阅读说明：本技术 具有高的刚度和加工性的富含pp的材料组合物 (PP-rich material composition with high rigidity and processability ) 是由 S.卡琳 M.加勒伊特纳 C.特拉宁格 B.库尔什雷什塔 于 2018-05-02 设计创作，主要内容包括：本发明涉及聚烯烃组合物,所述聚烯烃组合物以与一种或多种原生聚合物的配混物形式用于汽车制品或应用、供施工应用之用的管道或型材的用途,多相聚丙烯(HECO)作为用于聚烯烃共混物A)、乙烯和一种或多种C4-C19α-烯烃的共聚物B)与增强矿物填料D)之间的相容剂的用途,以及用于制造所述聚烯烃组合物的工艺。(The present invention relates to a polyolefin composition for use in automotive articles or applications, pipes or profiles for construction applications, in the form of a compound with one or more virgin polymers, the use of heterophasic polypropylene (HECO) as a compatibilizer between a polyolefin blend a), a copolymer B) of ethylene and one or more C4-C19 alpha-olefins, and a reinforcing mineral filler D), and a process for manufacturing the polyolefin composition.)

1. A polyolefin composition comprising

A) 40 to 80 wt. -%, based on the total weight of the polyolefin composition, of a blend of at least two different polyolefins comprising at least 65 wt. -%, based on the total weight of the polyolefin blend, of polypropylene,

B) 14-60 wt. -%, based on the total weight of the polyolefin composition, of a heterophasic polypropylene (HECO), wherein

i) The melt flow rate MFR2(230 ℃,2.16kg) of the heterophasic polypropylene measured according to ISO1133 is at least 30g/10min,

ii) the relative amount of Xylene Cold Soluble (XCS) fraction is at least 10.0 wt%, and

iii) the intrinsic viscosity of the XCS fraction of the heterophasic polypropylene is at least 2.0dl/g measured in decalin according to DIN ISO 1628/1 at 135 ℃,

C) 3 to 12 wt. -%, based on the total weight of the polyolefin composition, of a copolymer of ethylene and one or more C4 to C19 alpha-olefins having a density measured according to ASTM D792 in the range of 850-885g/m3 and a melt flow rate MFR2(190 ℃,2.16kg) measured according to ISO1133 in the range of 0.05 to 5g/10min, and

D) 3 to 12% by weight of a reinforcing mineral filler, based on the total weight of the polyolefin composition.

2. The polyolefin composition according to claim 1, wherein the blend of at least two different polyolefins comprises

a) 65-95 wt%, preferably 65-90 wt%, more preferably 65-85 wt% and most preferably 65-78 wt% of polypropylene, based on the total weight of the polyolefin blend, and

b) From 5 to 35 wt%, preferably from 10 to 35 wt%, more preferably from 15 to 35 wt% and more preferably from 22 to 35 wt% of polyethylene, based on the total weight of the polyolefin blend.

3. The polyolefin composition according to claim 1 or 2, wherein the polyolefin composition has a melt flow rate MFR2(230 ℃,2.16kg) measured according to ISO1133 in the range of 15 to 35g/10 min.

4. The polyolefin composition according to any of the preceding claims, wherein the polyolefin composition has

i) A tensile modulus measured according to ISO 527-3 in the range 1000-

ii) a simple beam notched impact strength measured according to ISO 179/leA at +23 ℃ in the range of 4.5-10.0kJ/m2, and

iii) a Heat Distortion Temperature (HDT) measured according to ISO75A in the range of 48-55 ℃.

5. polyolefin composition according to any of the preceding claims wherein the heterophasic polypropylene (HECO) has a Xylene Cold Soluble (XCS) fraction as measured according to ISO 16152(23 ℃) in the range of 12.0 to 30.0 wt. -%, based on the total weight of the heterophasic polypropylene (HECO).

6. Polyolefin composition according to any of the preceding claims wherein the heterophasic polypropylene (HECO) has a comonomer content in the range of 2.0 to 15.0 wt. -%, based on the total weight of the heterophasic polypropylene (HECO).

7. Polyolefin composition according to any of the preceding claims wherein the heterophasic polypropylene (HECO) comprises

a) 70-90% by weight of a matrix (M) selected from isotactic polypropylene homopolymers or polypropylene random copolymers of propylene with ethylene and/or C4-C8 alpha-olefins, and

b) 10-30% by weight of an elastomeric propylene copolymer (EC) dispersed in said matrix (M).

8. Polyolefin composition according to claim 7 wherein said matrix (M) of said heterophasic polypropylene (HECO) has

a) A melt flow rate MFR2(230 ℃,2.16kg) measured according to ISO1133 in the range of 30-500g/10 min.

9. Polyolefin composition according to claim 7 or 8, wherein the matrix (M) of the heterophasic polypropylene (HECO) has

a) A comonomer content of equal to or less than 1.0 wt.%, and/or

b) Equal to or less than 3.5 wt% of a Xylene Cold Soluble (XCS) fraction measured according ISO 16152(23 ℃), based on the total weight of the matrix.

10. Polyolefin composition according to any of claims 7 to 9 wherein

a) The comonomer of the Elastomeric Copolymer (EC) is ethylene and/or at least a C4-C10 alpha-olefin, and/or

b) The amorphous phase (AM) of the xylene soluble fraction (XCS) of the heterophasic polypropylene (HECO) has a comonomer content of less than 50.0 wt. -%.

11. use of a polyolefin composition according to any of claims 1 to 10 in the form of a compound with one or more virgin polymers for: automotive articles or applications, pipes or profiles for construction applications.

12. use of a heterophasic polypropylene (HECO) as a compatibilizer between a polyolefin blend a), a copolymer B) of ethylene and one or more C4-C19 alpha-olefins, and a reinforcing mineral filler D), said heterophasic polypropylene (HECO) having the following properties:

i) The melt flow rate MFR2(230 ℃,2.16kg) of the heterophasic polypropylene measured according to ISO1133 is at least 30g/10min,

ii) the relative amount of Xylene Cold Soluble (XCS) fraction is at least 10.0 wt%, and

ii) the intrinsic viscosity of the XCS fraction of the heterophasic polypropylene is at least 2.0dl/g measured in decalin according to DINISO 1628/1 at 135 ℃.

13. Process for manufacturing a polyolefin composition according to any of claims 1 to 10, said process comprising the steps of

a) Providing a blend of at least two different polyolefins in an amount of 40 to 80 wt%, based on the total weight of the polyolefin composition, the blend of at least two different polyolefins comprising greater than 65 wt% of polypropylene, based on the total weight of the polyolefin blend,

b) Providing heterophasic polypropylene (HECO) in an amount of 14 to 60 wt. -%, based on the total weight of the polyolefin composition, wherein

i) The melt flow rate MFR2(230 ℃,2.16kg) of the heterophasic polypropylene measured according to ISO1133 is higher than 30g/10min,

ii) the relative amount of Xylene Cold Soluble (XCS) fraction is at least 10.0 wt%, and

iii) the intrinsic viscosity of the XCS fraction of the heterophasic polypropylene is at least 2.0dl/g measured in decalin according to DIN ISO 1628/1 at 135 ℃,

c) Providing a copolymer of ethylene and one or more C4-C19 alpha-olefins in an amount of 3 to 12 wt. -%, based on the total weight of the polyolefin composition, the copolymer having a density measured according to ASTM D792 in the range of 850-885g/m3 and a melt flow rate MFR2(190 ℃,2.16kg) measured according to ISO1133 in the range of 0.05 to 5g/10min,

d) Providing a reinforcing mineral filler in an amount of 3 to 12 wt. -%, based on the total weight of the polyolefin composition, and

e) Melting and blending the blend of the at least two different polyolefins of step a) with the heterophasic polypropylene (HECO) of step b), the copolymer of ethylene and one or more C4-C19 alpha-olefins of step C), and the reinforcing mineral filler of step d).

14. The process according to claim 13, wherein the blend of at least two different polyolefins is a recycled polyolefin recovered from waste polyolefin material obtained from post-consumer and/or post-industrial waste, and/or the blend of at least two different polyolefins comprises

a) 65-95 wt%, preferably 65-90 wt%, more preferably 65-85 wt% and most preferably 65-78 wt% of polypropylene, based on the total weight of the polyolefin blend, and

b) From 5 to 35 wt%, preferably from 10 to 35 wt%, more preferably from 15 to 35 wt% and most preferably from 22 to 35 wt% of polyethylene, based on the total weight of the polyolefin blend.

15. The process according to claim 14, wherein the process further comprises a step al) of producing recycled polyolefin of step a) by melting and mixing the waste polyolefin material obtained from post-consumer and/or post-industrial waste.

2. Examples of the embodiments

Materials used

Component A)

Polyolefin blend:

Purpolen PP is a recycled polymer mixture comprising polyethylene and polypropylene obtained from mtm plastics GmbH, Niedergebra, Germany, having a polyethylene content of 24.4% by weight and a polypropylene content of 68.6% by weight, determined by DSC analysis, an MFR2(230 ℃ C.; 2.16kg) of 22.3g/10min and a density of 924kg/m3 (ASTM D792). Melting points determined by DSC were 164 ℃ (PP) and 128 ℃ (PE).

Component B)

A compatilizer:

The properties of the heterophasic copolymer 1(HECO-1) are summarized in table 1 below.

table 1: properties of the heterophasic propylene copolymer HECO-1

the properties of the heterophasic copolymer 2(HECO-2) are summarized in Table 2.

Table 2: properties of the heterophasic propylene copolymer HECO-2

		HECO-2
			Ring pipe
Flow diversion	[ weight% ]	52
			MFR2	[g/10min]	160
XCS	[ weight% ]	2
			Mw	[kg/mol]	149
GPR1
			Flow diversion	[ weight% ]	34
2MFR2 of GPR1	[g/10min]	160
			XCS of GPR1	[ weight% ]	2
GPR2
			Flow diversion	[ weight% ]	14
2MFR2 of GPR2	[g/10min]	95
			XCS of GPR2	[ weight% ]	15
C2 of GPR2	[ weight% ]	7
			C2(AM)	[ weight% ]	39
IV(AM)	[ weight% ]	2.3

Component C)

Ethylene copolymer:

2M138 (ethylene/octene plastomer commercially available from Borealis AG, Austria) having an MFR2(190 ℃; 2.16kg) of 0.5g/10min and a density of 862 kg/M3. The intrinsic viscosity of the copolymer as measured in decalin at 135 ℃ was 2.3 dl/g.

Component D)

Mineral filler:

Imerys Jetfine 3CA (talc) having an average (or median) particle size of 1.3 μm.

Blends of components A), B), C) and D) were prepared on a Coperion ZSK 25 co-rotating twin-screw extruder equipped with a mixing screw configuration having an L/D ratio of 25. The melt strand was solidified in a water bath using a melt temperature of 200-220 ℃ during mixing, after which the strand was pelletized. The same extrusion of the pure material used in the comparative example resulted in some increase in MFR as usual.

The amounts of the different components of the blend including HECO-1 as well as the mechanical properties are summarized in table 3.

Table 3: composition and mechanical properties of blends comprising HECO-1

	CE1	CE2	IE1	IE2
					Purpolen PP	100		60	55
HECO-1		100	30	30
					Ethylene copolymers			5	5
Talc			5	10
					MFR2 230℃/2.16kg[g/10min]	22.3	38.0	22.4	19.2
ash content [% by weight ]	1.4	--	6.0	6.0
					tensile modulus [ MPa ]	1285	1480	1565	1440
Tensile yield stress [ MPa ]	24.9	26.7	23.47	21.87
					Tensile yield strain [% ]	5.6	4.8	4.09	4.41
Tensile breaking stress [ MPa ]	19.8	18.1	18.7	16.4
					Tensile strain at break [% ]	14.3	24.9	15.2	24.6
simply supported beam NIS23 ℃ [ kJ/m2]	5.3	3.1	7.6	8.8
					HDT A[℃]	51	54	52	51

From table 3, it can be understood that by adding component B), component C) and component D) (IE1), the impact strength can be improved to 7.6kJ/m2 and has high stiffness and processability of 1565MPa compared to CE1 and CE 2. For IE2, a notched impact strength of 8.8kJ/m2 was achieved at room temperature with a stiffness of 1440 MPa. The HDT is still as high as the pure polyolefin blend (Purpolen PP). All inventive examples had a relatively high MFR2 of about 20g/10 min.

The amounts of the different components and mechanical properties of the blends comprising HECO-2 are summarized in table 4.

Table 4: composition and mechanical properties of blends comprising HECO-2

	CE1	CE3	IE3	IE4
					Purpolen PP	100		75	70
HECO-2		100	15	15
					Ethylene copolymers			5	5
Talc			5	10
					MFR2 230℃/2.16kg[g/10min]	22.3	102	23.7	20.5
Ash content [% by weight ]	1.4	--	6.2	11.0
					Tensile modulus [ MPa ]	1285	1562	1419	1287
tensile yield stress [ MPa ]	24.9	29.6	22.6	21.0
					Tensile yield strain [% ]	5.6	5.3	4.6	5.2
Strength [ MPa ]	24.9	15.2	22.6	21.0
					Strength Strain [% ]	5.6	5.1	4.6	5.2
2Simply supported beam NIS23 ℃ [ kJ/m2]	5.3	3.5	7.1	8.9
					HDT A[℃]	51	52	50	49

As can be appreciated from table 4, when component B) was used in combination with components C) and D), IE3, both stiffness and impact strength increased significantly to 1419MPa and 7.1kJ/m2, and HDT was 50.4 ℃ and MFR2 was 23.7g/10 min. Further increasing component B) to 10 wt.% raised the impact strength to 8.9kJ/m2 and stiffness was 1287MPa, HDT 49.3 ℃ and MFR2 of 20.5g/10 min.

As demonstrated, the combined addition of component B) with components C) and D) results in a good balance of high stiffness, impact strength and heat distortion temperature and a reasonable melt flow rate. The use of the combination of components B), C) and D) according to the invention in a blend of at least two different polyolefins results in a desired balance of high stiffness/impact/heat distortion temperature at reasonable processability and thus makes the polyolefin composition suitable for its use in e.g. automotive applications.