US 12,674,050 B2Granted

Automotive composition

AssigneeBorealis AG

InventorsJingbo Wang, Markus Gahleitner, Klaus Bernreitner, Pauli Leskinen, Georg Grestenberger

Life of this patent

Estimating the term…

Loading patent…

Abstract

A composition comprising (A) 40 to 80 wt.-% of a first heterophasic composition (HECO1); (B) 7 to 30 wt.-% of a second heterophasic composition (HECO2); (C) 0 to 12 wt.-% of an HDPE; (D) 2 to 12 wt.-% of a plastomer; and (E) 7 to 25 wt.-%, of talc; wherein HECO1 has a Tm of 150 to 159° C., an MFR2 of 20.0 to 120 g/10 min, a CRYSTEX crystalline fraction of 79.0 to 91.0 wt.-%, a CRYSTEX soluble fraction of 9.0 to 21.0 wt.-%, and an ethylene content of 1.5 to 6.5 mol.-%; HECO2 has an MFR2 of 2.0 to 10.0 g/10 min, a CRYSTEX crystalline fraction of 70.0 to 82.0 wt.-%, a CRYSTEX soluble fraction of 18.0 to 30.0 wt.-% and an ethylene content of 9.0 to 20.0 mol.-%; the plastomer being a C2/C8 or a C2/C4 copolymer having a density of 850 to 900 kg/m3.

Claims20

Dependent claims

A composition comprising:

(A) 40 to 80 wt.-%, based on the total composition, of a first heterophasic composition (HECO1);
(B) 7 to 30 wt.-%, based on the total composition, of a second heterophasic composition (HECO2);
(C) 0 to 12 wt.-%, based on the total composition, of a high density polyethylene (HDPE);
(D) 2 to 12 wt.-%, based on the total composition, of plastomer (P);
and
(E) 7 to 25 wt.-%, based on the total composition, of talc (T);
wherein the first heterophasic composition (HECO1) comprising
(a) a propylene homopolymer as the matrix, and
(b) an ethylene-propylene rubber being dispersed in the matrix,
wherein the first heterophasic propylene copolymer (HECO1) has
(i) a melting temperature Tm, measured by DSC according to ISO 11357-3 with a heating and cooling rate of 10° C./min, in the range of 150 to 159° C.;
(ii) a melt flow rate MFR2 (230° C., 2.16 kg), measured according to ISO 1133, in the range from 20.0 to 120 g/10 min;
(ii) a crystalline fraction (CF), determined according to ISO 6427 Annex B in trichlorobenzene at 160° C., present in an amount in the range from 79.0 to 91.0 wt.-%, relative to the total weight of the first heterophasic propylene copolymer (HECO1);
(iii) a soluble fraction (SF), determined according to ISO 6427 Annex B in trichlorobenzene at 160° C., present in an amount in the range from 9.0 to 21.0 wt.-%, relative to the total weight of the first heterophasic propylene copolymer (HECO1);
and
(iv) a total ethylene content, measured by Fourier Transform Infrared Spectroscopy (FTIR) during analysis according to ISO 6427 Annex B, in the range of 1.5 to 6.5 mol.-%, wherein ethylene is the sole comonomer in the first heterophasic composition (HECO1);
wherein the second heterophasic composition (HECO2) comprising
(a) a propylene homopolymer as the matrix, and
(b) an ethylene-propylene rubber being dispersed in the matrix,
wherein the heterophasic propylene copolymer (HECO2) has
(i) a melt flow rate MFR2 (230° C., 2.16 kg), measured according to ISO 1133, in the range from 2.0 to 10.0 g/10 min;
(ii) a crystalline fraction (CF), determined according to ISO 6427 Annex B according to ISO 6427 Annex B, present in an amount in the range from 70.0 to 82.0 wt.-%, relative to the total weight of the heterophasic propylene copolymer (HECO2);
(iii) a soluble fraction (SF), determined according to ISO 6427 Annex B, according to ISO 6427 Annex B present in an amount in the range from 18.0 to 30.0 wt.-%, relative to the total weight of the heterophasic propylene copolymer (HECO2);
and
(iv) a total ethylene content, measured by Fourier Transform Infrared Spectroscopy (FTIR) during analysis according to ISO 6427 Annex B, in the range of 9.0 to 20.0 mol.-%, wherein ethylene is the sole comonomer in the second heterophasic composition (HECO2);
the plastomer being an ethylene 1-octene copolymer or an ethylene 1-butene copolymer having a density measured according to ISO 1183-1 in the range of 850 to 900 kg/m3.

23 more elements

A heterophasic propylene copolymer (HECO1) comprising

(a) a propylene homopolymer as the matrix, wherein the propylene homopolymer has 2,1 regio defects, determined by 13C-NMR, in the range of 0.05 to 0.90%, and
(b) an ethylene-propylene rubber being dispersed in said matrix,
wherein the heterophasic propylene copolymer (HECO1) has
(i) a melting temperature Tm, measured by DSC according to ISO 11357-3 with a heating and cooling rate of 10° C./min, in the range of 153 to 158° C.;
(ii) a melt flow rate MFR2 (230° C., 2.16 kg), measured according to ISO 1133, in the range from 20.0 to 120 g/10 min;
(iii) a crystalline fraction (CF), determined according to ISO 6427 Annex B in trichlorobenzene at 160° C., present in an amount in the range from 79.0 to 91.0 wt.-%, relative to the total weight of the heterophasic propylene copolymer;
(iv) a soluble fraction (SF), determined according to ISO 6427 Annex B in trichlorobenzene at 160° C., present in an amount in the range from 9.0 to 21.0 wt.-%, relative to the total weight of the heterophasic propylene copolymer;
(v) a total ethylene content, measured by Fourier Transform Infrared Spectroscopy (FTIR) during analysis according to ISO 6427 Annex B, in the range of 1.5 to 6.5 mol.-%, wherein ethylene is the sole comonomer in the heterophasic composition (HECO1);
(vi) an ethylene content of the soluble fraction (C2(SF)), measured by Fourier Transform Infrared Spectroscopy (FTIR) during analysis according to ISO 6427 Annex B, in the range from 22.0 to 39.0 mol-%;
(vii) an intrinsic viscosity of the soluble fraction (IV(SF)), measured according to ISO 1628-1 at 135° C. in decalin, in the range from 2.00 to 3.00 dl/g;
(viii) an intrinsic viscosity of the crystalline fraction (IV(CF)), measured according to ISO 1628-1 at 135° C. in decalin, in the range from 1.00 to 1.60 dl/g;
and
(ix) a ratio between the intrinsic viscosity of the soluble fraction and the intrinsic viscosity of the crystalline fraction (IV(SF)/IV(CF)) in the range from 1.60 to 2.70.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/020,337Filed 13 Aug 2021
Priority: EP 2019081013 Aug 2020
Published: US 2023/0303812 A128 Sep 2023
Granted: 7 Jul 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

C08L 23/12
Homopolymers or copolymers of propene: polypropene
C08K 3/34
Use of inorganic substances as compounding ingredients: silicon-containing compounds
C08L 23/06
Homopolymers or copolymers of ethene: polyethylene
C08L 23/0815
With unsaturated hydrocarbons only containing four or more carbon atoms: with aliphatic 1-olefins containing one carbon-to-carbon double bond