阅读说明：本技术 具有改善的韧性的聚丙烯-聚乙烯组合物 (Polypropylene-polyethylene compositions with improved toughness ) 是由 王静波 马库斯·加尔艾特纳 克劳斯·贝恩赖特纳 赫尔曼·布朗 于 2020-04-28 设计创作，主要内容包括：本发明涉及聚合物组合物,所述聚合物组合物包含至少以下组分：A)基于聚合物组合物的总重量的40重量％至94重量％的聚合物共混物,所述聚合物共混物包含a1)50重量％至95重量％的聚丙烯；a2)5重量％至50重量％的聚乙烯；C)基于聚合物组合物的总重量的3重量％至30重量％的为丙烯与1-己烯的共聚物的增容剂,所述丙烯与1-己烯的共聚物包含b1)30重量％至70重量％的丙烯与1-己烯的第一无规共聚物；以及b2)30重量％至70重量％的具有比第一无规丙烯共聚物b1)更高的1-己烯含量的丙烯与1-己烯的第二无规共聚物；3重量％至30重量％的改性剂,所述改性剂选自塑性体、不同于组分B)的多相聚丙烯共聚物及其混合物；条件是组分a1)和a2)的重量占比相加为100重量％；组分b1)和b2)的重量占比相加为100重量％；组分A)、B)和C)的重量占比相加为100重量％；组分A)的根据ISO 1133确定的MFR-(2)(230℃,2.16kg)在1.0g/10分钟至0.0g/10分钟的范围内；以及组分B)的1-己烯含量在2.0重量％至8.0重量％的范围内。本发明还涉及用于制造所述聚合物组合物的方法,涉及组分B)和C)作为用于聚合物共混物A)的增容剂的用途,以及涉及包含根据本发明的聚合物组合物的制品。(The present invention relates to a polymer composition comprising at least the following components: A) from 40 to 94% by weight, based on the total weight of the polymer composition, of a polymer blend comprising a1) from 50 to 95% by weight of polypropylene; a2)5 to 50 weight percent of a polyethylene; C)3 to 30 wt. -%, based on the total weight of the polymer composition, of a compatibilizer that is a copolymer of propylene and 1-hexene comprising b1)30 to 70 wt. -% of a first random copolymer of propylene and 1-hexene; and b2)30 to 70% by weight of a propylene copolymer having a higher 1-hexene content than the first random propylene copolymer b1)A second random copolymer of propylene with 1-hexene; 3 to 30 wt. -% of a modifier selected from the group consisting of plastomers, heterophasic polypropylene copolymers different from component B) and mixtures thereof; with the proviso that the weight fractions of components a1) and a2) add up to 100% by weight; the weight fractions of components b1) and b2) add up to 100% by weight; the weight percentages of components A), B) and C) add up to 100% by weight; MFR determined according to ISO 1133 of component A) 2 (230 ℃, 2.16kg) in the range of 1.0g/10 min to 0.0g/10 min; and the 1-hexene content of component B) is in the range of 2.0 to 8.0 wt.%. The invention also relates to a process for the manufacture of the polymer composition, to the use of components B) and C) as compatibilizers for polymer blend a), and to articles comprising the polymer composition according to the invention.)

1. A polymer composition comprising at least the following components:

A) from 40 to 94 wt%, based on the total weight of the polymer composition, of a polymer blend comprising

a1)50 to 95 weight percent polypropylene;

a2)5 to 50 weight percent of a polyethylene;

B) 3 to 30 wt. -%, based on the total weight of the polymer composition, of a compatibilizer that is a copolymer of propylene and 1-hexene comprising

b1)30 to 70 weight percent of a first random copolymer of propylene and 1-hexene; and

b2)30 to 70% by weight of a second random copolymer of propylene with 1-hexene having a higher 1-hexene content than the first random propylene copolymer b 1);

C)3 to 30 wt. -% of a modifier selected from the group consisting of plastomers, heterophasic polypropylene copolymers different from component B) and mixtures thereof;

provided that

The weight fractions of components a1) and a2) add up to 100% by weight;

the weight fractions of components b1) and b2) add up to 100% by weight;

the weight percentages of components A), B) and C) add up to 100% by weight;

MFR of component A) determined according to ISO 1133₂(230 ℃, 2.16kg) in the range of 1.0g/10 min to 50.0g/10 min; and

the 1-hexene content of component B) is in the range from 2.0% to 8.0% by weight.

2. The polymer composition according to claim 1,

component C) is a plastomer comprising ethylene, preferably a copolymer of ethylene and 1-octene, more preferably having a molecular weight of at 0.860g/cm³To 0.930g/cm³Even more preferably has an MFR determined according to ISO 1133 in the range of 0.1g/10 min to 40.0g/10 min₂(190 ℃, 2.16kg), and most preferably has a molecular weight of at 0.865g/cm³To 0.920g/cm³A density in the range of (1) and an MFR in the range of 0.3g/10 min to 35g/10 min, determined according to ISO 1133₂(190 ℃, 2.16kg) of a copolymer of ethylene and 1-octene; and/or

Component C) is a heterophasic polypropylene copolymer comprising:

c1)70.0 to 90.0 wt% of a crystalline polypropylene matrix; and

c2)10.0 to 30.0 wt% of an amorphous propylene-ethylene copolymer comprising 35.0 to 70.0 wt% of ethylene;

wherein the weight percentages of components c1) and c2) add up to 100% by weight;

preferably, the MFR of the heterophasic polypropylene copolymer C) is determined according to ISO 1133₂(230 ℃, 2.16kg) was in the range of 1.0g/10 min to 10.0g/10 min.

3. Polymer composition according to claim 1 or 2,

the content of component a) in the polymer composition is in the range of from 50 to 91 wt. -%, preferably in the range of from 58 to 87 wt. -%, and more preferably in the range of from 83 to 87 wt. -%, based on the total weight of the polymer composition, when component C) is a plastomer, or in the range of from 73 to 81 wt. -%, based on the total weight of the polymer composition, when component C) is a heterophasic polypropylene copolymer; and/or

The content of component B) in the polymer composition is in the range of from 5 to 25 wt. -%, preferably in the range of from 8 to 22 wt. -%, and more preferably in the range of from 9 to 11 wt. -%, based on the total weight of the polymer composition; and/or

The content of component C) in the polymer composition is in the range of from 4 to 25 wt. -%, preferably in the range of from 5 to 20 wt. -%, and more preferably in the range of from 4 to 6 wt. -%, based on the total weight of the polymer composition, for plastomers, or in the range of from 10 to 16 wt. -%, based on the heterophasic polypropylene copolymer; and/or

The content of polypropylene a1) in component a) is in the range of 53 to 92 wt. -%, preferably in the range of 55 to 90 wt. -%, and more preferably in the range of 58 to 87 wt. -%; and/or

The content of polyethylene a2) in component a) is in the range of 8 to 47 wt. -%, preferably in the range of 10 to 45 wt. -%, and more preferably in the range of 13 to 42 wt. -%.

4. Polymer composition in accordance with one of the preceding claims,

MFR determined according to ISO 1133 of component A)₂(230 ℃, 2.16kg) in the range of from 1.5g/10 minutes to 35.0g/10 minutes, preferably in the range of from 2.0g/10 minutes to 25.0g/10 minutes, and more preferably in the range of from 5.0g/10 minutes to 10.0g/10 minutes; and/or

MFR determined according to ISO 1133 of component B)₂(230 ℃, 2.16kg) in the range of 0.4g/10 min to 12.0g/10 min, preferably in the range of 0.6g/10 min to 9.0g/10 min, more preferably in the range of 0.8g/10 min to 6.0g/10 min, and most preferably in the range of 1.0g/10 min to 4.0g/10 min; and/or

The xylene solubles content (XCS) of component B) is ≥ 8, preferably in the range from 8% to 30% by weight, more preferably in the range from 10.0% to 28.0% by weight, and most preferably in the range from 15% to 28% by weight, based on the total weight of component B); and/or

The 1-hexene content in component B) is in the range of 3.0 to 7.5 wt. -%, preferably in the range of 3.5 to 7.2 wt. -%, and more preferably in the range of 4.0 to 6.0 wt. -%; and/or

The 1-hexene content C6(XCS) of the xylene soluble fraction of component B) is in the range of 2.0 to 15.0 wt. -%, preferably in the range of 2.5 to 12.0 wt. -%, more preferably in the range of 3.0 to 10.0 wt. -%, and most preferably in the range of 5.0 to 8.0 wt. -%, based on the total weight of component B); and/or

Component B) has a melting point >120 ℃, preferably in the range of 125 ℃ to 145 ℃, and more preferably in the range of 130 ℃ to 140 ℃; and/or

The enthalpy of fusion of component a 2)/the enthalpy of fusion of a1) in the polymer composition is in the range of 0.2 to 2.0, and preferably in the range of 0.25 to 1.75.

5. The polymer composition according to any of the preceding claims, characterized in that the polymer composition has

An MFR, determined according to ISO 1133, in the range of 1.0g/10 min to 50.0g/10 min, preferably in the range of 1.5g/10 min to 35.0g/10 min, more preferably in the range of 2.0g/10 min to 25.0g/10 min and most preferably in the range of 3.5g/10 min to 8.0g/10 min₂(230 ℃, 2.16 kg); and/or

A tensile modulus measured according to ISO 527-2 in the range 800MPa to 1500MPa and preferably in the range 800MPa to 1000 MPa; and/or

An elongation at break measured according to ISO 527-2 of more than 300%, preferably in the range of 350% to 1000% and more preferably in the range of 400% to 900%; and/or

Greater than 8.0kJ/m measured at 23 ℃ according to ISO 179-1eA²Preferably at 8.5kJ/m²To 30kJ/m²More preferably in the range of 9.0kJ/m²To 25kJ/m²And more preferably in the range of 9kJ/m²To 11kJ/m²Charpy notched impact strength in the range of (a).

6. Polymer composition according to any one of the preceding claims,

MFR determined according to ISO 1133 of component b1)₂(230 ℃, 2.16kg) in the range of 0.3g/10 min to 12.0g/10 min, preferably in the range of 0.5g/10 min to 9.0g/10 min, and more preferably in the range of 0.7g/10 min to 6.0g/10 min; and/or

MFR determined according to ISO 1133 of component b2)₂(230 ℃, 2.16kg) in the range of 0.5g/10 min to 14.0g/10 min, preferably in the range of 0.7g/10 min to 11.0g/10 minAnd more preferably in the range of 0.9g/10 minutes to 8.0g/10 minutes; and/or

The content of C6 in component b1) is in the range of 0.1 to 4.0 wt. -%, preferably in the range of 0.5 to 3.5 wt. -%, and more preferably in the range of 0.8 to 3.0 wt. -%, based on the total weight of component b 1); and/or

The content of C6 in component b2) is in the range of 4.0 to 15.0 wt. -%, preferably in the range of 5.0 to 13.0 wt. -%, and more preferably in the range of 6.0 to 12.0 wt. -%, based on the total weight of component b 2); and/or

The content of component B1) in component B) is from 35 to 65% by weight, and preferably from 40 to 60% by weight; and/or

The content of component B2) in component B) is from 35 to 65% by weight, and preferably from 40 to 60% by weight.

7. Polymer composition according to any one of the preceding claims,

component C) is a plastomer and has

At 0.860g/cm³To 0.930g/cm³In the range of (1), preferably in the range of 0.865g/cm³To 0.920g/cm³And more preferably 0.868g/cm³A density within the range of (a); and/or

An MFR determined according to ISO 1133 in the range of 0.1g/10 min to 40.0g/10 min, preferably in the range of 0.4g/10 min to 32.0g/10 min, and more preferably in the range of 0.5g/10 min to 1.5g/10 min₂(190 ℃, 2.16 kg); or

Component (C) is a heterophasic polypropylene copolymer and has

An MFR determined according to ISO 1133 in the range of 1.0g/10 min to 10.0g/10 min, preferably in the range of 1.5g/10 min to 8.0g/10 min, and more preferably in the range of 2.0g/10 min to 7.0g/10 min₂(230 ℃, 2.16 kg); or

The xylene solubles content (XCS) of component C) is in the range of 10.0 to 30.0 wt. -%, preferably in the range of 12.0 to 25.0 wt. -%, and more preferably in the range of 14 to 20 wt. -%, based on the total weight of component C); and/or

The ethylene content C2(XCS) of the xylene soluble fraction of component C) is in the range of 35.0 to 70.0 wt. -%, preferably in the range of 40.0 to 65.0 wt. -%, and more preferably in the range of 45.0 to 60.0 wt. -%, based on the total weight of component C); and/or

The xylene cold soluble fraction (XCl) of component C) is in the range of 70.0 to 90.0 wt. -%, preferably in the range of 75.0 to 88.0 wt. -%, and more preferably in the range of 80.0 to 86.0 wt. -%, based on the total weight of component C).

8. Polymer composition according to any one of the preceding claims,

component a) is a recycled material, preferably recycled from waste plastic material derived from post-consumer waste and/or post-industrial waste; and/or

The polymer composition comprises at least one additive, preferably selected from slip agents, UV stabilizers, pigments, antioxidants, additive carriers, nucleating agents and mixtures thereof, whereby these additives are preferably present in 0 to 5% by weight and more preferably in 0.1 to 4% by weight, based on the total weight of the polymer composition.

9. Polymer composition according to any one of the preceding claims,

the polymer composition has a higher charpy notched impact strength measured according to ISO 179-1eA at 23 ℃, preferably at least 10% higher, more preferably from 10% to 25% higher, even more preferably at least 25% higher, than the same polymer composition without components B) and C); and

while having a tensile modulus measured according to ISO 527-2 of at least 800MPa and preferably in the range of 800MPa to 1000 MPa.

10. Polymer composition according to any one of the preceding claims,

component B) is an in-reactor blend obtained by a sequential polymerization process in at least two reactors connected in series, said sequential polymerization process preferably comprising the steps of:

(i) in a first reactor, which is a slurry reactor, preferably a loop reactor, propylene is polymerized with 1-hexene to obtain a first random propylene copolymer b1),

(ii) transferring the first random propylene copolymer b1) and unreacted comonomer of the first reactor to a second reactor being a gas phase reactor,

(iii) feeding propylene and 1-hexene to the second reactor,

(iv) polymerizing propylene with 1-hexene in the second reactor and in the presence of the first random propylene copolymer B1) obtaining a second random propylene copolymer B2), the first random propylene copolymer B1) and the second random propylene copolymer B2) forming component B),

wherein in addition

In the first and second reactors, the polymerization takes place in the presence of a solid catalyst system, the Solid Catalyst System (SCS) comprising a single-site catalyst.

11. Polymer composition according to any one of the preceding claims,

the polymer composition consists of the following components:

A) 60 to 89 weight percent of a polymer blend comprising based on the total weight of the polymer composition

a1)55 to 90 wt% of polypropylene;

a2)10 to 45 weight percent of polyethylene;

B) 8 to 22 wt% of a copolymer of propylene and 1-hexene comprising, based on the total weight of the polymer composition

b1)30 to 70 weight percent of a first random copolymer of propylene and 1-hexene; and

b2)30 to 70% by weight of a second random copolymer of propylene with 1-hexene having a higher 1-hexene content than the first random propylene copolymer b 1); and

C)3 to 7% by weight, based on the total weight of the polymer composition, of a plastomer consisting of ethylene and 1-octene, the plastomer having a density of between 0.860g/cm³To 0.930g/cm³A density in the range of (1) and an MFR in the range of 0.1g/10 min to 40.0g/10 min, determined according to ISO 1133₂(190 ℃, 2.16 kg); or

12 to 18 wt. -%, based on the total weight of the polymer composition, of a heterophasic polypropylene copolymer comprising

c1)70.0 to 90.0 wt% of a crystalline polypropylene matrix; and

c2)10.0 to 30.0 wt% of an amorphous propylene-ethylene copolymer comprising 35.0 to 70.0 wt% of ethylene;

MFR determined according to ISO 1133 of the heterophasic polypropylene copolymer₂(230 ℃, 2.16kg) in the range of 1.0g/10 min to 10.0g/10 min;

provided that

MFR of component A) determined according to ISO 1133₂(230 ℃, 2.16kg) in the range of 2.0g/10 min to 25.0g/10 min;

MFR determined according to ISO 1133 of component B)₂(230 ℃, 2.16kg) in the range of 0.8g/10 min to 5.0g/10 min;

a xylene solubles content (XCS) of component B) ranging from 10 to 28% by weight, based on the total weight of component B);

the 1-hexene content in component B) is in the range from 3.5 to 7.2% by weight.

12. Use of a component B) as claimed in claims 1,4, 6 and of a component C) as claimed in claims 1,2 and 7 for compatibilizing polymer blends A) as claimed in claims 1,4 and 8.

13. Use according to claim 12,

the ratio between component B) and the polymer blend a) is in the range of 1:20 to 1:3, and preferably in the range of 1:6 to 1: 10; and/or

When component C) is a plastomer, the ratio between component C) and the polymer blend a) is in the range of from 1:30 to 1:8, and preferably in the range of from 1:12 to 1: 22; or

When component C) is a heterophasic polypropylene copolymer, the ratio between component C) and the polymer blend a) is in the range of 1:3 to 1:15, and preferably in the range of 1:4 to 1: 7; and/or

When component C) is a plastomer, the ratio between component C) and the polymer blend B) is in the range of 1:1.5 to 1:4, and preferably in the range of 1:1.8 to 1: 2.5; or

When component C) is a heterophasic polypropylene copolymer, the ratio between component B) and the polymer blend C) is in the range of 1:1 to 1:3, and preferably in the range of 1:1.3 to 1: 1.7.

14. Use according to claim 12 or 13,

the polymer blend a) has an increased charpy notched impact strength measured according to ISO 179-1eA at 23 ℃, preferably an increase of at least 10%, more preferably an increase of 10% to 25%, and even more preferably an increase of at least 25%, and at the same time the polymer blend a) has a tensile modulus measured according to ISO 527-2 that remains at least 800MPa, preferably 800MPa to 1000 MPa.

15. A process for compatibilizing the components of the polymer blends A) as claimed in claims 1, 3 and 6, comprising the steps of:

(IV) providing polymer blend a) as described in claims 1,4 and 8;

(V) adding component B) as claimed in claims 1,4 and 6 and component C) as claimed in claims 1,2 and 7);

(VI) mixing the components A), B) and C) to obtain the compatibilized polymeric composition.

16. The method of claim 15,

the polymer composition obtained after step (III) has a higher charpy notched impact strength measured at 23 ℃ according to ISO 179-1eA, preferably at least 10% higher, more preferably from 10% to 25% higher, and more preferably at least 25% higher, than the polymer blend a) provided in step (I) without the composition of component B); and at the same time a tensile modulus of at least 800MPa and preferably in the range of 800MPa to 1000MPa, measured according to ISO 527-2.

17. An article comprising the polymer composition of any one of claims 1 to 11.

18. A film, tube, extrusion blow molded article or injection molded article comprising greater than 80 wt% of the polymer composition of any of claims 1 to 11.