# US 12,215,216 B2 · Polypropylene composition for interior automotive applications

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,215,216 B2
- Document ID: US12215216B2
- Status: Granted
- Kind: B2
- Application number: 18/567,624
- Filed: 2022-06-07
- Published: 2024-08-08
- Granted: 2025-02-04
- Earliest claimed: 2021-06-09
- Assignees: Borealis AG
- Applicants: Borealis AG
- Inventors: Angelica Maëlle Delphine Legras; Daniela Mileva; Hermann Braun; Christophe Salles; Susanne Margarete Kahlen
- Web page: https://patentgrep.com/patent/US12215216B2

## CPC

- C08L 23/12: Polypropene
- C08L 23/14: Copolymers of propene (C08L23/16 takes precedence)
- C08F 210/06: Propene
- C08K 3/346: {Clay}
- C08L 2205/03: containing three or more polymers in a blend
- C08L 2205/035: containing four or more polymers in a blend
- C08L 2207/02: Heterophasic composition
- C08L 2207/20: Recycled plastic
- Y02W 30/62: Plastics recycling; Rubber recycling
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

A composition suitable for automotive application obtainable by blending at least components (A), (B) and (C): (A) 15 wt.-% to 50 wt.-%, preferably 17 to 47 wt.-%, more preferably 18 to 45 wt.-% of a mixed-plastics polypropylene blend; (B) 10 wt.-% to 60 wt.-%, preferably 15 to 55 wt.-%, more preferably 17 to 52 wt.-% of a first heterophasic propylene copolymer; and (C) 5 wt.-% to 25 wt.-%, preferably 7 to 22 wt.-%, more preferably 8 to 20 wt.-% of an inorganic filler.

## Claims

### Claim 1

A composition suitable for automotive applications:
obtainable by blending at least components (A), (B) and (C)
(A) 15 wt. % to 50 wt. % of a mixed-plastics polypropylene blend;
(B) 10 wt. % to 60 wt. % of a heterophasic propylene copolymer; and
(C) 5 wt. % to 25 wt. %, of an inorganic filler;
whereby all percentages refer to the total composition, and whereby
the mixed-plastics polypropylene blend (A) has
a crystalline fraction (CF) content determined according to CRYSTEX analysis obtained through temperature cycles of dissolution at 160° C., crystallization at 40° C. and re-dissolution in 1,2,4-trichlorobenzene at 160° C. in the range from 85.0 to 96.0 wt. %, and
a soluble fraction (SF) content determined according to CRYSTEX analysis obtained through temperature cycles of dissolution at 160° C. crystallization at 40° C. and re-dissolution in 1,2,4-trichlorobenzene at 160° C. in the range from 4.0 to 15.0 wt. %, whereby
said crystalline fraction (CF) has an ethylene content (C2(CF)), as determined by FT-IR spectroscopy calibrated by quantitative 13C-NMR spectroscopy, in the range from 1.0 to 10.0 wt. %; and
said soluble fraction (SF) has an intrinsic viscosity (iV(SF)) in the range from 0.9 to 2.1 dl/g in decalin according to DIN ISO 1628/1 at 135° C.;
the heterophasic propylene copolymer (B) comprises a matrix phase and an elastomer phase dispersed therein and has:
a melt flow rate MFR2 (230° C., 2.16 kg, ISO 1133) of 85 to 250 g/10 min;
a soluble fraction (SF) content determined according to CRYSTEX obtained through temperature cycles of dissolution at 160° C., crystallization at 40° C. and re-dissolution in 1,2,4-trichlorobenzene at 160° C. analysis in the range from more than 20.0 wt. % to 30.0 wt. %, and
an intrinsic viscosity of said soluble fraction (IV(SF)) as measured in decalin according to DIN ISO 1628/1 at 135° C. of 2.0 to 4.5 dl/g;
the composition has a:
a melt flow rate MFR2 (230° C., 2.16 kg, ISO 1133) of 20 to 60 g/10 min.

### Claim 2 (depends on 1)

The composition according to claim 1, obtainable by blending components (A), (B), (C) and one or more of the following components:
(D) 0 to 25 wt %, of a second heterophasic propylene copolymer;
(E) 0 to 10 wt % of a high density polyethylene;
(F) 0 to 20 wt % of an ethylene-based plastomer;
whereby all percentages refer to the total composition, and whereby:
the second heterophasic propylene copolymer (D) comprises a matrix phase and an elastomer phase dispersed therein and has:
a melt flow rate MFR2 (230° C., 2.16 kg, ISO 1133) of 8 to 25 g/10 min;
a soluble fraction (SF) content determined according CRYSTEX analysis obtained through temperature cycles of dissolution at 160° C. crystallization at 40° C. and re-dissolution in 1,2,4-trichlorobenzene at 160° C. in the range from 12.5 to 30.0 wt. %; and
an intrinsic viscosity of said soluble fraction, iV(SF), as measured in decalin according to DIN ISO 1628/1 at 135° C. in the range of 2.3 dl/g to 6.0 dl/g;
the high density polyethylene (E) has:
a melt flow rate MFR2 (190° C., 2.16 kg, ISO 1133) of 0.5 to 30.0 g/10 min; and
a density of 945 to 965 kg/m3; and
the ethylene based plastomer (F) being a copolymer of ethylene with comonomer units selected from alpha-olefins having from 3 to 12 carbon atoms has
a melt flow rate MFR2 (190° C., 2.16 kg, ISO 1133) of 0.2 to 2.5 g/10 min; and
a density of 850 to 870 kg/m3.

### Claim 3 (depends on 2)

The composition according to claim 2, obtainable by blending components (A), (B), (C) and (F), with (D) and (E) not being present,
(A) 15 wt. % to 35 wt. % of a mixed-plastics polypropylene blend;
(B) 30 wt. % to 60 wt. % of a first heterophasic propylene copolymer;
(C) 5 wt. % to 25 wt. % of an inorganic filler; and
(F) 5 wt. % to 20 wt. % of an ethylene-based plastomer;
whereby all percentages refer to the total composition.

### Claim 4 (depends on 2)

The composition according to claim 2, obtainable by blending components (A), (B), (C), (E) and (F), with (D) not being present,
(A) 25 wt. % to 50 wt. %, preferably 27 to 47 wt. %, more preferably 30 to 45 wt. % of a mixed-plastics polypropylene blend;
(B) 20 wt. % to 50 wt. % of a first heterophasic propylene copolymer;
(C) 5 wt. % to 25 wt. % of an inorganic filler;
(E) 2 wt. % to 10 wt. % of a high density polyethylene; and
(F) 2 wt. % to 20 wt. % of an ethylene-based plastomer;
whereby all percentages refer to the total composition.

### Claim 5 (depends on 2)

The composition according to claim 2, obtainable by blending components (A), (B), (C), (D) and (E), with (F) not being present,
(A) 25 wt. % to 50 wt. % of a mixed-plastics polypropylene blend;
(B) 15 wt. % to 30 wt. % of a first heterophasic propylene copolymer;
(C) 5 wt. % to 25 wt. % of an inorganic filler;
(D) 5 wt. % to 25 wt. % of a second heterophasic propylene copolymer; and
(E) 2 wt. % to 10 wt. % of a high density polyethylene;
whereby all percentages refer to the total composition.

### Claim 6 (depends on 1)

The composition according to claim 1, wherein the inorganic filler (C) is talc having:
a median particle size d50 before compounding of 0.3 to 30.0 micrometers; and/or
a top-cut particle size d95 before compounding of 1.0 to 50.0 micrometers.

### Claim 7 (depends on 1)

The composition according to claim 1, having:
a crystalline fraction (CF) content determined according to CRYSTEX analysis obtained through temperature cycles of dissolution at 160° C., crystallization at 40° C. and re-dissolution in 1,2,4-trichlorobenzene at 160° C. in the range from 60.0 to 90.0 wt. %, and
a soluble fraction (SF) content determined according to CRYSTEX obtained through temperature cycles of dissolution at 160° C., crystallization at 40° C. and re-dissolution in 1,2,4-trichlorobenzene at 160° C. analysis in the range from 10.0 to 40.0 wt. %, whereby
said crystalline fraction (CF) has an ethylene content (C2(CF)), as determined by FT-IR spectroscopy calibrated by quantitative 13C-NMR spectroscopy, in the range from 4.0 to 15.0 wt. %; and/or
said crystalline fraction (CF) has an intrinsic viscosity (iV(CF)), as measured in decalin according to DIN ISO 1628/1 at 135° C., of less than 1.8 dl/g; and/or
said soluble fraction (SF) has an ethylene content (C2(SF)), as determined by FT-IR spectroscopy calibrated by quantitative 13C-NMR spectroscopy, in the range from 28.0 to 65.0 wt. %; and
said soluble fraction (SF) has an intrinsic viscosity (IV(SF)), as measured in decalin according to DIN ISO 1628/1 at 135° C., of more than 1.7 dl/g.

### Claim 8 (depends on 1)

The composition according to claim 1, having a flexural modulus of from 1500 MPa to 2200 MPa.

### Claim 9 (depends on 1)

The composition according to claim 1, having a Charpy Notched Impact Strength at 23° C. of from 5.0 kJ/m2 to 50.0 kJ/m2.

### Claim 10 (depends on 1)

The composition according to claim 1, having a heat deflection temperature (ISO 75 B) of at least 95° C. and/or a coefficient of linear thermal expansion (CLTE) of from 60 to 125 μm/mK.

### Claim 11 (depends on 1)

The composition according to claim 1, having a puncture energy of from 12 to 65 J and/or an energy at maximum force of from 10 to 60 J, when determined in the instrumented falling weight test according to ISO 6603-2 at 23° C.

### Claim 12 (depends on 1)

An article comprising the composition according to claim 1.

### Claim 13 (depends on 12)

The article according to claim 12 having a MSE surface quality of below 15.