# US 11,306,197 B2 · Polypropylene composition for non-pressurized pipes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,197 B2 - Document ID: US11306197B2 - Status: Granted - Kind: B2 - Application number: 16/956,187 - Filed: 2018-12-18 - Published: 2020-10-22 - Granted: 2022-04-19 - Earliest claimed: 2017-12-22 - Assignees: Sabic Global Technologies B.V. - Applicants: Sabic Global Technologies B.V. - Inventors: Henrica Norberta Alberta Maria Steenbakkers-Menting; Patrick Elisabeth Luc Voets; Martin Alexander Zuideveld; Akhlaq A. Moman - Web page: https://patentgrep.com/patent/US11306197B2 ## CPC - C08L 23/12: Polypropene - C08F 110/06: Propene - C08L 2203/18: used for pipes - C08L 2314/02: Ziegler natta catalyst - 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 ## Abstract The invention relates to a polypropylene composition comprising a propylene homopolymer or propylene-ethylene copolymer having an ethylene content of at most (1.0) wt % based on the propylene-ethylene copolymer, wherein the amount of propylene homopolymer or propylene-ethylene copolymer is at least (98) wt %, for example at least (98.5) wt %, preferably at least (99) wt %, more preferably at least (99.5), for example at least (99.75) wt % based on the polypropylene composition, wherein the polypropylene composition has a melt flow rate in the range of (0.10) to less than (0.70) dg/min as measured according to ISO1133 (2.16 kg/230° C.), an Mw/Mn in the range from (7.0) to (13.0), wherein Mw stands for the weight average molecular weight and Mn stands for the number average weight, an Mz/Mn is in the range from (20) to (50), wherein Mz stands for the z-average molecular weight and wherein Mw, Mn and Mz are measured according to ASTM (D6474-12). ## Claims ### Claim 1 Polypropylene composition comprising a propylene homopolymer or propylene-ethylene copolymer having an ethylene content of at most 1.0 wt % based on the propylene-ethylene copolymer, wherein the amount of propylene homopolymer or propylene-ethylene copolymer is at least 98 wt %, based on the polypropylene composition wherein the polypropylene composition has a melt flow rate in the range of 0.10 to less than 0.70 dg/min as measured according to ISO1133 (2.16 kg/230° C.); an Mw/Mn in the range from 7.0 to 13.0, wherein Mw stands for the weight average molecular weight and Mn stands for the number average weight; and an Mz/Mn is in the range from 20 to 50, wherein Mz stands for the z-average molecular weight; and wherein Mw, Mn and Mz are measured according to ASTM D6474-12. ### Claim 2 (depends on 1) Polypropylene composition according to claim 1 having a melt flow rate in the range of 0.20 to 0.50 dg/min, as measured according to ISO1133 (2.16 kg/230° C.). ### Claim 3 (depends on 1) Polypropylene composition according to claim 1, wherein the composition has an amount of xylene soluble amount (XS) as measured according to ASTM D 5492-10 in the range from 0.5 to 3.5 wt %. ### Claim 4 (depends on 1) Polypropylene composition according to claim 1, wherein the composition has a pentad isotacticity of at least 94% based on the composition, wherein the isotacticity is determined using 13C NMR. ### Claim 5 (depends on 1) Polypropylene composition according to claim 1, wherein the composition is unimodal. ### Claim 6 (depends on 1) Polypropylene composition according to claim 1, further comprising additives, and wherein sum of the amount of additives and the amount of propylene homopolymer or propylene-ethylene copolymer is 100 wt % based on the polypropylene composition. ### Claim 7 (depends on 1) Polypropylene composition according to claim 1 having a flexural modulus in parallel orientation of at least 1800 MPa, as measured according to ASTM D790-10. ### Claim 8 (depends on 1) Polypropylene composition according to claim 1 having has an Izod notched impact strength in parallel orientation of at least 2.5, as measured at 23° C. according to ISO 180 4A. ### Claim 9 (depends on 1) Polypropylene composition according to claim 1, wherein the Mz/Mw of the polypropylene composition is in the range from 2.7 to 4.5. ### Claim 10 (depends on 1) Pipe comprising the polypropylene composition of claim 1. ### Claim 11 (depends on 10) Process for the preparation of the pipes of claim 10 comprising the step of providing the polypropylene composition. ### Claim 12 (depends on 1) Process for the preparation of the polypropylene composition of claim 1, comprising the step of: polymerizing propylene and optional ethylene comonomers in the presence of a catalyst, to obtain the propylene homopolymer or the propylene-ethylene copolymer, wherein said catalyst is obtainable by a process comprising the steps of A) providing a Ziegler-Natta procatalyst, wherein step (A) of providing the Ziegler-Natta procatalyst comprises the steps of contacting a magnesium-containing support with i) a halogen-containing titanium compound, ii) ethylbenzoate as an activator, iii) and as internal donor an aminobenzoate compound according to formula B: wherein each R90 group is independently a substituted or unsubstituted aromatic group; R91, R92, R93, R94, R95, and R96 are each independently selected from a hydrogen or a linear, branched or cyclic hydrocarbyl group, selected from alkyl, alkenyl, aryl, aralkyl, or alkylaryl groups, and one or more combinations thereof; R97 is a hydrogen or a linear, branched or cyclic hydrocarbyl group, selected from alkyl, alkenyl, aryl, aralkyl, alkoxycarbonyl or alkylaryl groups, and one or more combinations thereof; N is a nitrogen atom; O is an oxygen atom; and C is a carbon atom; and B) contacting said Ziegler-Natta procatalyst obtained in step A) with a co-catalyst and at least one external electron donor to obtain said catalyst. ### Claim 13 (depends on 12) Process according to claim 12, wherein as external donor in step B) a phthalate free donor is used. ### Claim 14 (depends on 11) Process according to claim 11, wherein step A) to provide the Ziegler-Natta procatalyst comprises the following steps: i) contacting a compound R4zMgX42-z with an alkoxy- or aryloxy-containing silane compound to give a first intermediate reaction product, being a solid Mg(OR1)xX12-x, wherein: R4 and R1 are each a linear, branched or cyclic hydrocarbyl group independently selected from alkyl, alkenyl, aryl, aralkyl, alkoxycarbonyl or alkylaryl groups, and one or more combinations thereof; wherein said hydrocarbyl group may be substituted or unsubstituted, may contain one or more heteroatoms; X4 and X1 are each independently selected from the group of consisting of fluoride (F—), chloride (Cl—), bromide (Br—) or iodide (I—); z is in a range of larger than 0 and smaller than 2, being 0