i) the fraction (A) has a lower srednevekovoy molecular mass Mwmeasured according to ISO 16014, and/or lower the flow velocity of the melt P2(190°C.)measured according to ISO 1133 than the specified fraction (C), and
(ii) the weight ratio between component (a) and fraction (B) is in the range from 70:30 to 30:70.

8. The composition according to claim 7, characterized in that
- specified fraction (A) has
(i) srednevekovoy molecular mass Mwmeasured with the according to ISO 16014, component from 10000 to 50000 g/mol, and/or
(ii) the rate of flow of the melt P2(190°C)measured according to ISO 1133, comprising from 50 to 1000 g/10 min, and/or
(iii) the density measured according to ISO 1183-187, component from 950 to 980 kg/m3and
- specified fraction (C) has
(i) srednevekovoy molecular mass Mwmeasured according to ISO 16014, component from 75,000 to 500000 g/mol, and/or
(ii) the rate of flow of the melt P2(190°C)measured according to ISO 1133, comprising from 0.01 to 1.00 g/10 min, and/or
(iii) the density measured according to ISO 1183-187, component from 920 to 950 kg/m3.

9. Composition for improving strength polypropylene at low temperatures, containing:
elastomeric copolymer containing links
(i) ethylene,
(ii) at least one3-C20α-olefin and
(iii) may be non-conjugate diene;
- high-density polyethylene, which represents a bimodal or multimodal polyethylene;
- the usual additives and possibly filler, while
(i) an elastomeric copolymer and high density polyethylene together constitute at least 85 wt.% relative to the weight of the composition, and
(ii) the weight ratio of high density polyethylene and elastomeric copolymer is from 60:40 to 20:80.

10. The composition according to claim 9, wherein the elastomeric copolymer is from the Oh elastomeric copolymer (EP) according to claim 4, and the high density polyethylene is also a polyethylene according to any one of claims 1 to 8.

11. The use of a composition according to claim 9 or 10 for improved toughness heterophase polypropylene, with improvement defined as a
1,2<[(AN+MV)/AN].
where AN+MV represents the impact strength, measured according to ISO 294-1 at -40°C, heterophase polypropylene, which is mixed with the composition according to claim 9 or 10, and
FAILURE is an impact strength measured according to ISO 294-1 at -40°C, the same heterophase polypropylene as used in opposition to,+MV, but without adding the composition according to claim 9 or 10.

12. Method for heterophase propylene composition according to claim 1, containing:
polypropylene matrix, in the amount of at least 36 wt.%
elastomeric copolymer (copolymer) in an amount of at least 6 wt.%, contains links
(i) ethylene,
(ii) at least one3-C20α-olefin and
(iii) may be non-conjugate diene;
- high density polyethylene in an amount of from 6 to 27 wt.%, representing a bimodal or multimodal polyethylene, and
- the inorganic filler in the amount of at least 5 wt.%, moreover, the method includes a step of mixing, preferably in the melt:
- heterophase polypropylene, including
(i) the polypropylene matrix, and
(ii) indicated the p elastomeric copolymer, dispersed in the specified polypropylene matrix
the composition according to claim 9 or 10, and
- inorganic filler.

13. The method according to item 12, where
from 40 to 90 wt.% heterophase polypropylene;
- from 5 to 45 wt.% the composition according to claim 9 or 10; and
from 5 to 20 wt.% inorganic filler
mixed together, preferably in the melt.

14. The product, preferably a product obtained by the method of injection molding, containing a composition according to any one of claims 1 to 8.



 

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3 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: present invention relates to a low-flammability moulding composition based on polypropylene as well as fibre and a film made from said composition.

EFFECT: invention reduces flammability of polypropylene without deterioration of physical and mechanical properties of the obtained low-flammability polypropylene granulate as well as articles based thereon.

3 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: present invention relates to a low-flammability moulding composition based on polypropylene as well as fibre and a film made from said composition.

EFFECT: invention reduces flammability of polypropylene without deterioration of physical and mechanical properties of the obtained low-flammability polypropylene granulate as well as articles based thereon.

3 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: present invention relates to a low-flammability moulding composition based on polypropylene as well as fibre and a film made from said composition.

EFFECT: invention reduces flammability of polypropylene without deterioration of physical and mechanical properties of the obtained low-flammability polypropylene granulate as well as articles based thereon.

3 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing a thermoplastic elastomer composition based on polyethylene and chlorosulphonated polyethylene for making various elastic industrial rubber articles by extrusion, pressure moulding and blow moulding. The method is realised by dynamic mixing of polyethylene with chlorosulphonated polyethylene in the presence of a vulcanising system which contains magnesium oxide, a mixture of organic acids and a mixture of sulphur vulcanisation accelerators of a group of thiazoles. At the step of dynamic mixing of polymers, magnesium oxide is added first, followed addition of a mixture of organic acids in a combination with a mixture of sulphur vulcanisation accelerators to carry out dynamic vulcanisation.

EFFECT: composition obtained using the invention has high resistance to aggressive media, oil and petrol resistance and frost resistance, while maintaining resistance to ozone and the atmosphere.

3 cl, 2 tbl, 7 ex

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