IP Library › Granted Patent US 12,415,875
Granted Patent B2
US 12,415,875 · App. 17/623,670 · Granted Sep 16, 2025

Long-chain branched propylene polymer composition

Inventors: Jingbo Wang (Linz, AT); Markus Gahleitner (Linz, AT); Pauli Leskinen (Porvoo, FI); Klaus Bernreitner (Linz, AT); Katja Ellen Klimke (Linz, AT)
Assignee: Borealis AG
C08F110/06C08F2810/10
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12,415,875
App. No.
17/623,670
Granted
Sep 16, 2025
Kind
B2
Abstract

The present invention relates to a propylene polymer composition comprising a long chain branched propylene polymer, wherein said propylene polymer composition has a) a xylene hot insolubles (XHU) fraction in an amount of less than 1.0%, based on 5 the total weight amount of the propylene polymer composition, b) a melting temperature Tm of less than 160° C., c) a crystallization temperature Tc of at least 115° C., and d) a F30 melt strength of from 5.0 to less than 30.0 cN, a process for producing said propylene polymer composition by reactive modification of a propylene polymer in the presence of a peroxide, an article comprising said propylene polymer composition and the use of said propylene polymer composition for producing an article.

Claims (13)

1. A propylene polymer composition comprising a long chain branched propylene polymer, wherein said propylene polymer composition has

a) a xylene hot insolubles (XHU) fraction in an amount of less than 1.0%, based on the total weight amount of the propylene polymer composition,

b) a melting temperature Tm of less than 160° C.,

c) a crystallization temperature Tc of at least 115° C., and

d) a F30 melt strength of from 5.0 to less than 30.0 cN.

2. The propylene polymer composition according to claim 1 having a V30 melting extensibility of more than 190 mm/s.

3. The propylene polymer composition according to claim 1 having a melt flow rate MFR2 (230° C., 2.16 kg) of 1.0 to 6.0 g/10 min.

4. An article comprising the propylene polymer composition according to claim 1 .

5. The propylene polymer composition according to claim 1 , having a V30 melting extensibility of 210 to 250 mm/s.

6. The propylene polymer composition according to claim 1 , having a melt flow rate MFR 2 (230° C., 2.16 kg) of from 1.4 to 5.0 g/10 min.

7. The propylene polymer composition according to claim 1 , having a xylene cold soluble (XCS) fraction in an amount of less than 2.5 wt %, based on the total weight amount of the propylene polymer composition.

8. The propylene polymer composition according to claim 1 , wherein the melting temperature Tm is in a range of 140.0° C. to 158.0° C., and the crystallization temperature Tc is in range of 116.0° C. to 125.0° C.

9. The propylene polymer composition according to claim 8 , having a xylene cold solubles (XCS) in an amount of from 0.2 to 2.2 wt. %, based on the total weight amount of the propylene polymer composition.

Assignments (2)
CHANGE OF ADDRESS Recorded Feb 23, 2022
From: BOREALIS AG
To: BOREALIS AG
Reel/Frame 059219/0949 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 10, 2022
From: WANG, JINGBO; GAHLEITNER, MARKUS; LESKINEN, PAULI; BERNREITNER, KLAUS; KLIMKE, KATJA ELLEN
To: BOREALIS AG
Reel/Frame 058977/0155 →
Priority Claims (1)
EP 19184435 · Jul 4, 2019 · regional
Continuity (1)
Related Publication 20220275118A1 · Sep 1, 2022
References Cited (40)
US 9200095B2 · Tran · 2015 [cited by applicant]
US 11834529B2 · Wang · 2023 [cited by examiner]
US 20180051160A1 · Pehlert et al. · 2018 [cited by applicant]
EP 0887379A1 · 1998 [cited by applicant]
EP 1828266A1 · 2007 [cited by applicant]
EP 3018153A1 · 2016 [cited by applicant]
EP 3018154A1 · 2016 [cited by applicant]
WO 9212182A1 · 1992 [cited by applicant]
WO 9414856A1 · 1994 [cited by applicant]
WO 9512622A1 · 1995 [cited by applicant]
WO 9924478A1 · 1999 [cited by applicant]
WO 9924479A1 · 1999 [cited by applicant]
WO 2002002576 · 2000 [cited by applicant]
WO 0068315A1 · 2000 [cited by applicant]
WO 2004000899A1 · 2003 [cited by applicant]
WO 2004111095A1 · 2004 [cited by applicant]
WO 2006097497A1 · 2006 [cited by applicant]
WO 2007116034A1 · 2007 [cited by applicant]
WO 2011076780A1 · 2011 [cited by applicant]
WO 2011135004A2 · 2011 [cited by applicant]
WO 2012001052A2 · 2012 [cited by applicant]
WO 2012084961A1 · 2012 [cited by applicant]
WO 2013007650A1 · 2013 [cited by applicant]
WO 2014016205A1 · 2014 [cited by applicant]
WO 2014016206A1 · 2014 [cited by applicant]
WO 2015158790A2 · 2015 [cited by applicant]
WO 2018122134A1 · 2018 [cited by applicant]
International Search Report and Written Opinion for PCT/EP2020/067134 mailed Sep. 2, 2020, 14 pages. [cited by applicant]
Extended European Search Report for 19184435.8 mailed Jan. 27, 2020, 11 pages. [cited by applicant]
Pivokonsky et al. “Rheologicl characterization and Modeling of Linear and Branched Metallocene Polypropylenes prepared by Reactie Processing”, Journal of Non-Newtonian Fluid Mechanics, Elsevier, NL, vol. 156, No. 1-2, J… [cited by applicant]
Busico, et al., “Microstructure of polypropylene,” Progress in Polymer Science, vol. 26, 2001, pp. 443-533, Elsevier. ain, Journal of Magnetic Resonance, vol. 176, 2005, pp. 239-243, Elsevier. [cited by applicant]
Busico, et al., “Full Assignment of the 13C NMR Spectra of Regioregular Polypropylenes: Methyl and Methylene Region,” Macromolecules, 1997, vol. 30, pp. 6251-6263, American Chemical Society. [cited by applicant]
Busico, et al., “Alk-1-ene Polymerization in the Presence of a Monocyclopentadienyl Zirconium (iv) Acetamidinate Catalyst: Microstructural and Mechanistic Insights a,” Macromolecular Rapid Commun., vol. 28, 2007, pp. 11… [cited by applicant]
Zhou, et al., “A new decoupling method for accurate quantification of polyethylene copolymer composition and triad sequence distribution with 13C NMR,” Journal of Magnetic Resonance, vol. 187, 2007, pp. 225-233. [cited by applicant]
Resconi, et al., “Selectivity in Propene Polymerization with Metallocene Catalysts,” Chem. Rev., 2000, vol. 100, pp. 1253-1345. [cited by applicant]
Cheng, H.N., “C NMR Analysis of Ethylene-Propylene Rubbers,” Macromolecules, 1984, vol. 17, 1984, pp. 1950-1955. [cited by applicant]
Wang, et al., “Structural Analysis of Ethylene/Propylene Copolymers Synthesized with a Constrained Geometry Catalyst,” Macromolecules, 2000, vol. 33, pp. 1157-1162. [cited by applicant]
Wagner, et al., “Rheotens-Mastercurves and Drawability of Polymer Melts,” Polymer Engineering and Science, 1996, vol. 36, No. 7, pp. 925-935. [cited by applicant]
Communication pursuant to Rule 114(2) EPC of Third Party Observation for Application No. EP3994186 submitted on Oct. 31, 2024, dated Nov. 13, 2024 11 pages. [cited by applicant]
“Daploy HMS Polypropylene for Foam Extrusion”, Borealis v. Berry, 2001, 20 pages. [cited by applicant]