US 12,240,974 B2
Method of making thermoplastic polyolefin
Gregory James Farrar, Roblin (CA); and Murali Mohan Reddy, Belleville (CA)
Assigned to CpK Interior Products Inc., Port Hope (CA)
Filed by CpK Interior Products Inc., Port Hope (CA)
Filed on Sep. 22, 2023, as Appl. No. 18/371,638.
Application 18/371,638 is a division of application No. 17/082,706, filed on Oct. 28, 2020, granted, now 11,807,753.
Prior Publication US 2024/0010830 A1, Jan. 11, 2024
Int. Cl. C08L 53/00 (2006.01)
CPC C08L 53/00 (2013.01) [C08L 2205/025 (2013.01); C08L 2205/03 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A method of making a thermoplastic polyolefin (TPO) composition, the method comprising:
(a) mixing together an olefin-block copolymer (OBC), polypropylene, an adhesion promoter and stabilizers, to form a mixture;
wherein the olefin-block copolymer is at a concentration of greater than or equal to about 50 wt. % to less than or equal to about 70 wt. %;
wherein the polypropylene is at a concentration of greater than or equal to about 10 wt. % to less than or equal to about 20 wt. %;
wherein the adhesion promoter at a concentration of greater than or equal to about 1 wt. % to less than or equal to about 10 wt. %;
wherein the stabilizers comprise a sulfur-free stabilizer additive at a concentration of greater than or equal to about 0.1 wt. % to less than or equal to about 0.8 wt. %;
wherein the stabilizers comprise non-migratory hindered amine light stabilizers (HALS) and a color pigment at a concentration of greater than or equal to about 2 wt. % to less than or equal to about 6 wt. %;
(b) melt extruding the mixture to form an extruded material;
(c) pelletizing the extruded material to form TPO pellets;
(d) forming artificial leather or rolled film from the TPO pellets; and
(e) directly bonding an open cell polyurethane foam to the artificial leather or rolled film.