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70重量％至97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；B)基于聚合物组合物的总重量的3重量％至30重量％的丙烯与1-己烯的共聚物,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；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)的根据ISO 1133确定的MFR-(2)(230℃,2.16kg)在1.0g/10分钟至50.0g/10分钟的范围内；基于组分B)的总重量,组分B)的1-己烯含量在2.0重量％至8.0重量％的范围内；以及所述聚合物组合物不含为密度在0.860g/cm～(3)至0.930g/cm～(3)的范围内的乙烯与1-辛烯的弹性体共聚物的塑性体。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)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 70 to 97% 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; B) 3 to 30 wt. -%, based on the total weight of the polymer composition, of 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 propylene having a higher 1-hexene content than the first random propylene copolymer b1) with 1-A second random copolymer of hexene; 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; MFR determined according to ISO 1133 of component A) 2 (230 ℃, 2.16kg) in the range of 1.0g/10 min to 50.0g/10 min; the 1-hexene content of component B) is in the range of from 2.0 to 8.0 wt. -%, based on the total weight of component B); and the polymer composition does not contain 3 To 0.930g/cm 3 A plastomer of an elastomeric copolymer of ethylene and 1-octene in the range of (a). The invention also relates to a process for the manufacture of said polymer composition, to the use of component B) as a compatibilizer for polymer blend a), and to an article comprising the polymer composition according to the invention.)

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

A) from 70 to 97 weight percent of a polymer blend based on the total weight of the polymer composition, the polymer blend comprising

a1)50 to 95 weight percent polypropylene;

a2)5 to 50 weight percent of a polyethylene;

B) 3 to 30 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);

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;

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;

a 1-hexene content of component B) ranging from 2.0% to 8.0% by weight, based on the total weight of component B); and

the polymer composition does not contain³To 0.930g/cm³A plastomer of an elastomeric copolymer of ethylene and 1-octene in the range of (a).

2. The polymer composition according to claim 1,

the content of component a) in the polymer composition is in the range of from 75 to 95 wt. -%, preferably in the range of from 78 to 92 wt. -%, and more preferably in the range of from 80 to 91 wt. -%, based on the total weight of the polymer composition; 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 20 wt. -%, based on the total weight of the polymer composition; 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. -%.

3. Polymer composition according to claim 1 or 2,

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) is 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 minMore 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.

4. 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 above 900MPa and preferably in the range 900MPa to 1500 MPa; and/or

A flexural modulus measured according to ISO 178 above 900MPa and preferably in the range of 1000MPa to 1600 MPa; and/or

Measured according to ISO 179-1eA at 23 ℃>3kJ/m²Preferably at 3.3kJ/m²To 30kJ/m²And more preferably in the range of 3.3kJ/m²To 10kJ/m²Charpy notched impact strength in the range of (a).

5. 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 min, and more preferably in the range of 0.9g/10 min to 8.0g/10 min; 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.

6. 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 is free of plastomer; 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.

7. 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 5% higher, more preferably from 5% to 15% higher, and even more preferably at least 10% higher, than the same polymer composition without component B); and is

While having a tensile modulus measured according to ISO 527-2 above 900MPa and preferably in the range of 900MPa to 1500 MPa.

8. 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.

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

the polymer composition consists of the following components:

C) from 78 wt% to 92 wt%, based on the total weight of the polymer composition, of a polymer blend comprising

a1)55 to 90 wt% of polypropylene;

a2)10 to 45 weight percent of polyethylene;

D) 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);

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); and

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

10. Use of component B) as claimed in claims 1, 3, 5 and 8 as a compatibilizer in polymer blends A) as claimed in claims 1, 3 and 6.

11. Use according to claim 10,

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 1:8 to 1: 10.

12. Use according to claim 10 or 11,

the polymer blend a) has an increase in charpy notched impact strength measured according to ISO 179-1eA at 23 ℃ of at least 5%, preferably an increase of from 5% to 10%, and more preferably an increase of at least 10%, and at the same time the polymer blend a) has a tensile modulus measured according to ISO 527-2 that remains above 900MPa and more preferably in the range of from 900MPa to 1500 MPa.

13. 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, 3 and 6;

(V) adding component B) as described in claims 1, 3, 5 and 8;

(VI) mixing the two components to obtain the compatibilized polymeric composition.

14. The method of claim 13,

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 5% higher, more preferably from 5% to 10% higher, and even more preferably at least 10% higher, than the polymer blend a) provided in step (I) without component B); and at the same time a tensile modulus measured according to ISO 527-2 above 900MPa and preferably in the range from 900MPa to 1500 MPa.

15. An article comprising the polymer composition of any one of claims 1 to 9.

16. 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 9.