MUMBAI, India, June 13 -- Intellectual Property India has published a patent application (202517051196 A) filed by Borealis Ag, Vienna, on May 28, for 'process for producing high-flow heterophasic propylene copolymer compositions.'
Inventor(s) include Leskinen, Pauli; Wang, Jingbo; Gahleitner, Markus; and Bernreitner, Klaus.
The application for the patent was published on June 13, under issue no. 24/2025.
According to the abstract released by the Intellectual Property India: "The present invention concerns a process for producing a heterophasic propylene copolymer composition, the process comprising the steps of a) preparing a bimodal matrix phase (A) of a heterophasic propylene copolymer by a1) polymerizing in a first reactor propylene to obtain a first propylene polymer fraction having a melt flow rate MFR2 of 25 to 85 g/10 min determined according to ISO 1133 at 230 C and 2.16 kg load, a2) transferring the first propylene polymer fraction to a second reactor, and polymerizing in the second reactor propylene to obtain a second propylene polymer fraction, the combined first and second propylene polymer fractions having an MFR2 determined according to ISO 1133 at 230 C and 2.16 kg load being at least 2.2 times higher than the MFR2 of the first propylene polymer fraction, b) preparing a disperse phase (B) of the heterophasic propylene copolymer by b1 ) transferring the first propylene polymer fraction and the second propylene polymer fraction to a third reactor, and polymerizing in the third reactor propylene and an alpha-olefin having 2 or 4 to 10 carbon atoms obtain a third propylene polymer fraction, c) withdrawing the heterophasic propylene copolymer comprising the first, second and third propylene polymer fraction, and d) obtaining the heterophasic propylene copolymer composition comprising the heterophasic propylene copolymer, wherein the heterophasic propylene copolymer composition has a melt flow rate MFR2 of 75 to 250 g/10 min determined according to ISO 1133 at 230 C and 2.16 kg load, and wherein polymerizing in steps a1), a2) and b1) is conducted in the presence of a metallocene catalyst system, the metallocene catalyst system comprising a metallocene complex and a support, wherein the support comprises silica and wherein the metallocene complex is of formula (I)."
The patent application was internationally filed on Oct. 31, 2023, under International application No.PCT/EP2023/080298.
Disclaimer: Curated by HT Syndication.
